Simple Pendulum: What is the length of a simple pendulum with a period of 2.0 s?
A. 20 m
B. 0.99 m
C. 1.2 m
D. 1.6 m
E. 0.87 m
Answer: B
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Grandfather clocks are designed in a way that the weight at the bottom of the pendulum can be moved up or down by turning a small screw. Suppose you have a grandfather clock at home that runs fast
Should you turn the adjusting screw so as to raise the weight or lower the weight? A) Raise it. B) Lower it. C) It doesn't matter if you raise or lower the weight, as long as you displace it by the right amount. D) It doesn't matter if you raise or lower the weight, as long as you displace it with the correct initial velocity. E) Raising or lowering the weight doesn't help, the screw is there so that you can add or take away weight.
Faraday's law describes
A) electromagnetic induction. B) the connection between current, voltage, and resistance. C) the attraction and repulsion of magnetic poles. D) the force between magnetic poles. E) all of the above
A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +15 V b. ?15 V c. ?33 V d. +33 V e. ?20 V
You measure the temperature of two objects and one of them is warmer than the other. From this you can conclude
1.that the warmer object contains more heat than the cooler object. 2.that the warmer object contains more internal energy than the cooler object. 3.that the warmer object was heated for a longer period of time than was the cooler object. 4.none of these statements.