Physical Science Measurement of length area volume and time

 PHYSICAL SCIENCE Measurement of length, area, volume and time.

Here is an extensive collection of short-answer and objective-type questions and answers on the measurement of length, area, volume, and time. These questions are designed to cover a wide range of concepts relevant to competitive exams in physical science.

Measurement of Length

1. Q1: What is the SI unit of length?
   
   A1: Meter (m).

2. Q2: Convert 5 kilometers to meters.
   
   A2: 5,000 meters.

3. Q3: How many centimeters are in a meter?
   
   A3: 100 centimeters.

4. Q4: What tool is used to measure small lengths accurately?
   
   A4: A micrometer screw gauge.

5. Q5: What is the length of an object that is 3 meters 50 centimeters long?
   
   A5: 3.5 meters.

6. Q6: How do you convert millimeters to meters?
   
   A6: Divide the number of millimeters by 1,000.

7. Q7: What is the length of a standard classroom in meters if it is 10 meters long?
   
   A7: 10 meters.

8. Q8: How many meters are there in 1.5 kilometers?
   
   A8: 1,500 meters.

9. Q9: Which instrument is used to measure the diameter of a thin wire?
   
   A9: A vernier caliper.

10. Q10: What is the least count of a standard meter scale?
    
    A10: 1 millimeter (0.001 meters).

Measurement of Area

11. Q11: What is the SI unit of area?
    
    A11: Square meter (m²).

12. Q12: Convert 2 hectares to square meters.
    
    A12: 20,000 square meters.

13. Q13: How do you calculate the area of a rectangle?
    
    A13: Length × Width.

14. Q14: What is the area of a circle with a radius of 5 meters?
    
    A14: $\pi \times 5^2 = 78.54$ square meters (approx).

15. Q15: How do you convert square centimeters to square meters?
    
    A15: Divide the number of square centimeters by 10,000.

16. Q16: What is the area of a triangle with a base of 6 meters and height of 4 meters?
    
    A16: $\frac{1}{2} \times 6 \times 4 = 12$ square meters.

17. Q17: How many square meters are in a square kilometer?
    
    A17: 1,000,000 square meters.

18. Q18: What is the area of a square with each side measuring 7 meters?
    
    A18: $7^2 = 49$ square meters.

19. Q19: Convert 500 square feet to square meters.
    
    A19: Approximately 46.45 square meters.

20. Q20: How is the area of a parallelogram calculated?
    
    A20: Base × Height.

Measurement of Volume

21. Q21: What is the SI unit of volume?
    
    A21: Cubic meter (m³).

22. Q22: How many liters are in a cubic meter?
    
    A22: 1,000 liters.

23. Q23: What is the volume of a cube with each side measuring 4 meters?
    
    A23: $4^3 = 64$ cubic meters.

24. Q24: How do you convert milliliters to liters?
    
    A24: Divide the number of milliliters by 1,000.

25. Q25: What is the volume of a cylinder with a radius of 3 meters and height of 10 meters?
    
    A25: $\pi \times 3^2 \times 10 = 282.74$ cubic meters (approx).

26. Q26: Calculate the volume of a sphere with a radius of 6 meters.
    
    A26: $\frac{4}{3} \pi \times 6^3 = 904.32$ cubic meters (approx).

27. Q27: How many cubic centimeters are there in a liter?
    
    A27: 1,000 cubic centimeters.

28. Q28: What is the volume of a rectangular prism with dimensions 5m × 3m × 2m?
    
    A28: $5 \times 3 \times 2 = 30$ cubic meters.

29. Q29: Convert 2.5 gallons to liters (1 gallon = 3.785 liters).
    
    A29: 9.46 liters.

30. Q30: What is the volume of a cone with a radius of 4 meters and height of 9 meters?
    
    A30: $\frac{1}{3} \pi \times 4^2 \times 9 = 452.39$ cubic meters (approx).

Measurement of Time

31. Q31: What is the SI unit of time?
    
    A31: Second (s).

