An ar thlled totoidal solenoid has a moan radius of 15.4 cm and a Part A Crosis tiectional area of 495 cm 2
as shown in (Figure 1). Picture thes as tive toroidis core around whach the windings are wrapped to form What is the least number of furns that the winding must have? the foroidat solenod The cirrent flowing through it is 122 A, and it is desired that the energy stored within the solenoid be at least 0.393 J Express your answer numerically, as a whole number, to three significant figures,
Answers
To determine the least number of turns required for the winding of a toroidal solenoid, we need to consider the current flowing through it, the desired energy stored within the solenoid, and the solenoid's mean radius and cross-sectional area.
The energy stored within a solenoid is given by the formula U = (1/2) * L * I^2, where U is the energy, L is the inductance of the solenoid, and I is the current flowing through it.
For a toroidal solenoid, the inductance is given by L = μ₀ * N^2 * A / (2πr), where μ₀ is the permeability of free space, N is the number of turns, A is the cross-sectional area, and r is the mean radius.
We are given the values for the cross-sectional area (495 cm^2), current (122 A), and desired energy (0.393 J). By rearranging the equation for inductance, we can solve for the least number of turns (N) required to achieve the desired energy.
After substituting the known values into the equation, we can solve for N and round the result to the nearest whole number.
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Related Questions
I need help on problem 1. To find the work done on the gas in kj and finding how much energy is required for a piston to compress the gas back to its original volume with an efficiency of 32% Also in kj.
Answers
1) Workdone = -7.5 kJ
2) Energy = 23 kJ
Explanations:The number of moles of the ideal gas, n = 3 moles
Temperature, T = 273K
Let the old volume be V₁
Let the new volume be V₂
The new volume is three times as large as the old volume
That is, V₂ = 3V₁
The gas constant, R = 8.314
1) The workdone in the gas
The workdone in expanding the gas is given by the formula:
\(W\text{ = -nRT ln(}\frac{V_2}{V_1})\)Substitute the values for this parameters into the formula above:
\(\begin{gathered} W\text{ = -3}\times8.314\times273\times\text{ ln(}\frac{3V_1}{V_1}) \\ W\text{ = -3}\times8.314\times273\times\text{ ln 3} \\ W\text{ = -3}\times8.314\times273\times\text{ 1.0986} \\ W\text{ = }-7480.55J \\ W\text{ = }\frac{-7480.55}{1000}kJ \\ W\text{ = }-7.48\text{ kJ} \\ W\text{ = -7.5 kJ (to the nearest 1 decimal place)} \end{gathered}\)2) The energy required for a piston to compress the gas back to its original volume with an efficiency of 32%
\(\text{Efficiency = }\frac{Work}{\text{Energy}}\times\text{ 100\%}\)\(\begin{gathered} 32\text{ = }\frac{-7.5}{\text{Energy}}\times100 \\ \frac{32}{100}=\text{ }\frac{-7.5}{\text{Energy}} \\ 0.32\text{ = }\frac{-7.5}{\text{Energy}} \\ \text{Energy = }\frac{-7.5}{0.32} \\ \text{Energy = -23.4 kJ} \end{gathered}\)Since the piston is compressing the gas, a positive work is done on the system. Therefore, Energy = 23.4 kJ
Energy = 23 kJ (to the nearest whole number)
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
Answers
Answer:r other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by
Explanation:
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
(1) A block of wood weighs 980N on earth where acceleration due to gravity is 9.8N/Kg. The
moon has acceleration times that on earth. Determine the weight of the block of wood
on the moon.
(3 marks)
Answers
Given,
Weight of a block on the Earth = 980 N
Acceleration due to gravity on Earth = 9.8 N/kg
To find,
Weight of the block on the moon.
Solution,
The moon has acceleration (1/6) times that on earth. Let m be the mass of the block on the moon.
We know that,
W = mg
\(m=\dfrac{W}{g}\\\\m=\dfrac{980}{9.8}\\\\=100\ kg\)
As mass of an object remains the same everywhere. Weight of the block on Moon is :
W' = mg'
As g'=(g/6)
So,
\(W=100\times \dfrac{g}{6}\\\\=100\times \dfrac{9.8}{6}\\\\=163.33\ N\)
So, the weight of the block on the moon is 163.33 N.
a solid cylinder of mass and radius has a string wound around it. a person holding the string pulls it vertically upward, as shown above, such that the cylinder is suspended in midair for a brief time interval and its center of mass does not move. the tension in the string is , and the rotational inertia of the cylinder about its axis is . the linear acceleration of the person's hand during the time interval is
Answers
The linear acceleration of the person's hand is given by:
a = (mg * r)/I.
