You don't need both. GPE is the gravitational potential energy caused by the fact that an object is not touching the ground of the earth. KE is caused by an object moving. This problem says that the bowling ball "sits" meaning that you only need the GPE because it's not moving and it is not touching the surface. You would use the GPE equation to find how much Potential energy an object has. If you want its velocity, you would set the answer to the GPE equation equal to the KE equation to find its velocity.
Comets are cosmic snowballs of frozen gasses, rock and dust that orbit the sun. When frozen, they are the size of a small town. When a comet's orbit brings it close to the sun, it heats up and spews dust and gasses that form a tail that stretches away from the sun fr millions of miles. There are probably billions of comets orbiting our sun in the Kuiper Belt and even more distant Oort Cloud. Comets have right for its name and had best to orbit the sun in the Kuiper Belt.
Answer:
A physical can be changed back to its original state. A chemical can not.
Explanation:
Answer:
Suppose that you are looking at the reflex candle in one mirror.
The image in the mirror is called the "virtual image"
If the real candle is at a distance of, let's say, 5 meters from the mirror, then the virtual image in the mirror will be also 5 meters "inside" the mirror.
Now, the light that emanates from the candle in the reflex seems to come from the virtual image, 5 meters inside of the mirror, but this is obviously not the real case.
The rays come, originally, from the real candle, and then those rays are reflected in the surface of the mirror.
Then the rays of the virtual image actually come from the surface of the mirror and not from the virtual image itself
