If a boulder has a mass of 50 kg and a potential energy of 490 j what is the height of the boulder

Why can radio telescopes be used 24 hours a day?

A large punch bowl holds 3.35 kg of lemonade (which is essentially water) at 20.0° C. A 1.62-kg ice cube at. - 10.2°. C is placed in the lemonade.

If an electric circuit was analogous to a water park, then the battery would be analogous to the a. pipes which carry water to the circuit b. pump which supplies energy to move the water from a ground to a high elevation c.

When two kinds of pulleys are used together the system is called

It is difficult to observe 1-nanometer, 1 millimeter, and 100 meter radiation with ground-based telescopes. What are the reasons for each?

When a charged cloud passes overhead, the goround below is charged by A deduction B electrification C polarization D induction

What happens during constructive interference? two waves moving through the same medium add their effects one wave prevents another from moving through the same medium two waves produce two more waves waves moving in opposite directions cancel each

The weight of an object is a. the force of gravity on its mass. b. the amount of matter in an object. c. the tendency of an object to resist motion. d. the tendency of an object to continue moving in a straight line.

The target substance of a drug is called a A. contraindicator. c. receptor. B. stimulator. d. transporter.

You are skateboarding and push back with one leg, and, as a result, the skateboard moves forward. Which law of motion is being described in this scenario?