Answers
Answer:
c sodium chloride
Explanation:
because i took the test
Answer:
C
Explanation:
Related Questions
Answer the following Critical Thinking Questions. Each answer is worth 5 points, for a total of 25 points.
A particular star is 20 pc away from the Earth, and its luminosity is 160 times the luminosity of the Sun and has a surface temperature of 4000 K. Its absolute magnitude is -0.66. The temperature of the Sun is 5800 K. Explain/show your work.
What is this star's parallax?
What is this star's spectral class?
What is the wavelength at which this star radiates the most energy?
What is this star's apparent magnitude?
What is this star's radius, in solar radii?
Answers
Using the absolute magnitude (M) and apparent magnitude (m) relation, we can find the star's apparent magnitude:
m - M = -5 + 5 log(d)
where d is the distance to the star in parsecs.
Plugging in the values we have, we get:
m - (-0.66) = -5 + 5 log(20)
m = 3.34
Therefore, this star's apparent magnitude is 3.34.
The star's luminosity is 160 times that of the Sun.
Using the Stefan-Boltzmann law, we can find the star's radius:
L = 4πR²σT⁴
where L is the luminosity, R is the radius, σ is the Stefan-Boltzmann constant, and T is the surface temperature.
We can write the ratio of the star's luminosity to that of the Sun as:
L/Lsun = (R/Rsun)²(T/Tsun)⁴
Plugging in the values we have, we get:
160 = (R/Rsun)²(4000/5800)⁴
Solving for R, we get:
R = 10.7 R⊙
Therefore, this star's radius is 10.7 times that of the Sun.
Using Wien's law, we can find the wavelength at which the star radiates the most energy:
λmax = 2.898 × 10⁶ / T
Plugging in the values we have, we get:
λmax = 724.5 nm
Therefore, this star radiates most of its energy at a wavelength of 724.5 nm.
The star's surface temperature is 4000 K.
Using the Harvard spectral classification system, we can find the star's spectral class based on its surface temperature:
O B A F G K M
50,000 10,000 7500 6000 5200 3700 2400
The star's surface temperature falls in the range of a K-type star.
Therefore, this star's spectral class is K.
Finally, we can use the definition of parallax to find the star's parallax:
p = 1/d
where p is the parallax in arcseconds and d is the distance to the star in parsecs
Hitting a ball off a tee would be considered which of the following?
A.
A closed serial skill
B.
An open continuous skill
C.
An open discrete skill
D.
A closed discrete skill
Answers
2. You are kite-surfing and your kite is pulling
you upwards at an angle of 60° with respect to
the ocean, with a force of 1200 Newtons. What
component of that force is up? How much of it
is sideways, parallel to the water?
Answers
The upward component of that force is 1039.23 N.
The parallel component of that force is 600N.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body.
The magnitude of force = 1200 Newtons.
Angle with respect to the ocean = 60°.
The upward component of that force is = F sin60° = 1200×sin60° N = 1039.23 N.
The parallel component of that force is = F cos60° = 1200× cos60° N = 600N.
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Describe the fit* formula for moderate physical activities
Answers
Fit formula for moderate physical activities is Frequency , intensity , time and type exercise.
The FIT formula of achieving healthy lifestyle is frequency , intensity type and time exercise. It is a flexible exercise framework for achieving health and well being.
Frequency is how often you exercise . Intensity is how hard you are working . Type is a type of exercise you are doing and Time is how long you exercise .F = 5 or more days per week . I = equal to brisk walk. T = at least 30 to 60 mins.
Thus, FIT formula for moderate physical activities is Frequency , intensity , type and time exercise.
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The prediction that alcohol slows reaction time is:_________.
a) nondirectional
b) directional
c) semi directional
d) partially directional
Answers
Answer:
b) directional
Explanation:
The prediction that alcohol slows reaction time is Directional . This is because for alcohol to be known as one which slows reaction time means there have been various hypothesis conducted which supports this.
In this case, formulation of a null hypothesis is usually necessary which means that alcohol does not slow reaction time and another alternative hypothesis that suggests that alcohol slows reaction time.
why does the current splits in parallel circuit and why does the voltage remains equal?
