(Solve the problem) The average speed of sound in water is 1,500 m/s. How long would it take a sound wave to travel 250,000 km?
(HINT: Use your dimensional analysis and metric conversion skills and remember:
K H D u d c m)

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.