Describe how the energy from stars is release?

In one case, a sports car, its engine running, is driven up a hill at a constant speed. In another case, a truck approaches a hill, and its driver turns off the engine at the bottom of the hill. The truck then coasts up the hill.

You are walking in the forest with some friends when a wild bear shows up! Naturally, you all begin running faster. Assume that you had an initial velocity of 0.5 m/s. After running for 20 seconds, you are 50 meters away from where you started.

Which of the following are not results of the force of gravity

Which is denser, ice at 0 degrees C or water at 4 degrees C a. the water b. the ice c. They both have the same density

Which elements would you expect to be similar to technetium

Heat that is transferred by the movement of currents within a fluid is called?

5. What is the percent composition of sulfur in H2SO4? A. 32.7% B. 65.2% C. 98.1% D. 2.1%

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.