Which of the following is NOT true about a hypothesis?

A. It is an explanation for an observation

B. It must restate the question

C. It is testable

D. It can be written as an if/then statement

How coal power plants produce electrical energy to power our homes

Two children (m = 40 kg each) stand opposite each other on the edge of a merry-go-round. The merry-go-round, which has a mass M of 200 kg and a radius of 2.0 m, is spinning at a constant rate of 12 rad/s.

the arm of a crane is 15.0 m long and makes an angle of 70.0 degrees with the horizontal. Assume that the maximum load for the crane is limited by the amount of torque the load produce around the base of the arm.

You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 660 N and that of your belongings is 1100 N. (a) Determine the work done by the elevator in lifting you and your belongings up to the 6th floor (15.

What is the name of a device used to measure the transfer of heat from one object to another? barometer calorimeter heatometer scale

How do we use light in space?

What units are used for gravitational potential energy? Write the name, not the symbol.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa B. 73.5 Pa C. 226.5 Pa D. 122.5 Pa

A boulder of mass 2000 kg is at the top of a cliff of height 220 m. Determine how fast the boulder will be moving when it strikes the dirt below.

Which of the following statements are true? Check all that apply. O A positive charge and a negative charge attract each other. O Electric charge is conserved. O Two positive charges attract each other. O A neutral object contains no charge.