Why are time machines not invented?

you push a book a distance of 5 meters with a force of 10 newtons for 2 seconds how much work did you do on the book

Is a gallon of gasoline stored energy

Scientist accept ideas of the past and do not try to revise or change them

How does natural selection impact competition

What would happen when there is a collision between two objects having unequal masses

Who is known as the father of toxicology

In which layer of the sun is energy transfferred between atoms?

A 63 kg object needs to be lifted 7 meters in a matter of 5 secound. Approximately how much horsepower is required to achieve in the task

If you ere to continue the investigation, what would you suggest as a next step? and Can you determine the identity of an unknown substance by calculating its densitu and observing chemical reactions?

A small cylinder made of a diamagnetic material is brought near a bar magnet. One end of the cylinder is brought near the North pole of the magnet and is repelled.