Suppose a solid uniform sphere of mass M and radius R rolls without slipping down an inclined plane starting from rest. The angular velocity of the sphere at the bottom of the incline depends on
A) the mass of the sphere.
B) the radius of the sphere.
C) both the mass and the radius of the sphere.
D) neither the mass nor the radius of the sphere.
Ans: B) the radius of the sphere.
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Radioactive Decay: What happens to the half-life of a radioactive substance as it decays?
A. It remains constant. B. It increases. C. It decreases at a constant rate. D. It decreases at an exponential rate.
Energy Levels: In a transition from one vibrational state to another, a molecule emits a photon of wavelength 5.56 µm. What is the energy difference between these two states? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 0.223 eV B. 2.23 MeV C. 13.6 eV D. 13.6 MeV E. 0.223 MeV
A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular speed of 200 revolutions per minute, then the tangential velocity of a point on the circumference is
A. 1.06 m/s. B. 1.26 m/s. C. 1.39 m/s. D. 1.62 m/s. E. 1.32 m/s.
While Voyagers were probes that flew past in a few days, Galileo and Cassini are orbiters, designed to study Jupiter and Saturn over prolonged periods of time
Indicate whether the statement is true or false