Electric forces can be either repulsive or attractive, whereas gravitational force is always:

Stars that are closer look- A. brighter B. dimmer C. white

If a 50 kg student is standing on the edge of a cliff. Find the student's gravitational potential energy if the cliff is 40 m high.

If the power developed in an electric circuit is doubled the energy used in one second is

you add 8950 J of heat to 174 g of iron. What is the temperature of the iron (c=452 J / (kj * C degrees)) ?

Heat engine uses thermal energy flowing from a heat source that is 225 K to a cold sink that is 50 K. What is the approximate efficiency of the heat engine?

3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?

Kendall has empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble. Which statement best describes what Kendall can do? A.

2. With regard to the pH scale, a solution with a pH A. higher than 7 is considered an acid. B. lower than 7 is considered basic. C. of 6 is considered neutral. D. close to 14 is considered a strong base.

If a car rolls gently off a vertical cliff, how long does it take to reach 90km/hr.

In the game of volleyball, what skill relates to Newton's second law