The period of a pendulum is the time it takes the pendulum to swing back and forth once
If the only dimensional quantities that the period depends on are the acceleration of gravity, g, and the length of the pendulum, L, what combination of g and L must the period be proportional to? Acceleration has dimensions of [L][T-2]. A) g/L
B) gL2
C) gL
D)
E)
E
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A spaceship traveling very fast relative to you fires a stream of photons at speed c away from you. You measure the photons' speed to be
A) less than c. B) more than c. C) equal to c.
A hockey puck moving at 8.0 m/s coasts to a halt in 75 m on a smooth ice surface. What is the coefficient of friction between the ice and the puck?
a. µ = 0.025 c. µ = 0.12 b. µ = 0.033 d. µ = 0.044
A solid has a solubility at room temperature of 78 grams per liter. If 1.0 L of a hot solution containing 100. g of solute is cooled to room temperature, how much solid is formed?
A) 22 g B) 100 g C) 78 g D) 1 L E) 78g/L
LC Circuits: A series circuit contains an 80-?F capacitor, a 0.020-H inductor, and a switch. The resistance of the circuit is negligible. Initially, the switch is open, the capacitor voltage is 50 V, and the current in the inductor is zero. At time t = 0 s, the switch is closed. What is the maximum current in the circuit?
A. 2.2 A B. 2.4 A C. 2.8 A D. 3.0 A E. 3.2 A