Answers
Voltage:
It is basically the difference between the charges of the materials on the ends of the Wire
also known as potential difference
It is very similar to the movement of air, it moves from higher density to lower density. in this case, the change in density is the potential difference
So, since voltage is the difference between the charge available on the ends of a wire. Even if the wire splits in parallel circuit, the difference of the charges remains the same
the more the potential difference, the faster electrons will move to the material with lower charge
Current:
Current is the amount of electrons moving through a cross-section of a wire in a period of time
So basically, it is the amount of electrons that move across a given point on a wire in a period of time
If the wire splits, we will have the same amount of electrons moving through as they would if the wire was not split but now, the electrons passing are divided and hence, if we measure the current after the split, we will find that we have a lower current
that's because we have less charge moving through the cross-section of the wire since some of those electrons are moving through a different wire
That's why the current splits in a parallel circuit
A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. How much nonconservative work (in kJ) was done on the boy?
Answers
A 66.1-kg boy is surfing and catches a wave which gives him an initial speed of 1.60 m/s. He then drops through a height of 1.59 m, and ends with a speed of 8.51 m/s. The nonconservative work done on the boy is approximately -42.7 kilojoules.
To find the nonconservative work done on the boy, we need to consider the change in the boy's mechanical energy during the process. Mechanical energy is the sum of the boy's kinetic energy (KE) and gravitational potential energy (PE).
The initial mechanical energy of the boy is given by the sum of his kinetic energy and potential energy when he catches the wave:
E_initial = KE_initial + PE_initial
The final mechanical energy of the boy is given by the sum of his kinetic energy and potential energy after he drops through the height:
E_final = KE_final + PE_final
The nonconservative work done on the boy is equal to the change in mechanical energy:
Work_nonconservative = E_final - E_initial
Let's calculate each term:
KE_initial = (1/2) * m * v_initial^2
= (1/2) * 66.1 kg * (1.60 m/s)^2
PE_initial = m * g * h_initial
= 66.1 kg * 9.8 m/s^2 * 1.59 m
KE_final = (1/2) * m * v_final^2
= (1/2) * 66.1 kg * (8.51 m/s)^2
PE_final = m * g * h_final
= 66.1 kg * 9.8 m/s^2 * 0
Since the boy ends at ground level, the final potential energy is zero.
Substituting the values into the equation for nonconservative work:
Work_nonconservative = (KE_final + PE_final) - (KE_initial + PE_initial)
Simplifying:
Work_nonconservative = KE_final - KE_initial - PE_initial
Calculating the values:
KE_initial = (1/2) * 66.1 kg * (1.60 m/s)^2
PE_initial = 66.1 kg * 9.8 m/s^2 * 1.59 m
KE_final = (1/2) * 66.1 kg * (8.51 m/s)^2
Substituting the values:
Work_nonconservative = [(1/2) * 66.1 kg * (8.51 m/s)^2] - [(1/2) * 66.1 kg * (1.60 m/s)^2 - 66.1 kg * 9.8 m/s^2 * 1.59 m]
Calculating the result:
Work_nonconservative ≈ -42.7 kJ
Therefore, the nonconservative work done on the boy is approximately -42.7 kilojoules. The negative sign indicates that work is done on the boy, meaning that energy is transferred away from the boy during the process.
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write an expression whose value is the character at index 3 of the str associated with s.
Answers
s[3] is an expression whose value is the character at index 3 of the str associated with s.
What string method can be used to check whether the text variable's string only contains letters?
Checking whether a string only contains alphabetical characters requires the use of the Python isalpha() string method. I.e., isalpha() determines whether a string is composed entirely of letters.
The indexOf() method searches the entire calling string for the specified substring with such a single argument of a substring to look for and returns the index of the first occurrence.
Therefore, The value of the expression s[3] is the character found at index 3 of the str linked to s.
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n Fig. P9.82, the cylinder Figure P9.82 and pulley turn without friction about stationary horizontal axles that pass through their centers. A light rope is Pulley wrapped around the cylinder, passes over the pulley, and has a 3.00 kg box Cylinder Box suspended from its free end. There is no slipping between the rope and the pulley surface. The uniform cylinder has mass 5.00 kg and radius 40.0 cm. The pulley is a uniform disk with mass 2.00 kg and radius 20.0 cm. The box is released from rest and descends as the rope unwraps from the cylinder. Find the speed of the box when it has fallen 2.50 m.
Answers
The speed of the box when it has fallen 2.50 m is 4.22 m/s.
What is the speed of the box?
The speed of the box when it has fallen through the given height is calculated as follows;
Apply the principle of conservation of energy to determine the speed of the box.
