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41
Why it is easier to swim in the sea than in a river?
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Answer: Option A
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42
The working of venturimeter is based on
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Answer: Option C
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43
The pressure in a liquid at a given depth below the surface
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Answer: Option A
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44
With the rise of temperature, the viscosity of liquid
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Answer: Option B
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45
If the area is small for a given force, the pressure will be-
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Answer: Option C
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46
Oil spreads on water surface because
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Answer: Option D
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47
Cohesive force is experienced between
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Answer: Option C
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48
As the depth increases from the free surface of a fluid, the pressure exerted by the liquid will be-
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Answer: Option C
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49
Which of the following elements was first produced artificially?
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Answer: Option D
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50
What is the thrust per unit area called?
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Answer: Option C
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