Thorium-232 decays by alpha decay. Part of the nuclear equation is shown below. Fill in the blank with a number. 232/90

When light travels from one medium to another with a different index of refraction, how is the light's frequency and wavelength

lbvjy [14]

Answer:

The frequency does not change, but the wavelength does

Explanation:

Here are the options

A. When a light wave travels from a medium with a lower index of refraction to a medium with a higher index of refraction, the frequency changes and the wavelength does not.

B. The frequency does change, but the wavelength remains unchanged.

C. Both the frequency and wavelength change.

D. When a light wave travels from a medium with a lower index of refraction to a medium with a higher index of refraction, neither the wavelength nor the frequency changes.

E. The frequency does not change, but its wavelength does.

When light goes through one medium to the next, the frequency doesn't really change seeing as frequency is dependent on wavelength and light wave velocity. And when the wavelength shifts from one medium to the next.

$n= \frac{C}{V} \ and\ \frac{\lambda_o}{\lambda_m}$

where $\lambda_o$ indicates wavelength in vacuum

$\lambda_m$ indicates wavelength in medium

n indicates refractive index

v indicates velocity of light wave

c indicates velocity of light

And wavelength is medium-dependent. Frequency Here = v $\lambda$ and shift in wavelength and velocity, not shifts in overall frequency.

Therefore the correct option is E

6 0

3 years ago

Why does nuclear energy have high efficiency

NeX [460]

Answer : The main benefits of Nuclear Energy are because it is more efficient than burning most fossil fuels than the amount of energy that is released from the uranium per gram is much more than fuels such as oil and coal. This is approximately eight thousand times more efficient.

Hope this helps you out! ☺

5 0

3 years ago

If an object accelerates from rest, with a constant acceleration of 4.4 m/s2, what will its velocity be after 28s?

Norma-Jean [14]

Answer:

123.2 m/s after 28s

Explanation:

Vi= 0 m/s

a= 4.4 m/s^2

t=28s

Vf after 28s

To find Vf use your kinematics formula Vf=Vi+at

Vi is Zero so it gets removed and the equation becomes

Vf=at

Simply Plug and Solve

Vf= 4.4(28)

Vf=123.2 m/s after 28s

6 0

3 years ago

A soccer ball of diameter d and mass m rolls up a hill without slipping, reaching a maximum height of h above the base of the hi

stich3 [128]

Answer:

Convert the units to standard units.

r = d / 2 (cm)

r = r in cm [ 1 m / 100 cm ]

m = m in g * [ 1 kg / 1000 g] = m in kg

Write the general equation for this problem.

The KE at the bottom of the hill = the PE at the top.

1/2 I w^2 + 1/2 m v^2 = mgh

I for a hollow sphere = 2/3xmxr^2

1/2 (2/3 x mr^2 x w^2) + 1/2 x m x v^2 = mgh

Now we need to relate w with v

v = w x r

w = v / r put this result in for w

1/2 (2/3 x mxr^2 z v^2 / r^2) + 1/2 m x v^2 = mgh

1/2 (2/3 x m v^2) + 1/2 x m x v^2 = mgh

1/3 m x v^2 + 1/2 mv^2 = mgh

5/6 m x v^2 = mgh Notice that the m's are all the same on both sides. They cancel.

5/6 v^2 = gx h

Solve for v

v^2 = 6/5 x g x h

Find the Rotational Kinetic Energy (KE_r)

PE - KE_translational = KE_r

mgh - 1/2 x m x v^2 = KE_r

Find the rotational rate at the bottom w

KE_r = 1/2 I x w^2

I = 2/3 m R^2

7 0

3 years ago

Gravity is greater when there is

emmainna [20.7K]

The correct answer is C. more mass and less distance between two objects.

6 0

4 years ago

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