ΔK.E = ΔP.E
K.Ef - K.Ei = mg(hf - hi)
K.Ef - 0 = mg(hf - 0)
K.Ef = mghf
where;
K.E is the final kinetic energy = rotational + translational kinetic energyhf is the final height of the box¹/₂mv² + ¹/₂I_pω² + ¹/₂I_cω²= mghf
¹/₂mv² + ¹/₂(I_p + I_c)ω² = mghf
where;
I_p is moment of inertia of the pulleyI_c is the moment of inertia of the cylinderω is the angular speed of the boxm is mass of the boxI_p = ¹/₂MR²
where;
M is mass of the pulleyR is the radius of the pulleyI_p = ¹/₂(2)(0.2)² = 0.04 kgm²
I_c = MR²
I_c = (5)(0.4)²
I_c = 0.8 kgm²
¹/₂mv² + ¹/₂(I_p + I_c)(v/r)² = mghf
¹/₂mv² + ¹/₂r²(I_p + I_c)v² = mghf
¹/₂v²[m + 1/r²(I_p + I_c)] = mghf
v²[m + 1/r²(I_p + I_c)] = 2mghf
v² [3 + 1/0.4²(0.04 + 0.8)] = 2(3)(9.8)(2.5)
v² [3 + 1/0.4²(0.04 + 0.8)] = 2(3)(9.8)(2.5)
8.25v² = 147
v² = 147/8.25
v² = 17.8
v = √17.8
v = 4.22 m/s
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1)Answer the following question in sort
a)Define pressure ?
b)What is the value of standard atmospheric pressure?
c)Mention any one application of liquid pressure in our daily life?
d)Mention in the name of the instruments used to measure the pressure of compressed air?
e)Which instrument is used to measure atmospheric pressure ?
f)What is the unit of compressed air?
g)Define standard atmospheric pressure?
h)Which property of liquid is applicable in water supply system in cities?
i)Which property of liquid supports to use in it in hydraulic machine?
2)Answer the following questions in detail a)Define atmospheric pressure? Prove the presence of atmospheric pressure with the help of an activity?
b)Derive that P=dgh?
c)Describe the structure and working method of mercury barometer briefly?
d)Enlist any three points to show the importance of atmospheric pressure?
e)Enlist any four application of liquid pressure?f)Mention any three events occurred in our daily life which are directly related with pressure?
Answers
1)a) Pressure is the force exerted per unit area, measured in units such as pascals (Pa) or pounds per square inch (psi).
b) The value of standard atmospheric pressure is approximately 101.3 kilopascals (kPa) or 1 atmosphere (atm).
c) One application of liquid pressure in our daily life is in hydraulic systems, like car brakes, where liquid pressure is used to transmit force and amplify it.
d) The instruments used to measure the pressure of compressed air include pressure gauges or manometers.
e) An instrument called a barometer is used to measure atmospheric pressure.
f) The unit of compressed air is typically measured in pounds per square inch (psi) or pascals (Pa).
g) Standard atmospheric pressure is the pressure exerted by the Earth's atmosphere at sea level. It is approximately equal to 1 atm or 101.3 kPa.
h) The property of liquid that is applicable in water supply systems in cities is its ability to flow and exert pressure, allowing water to be distributed through pipes and reach different levels in buildings.
i) The property of liquid that supports its use in hydraulic machines is its incompressibility, allowing it to transmit force and energy effectively.
2) a)Atmospheric pressure is the force exerted by the weight of the Earth's atmosphere on a surface.
b) The equation P = dgh. This equation can be derived by considering the weight of the fluid column and the force it exerts on a unit area at the base.
c) A mercury barometer consists of a glass tube filled with mercury, inverted into a dish of mercury. The mercury in the tube adjusts its height based on the atmospheric pressure.
d) The importance of atmospheric pressure can be seen in its role in weather patterns, maintaining the balance of gases in the atmosphere, and facilitating breathing for humans and animals.
e) Applications of liquid pressure include hydraulic systems in machinery, such as lifts and cranes, hydraulic brakes in vehicles, and water towers for maintaining water pressure in buildings.
f) Events in daily life directly related to pressure include inflating a balloon, using a bicycle pump to inflate tires, and squeezing toothpaste out of a tube.
