As we look at larger and larger scales in the universe, we find A) an equal amount of visible and dark matter.
B) smaller and smaller masses.
C) a larger and larger percentage of the matter is dark.
D) a larger and larger percentage of the matter is visible.
E) almost exclusively visible matter.

1864+7397=8199436 thats it

Answer:0.45s

Explanation:

Trust me

Cyclotron to make 1 milligram of the isotope fluorine-18 for use a a diagnostic tool with it PET scanner. It seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.

The half-life of F-18 is 1.8 hours, so after 1.8 hours, half of the original amount of F-18 will remain. After 3.6 hours, a quarter of the original amount will remain, and so on.

At 3:00 PM (9 hours after the F-18 was made), the hospital will have

= 1/2^(9/1.8)

= 1/2^5

= 1/32

= approximately 0.03125 milligrams of F-18 remaining.

At midnight (18 hours after the F-18 was made), the hospital will have

= 1/2^(18/1.8)

= 1/2^10

= 1/1024

= approximately 0.0009765625 milligrams of F-18 remaining.

While using cyclotron, based on these calculations, it seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.

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The speed of light (c) in air is 2.99792 × 10^8 m/s, and the wavelength of visible light (λ) is 5 × 10^-7 m.

We can use the formula for the speed of light, which is:

c = λν

where ν is the frequency of the light wave.

Solving for ν, we get:

ν = c / λ

Substituting the values we have:

ν = (2.99792 × 10^8 m/s) / (5 × 10^-7 m)

ν = 5.99584 × 10^14 Hz

Therefore, the frequency of the light wave is approximately 5.99584 × 10^14 Hz.

The trip took approximately 11.74 hours.

​Given that the distance is 630 miles and the average speed is 53.6 mi/h, we can substitute these values into the formula. Using a calculator or performing the division, we find: Time≈11.74 hours. Time≈11.74hours
Therefore, the trip took approximately 11.74 hours.

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The properties of the electric fields and particle acceleration are as follows;

1. 3.75 × 10¹² electrons

2. Attracted

3. -1348.5 N

4. 1348.5 N

5. 8890 N

6. 1.044 × 10⁻⁴ C

7. The direction is downwards

8. Please find attached the required drawing created with MS Word

9. 2.87 × 10⁸ m/s²

10. Please find attached the drawing of the path of the proton created with MS Word.

An electric field is a vector that describes the electric force experienced by a charged particle at any point in space.

1. The charge of an electron is approximately -1.6 × 10^(-19) C. If the glass rod has a charge of -0.6 μC, which is equivalent to -0.6 × 10^(-6) C, then the number of electrons added to the rod is (-0.6 × 10^(-6))/(-1.6 × 10^(-19) C/electron) = 3.75 × 10^12 electrons.

2. The charges of the pith ball and the metal plate are opposite, therefore, the pith ball and metal plate are attracted to each other.

3. To calculate the force on the negatively charged object from problem 2, Coulomb's law can be used as follows;

F = k·q₁·q₂/r²

Where;

k = Coulomb's constant  (8.99 × 10⁹ N·m²/C²)

q₁ and q₂ = The charges of the two objects

r = The distance between them

Therefore;

F = (8.99×10⁹ N·m²/C²) × (10 × 10⁻⁶ C) × (-6 × 10⁻⁶ C)/(0.02 m)² = -1348.5 N

4. The force on the positively charged object from problem 2 is equal in magnitude but opposite in direction to the force on the negatively charged object, so it is 1348.5 N

5. To calculate the electric field a distance of 4.0 mm away from a -2.0 μC charge, we can use the formula; E = k × q/r², where k is Coulomb's constant, and we get;

E = (8.99 × 10⁹ N·m²/C²)×(-2×10⁻⁶ C)/(4 × 10⁻³ m)² = -1123750000 N/C

The force on a -8.0 μC charge placed at this point can be calculated using the formula; F = q·E, where q is the charge and E is the electric field.

Plugging in the values, we get; F = (-8 × 10^(-6) C) × (-1123750000 N/C) = 8990 N

6. To float your sister in the air using opposing electric charges, you need to create an electrostatic force that is equal and opposite to her weight. Her weight is; m × g = 40 kg × 9.8 m/s² = 392 N

To calculate how much charge you need to deposit both on her and on a metal plate directly below her to create this force, we can use Coulomb's Law: F = k·q₁·q₂/r², where

k = Coulomb's constant

r = The distance between her and the plate = 0.5 m

The charge on the plate = The charge on her

Therefore;

q₁ = q₂ = q
Therefore;

q = √(F × r²/k) = √(392 × (0.5)²/(8.99 × 10⁹) ≈ 1.044 × 10⁻⁴

The charge required, q ≈ 1.044 × 10⁻⁴ C

7. The direction of the force on a proton when between two plates with a vertical electric field pointing downwards would be downwards as well since protons are positively charged particles.

8. Please find attached the drawing of the electric field lines

9. The electric force on the proton can be obtained from the formula;

F = q·E

Where;

q = The charge of the proton

E = The electric field

Therefore;

The electric force on the proton is (1.6 × 10⁻¹⁹) × (3.0 N/C) = 4.8 × 10⁻¹⁹ N

The formula for the acceleration of the proton is; a = F/m

Where;

a = The acceleration of the proton

m = The mass of the proton ≈ 1.67 × 10⁻²⁷ kg

Therefore;

a = (4.8 × 10⁻¹⁹ N)/(1.67 × 10⁻²⁷ kg) ≈ 2.87 × 10⁸ m/s²

The direction of the acceleration of the proton would be, downward, which is in the same direction as the electric field

10. Please find attached drawing of the path of the proton as it travels through the plate

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Answer:

i am answering the same question 3rd time

please find the answer in the images attached.

Answer: I would stop been shy, so I could be able to say what I think to others.  I would be nicer to others, behave better. I would share more with others.

The cyclist to reach a speed of 18 m's will it take: 2.57 s

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

The formula for uniformly varied rectilinear motion (UVRM) and procedure we will use to solve this exercise is:

vf = vi + (a * t)

Where:

Applying the final velocity formula, clearing the time, and assuming the cyclist starts from rest we get:

vf = vi + (a * t)

t = (vf – vi) /a

t = (18 m/s – 0 m/s) /7.0 m/s²

t = 18 m/s/ 7.0 m/s²

t = 2.57 s

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Answer:

Instead, we see the Moon because of the Sun's light reflects back to our eyes. In fact, the Moon reflects so much of the Sun's light that it's the second brightest object in the sky after the Sun. ... These objects — other planets and stars — can usually only be seen at night when the Sun's light doesn't outshine them.

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The speed of the flute sound is 346 m/s. The speed of sound can be calculated by dividing the frequency of sound by wavelength.

The speed of sound can be calculated by dividing the frequency of sound by wavelength.

\(s = \dfrac f\lambda\\\)

Where,

\(s\)  - speed

\(f\) - frequency = 266 Hz

\(\lambda\) -  wavelength =  1.3 m

Put the values in the formula,

\(s = \dfrac {266 {\rm \ Hz}}{1. 3 {\rm \ m}}\\\\s = 346\rm \ m/s\)

Therefore, the speed of the flute sound is 346 m/s.

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Answer:

345.8 (C) meters/sec is the answer!

Explanation:

~Hope this helps!

Answer:

B

Explanation:

the roots are dig deep into small cracks and crevices, and as they grow they pry the rock apart. look close and you will see the roots of the tree.

Answer:

organ is larger cell..............

Answer:

organ

Explanation:

The production function will have constant returns to scale if 2αβ = 1

Constant returns to scale (CRS) implies that if all inputs increase by a factor of λ, the output increases by λ as well. The requirement for constant returns to scale (CRS) in a Cobb-Douglas production function with a new input factor is given by the sum of exponents on all variables equal to 1.

In this case, Y = AKαLβMγ.

Thus, we have that α + β + γ = 1 for constant returns to scale in K, L, and M, because the sum of the exponents is 1.

If the sum of the exponents is less than 1, it indicates decreasing returns to scale. If the sum of the exponents is greater than 1, it indicates increasing returns to scale. If we take γ = 0, we obtain the production function used in class, which is Y = AKαLβ, thus α + β = 1 for constant returns to scale in K and L.

When γ = 0, the answer we get is consistent with what we learned in class. Now, we consider the constant elasticity of substitution (CES) technology, where Y = [aKα + bLα]β. The production function will have constant returns to scale (CRS) in K and L if the sum of the exponents of K and L is equal to 1.

Therefore, αβ + αβ = 1, implying 2αβ = 1.

