10th science Refresher Course-2-FLUIDS-answer key
10th science Refresher Course-2-FLUIDS-answer key
10th science Refresher Course 2 Answer English Medium
unit 2 FLUIDS Refresher Answer
EVALUATION
I. Fill in the blanks.
1. Unit of Force is ____________
Answer : newton (N)
2. Force has both magnitude and direction. It is a ____________ quantity.
Answer : vector
3. Pressure exerted by a liquid is increased by____________ density of the liquid height of the liqui
Answer : column
4. SI Unit of pressure is ____________
Answer : pascal / N/M2
5. The air that exerts pressure in the atmosphere is called ____________
Answer : atmospheric pressure
6. The depth of a liquid column increases and the ____________ also increases.
Answer : pressure
7. The instrument used to measure atmospheric pressure is ____________
Answer : barometer
8. A simple barometer was fi st constructed by ____________.
Answer : Torricelli
9. A drinking straw works on the ____________
Answer : atmospheric pressure / exsistence of air pressure
10.Rain drops take up spherical shape naturally due to the ____________
Answer : surface tension of water.
II. State true or false.
1. Hydraulic press works on the principle of Pascal’s law.
Answer : True
2. Density of water is less than density of cooking oil.
Answer : False.
3. Salt water provides more buoyant force than fresh water.
Answer : True
4. Liquid exerts pressure in the bottom as well as on the walls of the container.
Answer : True
5. A body will sink if the weight of the body is greater than the buoyant force
Answer : True
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