1)a) Pressure is defined as the force per unit area. Its unit in the S.I system is newtons per square meter (N/m²) or Pascal (Pa).
b) The value of standard atmospheric pressure at sea level is 101.3 kPa (kilopascals) or 1 atm (atmosphere). c) Liquid pressure has numerous applications in our daily life, but one of the most common ones is the hydraulic braking system used in cars.
d) An instrument used to measure the pressure of compressed air is called a pressure gauge. e) An instrument used to measure atmospheric pressure is called a barometer.
f) The unit of compressed air is generally psi (pounds per square inch).
g) Standard atmospheric pressure is the pressure exerted by the atmosphere at sea level and is equal to 101.3 kPa or 1 atm.
h) The property of liquids that is applicable in water supply systems in cities is their incompressibility. i) The property of liquids that supports their use in hydraulic machines is their incompressibility.
2)a) Atmospheric pressure is defined as the force per unit area exerted by the weight of the atmosphere on the surface. It is proven with the help of the following activity: Take a glass full of water and place a cardboard over it. Hold the cardboard tight and invert the glass. The water will not spill out of the glass, which is because the atmospheric pressure is greater on the cardboard than the pressure inside the glass.
b) The pressure exerted by a fluid can be derived using P = dgh, where P is the pressure, d is the density, g is the acceleration due to gravity, and h is the height of the fluid column.
c) A mercury barometer is made up of a glass tube that is closed at one end and filled with mercury. The tube is inverted and placed in a container of mercury. The pressure of the atmosphere on the open surface of the container forces the mercury in the tube to rise to a height that is proportional to the atmospheric pressure.
d) The importance of atmospheric pressure can be explained by the following points: it enables breathing, regulates the weather, and causes the ocean tides.
e) Some applications of liquid pressure include hydraulic brakes in cars, hydraulic lifts, and hydraulic jacks.
f) Some events that are directly related to pressure include gas escaping from a pressurized container, balloons being inflated, and soda cans being opened.
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Electromagnetic radiation of a specific wavelength or energy is called
A. a photon
B. a speed
C. a threshold
D an optimal length
Answers
Electromagnetic radiation of a specific wavelength or energy is called a photon.
Electromagnetic radiation of a specific wavelength or energy is called a photon. A photon is a fundamental particle of light and is the smallest unit of electromagnetic radiation. It has no mass, but carries energy and momentum. Photons travel through space at the speed of light and can exhibit both wave-like and particle-like behaviors.The energy of a photon is directly proportional to its frequency or inversely proportional to its wavelength. This relationship is known as the Planck-Einstein equation and can be expressed as E = hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the radiation.When a photon interacts with matter, it can be absorbed, reflected, or scattered. The energy of the photon is transferred to the absorbing material, causing an excitation or ionization of the atoms or molecules. This process is the basis for many scientific techniques, such as spectroscopy, where the absorption or emission of photons by a material is used to identify its chemical composition and structure. Understanding the properties of photons and their interactions with matter is essential for many fields of science, including optics, physics, and chemistry.
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The body of a snorkeler swimming in salt water has a resistance of about 605 Ω . If the snorkeler is unfortunate enough to be struck by the eel, what current will flow through her body?
Answers
Resistance of snorkeler, R = 605 Ω.
Current, I = V/R 500/605 = 0.83 A
⇒ I = 0.83 A.
The flow of charge across the cell membrane creates an electric current. Cells control the flow of specific charged elements across membranes using proteins that reside on the cell surface and create openings for specific ions to pass through. These proteins are called ion channels.
For example, if there is a voltage difference between one arm and the other a current will flow through the body. The human body has a higher impedance to DC current than to its AC current. That is, a person can withstand the effects of an electric shock caused by a DC voltage more than he can by an AC voltage. It interferes with the normal functioning of the nervous and muscular systems, causing severe muscle contractions.
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How do you label a bar graph of work compared with power?
Answers
Answer:
You must label the horizontal axis with the names of the airlines and the vertical axis with the number of flights. The title must clearly state what data the bar chart is showing. With larger numbers, your scale may not go up by one.
Answer:
You must label the horizontal axis with the names of the airlines and the vertical axis with the number of flights. The title must clearly state what data the bar chart is showing. With larger numbers, your scale may not go up by one.
Explanation:
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Perform an experiment in which you roll a ball 43,700 cm before it comes to a stop. Write this measurement in scientific notation
Answers
The number 43,700 cm when written by the use of the scientific notation will be written as 4.37 * 10^4 cm.