What is linear acceleration?The constant acceleration of a moving item travelling in a straight line is referred to as linear acceleration. It is described as the rate at which linear velocity changes in relation to time.
Since the cylinder is suspended in midair, the tension in the string equals the weight of the cylinder, which is given by:
T = mg
where m is the mass of the cylinder and g is the acceleration due to gravity.
The torque exerted by the tension on the cylinder is given by:
τ = Tr
where r is the radius of the cylinder.
Since the center of mass of the cylinder is not moving, the net torque on the cylinder must be zero. Therefore:
τ = Iα
where I is the moment of inertia of the cylinder and α is its angular acceleration.
Substituting the expressions for τ and T, we get:
Tr = Iα
Solving for α, we get:
α = Tr/I
The linear acceleration of the person's hand is equal to the product of the angular acceleration and the radius of the cylinder:
a = αr
Substituting the expressions for α and T, we get:
a = Tr/I * r = (mg * r)/I
Therefore, the linear acceleration of the person's hand is given by:
a = (mg * r)/I.
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please help with these tysm
Answers
Which type of wires (copper, aluminum, or string) are ferromagnetic metals?
Answers
Answer:
Copper isn't ferromagnetic,
Aluminum isn't ferromagnetic,
String has a ferromagnetic property
So in conclusion:
The answer is strings :)
what is the oxidation number of the noble gases such as xenon and argon?
Answers
hello, may you please help me
Calculate the percentage of water of crystallisation in Na2CO3•10H2O
Answers
Answer:
62.9%. The molar mass of sodium carbonate is 106 grams per mole. Each water molecule adds another 18.0 grams per mole.
It's physical science, but I don't know I should put for it HELP!!!
Answers
(A) The relationship between current and voltage when resistance is constant represents by graph 2. Option B is correct.
(B) Relationship between current and voltage is direct. Option B is correct.
What is resistance?Resistance is the electric component that regulates the flow of current through the conductors or circuits.
Here,
From ohm's low, we have
Voltage = Current × resistance
As resistance = constant
Voltage ∝ Current
The above expression implies that Voltage becomes directly proportional to the current. So as current increases voltage also increases simultaneously [Option B is correct]. And graph between current and voltage will be a straight line passing through the origin Option B is correct.
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The voltage or potential difference across an electric circuit is directly proportional to the current flowing through the circuit. Thus, the correct options for 1 and 2 are B and B, respectively.
What is the Ohm's law?Ohm's law is the description of the relationship between two variables which are current, voltage, and a constant called resistance. The amount of steady current which passes through a large number of materials is directly proportional to the potential difference, or the voltage across the materials or electric circuit.
It can be expressed as: V = IR
where, V is the potential difference across the circuit,
I is the electric current,
and R is the resistance
As voltage is directly proportional to the current. If the voltage is increasing, then the current will also increase and if the voltage decreases then the amount of current through the circuit also decreases.
Therefore, the correct options for 1 and 2 are B and B, respectively.
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The specific gravity of an material is defined as the ratio of the density of the material to the density of water. The specific gravity of ice is 0.917, whereas that of seawater is 1.025.What fraction of an iceberg is above the surface of the water?
Answers
The fraction of the ice that lies above the water is obtained as 0.11.
What is the density?We know that the term density has to do with the ratio of the mass to the volume of an object. In this case we can see that the density has to be looked upon as a kind of property that we can use so as to obtain the identity of a given material.
In this case, we can see that what we have been given in each case is the specific gravity. However, the specific gravity is the ratio of the density of the object to the density of water.
Thus;
Density of ice = 0.917 g/cm^3
Density of sea water = 1.025 g/cm^3
Then we know that the fraction that is above the surface of the water can be obtained by the use of the formula;
Volume above = Density of liquid - Density of ice/ Density of liquid
Volume above = 1.025 - 0.917/ 1.025
= 0.11
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The magnetic field 0. 02 m from a wire is 0. 1 T. What is the magnitude of the magnetic field 0. 01 m from the same wire? 0. 01 T 0. 05 T 0. 1 T 0. 2 T.
Answers
The magnitude of the magnetic field 0.01 m from the same wire is 0.2 T.
