A train travels 51 kilometers in 1 hours, and then 72 kilometers in 5 hours. What is its average speed?

What must be true about two objects if heat is flowing between them? the objects must be different temperatures. the objects must be the same temperature. the objects must both be over room temperature.

What will be the effect of two forces of equal magnitude acting on a moving rigid body from opposite directions along the same line? a) the object will deform. b) the object will twist or turn. c) the object will remain in static equilibrium.

A lamp that plugs into a wall socket draws energy, which flows through a thin wire in the bulb, causing it to heat up until it glows.

A student is testing her reaction time by trying to keep a light bulb on for exactly 4 seconds by matching a stopwatch. When she turns the light bulb off, the stopwatch reads 4.13 seconds. What is her reaction time?

The word atom comes from a Greek word that means "able to duplicate".

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W).

The largest volcanic structures on venus are called:

a block with a mass of 3 kg is swung on a cord in a horizontal circle with a radius of 2m. the speed of the block is 6m/s^. the magnitude of the acceleration of the block is most nearly

A scientific theory becomes more widley accepted as it explains more and more?