An engine takes in 200 J of heat, expels 80 J of heat, and does 120 J of work. What is the efficiency of the engine? (Use e =Westery
A. 40%
B. 60%
C. 20%
D. 80%

The mentor is usually a peer of the individual that acts as a role model and the individual get started in adult life.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)