Given to us:
Magnetic field, \(B_1 = 0.1\ T\)
Radius of wire, \(R_1 = 0.02\ m\)
To find out the magnitude of the magnetic field 0. 01 m from the same wire, we need to find out current first. we will use the formula,
\(B = \dfrac{\mu_oI }{2\pi R},\\\rn\\where,\\B= magnetic\ field\\\mu_o = 4\pi\times 10^{-7} m\cdot kg\cdot s^{-2} A^{-2}\ is\ the\ magnetic\ constant\\I= current\\R= radius\ of\ the\ wire\)
Putting the values,
\(B_1 = \dfrac{\mu_oI }{2\pi R_1},\\\rn\\\\0.1= \dfrac{4\times \pi \times 10^{-7}\times I}{2\times \pi\times0.02}\\\\I=10,000\ A\)
Now, for \(B_2\)
\(B_2 = \dfrac{\mu_oI }{2\pi R_2},\\\rn\\\\B_2= \dfrac{4\times \pi \times 10^{-7}\times 10,000}{2\times \pi\times0.01}\\\\B_2= 0.2\ T\)
Hence, the magnitude of the magnetic field 0. 01 m from the same wire is 0.2 T.
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If a door is 9800 cm wide, how many kilometers wide is it?
Answers
Answer:0.098
Explanation:
I have to finish this by 6 am today please somebody help me
Answers
State 3 advantages and 3 disadvantages of using the magnetic
particle method of defect detection.
Answers
The advantages and disadvantages may vary depending on the specific application, material, and the expertise of the personnel conducting the magnetic particle testing.
Advantages of using the magnetic particle method of defect detection:
Sensitivity to Surface and Near-Surface Defects: Magnetic particle testing is highly sensitive to surface and near-surface defects in ferromagnetic materials. It can detect cracks, fractures, and other discontinuities that may not be easily visible to the eye.
Rapid and Cost-Effective: Magnetic particle testing is a relatively fast and cost-effective method compared to other non-destructive testing techniques.
Real-Time Results: The method provides immediate results, allowing for real-time defect detection. This enables quick decision-making regarding the acceptability of the tested components or structures, leading to faster production cycles and reduced downtime.
Disadvantages of using the magnetic particle method of defect detection:
Limited to Ferromagnetic Materials: Magnetic particle testing is applicable only to ferromagnetic materials, such as iron, nickel, and their alloys. Non-ferromagnetic materials, such as aluminum or copper, cannot be effectively inspected using this method.
Surface Preparation Requirements: Proper surface preparation is crucial for effective magnetic particle testing. The surface must be cleaned thoroughly to remove dirt, grease, and other contaminants that can interfere with the test results. This additional step may require additional time and effort.
Limited Detection Depth: Magnetic particle testing is primarily suited for detecting surface and near-surface defects. It may not be as effective in detecting deeper or internal defects. Other non-destructive testing methods, such as ultrasonic testing or radiographic testing, may be more appropriate for inspecting components with deeper or internal flaws.
It's important to note that the advantages and disadvantages may vary depending on the specific application, material, and the expertise of the personnel conducting the magnetic particle testing.
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What is the difference between a primary and a secondary cell?
Answers
Primary cells are the ones which cannot be recharged and have to be discarded after the expiration of the lifetime whereas, secondary cells need to be recharged when the charge gets over. Both the types of battery are used extensively in various appliances and these cells differ in size and material used in them.
A block of mass m = 3.7 kg slides from left to right across a frictionless surface withra speed v; - 7.4 m/s. It collides in a perfectly elastic collision with a second block of
mass M that is at rest. After the collision, the 3.7-kg block reverses direction, and its new speed is vf 2.2 m/s. What is M?
8.9 kg
6.8 kg
5.2 kg
7.5 kg
Answers
Answer:
5.2 kgExplanation:
#CARRY ON LEARNING #MARK BRAINLITSLead-202 has a half-life of 53,000 years. How long will it take for 15/16 of a sample of lead-202 to decay?
106,000 years
159,000 years
212,000 years
265,000 years
(Thank you very much :L)
Answers
Answer:
it's 212,000 years
Explanation:
Apart from height above ground, what does the amount of gravitational potential energy that an object has on earth depend on?
Answers
Answer:
Mass
Explanation: the more mass the more GPE
Apart from the height above the ground, the object's mass on which the amount of gravitational potential depends.
What is gravitational potential energy?The law of gravity gives rise to the generic term for gravitational potential energy, which is equal to the effort made to defy gravity in order to move a mass to a specific location in space. It makes logical to choose the gravitational potential energy zero at an infinite distance away because, due to the inverse square nature of the gravity force, the force approaches zero for huge distances. Since gravity performs positive work as a mass approaches a planet, the gravitational potential energy is then negative. When a mass approaches a huge body, it enters a "bound state," where it is trapped until an external source of energy enables it to break free.
