How long will it take for an undersea sonar pulse to travel 3 km?

Sound travels at about 1,500 m/s in seawater. How far will a sonar pulse travel in 45 s?

A string on a guitar vibrates with a frequency of 440 Hz. Two beats are heard when this string and a string on another guitar are played at the same time. What are the possible frequencies of vibration of the second string?

Determine which will change if you turn up a radio’s volume: wave velocity, intensity, pitch, amplitude, frequency, wavelength, or loudness.

Plot each point and form the triangle ABC. Verify that the triangle is a right triangle. Find its area. A = ( -2, 5); B = (1, 3); C = ( -1, 0).

Describe some differences between a gym and a concert hall that might affect the amount of reverberation in each.

Describe the range of human hearing in decibels, and the level at which sound can damage human ears.

Newton’s universal law of gravity tells us that F=G(m1m2/d2). Newton’s second law tells us that a=Fnet/m. (a) With a bit of algebraic reasoning show that your gravitational acceleration toward any planet of mass M a distance d from its center is a=GM/d2, (b) How does this equation tell you whether or not your gravitational acceleration depends on your mass?

ln complete sentences, describe why someone might expect the bond angles in methane (CH4) to be $90^{\circ}$ even though the bond angles are actually $109.5^{\circ}$

Explain how ultrasonic imaging works .

Explain how sound waves can be used to find underwater objects.

Name each property shown. 6+0=0+6

Compare and contrast écholocation and sonar.

Explain how echolocation helps bats to find food and avoid obstacles.