The force acting in the connecting rod of a engine cylinder is f = 9000 n and the crank radius r = 75 mm. if the crank makes 4200 revolutions in 1.2 minutes, then find the brake work (wb) in kilowatts.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?