Water is used to cool down the motor engine, why?

Which star does He fusion

A ball rolls off a desk at a speed of 3.0 m/s and lands 0.40 seconds later. a) how far from the base of the desk does the ball land b) how high is the desk? c) What is the speed of impact?

Why do earthquakes tend to be deeper near subduction zones?

What is the average speed in km/h of a car that travels 160km for 2h?

What is the weight (in newtons) of a bowling ball that has a mass of 3 kilograms?

How does a substance's temperatura chanté when the average kinetic energy of its particles increases? When it decreases?

Because the moon rotates once for each revolution around Earth, Choose one answer. a. you see some phases more than others. b. a different side of the moon faces Earth each day. c. you never see the far side of the moon.

Planet A takes 1 year to go around its star at an average of 1 A. U. distance. Planet B is 4 A. U. from the star. Calculate how long Planet B takes to orbit.

Average mass of a toy car (small, hot wheels) ?

A pwc capsizes. what is the best way to roll the pwc to turn it upright?