3. What is a manometer used to determine? A the difference between two densities
B the difference between two forces
C the difference between two heights
D the difference between two pressures

What is the difference between electrically neutral objects and electrically charged objects

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

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?