Calculate the moment if you were to hold a 15 lb bowling ball with your arm straight out and your forearm perpendicular to your body. What is the pinned connection

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is