CAPE Unit 1 Revision Quiz 2

Which of the following methods of heat transfer occurs as a consequence of a change in density?

• Radiation

• Convection

• Conduction

• Evaporation

How much intensity change in dB will take place with an increase in intensity from 1 m Wm ^{– 2} to 100 mW m ^{– 2}?

• 2 dB

• 3 dB

• 20 dB

• 30 dB

A mass of 6.4 μg is equal to

• 6.4 x 10 ^{– 3} kg

• 6.4 x 10 ^{– 6} kg

• 6.4 x 10 ^{– 9} kg

• 6.4 x 10 ^{– 12} kg

Two rocks are spun around in circular paths at the ends of strings of equal length. What quantity MUST be the same for both rocks if the tension in the strings are equal?

• Speed

• Acceleration

• Mass

• Kinetic energy

The magnitude of the threshold of hearing at I kHz is

• 10 ^{– 8} W m ^{– 2}

• 10 ^{– 10} W m ^{– 2}

• 10 ^{– 11} W m ^{– 2}

• 10 ^{– 12} W m ^{– 2}

Which of the following eye defects is corrected by a cylindrical lens?

• Cataracts

• Short sight

• Long sight

• Astigmatism

Which of the following is NOT an assumption of the kinetic theory of gases?

• A gas consists of a large number of molecules.

• The gas molecules are in constant, random motion.

• The gas molecules collide inelastically with each other.

• The duration of a collision is negligible when compared to the time interval between collisions.

Two bodies when in thermal equilibrium will have the same

• potential energy

• pressure

• kinetic energy

• temperature

Which of the following quantities does NOT remain constant when a particle moves in simple harmonic motion?

• Force

• Total energy

• Amplitude

• Angular frequency

The power of a lens of focal length 15 cm is

• 0.067 D

• 0.67 D

• 6.7 D

• 67 D