Chapter 19 Review Questions

Doubling the mass of a simple pendulum undergoing small oscillations does what to the period of the pendulum?

(a) cuts it in half

(b) increases it by the square of 2

(c) nothing

(d) doubles it

What dictates the frequency of a sound wave?

(a) wavelength

(b) medium

(c) source of the sound

(d) speed

(e) amplitude

What determines the speed of a wave?

(a) the frequency

(b) the wavelength

(c) the amplitude

(d) the period

(e) the medium of transmission

A skipper on a boat notices wave crests passing his anchor chain every 5 seconds. If the wave crests are 15 m apart, what is the speed of the water waves in m/s?

(a) 5

(b) 15

(c) 75

(d) 10

(e) 3

For a medium transmitting a longitudinal wave, the areas of the medium where the density of the medium is temporarily increased are called

(a) rarefactions

(b) compressions

(c) density holes

When you move away from a fixed source of sound, the frequency of the sound you hear

(a) is greater than what the source emits

(b) is less than what the source emits

(c) is the same as what the source emits

Sonic booms from a plane are produced

(a) because the plane breaks through the sound barrier

(b) when the plane reaches the speed of sound

(c) by the plane traveling faster than the speed of sound

(d) by the plane traveling slower than the speed of sound