Enzo throws a rock horizontally with a speed of 12 m/s from a bridge. It falls for 2.28 s before reaching the water below with no appreciable air resistance. Just as the rock reaches the water, find (a) the horizontal component of its velocity
(b) the speed with which it is moving.
(a) 12 m/s (b) 25 m/s
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Which of the paths shown represent unbound orbits?
A) 1 only B) 2 only C) 3 only D) both 2 and 3 E) There is no such thing as an unbound orbit.
During a star's main sequence portion of its life it does not change size appreciably. This observation indicates that
A. the Sun produces about the same amount of energy as it radiates into space. B. the Sun produces less energy than it radiates into space. C. the Sun produces more energy than it radiates into space.
A photon whose energy is 8.00 × 10^?15 J is scattered off an electron at a 90° angle. What is the wavelength of the scattered wave?
a. 2.73 × 10^?11 m b. 2.25 × 10^?11 m c. 2.50 × 10^?11 m d. 2.40 × 10^?12 m e. 2.48 × 10^?11 m
A series LC circuit contains a 100 mH inductor, a 36.0 mF capacitor and a 12 V battery. The period of the electromagnetic oscillations in the circuit is
a. 0.0227 s. b. 0.377 s. c. 2.26 s. d. 105 s. e. 1750 s.