Questions from Modern Physics

Q: Three charges are placed as shown in Fig. P21.95

Three charges are placed as shown in Fig. P21.95. The magnitude of q1 is 2.00 µC, but its sign and the value of the charge q2 are not known. Charge q3 is +4.00 µC, and the net force

Q: Two charges are placed as shown in Fig. P21.96

Two charges are placed as shown in Fig. P21.96. The magnitude of q1 is 3.00 µC, but its sign and the value of the charge q2 are not known. The direction of the net electric field

Q: Two thin rods of length L lie along the x-axis

Two thin rods of length L lie along the x-axis, one between x = 1 2 a and x = 1 2 a + L and the other between x = - 1 2 a and x = - 1 2 a - L. Each rod has positive charge Q distributed uniformly...

Q: Consider a bee with the mean electric charge found in the experiment

Consider a bee with the mean electric charge found in the experiment. This charge represents roughly how many missing electrons? (a). 1.9 × 108; (b). 3.0 × 108; (c). 1.9 × 1018; (d). 3.0 × 1018.

Q: What is the best explanation for the observation that the electric charge

What is the best explanation for the observation that the electric charge on the stem became positive as the charged bee approached (before it landed)? (a). Because air is a good conductor, the posit...

Q: For transverse waves on a string, is the wave speed the

For transverse waves on a string, is the wave speed the same as the speed of any part of the string? Explain the difference between these two speeds. Which one is constant?

Q: A musical interval of an octave corresponds to a factor of 2

A musical interval of an octave corresponds to a factor of 2 in frequency. By what factor must the tension in a guitar or violin string be increased to raise its pitch one octave? To raise it two octa...

Q: For each of the eight planets Mercury to Neptune, the semi

For each of the eight planets Mercury to Neptune, the semi-major axis a of their orbit and their or bital period T are as follows: (a) Explain why these values, when plotted as T2 versus a3, fall cl...

Q: An object is undergoing SHM with period 0.300 s and

An object is undergoing SHM with period 0.300 s and amplitude 6.00 cm. At t = 0 the object is instantaneously at rest at x = 6.00 cm. Calculate the time it takes the object to go from x = 6.00 cm to x...

Q: An object is undergoing SHM with period 1.200 s and

An object is undergoing SHM with period 1.200 s and amplitude 0.600 m. At t = 0 the object is at x = 0 and is moving in the negative x-direction. How far is the object from the equilibrium position wh...