How is the thermal efficiency of a heat engine defined?

The dot diagram represents the motion of the motorcycle as it moves from left to right

The energy released by a nuclear fusion reaction is produced when

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward