a. Viscosity of gases _____with temperature (increase/decrease) b. For a fluid in steady flow, the increase in flow speed

Question

1. Fill in the blanks using the word from the list appended with each statement.

(a). Viscosity of gases _____with temperature (increase/decrease)

(b). For a fluid in steady flow, the increase in flow speed at a constriction follows from_____ (conservation of mass/Bernoulli’s theorem)

(c). The working of a hydraulic lift is based on (Pascal’s Law/ principle of Conservation of Energy)

(d) Small insects can walk over the surface of water. It is due to the_____(surface tension of water/viscosity of water)

2. A girl dips a thin capillary tube in water. Water rises through it.

(a). Name the phenomenon.

(b). How does this rise vary with the diameter of the tube?

Answer 1

1. Fill in the blanks :

(a) increases

(b) Conservation of mass

(c) Pascals law

(d) Surface tension

2. A girl dips a thin capillary tube in water:

(a). Capillary rise

(b). h α 1/r ie. when diameter of tube increases, the. capillary rise decreases.