How can water and gravity work together to erode soil, sediment, and rock?

What are some natural measures of time

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals