21. Kerosene oil rises up in the wick of lantern because of
22. A liquid is kept in a glass beaker. Which one of the following statements is correct regarding the pressure exerted by the liquid column at the base of the beaker?
23. Which of the following statements is incorrect?
24. What is the force acting perpendicular to plane?
25. Consider the following statements.
1. The SI unit of young's modulus of elasticity is N/M2.
2. The reciprocal of the bulk modulus of the material of the body is called the compressibility of that material.
3. Compressibility of gases is very small.
Which of the statements given above are correct?
1. The SI unit of young's modulus of elasticity is N/M2.
2. The reciprocal of the bulk modulus of the material of the body is called the compressibility of that material.
3. Compressibility of gases is very small.
Which of the statements given above are correct?
26. The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. Why?
Following are some options
Following are some options
27. A sudden fall in barometer reading indicates that the weather will be
28. For which one of the following capillarity is not the only reason?
29. When an air bubble at the bottom of lake rises to the top, it will
30. Consider the following statements.
1. The viscosity of a gas increases with rise in temperature.
2. The viscosity of the liquid falls very rapidly with rise in temperature.
Which of the statement(s) given above is/are correct?
1. The viscosity of a gas increases with rise in temperature.
2. The viscosity of the liquid falls very rapidly with rise in temperature.
Which of the statement(s) given above is/are correct?
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