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As you're applying force to the car, the mud which is a sinking surface would but you in the same place as the car is. The car is stuck in the mud and sunk to point where it cannot be pulled out unless an outside force interferes. When you apply force into the car and try to push it out, you would be put in the same situation. You would be experiencing friction which is an opposing force, in this problem, a simple machine such as a pulley would be helpful as it can lift the car from the outside. The car would act as a load and someone or some type of machine can use force to pick the car out of the mud. But if you were to try to push it out of the mud, you would just sink as the force applied would only put you in the same situation as the car, overall resulting in both beings (objects - car, human - "you" POV) being stuck in the same conumdrum.

Answer:

See below

Explanation:

Gravity will pull you down as you stand in the mud.

Additionally , if you do not push exactly horizontally ......like you push UP some , the equal and opposite force will push YOU down into the mud.

  This would be like picking up a weight while you are standing there

      F = ma  will be greater and you will get muddier !

Answer:

Speed = 0.5 m/s

Explanation:

Time = 3min = 180 seconds

Distance = 90 meters

\(Speed =\frac{Distance}{Time} \\\\Speed= \frac{90}{180} \\\\Speed = \frac{1}{2} \\\\Speed =0.5\:m/s\)

Answer:ttttrsc

Explanation:eeeeee

Answer:

B

Explanation:

Density is about how closely compact molecules are. (^-^)

Energy is being produced in two different ways.

1st. when you run, exercise, etc allot of energy is being produced from your body in form of heat.

2nd. energy which is in form of coal, electricity, gas etc.

Definition: the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.

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The voltage across the 2800-Ω resistor is approximately 9.88 V.

To find the voltage across the 2800-Ω resistor when it is connected in series with a 600-Ω resistor and a 12-V battery, follow these steps:

1. Calculate the total resistance (R_total) in the series circuit:
R_total = R1 + R2 = 600 Ω + 2800 Ω = 3400 Ω

2. Calculate the total current (I_total) flowing through the circuit using Ohm's Law:
I_total = Voltage / R_total = 12 V / 3400 Ω ≈ 0.00353 A

3. Calculate the voltage across the 2800-Ω resistor (V2) using Ohm's Law:
V2 = I_total ×R2 = 0.00353 A ×2800 Ω ≈ 9.88 V

The voltage across the 2800-Ω resistor is approximately 9.88 V.

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The dots in an electron dot diagram represent electrons.

The bonding between atoms in a molecule as well as any lone pairs of electrons that may be present are depicted in Lewis structures, also referred to as electron dot structures. Any molecule with a covalent link, as well as coordination compounds, can have a Lewis structure.

Lewis structures use the chemical symbol for each atom to show where it is located within the molecule's structure. Atoms that are joined together are separated by lines (pairs of dots can be used instead of lines).

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Answer:

Respect for elders, Honesty, and Reservedness

Explanation:

As a child, due to the nature of my father's job, I grew up in a barrack where people of different ethnic and cultural backgrounds lived. My father is a highly disciplined man who give great values to behavioral values such as respect, honesty and reservedness. His soldier friends who are equally disciplined instill the same values in their wards. They taught us the importance of possessing these great attributes and ensured that there was compliance.

The upbringing I had as a child made me see these three attributes as a lifestyle and they now have an enormous effect in my daily life.

Answer:

Because I was raised using Authoritative parenting I notice some behavioral effects in myself such as brutal honesty, and heavy loyalty.

Explanation:

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The distance traveled by bus for the given time interval and speed will be 9.99 km.

Distance is a numerical representation of the distance between two objects or locations.

The distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.

The given data in the problem is;

t is the time period = 20 minutes = 0.33 hour  ( 1 hour = 60 minute)

V is the velocity = 30 km/h

D is the distance traveled

The distance traveled is found as;

Distance = velocity × time

D = V × t

D= (30 km/h) × 0.333 h

D = 9.99 km

Hence the distances traveled by bus for the given time interval and speed will be 9.99 km.

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Sound wave is the wave produced when two objects are made to struck each other.

A wave is the form of ups and down line in sinusoidal wave which undergoes compression and rarefaction when striked by any obstruction.

The vibrations are caused by the disturbance of any object. These vibrations when produce sound along with vibrations.

For example: when a bell is rang, marching on the bridge by soldiers, stretching the spring about the equilibrium.

Thus, sound wave is the wave produced when two objects are made to struck each other.

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Answer: 6,277,647m

Explanation:

Radius of Earth = 6400km

To calculate the gravitational acceleration of a planet, we use the following formula:

g = mG/r^2

Gravitational acceleration is equal to the mass of the planet multiplied by the gravitational constant all divided by the radius of the planet squared.

