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Simora [160]
3 years ago
12

Me and my little sister need help!!

Physics
2 answers:
qaws [65]3 years ago
5 0
For number 8, it’s called a switch
dezoksy [38]3 years ago
4 0
#3 Is insulators
#11 is conductors
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How do scientists construct models of atoms and molecules?
9966 [12]
Mr. Roentgen's x-rays allowed scientists to measure the size of the atom. The x-rays were small enough to discern the atomic clouds. This was done by scattering x-rays from atoms and measuring their size just as Rutherford had done earlier by hitting atoms with other nuclei starting with alpha particles.
6 0
3 years ago
What do we mean by the event horizon of a black hole?
TEA [102]
<h2>Answer:</h2>

The event horizon is the surface of a black hole, it is the border of space-time in which the events on one side of it can not affect an observer on the other side.  

That is, at this border also called "point of no return", nothing can escape (not even light) and no event that occurs within it can be seen from outside.

 

5 0
4 years ago
Read 2 more answers
The change in momentum for an object is equal to
koban [17]

Answer:

We conclude that the change in momentum of a body is equal to the impulse experienced by a body.

Explanation:

Considering the equation

F • t = m • Δ v

Here,

m • Δ v is basically a change in momentum of a body which is equal to the mass of the object multiplied by the change in its velocity.

Also,

  • F • t is called the impulse of the object.

In the formula, it is clear that the impulse experienced by a body during the collision is basically a change in the momentum of the body.

In other words, the change in momentum of a body is equal to the impulse experienced by a body.

Therefore, we conclude that the change in momentum of a body is equal to the impulse experienced by a body.

4 0
3 years ago
True or False: The height from which cliff divers jump affects the velocity at which they will fall. Velocity is speed in a cert
Juli2301 [7.4K]

Answer:

the diver's speed is independent of the launch height.

Explanation:

For this exercise we must use Newton's second law

              fr - W = m a

the friction force has the general form

              fr = b v

Let's analyze this equation to find out what happens with the speed of the distant club.

When jumping, the initial speed is zero, so the friction force is zero and has an acceleration equal to the acceleration of gravity, as the speed increases the friction force increases decreasing the acceleration until it becomes zero, when it arrives at this value the velocity it has is called terminal velocity and this velocity remains fixed in relation to the trajectory.

             fr = W

             v = cte

The distance or time in which this equilibrium is reached is relatively fast, so the diver's speed is independent of the launch height.

8 0
3 years ago
Please someone help, I'm so confused?​
riadik2000 [5.3K]

Answer:

Hope i helped i tried to find it :)

Explanation:

11

1)Divergent boundaries – where two plates are moving apart.

2) Tectonic plates and Asthenosphere

3)Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys. ... Subduction zones occur where an oceanic plate meets a continental plate and is pushed underneath it. Subduction zones are marked by oceanic trenches.

4)New crust is being generated

6 0
3 years ago
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