Exam 15: Waves

A stretched string with a mass of 50 g and a length of 120 cm is placed under a tension of 230 N.How much power must be supplied to the string to generate traveling waves that have a frequency of 90 Hz and an amplitude of 7.0 cm?

A wire of uniform linear mass density hangs from the ceiling.It takes 1 s for a pulse to travel the length of the wire.How long is the wire?

The vertical displacement due to a traveling wave moving horizontally is given by y(x,t)= 5.4 cos (0.4(rad/cm)x - 45(rad/s)t (sec))where x and y are in centimeters.The horizontal distance between the points whose phase differs by $\pi$ /3 rad is

A string is stretched between two fixed points.A standing wave is set up on the string.The string is vibrating in its fifth harmonic mode.Which one of the following statements is true?

I sit in a boat on a lake and watch water waves pass.I count 1.5 s for the wave crests to travel the length of my (stationary)4.5-m long boat.The time between successive crests is 0.5 s.What is the wavelength of the waves?

Two adjacent frequencies of transverse standing waves on a string held fixed at both ends are 1440 Hz and 1560 Hz.What is the fundamental frequency of the transverse standing waves on this string?

A standing wave is set up on a 3-m long string with a vibrational frequency of 100 Hz.Which of the following is a possible velocity for the wave?

An earthquake creates a wave in a canal.If the canal is 3.2 km long and 210 m deep,what is the speed of the waves created by the earthquake in the water?

A string of mass 3 g and length 1 m can carry a wave of 20 mW power.The amplitude of the wave is 3.25 mm.What is the period of oscillation if the tension applied to the string is 42 N?

You increase the tension in a string to double its current value.This results in increasing the speed of the wave in the string by a factor of

The wave speed in a wire stretched with a tension of 250 N is 240 m/s and the radius of the wire is 0.50mm.What is the density of the wire?

A wave of amplitude 30 cm,wavelength of 0.75 m and frequency 20 Hz.What is its speed?

Which of the following functions is not a solution to the Wave Equation?

Two wires made of the same material have same length and the tension.Their diameters are 1 mm (wire 1)and 0.5 mm (wire 2).The ratio f₂/f₁ of their fundamental frequencies is

How long does it take for light to travel from the Sun to Earth? (Hint: The distance between Earth and Sun is 148 Million km,the speed of light is 300,000 km/s.)

The first harmonic of a standing wave is set up in a 3-m string with a mass of 100 g and a tension of 100 N.What is the frequency of the harmonic?

A horizontal transverse standing wave has a wavelength of 12.0 cm.What is the horizontal distance between adjacent nodes and anti-nodes?

A wave of amplitude 30 cm travels with a velocity of 10 m/s and a frequency of 10 Hz.What is its wavelength?

Seismic waves created by earthquakes travel both as longitudinal or compression waves and as transverse waves.These waves travel

You increase the tension in a string to four times its current value.This results in increasing the speed of the wave in the string by a factor of