1) Two bodies made of the same material have the same external dimensions and appearance, but one is solid and the other is hollow. When they are heated, for the same change in temperature is the overall volume expansion the same or different? 2) Two bodies made of the same material have the same external dimensions and appearance, but one is solid and the other is hollow. When they are heated, is the overall volume expansion the same or different?

Both the questions are different. Plz ans it fast

Explain vector addition, triangle method and parallelogram method

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?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.