A block of ice of 10 gm at - 10°C is slowly heated and converted to steam at 100°C, calculate amount of heat required to change ice at -10°C to steam at 100°C (specific heat ofice is 0.5 cal/gm°C and latent heat of ice 80 cal/gm and latent heat of vaporization of water is 540 cal/gm and Sw=1cal/gm/°C)​

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?

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

Which one of the following research methods can show cause and effect