What Grade do you think I'm in?

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

The two required components for a generator