A student creates a model by placing raisins in bread dough and allowing the dough to rise for several hours. The student sketches the model before and after the dough rises.



The student claims that the model accurately describes the motion of the galaxies in the universe. What evidence from the model supports the student’s claim?


As the dough rises, the size of the raisins increases, resembling the expansion of the galaxies.
As the dough rises, the size of the raisins increases, resembling the expansion of the galaxies.
As the dough rises, the size of the raisins increases, resembling the expansion of the galaxies.

As the dough rises, the distance between the raisins decreases, indicating that the galaxies will collide.
As the dough rises, the distance between the raisins decreases, indicating that the galaxies will collide.

As the dough rises, the size of the raisins decreases, resembling the emission of light from stars.
As the dough rises, the size of the raisins decreases, resembling the emission of light from stars.

As the dough rises, the distance between the raisins increases, indicating that the galaxies are moving apart.

Answer: The mesocyclone

Explanation: The unsaturated air, if moved upward, will be cooler than the surrounding air and it will sink. ... This convective action (that is, the circulation of air as a result of heat transfer) produces the huge clouds commonly associated with thunderstorms and tornadoes.

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Answer:

Explanation:

Given;

initial velocity of the rock, u = 15.5 m/s

at maximum height the final velocity of the rock, v = 0

The height risen by the rock is calculated as follows;

v² = u² - 2gh

0 = u² - 2gh

2gh = u²

h = u² / 2g

h = (15.5²) / (2 x 9.8)

h = 12.26 m

The time spent in air by the rock is known as time of flight, which is calculated as follows;

v = u - gt

0 = u - gt

gt = u

t = u/g

where;

t is the time to reach maximum height

t = 15.5 / 9.8

t = 1.58 s

Time of flight (time spent in air) is calculated as;

T = 2t

T = 2 x 1.58 s

T = 3.16 s.

Answer:

Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!

Answer:

b. passes through the principal focal point.

Explanation:

Light wave can be defined as an electromagnetic wave that do not require a medium of propagation for it to travel through a vacuum of space where no particles exist.

A lens can be defined as a transparent optical instrument that refracts rays of light to produce a real image.

Basically, there are two (2) main types of lens and these includes;

I. Diverging (concave) lens.

II. Converging (convex) lens.

A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image. This type of lens is usually thin at the lower and upper edges and thick across the middle.

For a converging lens, a ray arriving parallel to the optic axis passes through the principal focal point.

The correct option is b. passes through the principal focal point.

The following information should be considered:

Basically, there are two (2) main types of lens:

A converging lens refers to a type of lens that typically causes parallel rays of light with respect to its principal axis to come to a focus (converge) and form a real image.

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Answer:

The weight of the object X is approximately 3.262 N (Acting downwards)

The weight of the object Y is approximately 8.733 N (Acting downwards)

Explanation:

The question can be answered based on the principle of equilibrium of forces  

The given parameters are;

The weight of Z = 12 N (Acting downwards)

The weight of the pulleys = Negligible

From the diagram;

The tension in the in the string attached to object Z = The weight of object Z = 12 N

The tension in the in the string attached to object X = The weight of the object X  

The tension in the in the string attached to object Y = The weight of the object Y

Given that the forces are in equilibrium, we have;

The sum of vertical forces acting at a point, [tex]\Sigma F_y[/tex] = 0

Therefore;

[tex]T_{1y} + T_{2y} + T_{3y} = 0[/tex]

[tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex]

Where;

[tex]T_{1y}[/tex]  = The weight of object Z = 12 N

[tex]T_{1y}[/tex]  = 12 N

[tex]T_{2y}[/tex] = The vertical component of tension, T₂ = T₂ × sin(24°)

∴  [tex]T_{2y}[/tex] = T₂ × sin(156°)

Similarly;

[tex]T_{3y}[/tex] = T₃ × sin(50°)

From [tex]T_{1y} = -( T_{2y} + T_{3y} )[/tex], and [tex]T_{1y}[/tex]  = 12 N, we have;

12 N = -(T₂ × sin(156°) + T₃ × sin(50°))...(1)

Given that the forces are in equilibrium, we also have that the sum of vertical forces acting at a point, ∑Fₓ = 0

Therefore at point B, we have;

T₁ₓ + T₂ₓ + T₃ₓ = 0

The tension force, T₁, only has a vertical component, therefore;

