Exam 12: The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

If the tension on a guitar string is increased by a factor of 2,the fundamental frequency at which it vibrates is changed by what factor?

A string is strung horizontally with a fixed tension.A wave of frequency 100 Hz is sent along the string,and it has a wave speed of 100 m/s.Then a second wave,one of frequency 200 Hz,is sent along the string.What is the wave speed of the second wave?

A radar pulse is bounced off the Moon at a distance of 400,000 km.What is the time from the transmitting of the pulse until its return?

Tripling the tension in a guitar string will change its natural frequency by what factor?

What is the cause of refraction of a wave traveling from one medium to another?

A speaker designed to emit spherical sound waves is producing a sound intensity of 8 W/m² at a distance of 1 m from the speaker.What would be the intensity of this sound at a distance of 2 m from the speaker?

If the speed of a wave on a violin string is 400 m/s,what will be the speed of the wave if the tension in the string is halved?

Bats can detect small objects such as insects that are of a size approximately that of one wavelength.If bats emit a chirp at a frequency of 50 kHz,and the speed of sound waves in air is 330 m/s,what is the smallest size insect they can detect?

A musical tone,sounded on a piano,has a frequency of 820 Hz and a wavelength in air of 0.400 m.What is the wave speed?

A 100-m long high-voltage cable is suspended between two towers.The mass of the 100-m cable is 200 kg.If the tension in the cable is 20,000 N,what is the lowest frequency at which this cable can oscillate?

How many nodes does a standing wave in a string have at the frequency of the sixth harmonic?

A long string is pulled so that the tension in it increases by a factor of four.If the change in length is negligible,by what factor does the wave speed change?

A C note (f = 128 Hz)is sounded on a piano.If the length of the piano wire is 1.00 m and its mass density is 5.00 g/m,what is the tension in the wire?

If I double the mass per unit length of guitar string,its natural frequency changes by what factor?

The wave-related quantity algebraically equivalent to 1/f is:

If a guitar string has a fundamental frequency of 250 Hz,what is the frequency of its third harmonic?

Equal wavelength waves of amplitude 0.25 m and 0.10 m interfere with one another.What is the resulting minimum amplitude that can result?

Transverse waves travel with a speed of 283 m/s along a taut copper wire that has a diameter of 1.50 mm.What is the tension in the wire? (The density of copper is 8.93 g/cm³. )

A traveling wave train has wavelength 1.0 m and speed 20 m/s.Find the wave frequency.

Quadrupling both the tension in a guitar string and its mass per unit length will result in changing the wave speed in the string by what factor?