The kinetic energy of the bob on a simple pendulum swinging in simple harmonic motion has its maximum value when the displacement from equilibrium is at what point in its swing?
a. zero displacement
b. 1/4 the amplitude
c. 1/2 the amplitude
d. equal the amplitude
a
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What did Le Verrier and Adams do differently than Herschel when they discovered Neptune?
a. found the planet by scanning thousands of photographic plates b. found the planet by accident by simply searching the sky c. applied the basic laws of physics to discover Neptune's position d. applied a newly modified telescope to find the position of Neptune e. witnessed the parallax of Neptune and calculated its position
The United States consumes 2.5 × 10^19 J of energy each year. A typical solar flare releases 5.0 × 10^24 J of energy. How many years could we run the United States on the energy released by this solar flare if all of the released energy could be used?
a. 5 × 10^-6 years b. 200,000 years c. 1.25 × 10^44 years d. about 12 years e. 500 years
Which of the following stellar properties has the greatest range in values?
A) mass B) radius C) core temperature D) surface temperature E) luminosity
The three graphs in the figures below represent the position vs. time for objects moving along the x-axis. Which, if any, of these graphs is not physically possible?