1- A baseball player was running before he fell down on the ground.
a. What type of friction is there?
b. Draw the free body diagram (box with arrows) of the player
before he stops? The length of the force arrows matters
(magnitude of the force in Newton). You can give any
arbitrary number to the force arrows.
c. Draw the free diagram of the player after he stops?
450 N

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?

Why should seat belts not be mandatory quick plz

What is the rate of change in a objects position?