Sonia was experimenting with electric charges. She tied two inflated balloons together, held them next to each other, and rubbed both with a piece of wool. What did Sonia observe, and why?

The mass of the Earth is 5.98 * 1024 kg. A 11 kg bowling ball initially at rest is dropped from a height of 2.63 m. The acceleration of gravity is 9.8 m/s 2.

A cart being pulled with 30N through a 2 m hallway over two seconds. How does it have the greatest power exerted on it

A pulley system used to lift car tires has a mechanical advantage of 11.2. If you pull on the pulley with a force of 150 N, how much force does the pulley exert on the tire?

The amount of light entering the eye is regulated by the

If a meter stick moves to your right at a constant velocity of 0.8 c, what would you measure its length to be

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

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.