Complete the statement according to the concepts that you have learned

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

As the distance from a magnet increases, what happens to the magnet force?