Jack travelled 360 km at an average speed of 80 km/h. elaine
took 1.5 hours more to complete the same amount of distance.
what was elaine's average speed for the whole journey?
km/h

Are aliens real? justify you’re answer.

Which accurately compares concave and convex lenses?

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above