Why is gravitational potential energy negative?

What do we mean by the orbital energy of an orbiting object (such as a planet, moon, or satellite) ?

A pair of 10 μf capacitors in a high-power laser are charged to 1.7 kv. how much energy is stored in each capacitor

Cumulonimbus clouds often form along cold forms. which type of weather is most likely to occur along a cold front?

Which of these factors control ocean currents? select the two correct answers. A Water temperature B Weather forecasts C Global winds D Ocean depth

How do you explain the fact that sometimes less work is done in a situation in which more force is used than in a situatio in which less force is used

If a skater who is spinning pulls her arms in so as to reduce her rotational inertia by half, by how much will her angular momentum change? by how much will her rate of spin change?

What an object is made up of and the color of light that strikes it determine the A) apparent color of object B) transparency of the object C) opacity of the object D) translucence of the object

This chart shows characteristics of three different types of waves.

Which of the following statements about Boyle's law are correct? The temperature and pressure must remain constant for the law to apply. The temperature and the number of molecules must remain constant for the law to apply.

Exposure to high energy electromagnetic radiation such as waves can cause cancer sterility and death