Class VII

Device used for measuring temperatures is called a
  1. Barometer
  2. Odometer
  3. Thermometer
  4. Speedometer ☛
An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will
  1. flow from iron ball to water
  2. not flow from iron ball to water or from water to iron ball.
  3. flow from water to iron ball
  4. increase the temperature of both.
A Thermos flask prevents loss or gain of heat by
  1. conduction only
  2. convection only
  3. radiation only
  4. all the above
Unit of heat energy is
  1. kilogram
  2. metre
  3. joule
  4. degree
Bodies transmitting heat via radiation
  1. do not require any medium
  2. are liquids only
  3. make heat travels in one direction only.
  4. solids only.
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