A 2.5-mC charge is on the y-axis at y = 3.0 m and a 6.3-mC charge is on the x-axis at x = 3.0 m. What is the direction of the potential at the origin?
A. 22.0
B. 168
C. 292
D. 332
E. potential has no direction
E. potential has no direction
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A mass of 0.40 kg, hanging from a spring with a spring constant of 160 N/m, is set into an up-and-down simple harmonic motion. What is the speed of the mass when moving through the equilibrium point? The starting displacement from equilibrium is 0.10 m
a. zero c. 2.0 m/s b. 1.4 m/s d. 3.4 m/s
Using the quantum theory of EM waves, ___________ was successful in explaining the photoelectric effect. (He later won a Nobel Prize for this work.)
A. Hertz B. Planck C. Einstein D. Maxwell E. Bohr
The flow of energy through each shell determines:
A) the mass of each shell. B) the diameter of each shell. C) how much weight a shell can balance. D) how many planets revolve around a star.
Wave velocity is inversely proportional to
a. period. b. wavelength. c. amplitude. d. all of these.