There is gravitational potential energy in any object raised above the earth ( or GPE). The mass and height of an object above the surface of the Earth determine how much gravitational potential energy it has.
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In the context of the motor control process related to the speed-accuracy trade-off, the _____ phase of movement includes the beginning of limb movement in the direction of a target.
Answers
In the context of the motor control process related to the speed-accuracy trade-off, the initiation phase of movement includes the beginning of limb movement in the direction of a target.
What is motor control?Motor control is the ability to regulate and coordinate motor skills to achieve a desired outcome. The central nervous system (CNS) is in charge of regulating these skills. The CNS is divided into two parts: the peripheral nervous system (PNS) and the central nervous system (CNS). Motor skills are regulated by both parts of the nervous system. The CNS, on the other hand, is more involved in higher-level motor control.
A motor control system can be divided into three stages: planning, initiation, and execution. When the central nervous system processes the desired movement, it activates the motor program in the initiation stage, which produces the motor command sent to the muscles. Movement is initiated by the initiation stage. Following that, the movement is executed to meet the task's requirements. The motor program adjusts movement by making corrections based on previous trials and feedback. Therefore, the initiation phase is critical in the context of the motor control process related to the speed-accuracy trade-off.
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which element on the periodic table has the largest atomic number?
Answers
Answer:
Oganesson
Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope 294Og have been detected.
Explanation:
Fossil fuels
?
Water cycle
Hydropower
۔۔
Photosynthesis
Sun
2
Nuclear fusion
Plants
A.
Plant life decay
Answers
Answer:
nuclear fusion plants are fossil fuels, if you are asking which of the following is a fossil fuel
Explanation:
if the distance between the thermopile sensor and the source is doubled and all other parameters remain the same, by what percentage will the thermopile reading increase or decrease?
Answers
If the distance between the thermopile sensor and the source is doubled and all other parameters remain the same, the thermopile reading will decrease by 75%.
The thermopile reading is a measure of the temperature difference between the thermopile sensor and the source. If the distance between the thermopile sensor and the source is doubled, the temperature difference between the two will decrease. This is because the heat will have to travel a longer distance to reach the thermopile sensor, resulting in a lower temperature difference. It is important to note that this calculation assumes that all other parameters remain constant.
The percentage decrease in the thermopile reading can be calculated using the inverse square law. According to this law, the intensity of the heat radiation is inversely proportional to the square of the distance between the source and the thermopile sensor. This means that if the distance is doubled, the intensity of the heat radiation will decrease by a factor of four (2 squared). Therefore, the thermopile reading will decrease by 75% (4/1) when the distance between the thermopile sensor and the source is doubled.
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In an inelastic collision, which of the following statements is always true?
[A] Kinetic energy is conserved in the collision.
[B] Momentum is conserved in the collision.
[C] After the collision, the objects always merge into one.
[D] The collision takes more that 1 second to complete.
Answers
Answer: A
Explanation:
A
23. The wavelength of a photon decreases. As a result, the photon has A. A larger momentum and a larger energy B. A smaller momentum and a smaller energy C. A smaller momentum and a larger energy D. A larger momentum and a smaller energy
Answers
The wavelength of a photon decreases. As a result, the photon has the. A larger momentum and a larger energy. correct answer is A
The wavelength of a photon is inversely proportional to its momentum, which means that as the wavelength of a photon decreases, its momentum increases. This is because the energy of a photon is proportional to its frequency, and since the speed of light is constant, the frequency of a photon is inversely proportional to its wavelength. Therefore, a photon with a shorter wavelength has a higher frequency and higher energy.
According to the de Broglie relation, the momentum of a photon is given by:
p = h/λ
where h is Planck's constant and λ is the wavelength of the photon. As the wavelength of the photon decreases, its momentum increases.
Therefore, the correct answer is: A. A larger momentum and a larger energy.
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a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
Answers
The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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Name:
9. A ball is thrown vertically in the air from rest and soars for 4.2 seconds.
If the acceleration due to gravity is 9.8 m/s², what is the final velocity
of the ball when it is caught?
Answers
The final velocity of the ball when it is caught is 20.58 m/s
What is velocity?Velocity is the rate of change of displacement.
To calculate the final velocity of the ball when it is caught, we use the formula below.
