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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

Explain why electric current cannot exist if a current doesn't have a voltage source.

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?