∴ T₁ₓ = 0

∴ T₂ₓ + T₃ₓ = 0

T₂ₓ = -T₃ₓ

T₂ₓ =  T₂ × cos(156°)

T₃ₓ = T₃ × cos(50°)

From T₂ₓ = -T₃ₓ, we have;

T₂ × cos(156°) = - T₃ × cos(50°)...(2)

Making T₃ the subject of equation (1) and (2) gives;

Making T₃ the subject of equation in equation (1), we get;

12 = -(T₂ × sin(156°) + T₃ × sin(50°))

∴ T₃ = (-12 - T₂ × sin(156°))/(sin(50°))

Making T₃ the subject of equation in equation (2), we get;

T₂ × cos(156°) = - T₃ × cos(50°)

∴ T₃ = T₂ × cos(156°)/(-cos(50°))

Equating both values of T₃ gives;

(-12 - T₂ × sin(156°))/(sin(50°)) = T₂ × cos(156°)/(-cos(50°))

-12/(sin(50°)) = T₂ × cos(156°)/(-cos(50°)) + T₂ × sin(156°)/(sin(50°))

∴ T₂ = -12/(sin(50°))/((cos(156°)/(-cos(50°)) + sin(156°)/(sin(50°))) ≈ -8.02429905283

∴ T₂ ≈ -8.02 N

From T₃ = T₂ × cos(156°)/(-cos(50°)), we have;

T₃ = -8.02× cos(156°)/(-cos(50°)) = -11.3982199717

∴ T₃ ≈ -11.4 N

The weight of the object X = -T₂ × sin(156°)

∴ The weight of the object X ≈ -(-8.02 × sin(156°)) = 3.262 N

The weight of the object X ≈ 3.262 N (Acting downwards)

The weight of the object Y = -(T₃ × sin(50°))

∴ The weight of the object Y = -(-11.4 × sin(50°)) ≈ 8.733 N

The weight of the object Y ≈ 8.733 N (Acting downwards)

Answer:

В. An object with mechanical energy is always able to perform work.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Hence, the true statement is that an object with mechanical energy is always able to perform work.

Answer:

B

Explanation:

Answer:

В. An object with mechanical energy is always able to perform work.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Hence, the true statement is that an object with mechanical energy is always able to perform work.

Answer:

G.P.E = 368.3

Explanation:

Given the following data;

Mass = 2.63kg

Height, h = 14.29m

We know that acceleration due to gravity is equal to 9.8m/s²

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

[tex] G.P.E = mgh[/tex]

Where;

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

[tex] G.P.E = 2.63*9.8*14.29 [/tex]

G.P.E = 368.3

Note: the unit of gravitational potential energy is Joules.

Answer:

It has producer-consumer relationship with sugar-maple trees because it gets food from the trees.

Explanation:

The mourning bird is primarily a seed eater and not an insect eater. Since it is a seed eater, it will directly from the sugar-maple tree which is the producer.

In an ecosystem, the producers are plants which can trap energy directly from the sun during photosynthesis. This energy is passed on to the consumers.

Hence, the mourning bird has producer-consumer relationship with sugar-maple trees because it gets food from the trees.

Answer:

c

Explanation:

Answer:

5mu = carry a vaulting pole ( 12 m/s) Also

fast

All the vaulter's kinetic energy is transformed into gravitational potential energy. 7.35m is the that person's height.

Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. After work is completed, energy is transferred to the object, and the object moves at a new constant speed.

The two most important factors influencing kinetic energy are mass and speed. Because an object's motion is determined by its velocity as well as its mass, though velocity is th

Given:

v = 12m/s

g = 9.8 m/s²

Kinetic energy = potential energy

K.E = P.E

1/2 mv² = mgH

H = v² /2g

H = 7.35m

Thus, 7.35m is the that person's height.

To learn more about the kinetic energy, follow the link;

https://brainly.com/question/15764612

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Hello,

A roller coaster is moving 10 m/s and a mass of 7 kg. The roller coaster has kinetic  energy.

✔ We have : Ek = 1/2m x v²; with Ek in J, m in kg and v in m/s

Answer:

Gravity is a non-contact force that was observed famously by Sir Isaac Newton, who watched an apple falling from a tree to the ground. ... Newton was the first to realise that gravity existed in space and it was the force which holds the Moon in orbit around the Earth and planets in orbit around the Sun.

Answer:

Answer:

Option C. The force between them would be 4 times larger than with the

initial masses.

