Class X

 If two forces of 3 N acting on an object in opposite direction. resultant force will be
  1. 6 N
  2. 3 N
  3. 9 N
  4. Zero
Temperature in core of earth is equal to 4000 K, which is equal to
  1. −3727 °C
  2. 3727 °C
  3. 4273 °C
  4. −4273 °C
Process in which thermal energy is transferred by emission of infrared radiations is termed as
  1. Conduction
  2. Convection
  3. Radiation
  4. Conduction and Radiation
Melting point of wax is
  1. 37 °C
  2. 47 °C
  3. 57 °C
  4. 67 °C
Process of transfer of thermal energy without any flow of material medium is called
  1. Conduction
  2. Convection
  3. Radiation
  4. None of above
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