How much work do you do when you pick up 200 books, each with a mass of 1.2 kg and place them on a 1.8-meter-high shelf?

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

Could we see a galaxy that is 20 billion light-years away?