For light waves, different frequencies mean different
A) colors.
B) speeds.
C) brightness.
D) amplitudes.
E) None of the above.
A
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A mass which weighs 19.6 Newtons on Earth is 2.3 meters away from a 2.00 kg mass
(a) Determine their mutual gravitational attraction to each other. (b) How much work would have to be done to put a very large distance between the two masses?
Time Dilation: A spaceship enters the solar system moving toward the Sun at a constant speed relative to the Sun. By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is 50.0 minutes. How fast is the spaceship traveling towards the Sun? The radius of the orbit of Jupiter is 778 × 109 m, and that of the orbit of Mars is 228 × 109 m.
A. 0.319c B. 0.438c C. 0.522c D. 0.671c E. 0.982c
Heat normally flows from objects of high
A) internal energy to objects of low internal energy. B) temperature to objects of low temperature. C) both of these D) neither of these
A car is decelerating at the rate of 2 km/s2. If its initial speed is 66 km/s, how long will it take the car to come to a complete stop?
A. 33 s. B. 330 s. C. 3.3 s. D. 132 s.