Formula:
v = u+gt............ Equation 1Where:
v = Final velocityu = Initial velocityg = Acceleration due to gravityt = TimeFrom the question,
Given:
u = 0 m/sg = 9.8 m/s²t = 4.2/2 = 2.1sSUbstitute these values into equation 1
v = 0+9.8×2.1v = 20.58 m/sHence, the final velocity of the ball when it is caught is 20.58 m/s
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give reason
2- The wheel barrow is a liver.
Answers
Answer:
In a wheelbarrow, the load is in the middle. The fulcrum is at the end where the wheels touch the ground. The effort is applied at the other end where we hold the wheelbarrow. So, it is classified as a class 2 lever.
Explanation:
Btw, you spelled liver, not lever. Anyway, hope this helped you! The answer is underlined.
fill in the blank
word bank : 9.8 m/s , accelerate , air resistance , conservation of momentum , continues , decelerate , equals , fall , freefall , gravity , laws of motion , momentum , satellites , straight line , terminal velocity , velocity & weightlessness
newtons _________ can be used to explain events in the natural world, such as how a pencil falls to the floor and how plants revolve around the sun. in the absence of air, all objects fall at the same rate, because the force of earth’s gravity causes objects to accelerate by _____ , ______ , ____ can eventually counteract the acceleration from _____. this is why a flat piece of paper falls slowly, but when the same paper is crumpled, it falls quickly. when the upward force of air resistance on an object. _____ the downward force of gravity on the object, it’s _____ stops increasing. this is called the object’s _____. _____ orbit earth because of gravity. they travel very fast, but with each meter forward that they travel, they ____ just a tiny bit due to earth’s gravity. astronauts in earth’s orbit experience _____ because they are in _____. without gravity, satellites would continue in a _____ away from earth. newton’s laws also describe what happens in collisions. for example, in a loving car, a passenger is also in motion. when the car comes to a sudden stop, the passenger _____ in motion. to protect the passenger from striking the inside of the car , seatbelts , and airbags. _____ passengers slowly. also, the _____ describes what happens in a collision. when two objects collide, the total _____ of the objects before the collision equals the total momentum of the objects after the collision.
Answers
Conservation of momentum describes what happens in a collision. When two objects collide, the total momentum of the objects before the collision equals the total momentum of the objects after the collision.
What is Collision?
A collision occurs when two or more objects come into contact with each other, and as a result, they exchange energy, momentum, and/or other physical quantities. Collisions can be either elastic or inelastic, depending on whether or not there is a loss of kinetic energy during the interaction.
Newtons laws of motion can be used to explain events in the natural world, such as how a pencil falls to the floor and how planets revolve around the sun. In the absence of air, all objects fall at the same rate, because the force of earth’s gravity causes objects to accelerate by 9.8 m/s, downwards, towards the ground. Air resistance can eventually counteract the acceleration from gravity. This is why a flat piece of paper falls slowly, but when the same paper is crumpled, it falls quickly. When the upward force of air resistance on an object equals the downward force of gravity on the object, it’s velocity stops increasing. This is called the object’s terminal velocity. Satellites orbit Earth because of gravity. They travel very fast, but with each meter forward that they travel, they decelerate just a tiny bit due to Earth’s gravity. Astronauts in Earth’s orbit experience weightlessness because they are in freefall. Without gravity, satellites would continue in a straight line away from Earth. Newton’s laws also describe what happens in collisions. For example, in a moving car, a passenger is also in motion. When the car comes to a sudden stop, the passenger continues in motion. To protect the passenger from striking the inside of the car, seatbelts, airbags, and other safety features decelerate passengers slowly.
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_____ is a property that determines the amount of current for a given source voltage, whereas a _____ is a device that controls the current in a circuit.1) Resistance, resistor2) Resistance, battery3) Resistor, resistance4) Battery, resistance
Answers
The resistance is the property of the resistors that helps to determine the amount of current flowing through the circuit with the given volatge source by the ohm's law,
\(I=\frac{V}{R}\)where I is the current, V is the volatge, R is the resistance,
On the other hand, to control the flow of current in the circuit, resistor are connected. As the resistor decrease the value of current depending upon the value of resistance of the resistor.
Hence, 1st option ( Resistance, resistor) is the correct answer.
Suppose the deer population in a region is expected to increase by 6% in the next year. If there are currently 11,650 deer living in the region, approximately how many will be living there a year from now?
Answers
Answer:
12,349 deers
Explanation:
Present population size of deer = 11,650
Expected percentage increase in population size by next year = 6%
6% of 11,650 = 6/100 x 11,650
= 699
Adding this to the present population: 11,650 + 699 = 12,349.
Hence, the total number of deer expected to be living in the population a year from now (that is, next year) is 12,349 deers.