The center of this seesaw is used to balance the board with the seats. the children can easily move up and down without much force. the seesaw is an example of wich simple machine?

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?