Questions from College Physics

Q: A stone is dropped from rest into a well. The sound

A stone is dropped from rest into a well. The sound of the splash is heard exactly 2.00 s later. Find the depth of the well if the air temperature is 10.0°C.

Q: A student stands several meters in front of a smooth reflecting wall

A student stands several meters in front of a smooth reflecting wall, holding a board on which a wire is fixed at each end. The wire, vibrating in its third harmonic, is 75.0 cm long, has a mass of 2....

Q: By proper excitation, it is possible to produce both longitudinal and

By proper excitation, it is possible to produce both longitudinal and transverse waves in a long metal rod. In a particular case, the rod is 1.50 m long and 0.200 cm in radius and has a mass of 50.9 g...

Q: A 0.500 - m - long brass pipe open at

A 0.500 - m - long brass pipe open at both ends has a fundamental frequency of 350. Hz. (a) Determine the temperature of the air in the pipe. (b) If the temperature is increased by 20.0°C, what is the...

Q: A hammer strikes one end of a thick steel rail of length

A hammer strikes one end of a thick steel rail of length 8.50 m. A microphone located at the opposite end of the rail detects two pulses of sound, one that travels through the air and a longitudinal w...

Q: A 7.50 - nC charge is located 1.80

A 7.50 - nC charge is located 1.80 m from a 4.20 - nC charge. (a) Find the magnitude of the electrostatic force that one particle exerts on the other. (b) Is the force attractive or repulsive?

Q: Calculate the magnitude and direction of the Coulomb force on each of

Calculate the magnitude and direction of the Coulomb force on each of the three charges shown in Figure P15.10. Figure P15.10:

Q: At time t = 0, a vessel contains a mixture of

At time t = 0, a vessel contains a mixture of 10. kg of water and an unknown mass of ice in equilibrium at 0°C. The temperature of the mixture is measured over a period of an hour, with the following...

Q: Three charges are arranged as shown in Figure P15.11.

Three charges are arranged as shown in Figure P15.11. Find the magnitude and direction of the electrostatic force on the charge at the origin. Figure P15.11:

Q: A positive charge q1 = 2.70 μC on a frictionless

A positive charge q1 = 2.70 μC on a frictionless horizontal surface is attached to a spring of force constant k as in Figure P15.12. When a charge of q2 = -8.60 μC is placed 9.50 cm away from the posi...