Numerical probles of science : The radius of a cricket ball is 3 cm. Calculate its area.

A woman exerts a horizontal force of 10 pounds on a box as she pushes it up a ramp that is 4 feet long and inclined at an angle of 30 degrees above the horizontal. Find the work done on the box.

In 3.0 seconds, a wave generator produces 15 pulses that spread over a distance of 45 centimeters. Calculate its period. 0.022 s 0.066 s 0.20 s 0.33 s

If an object has a mass of 38 kg, what is its approximate weight on earth?

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

2 cycleists, 90 miles apart starting riding toward each other at some times one cycles twice as fast as the other if they meet 2 hrs later at what average speed is each cyclist traveling

A ball is thrown upwards with an initial velocity of 25. o m/s, what is the velocity of the ball at 11.9 m from the ground?

Can rocks be weathered by wind and chemicals in the air

1. if you rub a neutral glass rod with silk, the silk acquires a negative charge. if you rub a neutral glass rob with a rubber rob, the rubber rod acquired a negative charge.

What's a scientific inquiry

Calculate work If force of 50 Newton's and distance is 6 meters.