Which body has the densest atmosphere?
A) our Moon
B) Mercury
C) Earth
D) Venus
E) Mars
D
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A charge of 4.0 nC is distributed uniformly along the x axis from x = +4 m to x = +6 m. Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the origin?
A.
B.
C.
D.
E.
The rate of heat dissipation in an AC circuit with resistance, R, and effective current, Irms, is given by which of the following?
a. (Irms)2R c. 2.0 × (Irms)2R b. 4.0 × (Irms)2R d. 0.5 × (Irms)2R
A CD player uses a laser with wavelength 900 nm. If the CD has a plastic coating with index 1.50, what is the wavelength in the plastic?
a. 600 nm c. 1350 nm b. 500 nm d. 750 nm
The distance between peaks on a wave divided by the time for the wave to travel this distance is the wave's
a. speed b. frequency c. wavelength d. amplitude e. loudness