Tarzan swings back and forth on a long vine. His friend Jane notices in amazement that he makes 30 complete swings in 2.4 minutes
(a) What is the frequency (in hertz) of Tarzan's swing?
(b) How long is the vine he is using?
(a) 0.21 Hz (b) 5.7 m
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There must be equal amounts of mass on both sides of the center of mass of a system
A) True B) False
When a sample of water at 0.0°C is cooled to –36.0°C and freezes in the process, 935,000 kJ of heat is liberated
What is the mass of this sample of water? For water LF = 334,000 J/kg, LV = 2.256 × 106 J/kg, and the specific heat of ice is 2050 J/kg ? C°. A) 2290 kg B) 1145 kg C) 2800 kg D) 12,700 kg
An RLC series circuit has a 400
resistance, a 2.5 mH inductor, and a capacitor. If the circuit is in resonance at 30 kHz and is attached to a 20 mV rms power supply, what is the rms voltage across the inductor?
A. 20 mV B. 24 mV C. 16 mV D. 48 mV E. 0.00
This diagram represents an edge-on view of our Milky Way Galaxy. Of the four labeled points, which one could represent the Sun's position in the galaxy?
A) point 1 B) point 2 C) point 3 D) point 4