Reference no: EM1361014

Q. A bat flying in a cave emits a sound and receives its echo 0.37 s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)

Q. A 1.62 m wide, 1.38 m high, 1500 kg car hits a very slick patch of ice while going 20.0 m/s. Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 18.0 m/s? If friction is neglected, how long will it take until the car's speed drops to 10.0 m/s?