Thomas Young's two-source interference patterns demonstrate the
A) particle nature of light.
B) wave nature of light.
C) both of these
D) neither of these
Answer: B
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A mercury manometer measures a pressure of 200 mmHg. What is this pressure in atm?
A. 0.204 B. 0.263 C. 0.301 D. 0.325 E. 0.375
The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. According to this equation, if the distance between two objects increases, what happens to the gravitational force between them?
A) The force increases. B) The force decreases. C) The force drops instantly to zero. D) The gravitational force is not affected by distance.
A satellite is held in orbit by a 1 000-N gravitational force. Each time the satellite completes an orbit of circumference 80 000 km, the work done on it by gravity is:
a. 1.0×108 J. b. 8.0×108 J. c. 1.0×1011 J. d. 0. e. 8.0×1011 J.
An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 500 m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00