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
When solid is changing to liquid, at that period temperature
  1. Increases
  2. Decreases
  3. Remains constant
  4. May increase or decrease
Formula for work done is
  1. F × s, where F is force and s is displacement
  2. F/s, where F is force and s is displacement
  3. F + s, where F is force and s is displacement
  4. F -s, where F is force and s is displacement
Zinc as specific heat capacity of
  1. 250 J kg-1 °C-1
  2. 315 J kg-1 °C-1
  3. 390 J kg-1 °C-1
  4. 415 J kg-1 °C-1
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
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