Objects can be charged in many ways. , a student is rubbing a balloon on his head. What method is he using to charge the balloon?

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

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Is a volume of space that is empty of matter.