Class X

Temperature of core of earth is equal to 3727 °C. This temperature in Kelvins is equal to
  1. 4000 K
  2. 3727 K
  3. 3454 K
  4. None of above
Unit for specific latent heat is
  1. Watts per Joule
  2. Joules per Watt
  3. Joules per Kilogram
  4. Pascal per Watt
If specific latent heat of fusion of ice is 340 kJ ⁄ kg, heat required to melt ice of 100 g would be
  1. 34 J
  2. 3400 J
  3. 34000 J
  4. 34 MJ
Specific heat capacity of glass is
  1. 635 J kg-1 °C-1
  2. 670 J kg-1 °C-1
  3. 705 J kg-1 °C-1
  4. 740 J kg-1 °C-1
 If an object is stationary which force is still acting on it?
  1. Friction
  2. Tension
  3. Weight
  4. Resistance
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