Explain why the outer planets did not lose their lighter gases from their atmosphere.

11. Which of the following phenomena is taking place when sound waves are reflected from a surface along parallel lines? A. Refracting B. Absorption C. Focusing D. Diffusion

A boy whirls a stone with uniform speed in a horizontal circle of radius 2 m and at height 2 m above the ground. The string breaks and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 2 m.

Why can gamma rays pass threw or penetrate solids?

The total work done in lifting a typical high school physics textbook a vertical distance. 1 meter is approximately a. 15 J b. 1.5 J c. 15 J d. 150 J

A charge of 30. coulombs passes through a 24-ohm resistor in 6.0 seconds. What is the current through the resistor? (1) 1.3 A (3) 7.5 A (2) 5.0 A (4) 4.0 A

Which is a vector quantity speed or velocity

With a naked eye your are unlikely to see a "blank" in your lifetime. A - Comet. B - Shooting Star. C - Meteor. D - Planet.

If there is a current of 15A in a circuit for 5 minutes, what quantity of electric charge flow through the circuit?

Which universal force acts on protons and neutrons in an atom's nucleus?

How many turns are in the secondary coil of a step up transformer that increases voltage from 30 V to 150 V and has seven turns in the primary coil?