Find the change in the gravitational force between two planets if the masses of both planets are doubled but the distance between them stays the same.

For work to be done on a block of wood, which of the following must happen?

A hydraulic system for a dentist's chair is designed to be able to lift 3,112 newtons. the surface area over which this force is applied is 707 cm2. what force must be applied to the activator end of the system if the button has a surface area of 3.

A 10 v battery produces 5 w of power. what is the current drawn by the circuit? a. 0.5 a b. 2 a c. 5 a d. 50 a

Are switches connected in series or parallel with the devices they control?

There is a net flow of thermal energy transferred between two substances until A one substance is warmer than the other. B both substances are warmer than they were. C both substances are cooler than they were.

Which of these would you include ina free body diagram for a bicycle-plus-rider taken together as the bicycle is being pedaled up the hill?

What are two possible uses of genetic engineering

How many joules are expended by a 70 kg man climbing up 6m of stairway? How much work is done if the climbing takes place on the surface of the moon? (Assume that the acceleration due to gravity on the moon's surface is 1.6 m/s2

A baseball flying through the air has kinetic energy because of its motion. true or false?

How many poles does Jupiter's magnetosphere have? a. 2 c. 8 b. 4 d. 9