50 Important General Science Question and Answers 05 | santhoshnair.net

50 Important General Science Question and Answers 05

50 Important General Science Question and Answers 05

01. Force acts when two bodies role one another? - Rolling friction
02. Force of attraction between unlike molecules is termed as? - Adhesion
03. Water drop sticks on the glass surface is an example of ___ force? - Adhesion
04. Force of attraction between like molecules is termed as? - Cohesion
05. Water molecules join together is an example of ____ force? - Cohesion
06. Frictional force acting between parallel layers of a liquid is called? - Viscosity
07. Unit of viscosity is? - Poise
08. With the increase in temperature, viscosity .? - Decreases
09. The viscosity of the gas is less than the viscosity of? - Liquid
10. The viscosity of an ideal fluid is? - Zero
11. Liquids having low viscosity are called? - Mobile liquids eg: Water, Kerosene, Alcohol, Petro
12. Fluids flow with zero viscosity is called? - Superfluids eg: Honey, Coaltar, Glycerine etc
13. The property of a liquid by which the free surface of liquid acts like a stretched membrane? - Surface tension
14. Surface tension is caused due to? - The unbalanced molecular cohesive force
15. Surface tension is inversely proportional to temperature and? - Pressure
16. The surface tension of hot water is less than that of? - Cold water
17. Insects walking over the water surface can be explained by? - The surface tension of water
18. The spherical shape of raindrops can be explained by? - The surface tension of water
19. The capillary phenomenon is due to? - surface tension
20. The rise of water level in plants is due to? - surface tension
21. The ability of a body to return to its original shape is called? - Elasticity
22. The force per unit area is called? - Pressure [Pressure = Force/Area]
23. The SI Unit of pressure=? - Pascal or N/m2
24. Unit of thrust is? - Newton
25. CGS unit of thrust is? - dyne /cm2
26. Force acts more on objects having? - Low Surface area
27. Atmospheric pressure =___ ? - 760mm of Mercury
28. Unit of Atmospheric pressure? - Bar 1 bar = 10^5 pascal
29. The pressure at sea level is taken as the? - Standard Atmospheric Pressure
30. The barometer is used to calculate? - Atmospheric Pressure
31. The liquid used in Barometer? - Mercury
32. Sudden fall of mercury level in Barometer indicates? - Storm
33. The rising level of mercury in Barometer indicates? - Calm climate
34. Force of attraction between any two bodies in the universe is called? - Gravitation
35. Law of gravitation was discovered by? - Sir Isaac Newton
36. Weakest force in nature? - Gravitational Force
37. The force keeps the earth and other planetary objects in their orbits around the sun? - Gravitational Force
38. The acceleration with which the freely falling bodies are attracted towards the earth is called the? - Acceleration due to gravity (g)
39. The weight of a freely falling body? - Zero
40. At the Center of earth Acceleration due to gravity (g) is? - zero
41. Acceleration due to gravity (g) is maximum at? - polar regions
42. Acceleration due to gravity (g) is minimum at? - Equatorial regions
43. Universal Law of Gravitation was put forward by? - Sir Isaac Newton
44. The 'g' is maximum on Jupiter and minimum on the planet? - Mercury
45. Astronaut cannot drink lemonade with the help of a straw because? - There is no atmosphere on the moon
46. Minimum speed which a body must have to escape from the earth's gravitational force is called? - Escape Velocity
47. Escape velocity of moon? - 2.4 km/s
48. Escape velocity of earth? - 11.2km/s
49. Escape velocity of planet Jupiter? - 60km/s
50. Escape velocity of planet Mercury? - 4.2km/s

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