An electric bell is kept under a bell jar in which a vacuum has been created slowly air is introduced in to the jar. what will happed to the sound of electric bell?

When comparing the momentum of two moving objects, which of the following is correct? a. The object with the higher velocity will have less momentum if the masses are equal. b.

5. What happens to the inductor current as time passes? 6. What happened to the inductor current when the supply voltage was tripled? 7. What happened to the inductor current when the inductor value was doubled? 8.

Two physics students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s; at the same instant, the other student throws a ball vertically upward at the same speed.

A fish swimming behind an oil tanker gets caught in a whirlpool created by the ship's propellers. The fish has an initial angular speed of 0.70 rad/s. After 4.3 s, the fish's angular speed is 13.7 rad/s.

27. Find the acceleration of a particle moving with a con- stant speed of 8 m/s in a circle 2 m in radius.

A moving object can be in equilibrium. Explain.

If gravity puts a force of 3N an object, how much force would it put on an second object that was twice as heavy

Where did the asteroids in the asteroid belt come from?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.