Questions from College Physics

Q: A generator supplies an average power of 12 MW through a transmission

A generator supplies an average power of 12 MW through a transmission line that has a resistance of 10.0 Ω. What is the power loss in the transmission line if the rms line voltage / is...

Q: For a nonrelativistic particle of mass m, show that K =

For a nonrelativistic particle of mass m, show that K = p2/(2m). [Hint: Start with the nonrelativistic expressions for kinetic energy K and momentum p.]

Q: (a) Calculate the rms current drawn by the load in

(a) Calculate the rms current drawn by the load in the figure with Problem 88 if / kV and the average power supplied by the generator is 12 MW. (b) Suppose that the average power supplied by the gen...

Q: In a beam of electrons used in a diffraction experiment, each

In a beam of electrons used in a diffraction experiment, each electron is accelerated to a kinetic energy of 150 keV. (a) Are the electrons relativistic? Explain. (b) How fast are the electrons movi...

Q: Transformers are often rated in terms of kilovoltamps. A pole on

Transformers are often rated in terms of kilovoltamps. A pole on a residential street has a transformer rated at 35 kVA to serve four homes on the street. (a) If each home has a fuse that limits the...

Q: Derive the energy-momentum relation / Start by squaring

Derive the energy-momentum relation Start by squaring the definition of total energy (E = K + E0) and then use the relativistic expressions for momentum and kinetic energy [Eqs. (26-15) and (26-18)]....

Q: A certain circuit has a 25 Ω resistor and one other component

A certain circuit has a 25 Ω resistor and one other component in series with a 12 V (rms) sinusoidal ac source. The rms current in the circuit is 0.317 A when the frequency is 150 Hz and increases by...

Q: A student, looking toward his fourth-floor dormitory window,

A student, looking toward his fourth-floor dormitory window, sees a flowerpot with nasturtiums (originally on a window sill above) pass his 1.0 m high window in 0.051 s. The distance between floors in...

Q: Starting with the energy-momentum relation / and

Starting with the energy-momentum relation and the definition of total energy, show that (pc)2 = K2 + 2KE0 [Eq. (26-23)].

Q: A 40.0 mH inductor, with internal resistance of 30

A 40.0 mH inductor, with internal resistance of 30.0 Ω, is connected to an ac source (a) What is the impedance of the inductor in the circuit? (b) What are the peak and rms voltages acros...