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Question: Cliff Height you are climbing in the High Sierra where you suddenly find yourself at the edge of a fog-shrouded cliff. To find the height of this cliff, you drop a rock from the top and 10.0 s later hear the sound of it hitting the ground at the foot of the cliff.
(a) Ignoring air resistance, how high is the cliff if the speed of sound is 330 m/s?
(b) Suppose you had ignored the time it takes the sound to reach you. In that case, would you have overestimated or underestimated the height of the cliff? Explain your reasoning.
A 5.40 kg mass attached to a spring oscillates with a period of 0.445 s and an amplitude of 17.0 cm. Find the total mechanical energy of the system
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Estimate how much power is saved if the voltage is stepped up from 240 V to 1200 V and then down again, rather than simply transmitting at 240 V
Though slow on land, the leatherback turtle holds record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Assume the largest leatherback yet discovered were to swim at the top leatherback speed. If its k..
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The density of free electrons in gold is 5.90 × 1028 m-3. The resistivity of gold is at a temperature of 20°C and the temperature coefficient of resistivity is A gold wire, 1.1 mm in diameter and 29 cm long, carries a current of 650 mA. The drift ..
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An earthquake strikes a small college and shakes all of the books off the shelves. About how much money will this cost the library
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