31. What is the pressure inside the aircraft cabin at altitude?
32. The surface tension of water on adding detergent to it
33. The Young's modulus for perfectly rigid body is
34. The speed increases of ships is based on-
35. A drop of a fluid is combined because the attraction of its particles minimizes its possible area. This phenomenon is called-
36. The spring constant of a spring depends on its
37. The friction in liquids is called:
38. What will be the buoyancy force exerted by the water?
39. Which of the following is dimension of pressure-
40. Which of the following substance density is greater than the density of water?
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