Why is it easy to remove air from balloon and is difficult to remove air from glass bottle

Why is the combination of two protons and two neutrons stable, but two protons and one neutron is not?

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

If a ball is rolling at a velocity of 1.5 m/sec and has a momentum of 10.0 kg·m/sec, what is the mass of the ball?

With regard to pneumatic mechanical devices which afford protection against the formation of ice, which of the following statements is correct?

Match each term with the appropriate definition

Mechanical work is done an object when a force displaces the object in the direction of the force or a component of the force. True or false?

Electric current can best be induced in a wire by a. stretching the wire. b. moving a magnet up and down near the wire. c. setting the wire near a magnet. d. rotating the wire. E. none of the above

A car traveled 176 miles on 6.4 gallons of fuel the car averaged how many miles per gallon

Which of these describes how heat is transferred by radiation? A.) Warm air rises and takes heat with it; eventually it cools and sinks. B.) Sunlight travels through space without the aid of fluids or solids. C.

A body is moving with a velocity of 12m/s and it comes to rest in 2 minutes, what was the acceleration?