How much time passes before it hears anecho

Reference no: EM1360741

Q. Suppose the roller coaster (h1 = 32 m, h2 = 11 m, h3 = 20) passes point A with a speed of 3.50 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 30.0 m.

Q. A dolphin located in sea water at a temperature of 25°C emits asound directed toward the bottom of the ocean 160 m below. How much time passes before it hears anecho?

Reference no: EM1360741

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How much time passes before it hears anecho : assume the roller coaster (h1 = 32 m, h2 = 11 m, h3 = 20) passes point A with a speed of 3.50 m/s. If the average force of friction is equal to one fifth of its weight, with what speed will it reach point B? The distance traveled is 30m.

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