We already know what the gravitational acceleration will be, 2.45m/s^2.

So, 2.45m/s^2 = mG/r^2

the mass of the earth is equal to 5.9*10^24.

And the gravitational constant is equal to 6.67408 * 10^-11.

We don't know the radius though.

2.45m/s^2 = 5.9*10^24 * 6.67408 * 10^-11 divided by r^2

2.45m/s^2 = 3.93 * 10^14 divide by r^2

Now, we can cross-multiply.

2.45m/s^2 * r^2 = 3.93 * 10^14

divide r^2 from both sides.

r^2 = 3.93 * 10^14 divided by 2.45m/s^2

r^2 = 1.6*10^14.

Now, take the square root of both sides.

r = 12,677,647 meters from the center of the Earth.

To calculate the height from the surface of the Earth, we need to subtract r by the Earth's radius.

That will be 12,677,647-6.400.000m = 6,277,647m from the surface of Earth.

Answer:

1200

Explanation:

a = 1.5 m/s2

F = 1800N

M =?

F = Ma

M = F/a = 1800/1.5 = 1200Kg

Answer:

45.31 J

Explanation:

We are given that

Mass of baseball , m=0.145 kg

Initial velocity, u=0

Final velocity, v=25 m/s

We have to find the work done on the baseball to bring it from rest to 25 m/s

We know that

Work done = Change in kinetic energy

Work done, W=\(\frac{1}{2}m(v^2-u^2)\)

Using the formula

Work done, W\(=\frac{1}{2}(0.145)((25)^2-0)\)

Work done=\(\frac{1}{2}(0.145)(625)\)

Work done, W=45.31 J

Hence, the work done on the baseball to bring it from rest to 25 m/s

=45.31 J

False. The Clean Water Act can still be applicable to ponds that are not adjacent to open water if they are considered "waters of the United States" under the act, which can include wetlands and other bodies of water that are connected to navigable waters.

The Clean Water Act (CWA) aims to protect all navigable waters in the United States, including ponds that may not be directly adjacent to open water. The CWA regulates the discharge of pollutants and requires permits for certain activities that could potentially harm water quality. Even if a pond is not adjacent to open water, it may still be protected under the CWA if it has a significant connection to other waters, such as through underground or surface water flow.

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Iron is made up of atoms, the thermal expansion of solid iron is caused by C. the breaking of bonds between the iron atoms.

Thermal expansion  can be described as the tendency of matter to change in shape, volume, and area in response to a change in temperature.

It should be noted that the temperature  can be seen as a monotonic function of the average molecular kinetic energy of a substance , however When a substance is heated, the Kinetic energy that is present in the molecules will increases then they can start to vibrating more and usually maintain a greater average separation and this process will result to expoansion because bond will be broken.

Therefore, option C is correct.

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The density of the unknown liquid is 997 kg/m³.

To Calculate the volume of the solid aluminum cylinder using the weight and density provided.
Formula: Volume = Weight / (Density * gravity), where gravity is approximately 9.81 m/s².
Volume = 0.66 N / (2700 kg/m³ * 9.81 m/s²) ≈ 2.45 x 10⁻⁵ m³
Calculate the buoyant force acting on the cylinder when immersed in the liquid.
Buoyant force = Weight in air - Apparent weight in liquid
Buoyant force = 0.66 N - 0.354 N = 0.306 N
Use the buoyant force to find the density of the unknown liquid.
Formula: Buoyant force = Liquid density * Volume * gravity
Liquid density = Buoyant force / (Volume * gravity)
Liquid density = 0.306 N / (2.45 x 10⁻⁵ m³ * 9.81 m/s²) ≈ 997 kg/m³

Hence,  Using this buoyant force, we determined the density of the unknown liquid to be 997 kg/m³.

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Answer:

b.

Explanation:

Mitosis is important for growth and development  of living organisms.

The major importance of mitosis is growth and development. The correct option is B.

Mitosis is the method by which a cell replicates as well as then segregates its chromosomes, and generates two identical nuclei in order to divide.

Mitosis is basically followed by the equal division of the cell's contents into two daughter cells with identical genomes.

Mitosis occurs in the following stages:

One cell divides once during mitosis to form two identical cells. Mitosis is primarily responsible for cell growth and replacement.

Thus, the correct option is B.

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