A boy is running with a kinetic energy of 810 j if the boy has a mass of 80 kg whats his speed?

What happens to the temperature of a substance when it is changing state of matter?

Forecast error is found by subtracting the forecast from the actual demand for a given period. True or False

How is hydroelectric power created? A. Gas pushing a turbine that generates power B. Water pushing a turbine that generates power C. Wind pushing a turbine that generates power D. Air pushing a turbine that generates power

The frequency of a steam train whistle as it approaches you is 552 Hz. After it passes you, its frequency is measured as 486 Hz. How fast was the train moving (assume constant velocity) ?

A bowling ball is dropped from a height of 24 feet. a. Write a function that gives the height h (in feet) of the bowling ball after t seconds. h (t) = ? b. Find the height of the bowling ball after 1 second.

4. A car of mass 2000 kg is traveling at 45 m/s when the driver spots a policeman anead. i ne univer apprivo the brakes lightly for 3.0 seconds until he slows down below the speed limit. If the average force applied by the brakes was 1.

When does a scientist create the conclusion?

When using a simple machine, the force you must overcome. A simple machine usually multiplies the effort force to exceed the this. Example: Lucy lifts a sack of potatoes using a pulley. The weight of the sack of potatoes is this.

How is ecology diffrent from earth science

Which theory was first proposed by Albert Einstein? A. the theory of special relativity B. the theory of universal gravitation C. the theory of inertia D. the theory of radioactivity ... the answer is A i just found out