Class XI

The specific gravity of a material is
  1. the ratio of its mass to the mass of water
  2. the ratio of its volume to the density of water
  3. the ratio of its density to the density of water
  4. the ratio of its mass to the density of water
Gauge pressure at a point is
  1. pressure at that point – atmospheric pressure
  2. (pressure at that point + atmospheric pressure)/2
  3. (pressure at that point – atmospheric pressure)/2
  4. pressure at that point + atmospheric pressure
The units of pressure in SI system is
  1. Pascal
  2. Newton
  3. Watt
  4. Joule
Flow is said to be steady if
  1. the flow rate decreases 10%% every second
  2. the flow rate increases with time
  3. the flow rate does not change with time
  4. the flow rate decreases 20%% every second
Pressure p at any point in a fluid at rest is
  1. the normal force at that point per unit area
  2. the normal force at that point per unit mass
  3. the normal force at that point per unit volume
  4. the force parallel to area at that point per unit area
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