An ore car of mass 2000 kg rolls downhill on tracks from a mine. At the end of the tracks, 10.0 m lower in elevation, is a spring with k = 400,000 N/m. How much is the spring compressed in stopping the ore car? Ignore friction
a. 0.14 m
c. 1.40 m
b. 0.99 m
d. 1.96 m
B
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A 400-g piece of metal at 120.0°C is dropped into a cup containing 450 g of water at 15.0°C
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The maximum speed of a 3.00-kg object in simple harmonic motion is 4.00 m/s. The maximum acceleration of the object is 5.00 m/s2. What is the period of simple harmonic motion?
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An unknown resistor is wired in series with an ammeter, and a voltmeter is placed in parallel across both the resistor and the ammeter. This network is then placed across a battery
If one computes the value of the resistance by dividing the voltmeter reading by the ammeter reading, the value obtained A) is less than the true resistance. B) is greater than the true resistance. C) is the true resistance. D) could be any of the given answers. It depends on other factors.