A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is

Explanation:

Distance=10km

Time=30min=0.5hr

So,speed=10/0.5

So,speed=20km/hr

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.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr