Awrench 20 cm long lies along the positive y-axis and grips a bolt at the origin. a force is applied in the direction 0, 4, −3 at the end of the wrench. find the magnitude of the force needed to supply 150 n · m of torque to the bolt. (round your answer to the nearest whole number)

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?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Which of the following is not am example of a polymer? protein nylon kevlar concreta