Porque hay hielo seco en la industria en vez del nitrogeno liquido?​

=force × distance a. work b. velocity c. pressure d. momentum

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?