What language does it use

A hot air ballon with a mass of 500kg ascends at a constant rate of 1.5 m/s for 20s. how much work is done by the upward force?

6. What does the slope of a velocity-time graph indicate?

What are three things that transfer energy by sound

A lens uses what process to deflect light rays passing through it? a. reflection b. refraction c. absorption d. transparency

The energy received by Earth from the sun is what type of energy?

A machine does 1,500 joules of work in 30 seconds. What is the power of this machine?

A boy standing on the deck of a bridge sees a motorboat approaching in the water below at a constant rate of speed. When the boat is 27 meters from the bridge, the big drops a stone to the water below. If the stone strikes the water 3.

Which object has a varying speed? A. a bird flying 10 m/s for 10 seconds B. a car slowing from 60 m/s for 10 seconds C. a fish moving at 2 m/s for 5 minutes D. a car traveling the speed limit

Most of the energy used by light on earth comes from

If a psychologist were to run an experiment measuring the effects of temperature on aggression the differing temperature would be considered the A. dependent variable. B. experimental variable. C. independent variable. D. random assignmen