A CD has a diameter of 12.0 cm. If the CD is rotating at a constant frequency of 6.00 cycles per second, then the angular velocity is
A. 21.5 rad/s.
B. 26.9 rad/s.
C. 29.6 rad/s.
D. 33.3 rad/s.
E. 37.7 rad/s.
E. 37.7 rad/s.
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What is the solar wind?
a. strong radiation that comes from the Sun b. similar to winds on Earth, but faster and stronger c. similar to winds on Earth, but less dense and weaker d. atoms and particles ejected from the Sun at high speed e. strong winds on the surface on the sun due to large temperature differences
What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg, its radius is 3.40 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2
A) 1.75 h B) 1.25 h C) 1.15 h D) 1.00 h E) 1.45 h
The volume of matter is due mostly to its
A) protons. B) electrons. C) both of these
Between mass and weight, the more fundamental quantity is
A) mass. B) weight. C) both the same. D) none of the above