Exam 15: Wave Motion

Geologists use explosives to map the subterranean.The times for the reflected waves to arrive at a monitoring station can tell a great deal about the composition of the rock structures.Suppose the time it takes for a wave that is reflected from the interface of (1)and (2)is 2 s,and the time for another wave that is reflected between (2)and (3)is 2.5 s and the speed of the wave in layer (1)is 6 km/s and in layer (2)is 4 km/s,how thick is layer (2)?

A passenger car traveling due east at 53.6 m/s passes a truck traveling due east at 13.4 m/s.After the car passes,the horn on the truck is blown at a frequency of 350 Hz.The speed of sound in air is 335 m/s.The frequency heard by the driver of the car is

A longitudinal wave is distinguished from a transverse wave by the fact that in longitudinal waves

The extent to which waves diffract when they encounter an obstacle or aperture depends on

A string of mass 2.4 $\times$ 10^-3 kg and length 0.60 m vibrates transversely in such a way that its fundamental frequency is 100 Hz.The tension on this string must be approximately

The average rate at which energy is transmitted along a string depends on

When a dense fog blanket an area at night,you can often hear traffic noises coming from a distance highway or jets taking off from an airport several miles away.The reason is because

A string under tension carries a transverse wave traveling at speed v.If the tension in the string is halved and the linear density of the string is quadrupled,what is the wave speed?

Both particles and waves transfer energy from one location to another.Which of the following statements is true?

A string under tension carries a transverse wave traveling at speed v.If the tension in the string is quadrupled and the linear density of the string is doubled,what is the wave speed?

The curve that represents the speed of sound in a gas plotted against the kelvin temperature is

Use the following scenario to answer the next question. A rope of length L and linear mass density  is tied to the ceiling on one end. The other end is tied to a spring with spring constant k,and the spring is then attached to the floor,extending it by A. -The time it takes for a wave pulse to travel from the bottom of the rope to the ceiling is