Gravity on earth is 9.8 m/s^2, and gravity on jupiter is 23.1 m/s^2. so, if the mass of a rock is 70 kilograms, it's weight on earth and its weight on jupiter ?

686 N, 1617 N

Explanation:

Gravity on earth, ge = 9.8 m/s^2

Gravity on Jupiter, gj = 23.1 m/s^2

m = 70 kg

Weight on earth, We = m x ge = 70 x 9.8 = 686 N

Weight on Jupiter, Wj = m x gj = 70 x 23.1 = 1617 N

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.