What is the scientific notation?The scientific notation involves writing a number in such a way that it does not involve a lot of digits. This methods helps us to save space that would have been used to write long digits.
Hence, the number 43,700 cm when written by the use of the scientific notation will be written as 4.37 * 10^4 cm.
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How is the pressure of a gas related to its concentration of particles?
Answers
Hope this helps!
Answer:
Explanation:
Pressure will expand a gas, enlarging its volume and reducing its density and concentration of particles. Pressure will magnify a gas, developing its volume and multiplying its density and concentration of particles.
Increasing the pressure of a gas is exactly the same as increasing its concentration. If you have a given mass of gas, the way you increase its pressure is to squeeze it into a smaller volume. If you have the same mass in a smaller volume, then its concentration is higher.
Mrs Turner has a scale drawing of her apartment.IN the scale drawing the lenght of her apartment is 6.25 inches and the width is 2.75 onches. If Mrs. Turner used the scale factor 1 inc/18ft, what would the area of the apartment be?
Answers
The area of Mrs. Turner's apartment is approximately 0.05304 square feet.
To find the area of Mrs. Turner's apartment, we need to convert the measurements from the scale drawing to the actual measurements in feet, using the given scale factor of 1 inch/18 feet.
Length of apartment in feet = 6.25 inches × (1 foot/18 inches) = 0.34722 feet
Width of apartment in feet = 2.75 inches × (1 foot/18 inches) = 0.15278 feet
Now, we can calculate the area of the apartment in square feet by multiplying the length and width:
Area of apartment in square feet = Length × Width = 0.34722 feet × 0.15278 feet = 0.05304 square feet
Therefore, the area of Mrs. Turner's apartment is approximately 0.05304 square feet.
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If a rock hits the ground with a KE of 33,000 J, falling from a height of 10 m, what is its weight? Remember, weight is measured in newtons (N), and is equal to mass times gravity.
A. 330 N
B. 33 N
C. It can't be computed from this information
D. 3,300 N
Answers
Answer is 3,300N
Explanation
Please answer. Find the maximum height
Answers
The maximum height be 3.01 m.
What is conservation of energy?According to the law of conservation of energy: The total energy of the system is conserved in a closed system, also known as an isolated system.
Given parameters:
Mass of the box: m = 2.0 kg
Spring constant: k = 2000 N/m.
Compression of spring: x = 20 cm = 0.2m
Angle of inclination: θ = 37°
Coefficient of friction: μ = 0.1
If the box raises up to distance d then according to law of conservation of energy:
1/2kx² = mgdsin37° + μ mg d sin37°
1/2kx² = mgdsin37°(1 + μ)
d = 1/2kx²/(1+μ)mgsin37° = 1/2 × 2000 × 0.2²/{(1+0.1) × 2 × 10 × sin37°}
= 3.01 m.
Hence, The maximum height be 3.01 m.
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How does Newtons second law of motion relate to Track and field (running sport)?
Answers
in a frictionless setup, two block of different masses are laying on two incline planes with different slopes and joined together by a pulley (see figure). find the acceleration of each block and the tension in the rope. also write the criteria (or equation) needed to be satisfied for block 2 to be moving down its incline plane.
Answers
Answer:
Explanation:
The problem you're describing involves two blocks connected by a rope over a pulley, with each block resting on a separate incline plane. The acceleration of each block and the tension in the rope can be determined using the principles of dynamics and conservation of energy.
Let's call the masses of the two blocks m1 and m2, the incline angles of the two planes θ1 and θ2, and the acceleration of each block a1 and a2.
The net force on each block is given by the sum of the gravitational force, the normal force, and the tension in the rope.
For block 1:
m1 * g * sin(θ1) - m1 * a1 = T
For block 2:
m2 * g * sin(θ2) - m2 * a2 = -T
where g is the acceleration due to gravity and T is the tension in the rope.
From these equations, we can see that the tension in the rope is equal in magnitude but opposite in direction for each block. The acceleration of each block can be found by rearranging the equations and solving for a1 and a2.
The condition for block 2 to be moving down its incline plane is that the net force on the block must be in the direction of motion, which means that the tension in the rope must be less than the gravitational force acting on the block. This can be expressed as:
T < m2 * g * sin(θ2)
Here is a definition of each variable in the problem:
m1: mass of block 1
m2: mass of block 2
θ1: incline angle of the first plane
θ2: incline angle of the second plane
a1: acceleration of block 1
a2: acceleration of block 2
g: acceleration due to gravity
T: tension in the rope
I hope this helps! Let me know if you have any other questions or if you need further clarification.
A flat sheet of paper of area 0.450 m2 is oriented so that the normal to the sheet is at an angle of 600 to a uniform electric field of magnitude 18 N C-1. What is the magnitude of the electric flux through the sheet? A. 3.22 N m2 C-1 B. 21.42 N m2 C-1 C. 5.04 N m2 C-1 D. 11.72 N m2 C-1 E. 4.05 N m2 C
Answers
The magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹ (Option E).
The electric flux through a surface is given by the product of the electric field strength and the area of the surface projected perpendicular to the electric field.
In this case, the electric field strength is 18 N C⁻¹, and the area of the sheet projected perpendicular to the electric field is 0.450 m²
(since the normal to the sheet makes an angle of 60° with the electric field). Multiplying these values gives the electric flux:
Electric flux = Electric field strength × Area
Electric flux = 18 N C⁻¹ × 0.450 m²
Electric flux = 8.1 N m² C⁻¹
In summary, the magnitude of the electric flux through the sheet is 4.05 N m² C⁻¹. This value is obtained by multiplying the given electric field strength by the projected area of the sheet perpendicular to the electric field.
The angle of 60° is taken into account to determine the effective area for calculating the flux.(Option E).
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What are the different kinds of charges?
Answers
Answer:
There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel each other and unlike charges attract each other. An object with an absence of net charge is referred to as neutral.
Explanation:
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PLEAS HELPPP ITS FOR A FORENSIC SCIENCE CLASS
USE COMPLETE SENTENCES PLEAS
The picture is the crime scene that you will use for the questions there are 1-9 questions and you have to draw out the picture in a peace of paper and DRAW the lines of convergence and area of convergence for question 2 you will also for question 2 For question 2 Do it in order for the question where the person got shot put it by which death is quicker
Directions: In this exam you will be asked to analyze a crime scene and describe what the blood spatter can tell us.
USE COMPLETE SENTENCES AND PROPER SPELLINGS. (You have autocorrect, please use it) blood
The scene:
You enter the scene and find 2 bodies. One has been shot in the head. The other has been shot in the chest and has blood coming from their mouth and nose.
Questions
1) Which man was shot in the head, and which was shot in the chest. Use evidence from the scene to back up your claim. (1pt)
2) Find the area of convergence for both gunshot sites. (2pts)
3) How would you find the angle that the blood impacted the ground? (1pt)
4) How would you explain the bright red smaller spatter? (1pt)
5) How would you explain the small circular drops in-between position 2 and man #2? What does this tell us? (1pt)
6) Why are there large pools of blood below both men’s bodies? (1pt)
7) How do you explain the 1 large droplet going in the opposite direction of the other 4 large droplets in position 2? (1pt)
8) What are the smaller secondary droplets around primary droplets called? (1pt)
9) Who shot first? (1pt)
Answers
1) The man who was shot in the head was shot at a closer range than the man who was shot in the chest, as evidenced by the large pool of blood around his body. The man shot in the chest was shot at a slightly further range, as evidenced by the smaller pools of blood around him.
2) The area of convergence for both gunshot sites can be found by drawing a line from the center of each pool of blood and extending it into the room. The point where the two lines meet is the area of convergence.
3) The angle that the blood impacted the ground can be determined by measuring the angle between the direction of the droplets and the ground.
4) The bright red smaller spatter is caused by the presence of high velocity blood droplets, which are propelled at a high velocity when the bullet impacts the body.
5) The small circular drops in-between position 2 and man #2 are likely caused by a back spatter, which is a phenomenon where blood is propelled in the opposite direction of the force that caused it. This could mean that the man in position 2 was shot first.
6) There are large pools of blood below both men’s bodies because they were both shot at a close range, which caused a large amount of blood to be expelled from their bodies.
7) The large droplet going in the opposite direction of the other 4 large droplets in position 2 is likely caused by a back spatter, which is a phenomenon where blood is propelled in the opposite direction of the force that caused it. This could mean that the man in position 2 was shot first.
8) The smaller secondary droplets around primary droplets are called satellite droplets.
9) It is not possible to tell who shot first based on the evidence provided.
Do lighting filters use additive or subtractive properties to bring light of a certain color to our eyes?
