A man standing between two cliffs blew a whistle and heard echoes after
2 s and 2.5 s. Calculate the distance
between the cliffs.
s']
[Speed of sound in air = 340 ms

Your pendulum clock which advances 1.0 s for every complete oscillation of the pendulum is running perfectly on earth at a site where the magnitude of the acceleration due to gravity is 9.80 m/s2. you send the clock to a location on the moon where the magnitude of the acceleration due to gravity is 1.65 m/s2.

The material that keeps its new shape after it is stretched is called?

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? how far will the football travel before it lands?