A spherical balloon contains a positively charged particle at its center. True or false, as the balloon is inflated to a larger volume while the charged particle remains at the center, which of the following is true?
1.The electric potential at the surface of the balloon increases.
2.The magnitude of the electric field at the surface of the balloon increases.
3.The electric flux through the balloon remains the same.
4.none of these
3
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Beats: Two motors in a factory are running at slightly different rates. One runs at 825.0 rpm and the other at 786.0 rpm. You hear the sound intensity increase and then decrease periodically due to wave interference. How long does it take between successive instances of the sound intensity increasing?
A. 1.54 s B. 1.43 s C. 1.66 s D. 1.79 s
The mass of a mass-and-spring system is displaced 10 cm from its equilibrium position and released. A frequency of 4 Hz is observed. What frequency would be observed if the mass had been displaced only 5 cm and then released?
A) 8 Hz B) 4 Hz C) 6 Hz D) 2 Hz
The piston of a cylinder containing a quantity of ideal gas is advanced so that the volume of the gas is decreased by one-half. A pressure gauge on the cylinder shows the pressure of the gas to have increased threefold in the process. By what factor does the temperature of the gas change?
According to the law of poles, like poles ______________
Fill in the blank(s) with correct word