A large, metallic, spherical shell has no net charge. It is supported on an insulating stand and has a small hole at the top. A small tack with charge Q is lowered on a silk thread through the hole into the interior of the shell. The tack is now allowed to touch the interior surface of the shell. After this contact, what is the charge on the tack?
1.Q
2.Q/2
3.0
4.-Q/2
5.-Q
3
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______________ are substances that cannot be decomposed by chemical processes
Fill in the blank(s) with correct word
A 15-kg block rests on a level, frictionless surface and is attached by a light string to a 10-kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8 m/s2, what is the tension in the connecting string?
a. 65 N c. 59 N b. 17 N d. 37 N
Beats: Two taut strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.330 cm longer than the other. Waves on these strings propagate at 34.0 m/s.The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency?
A. 12.3 Hz B. 9.00 Hz C. 12.0 Hz D. 12.7 Hz E. 11.3 Hz
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