Physics of How Things Work - PHY 1050

If the particles of the medium are vibrating to and fro in the same direction of energy transport, then the wave is a wave.

• a. Longitudinal

• b. Sound

• c. Standing

• d. Transverse

If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating

• a. From north to south only

• b. Both north and south

• c. From east to west only

• d. Both east and west

As a wave passes across a boundary into a new medium, which characteristic of the wave would NOT change?

• a. Speed

• b. Frequency

• c. Wavelength

• d. Velocity

As a pulse travels through a uniform medium, the speed of the pulse

• a. Decreases

• b. Increases

• c. Remains the same

Maximum kinetic energy of photoelectron is

• a. Directly proportional to

• b. Inversely proportional to

• c. Independent of

• d. Directly proportional to square root of

Rest mass of photon is m=h/(cλ)

• a. True

• b. False

Which of the following is not naturally occurring nuclear fuel?

• a. Uranium-238

• b. Thorium-233

• c. Plutonium-239

• d. None of these answers are correct

Which of the following may not need a moderator?

• a. Fast breeder reactor

• b. Candu reactor

• c. Homogeneous reactor

• d. Pressurized water reactor

Which is the most commonly used molten metal for cooling of nuclear reactors?

• a. Calcium

• b. Zinc

• c. Sodium

• d. Mercury

The function of a moderator is to

• a. Absorb the art of the kinetic energy of neutrons

• b. Extract the heat

• c. Reflect bac some of the neutrons

• d. Start the reactor