Class X

As collision of particles in liquids and gases is lesser, so flow of kinetic energy would be
  1. Faster
  2. Slower
  3. Normal
  4. Zero
As volume is inversely proportional to pressure, we can conclude that
  1. p1V2 = p2V1
  2. p2/V2 = p1V1
  3. p1V1 = p2V2
  4. p1V1 = p2/V2
Force due to pull of gravity is called
  1. Weight
  2. Force
  3. Mass
  4. Tension
Melting point of tin is
  1. 32 °C
  2. 132 °C
  3. 232 °C
  4. 332 °C
A wooden trolley of mass 20 kg accelerates at 2 m s-2, if force due to engine is 50 N, friction force is equal to
  1. 1 N
  2. 10N
  3. -10 N
  4. None of above
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