Class X

Absorption or release of thermal energy changes the
  1. External energy of matter
  2. Internal energy of matter
  3. A both internal and external energy of matter
  4. None of energies
Energy is
  1. Ability to do work
  2. Capacity of power
  3. Efficiency
  4. Nput
 Speed of truck is 40 m s-1, after 10 seconds its speed decreases to 20 m s-1, its acceleration is
  1. −1 m s-1
  2. −2 m s-1
  3. −4 m s-1
  4. −5 m s-1
Centigrade (Celsius) scale can be converted into Kelvin scale by formula
  1. Ω °C = Temperature in Kelvin + 273
  2. Ω °C = Temperature in Kelvin - 273
  3. Ω °C = Temperature in Fahrenheit + 273
  4. Ω °C = Temperature in Fahrenheit - 273
 Assuming heat capacity of a 10 g of water to be 42 J ⁄ K, heat required to raise its temperature from 25 °C to 35 °C would be
  1. 42 J
  2. 420 J
  3. 4200 J
  4. None of above
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