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3 years ago

When white light goes through a prism, it undergoes refraction and the

1 answer:

8 0

Answer: The light is slowed down by the prism, but the different wavelengths of light are all slowed down a different amount by the prism.

Explanation:

What happens here is that white light passes from a medium with an specific index of refraction (air) to another medium with a different index of refraction (the material of which the prism is composed).

Then, when light passes from a medium to another, its speed changes causing the deviation of the beam of light. However, we are talking about white light that is composed of different wavelenghts. So, since the frequency of light remains costant when passing from one medium to another, the different wavelengths change as a result of the change in speed.

This was first observed by Isaac Newton in the eighteenth century, when he found out that when a beam of light from the Sun, passes trhough a prism is decomposed in many different colors.

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Small, solid pieces of material that come from rocks or living things are called ____

Over [174]

It will be sediment, that's the only thing can be in a rock and it's a living thing. Sediment is part of a rock so that's your answer this is a 7th grade question not that hard I'm in the 5th grade no officence but enjoy your answer

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4 years ago

In the nucleus ______________<br> tell cells what to do and how to change.

anyanavicka [17]

Answer:

i believe it is dna

Explanation:

if i remember correctly if the dna tells the cell what to do and how to do it

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3 years ago

Ezra (m = 20.0 kg) has a tire swing and wants to swing as high as possible. He thinks that his best option is to run as fast as

Dmitriy789 [7]

Answer:

a) $v=5.6725\,m.s^{-1}$

b) $h= 1.6420\,m$

Explanation:

Given:

mass of the body, $M=20\,kg$

mass of the tyre, $m=10\,kg$

length of hanging of tyre, $l=3.5m$

distance run by the body, $d=10m$

acceleration of the body, $a=3.62m.s^{-2}$

(a)

Using the equation of motion :

$v^2=u^2+2a.d$ ..............................(1)

where:

v=final velocity of the body

u=initial velocity of the body

here, since the body starts from rest state:

$u=0m.s^{-1}$

putting the values in eq. (1)

$v^2=0^2+2\times 3.62 \times 10$

$v=8.5088\,m.s^{-1}$

Now, the momentum of the body just before the jump onto the tyre will be:

$p=M.v$

$p=20\times 8.5088$

$p=170.1764\,kg.m.s^{-1}$

Now using the conservation on momentum, the momentum just before climbing on the tyre will be equal to the momentum just after climbing on it.

$(M+m)\times v'=p$

$(20+10)\times v'=170.1764$

$v'=5.6725\,m.s^{-1}$

(b)

Now, from the case of a swinging pendulum we know that the kinetic energy which is maximum at the vertical position of the pendulum gets completely converted into the potential energy at the maximum height.

So,

$\frac{1}{2} (M+m).v'^2=(M+m).g.h$

$\frac{1}{2} (20+10)\times 5.6725^2=(20+10)\times 9.8\times h$

$h\approx 1.6420\,m$

above the normal hanging position.

3 0

3 years ago

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

ozzi

Displacement only contain the length of movement and the direction of that movement
So you can pretty much disregard the speed.

30 to the west than 40 to the east

The displacement will be 10 km to the east

hope this helps

8 0

3 years ago

Read 2 more answers

A truck travels 6 meters in the first second of travel, 6 meters again during another second of travel, and 6 meters again durin

Alexandra [31]

D. Assuming that it doesn’t accelerate and then decelerate between seconds.

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3 years ago