In a battery (voltaic cell), in which direction does conventional current flow? a. from The negative to a positive electrode
b. from the sink plate to the copper plate
c. from the sink copper plate to the sink plate
d. from the top of the plates to the bottom

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?

What is the relationship between the direction of motion of the balloon and the wind currents

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2