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The polarization of a dielectricum P(r,t) is given by calculating the mean of the induced dipole moment of the bound charge in a small volume
An object A moving with velocity V collides with a stationary object B. After the Collision, A is moving with velocity (1/2)V and B with velocity (3/2)V.
Find a relationship between K and Rf, the Rydberg constant for hydrogen. To what property is beryllium is this connected?
A rose coloured mineral specimen is given to you for identification. It has a conchoidal fracture, no streak, and a non-metallic lustre.
There are two speakers at the front of the room. Each is outputting a 250Hz pure tone.
How much work is done by the motor in a CD player to make a CD spin, starting from rest? The CD has a diameter of 12.3 cm.
A tuning fork is sounded above a (narrow) resonating tube as in lab. The first resonant situation occurs when the water level is 0.08 m from the top of the tube
The fundamental frequency of an open-open tube is 1500 Hz when the tube is filled with 0 degree Celsius helium. What is its frequency when filled with 0 degree
The whirl is problem 2 is now connected to a motor that keeps it rotating at a constant 20.0 rpm even with the child aboard.
The speed of sound in air is about 660miles/hour. A passenger train approaches an unguarded railroad crossing at a constant speed of 60 miles/hour
Assume the Earth has a circular orbit around the sun of radius and that Mars has a circular orbit around the sun of radius .
An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water and a slender
Two speakers are driven by the same oscillator whose frequency is f. They are located a distance d from each other on a vertical pole.
This system consists of 60-lb and 20-lb blocks A and B, respectively, and 5-lb pulleys C and D that can be treated as thin disks.
A piano tuner stretches a steel piano wire with a tension of 800 N. The steel wire has a length of 0.400 m and a mass of 3.00 g.
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of .667 rev/s.
A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 through a horizontal section.
A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube.
The wavelength of a photon is 7 x10 - 7 m. Calculate the frequency of the photon. Also calculate the energy of the photon in Joules and e.V
A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly 3.85 s later.
A steel guitar string has a length of 74 cm and thickness of 0.37 mm. It is under 35N tension. Calculate the wave speed in the string
A loudspeaker is placed between two observers who are 120m apart along the line connecting them. If one observer records a sound level of 60dB
At an open-air concert a person sits at a location that is 7m and 9.10m, respectively, from speakers at each side of the stage.
A 1500-Hz sound and a 8500-Hz sound each emerge from a loudspeaker through a circular opening whose diameter is 0.30 m.
The range of human hearing is roughly from twenty Hz to twenty kilohertz. Based on these limits and a value of 343 m/s for the speed of sound