1. A 5.0 kg and a 10 kg sphere are 0.3 m apart (center-to-center distance). Find the force of attraction between them.

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.

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

f is prop to m1xm2 double m1 double force