20. The fox is chasing a chipmunk. A chipmunk is 17 meters away from its burrow and can run 4 m/s. The fox is 30 meters away from the burrow and can run 8 m/s. What time does the
chipmunk get there?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."