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  1. Heat required to raise the temperature of 1 kg water from 0'C to 100'C = 1 x 4200 x...

  2. Heat needed to raise the temperature of 5 kg of water from 25'C to 100'C = 5 x 4200...

  3. Mass of water = 320 L * 1kg L^-1 = 320kg Energy to raise 320 L from 20deg.C to 40deg.C = 4200 J kg^-1 C^-1 * 320kg * (40-20) = 26880 kJ

  4. ...that is l/5 X 1/2 = l/10 vertically down the table. In order to raise the whole rope to the table, we just need to raise the portion of the hanging rope...

  5. ... heat capacity is defined as the heat required to raise the temperature of unit mass of a substance by 1 degree Celsius. The unit...

  6. ... specific heat capacity of a substance is the heat (energy) needed to raise 1 kilogram of the substance by 1 degree Celsius. (In other words...

  7. 1. Height raised by the 3 kg mass = (1 -1 x cos(60)) m = 0.5 m Speed of the 3 kg mass before...

  8. ...with a known charge, say positive charge. The gold leaf of the electroscope raises . Suppose insulator A srubbed against insulator B. If ...

  9. ...by ice if all of it is melted and its temperature is raised to 100'C = (1 x 334000 + 1 x 4200 x 100) J = 754 000 J where...

  10. ... not clear. I presume you refer to the electrical energy involved in raising the indoor air temperature by a certain amount. In fact, the physical process ...