Doubling only the spring constant of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?
A)
increases the energy by a factor of square root of two
B)
increases the energy by a factor of two
C)
increases the energy by a factor of three
D)
increases he energy by a factor of four
E)
produces no change
B
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Suppose that a particle is trapped in a box. How does the spacing in energy between adjacent energy levels change as the quantum number identifying a level increases?
A) The spacing decreases. B) The spacing alternately increases and decreases, depending on whether the wave function is a sine or a cosine function. C) The spacing remains constant. D) The spacing increases.
If the speed of light is represented by c, what equation would you use to determine the distance light travels, x, in a time t?
A. x=c*t B. x=c/t C. x=c+t D. 1/x = c*t
Increasing the brightness of a beam of light without changing its color will increase
A) the number of photons per second traveling in the beam. B) the energy of each photon. C) the speed of the photons. D) the frequency of the light. E) the wavelength of the photons.
Two inflated balloons are of identical size and shape, but one is filled with hydrogen, the other helium. Which has the larger buoyant force on it?
a. neither—the buoyant forces must be equal b. the helium balloon c. the hydrogen balloon d. It can't be determined.