Consider of one blue and has a charge of + 20 C and a second has a charge of -12 C

a.) What is the total amount of charge when they are brought together and touch?

b.) if they are then separated what is the amount ? charge on each sphere

c.) Did electrons move from the negative balloon to the positive balloon, or did protons from the positive balloon move to the negative balloon?

d.) Will the two balloons be attracted or repelled by each other? Explain your answer.

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?

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?