Answers
Answer:
Different colour lights (RBG) uses additive properties to bring light of a certain color to our eyes.
Explanation:
:))
1. In mechanical waves, which property determines the energy of the wave?
a. Frequency
b. Wavelength
c. Amplitude
d. Period
2. In light waves, which property determines the amount of energy in the wave?
a. Frequency
b. Wavelength
c. Amplitude
d. Period
3. Which mathematical function models the shape of a transverse wave?
a. Sine
b. Cosine
c. Tangent
4. What is the relationship between period and frequency?
a. Period is the inverse of frequency.
b. Period is a multiple of frequency.
c. Period is the quotient of frequency.
d. Period is the sum of all the frequencies.
Answers
Answer:
I only know the first 2
Explanation:
1. A
2. B
Explain how the energy from the sun is transferred to fossil fuel?
Answers
Answer:
Fossil fuels are energy sources that come directly from nature. First, the sun's radiant energy is stored as chemical energy in plants by photosynthesis. When the plants die, they start decaying. After many years, the plants are turned into fossil fuels.
Explanation:
Fossil fuels rely on the Sun's energy because the energy in fossil fuels came from plants and algae as they performed photosynthesis, which requires sunlight.
When sunlight strikes a plant, some of the energy is trapped through photosynthesis and is stored in chemical bonds as the plant grows.
(u should paraphrase it)
what is the first letter of the alphabet?
A:B B:A
C:Z or D:D
Answers
Answer:
B:A
Explanation:
because the alphabet goes
A B C D E F G
Answer: B.) A
This was a little complicated because of the answer letters LOL
the mass of the velociraptor and cage together is 175 kg. What is the gravitational potential energy added when when the velociraptor and cage is lifted from the ground to a height of 9 m?
Answers
The gravitational potential energy added when the velociraptor and cage is lifted from the ground to a height of 9 m is approximately 15,998.95 joules.
What is Potential Energy?
Potential energy is a form of energy that is stored in an object due to its position or configuration in a system. It is the energy that an object has the potential to possess, or the ability to do work, as a result of its position or state.
The gravitational potential energy (GPE) added when the velociraptor and cage is lifted from the ground to a height of 9 m can be calculated using the formula:
GPE = mgh
Where m is the mass of the velociraptor and cage, g is the acceleration due to gravity (approximately 9.81 m/\(s^{2}\)), and h is the height lifted.
Given that the mass of the velociraptor and cage together is 175 kg, and the height lifted is 9 m, we can substitute these values into the formula:
GPE = mgh
GPE = (175 kg) x (9.81 m/\(s^{2}\)) x (9 m)
GPE = 15,998.95 J (joules)
Learn more about Potential Energy from the given link
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Which category within the field of anthropology is most concerned with artifacts and fossils?
A. Cultural anthropology
B. Physical anthropology
C. Social anthropology
Answers
Answer:
Cultural anthropology
Explanation:
Answer:
It's B. physical anthropology for I took the quiz and got it correct with this answer.
Explanation:
When a solid object is subjected to a tension
force, T on both ends it will stretch by a distance
denoted AL. A quantity called the strain,
denoted by & is the distance stretched, AL
divided by the original length of the object, Lo,
i.e. & = AL/Lo. For many materials, the
applied tension force is measured to be linearly
proportional to the strain times the cross-
sectional area, A of the object i.e.
ΤαεΑ
The figure shows an object with a circular cross-
section of diameter d and original length Lo. If
object 2 has twice the diameter and twice the
starting length of object 1 (and is made of the
same material), what must be the ratio T₂/T₁ so
that the two objects have the same strain.
Answers
The tension force on object 2 must be one-fourth the tension force on object 1. The correct option is D.
How to explain the valueThe cross-sectional area is directly proportional to the square of the diameter, or A = πd²/4.
The Young's modulus is a constant for a given material.
Therefore, the change in length is proportional to the tension force and the square of the diameter.
For the two objects to have the same change in length, they must also have the same tension force.
The tension force is inversely proportional to the cross-sectional area, or F = EA/L0.
Therefore, the tension force is inversely proportional to the square of the diameter.
If object 2 has twice the diameter of object 1, then it will have four times the cross-sectional area.
Therefore, the tension force on object 2 must be one-fourth the tension force on object 1.
In other words, T2/T1 = 1/4.
Learn more about tension on
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