Two spaceships approach each other along a straight line at a constant velocity of 0.988c as measured by the captain of one of the ships. An observer on Earth is able to measure the speed of only one of the ships as 0.900c
From the point of view of the observer on Earth, what is the speed of the other ship?
0.794c
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The Trojan asteroids orbit the Sun at an average distance of ________.
A. 60 behind B. 60 ahead C. 100,000,000 miles D. 5.2 AU
The strong force is an attractive force between
A. Two protons. B. Two neutrons. C. A proton and a neutron. D. Both A and B. E. All of A-C.
The greatest redshifts yet observed for quasars is about
A) 0.1. B) 0.7. C) 1.4. D) 7.0. E) 14.0.
A rectangular wire loop (length = 60 cm, width = 40 cm) lies completely within a perpendicular and uniform magnetic field of magnitude of 0.5 T. If the length of the loop starts increasing at a rate of 20 mm/s at time t = 0, while the width is decreasing at the same rate, what is the magnitude of the induced emf at time t = 4.0 s?
a. 6.8 mV b. 5.2 mV c. 3.6 mV d. 8.4 mV e. 10 mV