12/10/20
A group of hikers hears an echo 2.10 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 346.4 m/s.
A group of hikers hears an echo 2.10 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 346.4 m/s.
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How much energy does it use during 20 min of operation?
The resistance of an electric heater is 85 Ω when connected to 120 V. How much energy does it use during 20 min of operation?
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12/04/20
A 2000 kg car travels at a constant speed of 12 m/s around a circular curve of radius 30 m. What is the magnitude of the centripetal acceleration of the car as it goes around the curve?
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12/03/20
A piece of Zinc with a mass of 0.027 kg us heated from 22C to 100C. What was the amount of heat added?
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