Question

1. the law of reflection states that the

angle of incidence equals the angle of reflection
angle of reflection is twice the angle of incidence
reflected waves will always travel along the normal
reflected waves will always travel back along the same path

1. which of the following statements is not true?

refracted waves always bend toward the medium that slows them down.
a wave generally travels at a constant speed within a medium of consistent properties.
waves travel faster through shallow water than through deep water.
a wave generally travels a straight path through a medium of consistent properties.

1. which of the following statements is not true?

sound waves are longitudinal waves.
a sound wave consists of a compression pulse and a refraction pulse
there can be no sound without matter.
in a sound wave, the particles of the medium oscillate parallel to the direction of wave travel.

1. the ____ is a fluid - filled tube in the inner ear that detects vibrations with thousands of microscopic hairs.

malleus incus stapes cochlea

1. the si unit for sound wave intensity is ____ per m².

watts joules decibels hertz

1. which of these frequencies would be considered an ultrasonic sound?

10 hz 100 hz 10,000 hz 100,000 hz

1. which of the following statements regarding sound waves is not true?

sound travels through warm air faster than through cold air.
sound travels through water faster than through air.
an airplane traveling at mach 2 is traveling at twice the speed of sound.
the sound waves in front of a moving object have a lower frequency than the sound waves trailing behind it.

1. two musical notes are played, one at 330 hz and the other at 660 hz. what interval is being played?

a second a third a fourth an octave

1. ____ are softer sounds of related frequencies produced when a note is played by a musical instrument.

acoustics beats disonances overtones

1. ____ is the effect of intensity on the way the human ear perceives sound.

loudness noise pitch timbre

Explanation:

1. The law of reflection states that the angle of incidence equals the angle of reflection. This is a fundamental principle in optics.
2. Waves travel faster through deep - water than through shallow water, so the statement "Waves travel faster through shallow water than through deep water" is not true.
3. A sound wave consists of compression and rarefaction pulses, not compression and refraction pulses.
4. The cochlea is a fluid - filled tube in the inner ear that detects vibrations with microscopic hairs.
5. The SI unit for sound wave intensity is watts per square meter.
6. Ultrasonic sounds have frequencies above 20,000 Hz, so 100,000 Hz is an ultrasonic sound.
7. The sound waves in front of a moving object have a higher frequency than the sound waves trailing behind it due to the Doppler effect.
8. When one frequency is double the other, the interval is an octave. Here, 660 Hz is double 330 Hz.
9. Overtones are softer sounds of related frequencies produced when a note is played by a musical instrument.
10. Loudness is the effect of intensity on the way the human ear perceives sound.

Answer:

1. angle of incidence equals the angle of reflection
2. Waves travel faster through shallow water than through deep water
3. A sound wave consists of a compression pulse and a refraction pulse
4. cochlea
5. watts
6. 100,000 Hz
7. The sound waves in front of a moving object have a lower frequency than the sound waves trailing behind it
8. an octave
9. Overtones
10. Loudness