An athlete practicing for a track meet ran 400 meter in 50 seconds. What was his average speed?

No nuclear reactions occur in the interior of a white dwarf. its brilliance comes from stored heat. therefore, the fate of an isolated white dwarf is to slowly lose its stored energy and dim over a long period of time.

What about a rubber band, can it change its shape? Is it a solid?

Extra-solar planets are probably composed of which gases?

The absolute pressure, in kilopascals, a depth 10m below sea level is most nearly? (Assume the pressure is, in fact, being measured underwater) A) 100 B) 150 C) 200 D) 250 E) 300

What is the electric current flowing through a circuit

A toy rocket is fired vertically into the air from the ground at an initial velocity of 80 feet per second. Find the time it will take for the rocket to return to ground level

A block sliding along a horizontal frictionless surface with speed v collides with a spring and compresses it by 2.0 cm. What will be the compression if the same block collides with the spring at a speed of 2v?

1. It takes a 25 N force to push a 250 N box across the floor. a. How much work is done against friction when the box is moved 2 m across the floor? b. How much work is done against gravity when the box is lifted 2 m above the floor?

A 0.5 kg ball is thrown horizontally towards a wall with a speed of 10 m/s. The initial velocity is chosen to be the positive x - direction for this question.

Which is the chykogon of the hydrogen