Spring ACP #4

have the same speed

one is moving backwards

have different speeds

they can't

The minimum energy needed for electrons to escape a surface.

The minimum frequency of a photon that will cause an electron to be emitted.

The maximum kinetic energy that an emitted electron has.

The frequency that an emitted electron will have.

A The light is scattered by the second lens, preventing it from passing through.

The light is absorbed by the second lens because it is polarized at an angle perpendicular to the first lens, preventing it from passing through.

The light changes wavelength as it passes through the first lens, which is blocked by the second lens.

The second lens increases the intensity of light, preventing the light from passing through.

red

orange

yello

blue

lower

higher

the same

not enough information to answer

60 degrees

30 degrees

120 degrees

90 degrees

A

B

C

D

The metal plate is more dense than the bone and muscle, which prevents the x-rays from penetrating and being captured on the other side.

The x-rays are reflected by the metal plate and bone creating the image seen using the reflection.

The metal plate and bone absorb the x-rays as the machine captures an image of x-rays concentrated in the body.

The dense metal plate and bone allow the x-rays to penetrate, and the penetrated x-rays are captured as an image.

their total momentum is smaller

all of these

their total momentum is greater

their total momentum doesn’t change

5,000 N

10,000 Ns

10,000 N

5000 kg m/s