Explanation:

To know which option is correct, we shall determine the force of attraction between the two masses when their masses are doubled. This can be obtained as follow:

From:

F = GMₐM₆/ r²

Keeping G/r² constant, we have

F₁ = MₐM₆

Let the initial mass of both objects to be m

F₁ = MₐM₆

F₁ = m × m

F₁ = m²

Next, let the masses of both objects doubles i.e 2m

F₂ = MₐM₆

F₂ = 2m × 2m

F₂ = 4m²

Compare the initial and final force

Initial force (F₁) = m²

Final (F₂) = 4m²

F₂ / F₁ = 4m² / m²

F₂ / F₁ = 4

F₂ = 4F₁ = 4m²

From the above illustrations, we can see that when the mass of both objects doubles, the force between them would be 4 times larger than with the

initial masses.

Thus, option C gives the correct answer to the question.

Answer:

what i commented.

Explanation:

Explanation:

Given:

Speed of sound = 1400 m/s

Total time taken = 0.4 seconds

To find:

The depth of water

Solution:

As it take 0.4 seconds for the burst to reach the seabed and return (both ways), we can deduce that it takes 0.2 seconds to reach the seabed (one way).

This is because the speed of sound is a constant.

Now, to find the depth, we use the equation

Speed = Distance/Time

Here, we know the values of speed (1400 m/s) and time (0.2 seconds). Distance is the depth of the water, which we need to find. Let the distance be x.

Therefore

1400 = x/0.2

x = 1400 * 0.2

x = 280 m

We get the depth as 280 metres.

Feel free to ask me if you didn't understand any part.

Hope this helps! :D

Answer:

The force used

Explanation:

This has to be because of the force used. Both Susie and her younger brother might have hit the ball with the same velocity, but they surely couldn't have hit it with the same force. The force with which Susie hurts it is heavier than that with which her younger brother hits it, and as such, Susie gets to fall down more pins than her brother will be able to. The ball has to have a lot of force in it for it to be able to knock off all the pins there. So basically, the more the force, the higher it's chances of hitting all the pins

Answer:

It can be seen from the operation of pin-hole camera, formation of shadows and eclipse.

Explanation:

The phenomenon of light traveling in a straight line is known as rectilinear propagation of light.

One this evidence can be seen from the operation of pin-hole camera, which depends on rectilinear propagation of light

Also two natural effects that result from the rectilinear propagation of light are the formation of Shadows and Eclipse.  

Answer:

the average current is 8000 A

Explanation:

I got it answered by an expert

Answer:

1) Similarity:

1. diatomic molecules.

2. nonpolar covalent bond.

3. gaseus state at room temperature.

4. very reactive, with high electronegativity.

Answer:

a. The sound will travel at the speed to both Jill and Jack

b. Jack

Explanation:

a. Doppler effect describes how the frequency of a sound wave changes with regards to an observer that has relative motion to the sound source;

The Doppler effect is given by the following formula;

For a sound that is moving away, as observed by Jill, we have;

[tex]f' = \dfrac{(v - v_0)}{(v + v_s)} \cdot f = \dfrac{v }{(v + v_s)} \cdot f[/tex]

For approaching sound, as observed by Jack, we have;

[tex]f' = \dfrac{(v + v_0)}{(v - v_s)} \cdot f = \dfrac{v }{(v - v_s)} \cdot f[/tex]

Where;

f = The sound wave's actual frequency

f' = The frequency of the moving sound to the observer

v = The speed of the sound wave

v₀ = The observer's velocity = 0

[tex]v_s[/tex] = The velocity of the source (the automobile honking) of the sound wave

From the above equation, we have that the speed of sound, 'v', is the same to both the source, and the observer although the frequency, and therefore, the wavelength of the sound alternatively increases or decreases

b. From the Doppler effect equation, the person who will hear the highest frequency is given by the formula for the frequency when the sound is approaching the observer, which has the lower denominator

Therefore, given that the automobile is travelling towards Jack, jack will hear the higher frequency

Answer:

he relative velocity (also or ) is the velocity of an object or observer B in the rest frame of another object or observer A.

Answer:

a doubling of the height will result in a doubling of the gravitational potential energy.

Explanation:

Answer:

Golf

Explanation:

Golf is NOT considered an invasion game or sport

Answer:

people do not click that guys link its to get your ip check his profile all his answers are like that DONT CLICK IT

Explanation: