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In: Physics

How many hours would be required to make a 3900 km trip across the United States...

How many hours would be required to make a 3900 km trip across the United States if you average 100 km/h? ______h

At an average speed of 145 mph, how long would it take a race car to complete a 680 mile race? ____h

A certain car can accelerate from 0 to 60 mph in 7.5 s. What is the car's average acceleration in mph/s? _____ mph/s

You throw a ball straight up at 20 m/s. How many seconds elapse before it is traveling downward at 12 m/s? _____s

A rock is dropped into an abandoned mine and a splash is heard 8 s later. Assuming that it takes a negligible time for the sound to travel up the mine shaft, determine the depth of the shaft and how fast the rock was falling when it hit the water. depth of well ________ m velocity of rock __________ m/s

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