A child on a playground swing makes a complete to-and-fro swing each 2 seconds. The period is:

0.5 seconds

1 second

2 seconds

The escape velocity of a bullet from the surface of planet Y is 1919.0 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.37 times that of Y, and its radius is 0.935 times the radius of Y

You and your fellow students have been challenged to design a rubber band powered car. You will use the elastic potential energy of the rubber band to move the car a distance. The car that moves the greatest distance is the winner of the challenge.

Where could you hear a sonic boom

A wooden block has a mass of 986 g and a density of 16 g / cm3. What is the volume?

1. What type of evidence shows that, indeed, "there is more to perception than meets the senses?

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.

A few years ago, Serena Williams dived to hit a tennis ball right after it bounced off the ground. The ball bounced on the ground 10.3 m from the net, and after Serena hit the ball it flew over the 0.

A force of 1.25x103N is required to lift an object that is under the influence of an acceleration due to gravity of 7.86ft/sec2. What is the object's mass in kilograms?