Simple Pendulum: Tarzan swings back and forth on a long vine. His friend Jane notices in amazement that he makes 30 complete swings in 2.4 minutes.(a) What is the frequency (in hertz) of Tarzan's swing?(b) How long is the vine he is using?
What will be an ideal response?
(a) 0.21 Hz (b) 5.7 m
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A semiconductor is produced by doping Group IV silicon with 1023 atoms per cubic meter of Group III gallium. Assume that at room temperature this semiconductor is in the extrinsic range of operation.
(a) What type of semiconductor is this? (b) Calculate the room-temperature electrical conductivity of this semiconductor. (c) Clearly state any assumptions you made in calculating the electrical conductivity in part (b).
The smaller the frequency of light, the smaller the ______________ of its photons
a. wavelength b. speed c. mass d. energy
Electrons in the presence of a magnetic field transition from 4p energy states to 3d states. How many different spectral lines could be observed from these transitions?
A) one B) two C) three D) five
The reason the north pole of a bar magnet free to rotate points north is because
a. the south geographic pole of the earth is the Earth's magnetic north pole. b. the south geographic pole of the earth is the Earth's magnetic south pole. c. there is a net accumulation of negative magnetic charge at the Earth's south geographic pole. d. there is a net accumulation of positive magnetic charge at the Earth's north geographic pole. e. the north geographic pole of the Earth is the earth's magnetic north pole.