1 IBDP Physics Terms Review

A constant that expresses the energy needed to raise the temperature of 1 kg by 1 K is called:

• Specific heat capacity

• Latent heat

• Thermal conductivity

• Molar mass

What is the maximum displacement of a particle moving in a cyclic motion called?

• Amplitude

• Frequency

• Wavelength

• Velocity

What happens when a pulse is reflected back on a fixed end?

• It is reflected with a phase difference of π

• It is reflected with a phase difference of 0

• It is absorbed completely

• It is transmitted without any change

What is the frequency at which a system oscillates when it is displaced from its equilibrium position and allowed to vibrate freely without any external forces or damping?

• Natural frequency

• Resonant frequency

• Critical frequency

• Damped frequency

What does 'phase difference' refer to?

• The difference in amplitude between two waves.

• The difference in frequency between two points.

• The difference in phase for two points or the same point measured at two different instants.

• The difference in speed between two points.

• Length of the pendulum

• Mass of the pendulum

• Amplitude of the oscillation

• Frequency of the oscillation

Which harmonic is represented in this open-open tube case?

• First harmonic

• Second harmonic

• Third harmonic

• Fourth harmonic

• 2

• 1/2

• 1/4

• 4

How do rays and wavefronts relate to each other geometrically?

• Rays are parallel to wavefronts.

• Rays are perpendicular to wavefronts.

• Rays are tangent to wavefronts.

• Rays are at an angle of 45 degrees to wavefronts.

In which of the following only matters the relative speeds of the observer and emitter?

• Relativistic Doppler effect

• Doppler effect in sound

• Both effects

• Neither effect