32. Q32: Convert 3 hours to seconds.
    
    A32: 10,800 seconds.

33. Q33: How many milliseconds are there in a second?
    
    A33: 1,000 milliseconds.

34. Q34: What is the conversion factor from minutes to seconds?
    
    A34: Multiply by 60.

35. Q35: How many hours are there in a day?
    
    A35: 24 hours.

36. Q36: What is the duration of 2 hours 30 minutes in minutes?
    
    A36: 150 minutes.

37. Q37: Convert 5 days to hours.
    
    A37: 120 hours.

38. Q38: How many seconds are in 1.5 minutes?
    
    A38: 90 seconds.

39. Q39: How many weeks are in a year?
    
    A39: Approximately 52 weeks.

40. Q40: What is the time conversion factor from hours to seconds?
    
    A40: Multiply by 3,600.

Mixed Questions (Length, Area, Volume, Time)

41. Q41: Convert 500 square meters to hectares.
    
    A41: 0.05 hectares.

42. Q42: What is the volume of a cuboid with dimensions 4m × 5m × 6m?
    
    A42: 120 cubic meters.

43. Q43: How many liters are in a volume of 2 cubic meters?
    
    A43: 2,000 liters.

44. Q44: Calculate the area of a circle with a diameter of 10 meters.
    
    A44: $\pi \times 5^2 = 78.54$ square meters (approx).

45. Q45: How many seconds are there in 3 hours 45 minutes?
    
    A45: 13,500 seconds.

46. Q46: Convert 250 millimeters to centimeters.
    
    A46: 25 centimeters.

47. Q47: What is the area of a square plot with each side measuring 12 meters?
    
    A47: $12^2 = 144$ square meters.

48. Q48: How many cubic feet are in 1 cubic meter?
    
    A48: Approximately 35.31 cubic feet.

49. Q49: Convert 7.5 liters to cubic centimeters.
    
    A49: 7,500 cubic centimeters.

50. Q50: What is the time in hours for 5,000 seconds?
    
    A50: Approximately 1.39 hours.

51. Q51: How many square feet are in 1,000 square meters?
    
    A51: Approximately 10,764 square feet.

52. Q52: What is the volume of a tank that holds 500 liters of water in cubic meters?
    
    A52: 0.5 cubic meters.

53. Q53: Convert 120 minutes into hours.
    
    A53: 2 hours.

54. Q54: How many cubic inches are in a cubic meter?
    
    A54: Approximately 61,024 cubic inches.

55. Q55: What is the area of a trapezoid with bases 8m and 5m, and height 4m?
    
    A55: $\frac{1}{2} \times (8 + 5) \times 4 = 26$ square meters.

56. Q56: Convert 3.5 hours into minutes.
    
    A56: 210 minutes.

57. Q57: What is the length of a pipe that has a volume of 50 cubic meters and a diameter of 2 meters?
    
    A57: Approximately 15.92 meters (using $L = \frac{V}{\pi r^2}$).

58. Q58: Calculate the area of a rectangle with length 20 cm and width 15 cm.
    
    A58: $20 \times 15 = 300$ square centimeters.

59. Q59: How many cubic meters are in 500 liters?
    
    A59: 0.5 cubic meters.

60. Q60: What is the volume of a box measuring 2 meters × 3 meters × 4 meters?
    
    A60: 24 cubic meters.

61. Q61: Convert 2.5 liters to milliliters.
    
    A61: 2,500 milliliters.

62. Q62: How many hours are in 6,000 seconds?
    
    A62: 1.67 hours.

63. Q63: What is the area of a rectangle with length 25 meters and width 10 meters?
    
    A63: 250 square meters.

64. Q64: How many seconds are in 2.5 hours?
    
    A64: 9,000 seconds.

65. Q65: Convert 500 square inches to square centimeters.
    
    A65: Approximately 3,225 square centimeters.

66. Q66: What is the volume of a cylinder with a radius of 2 meters and height of 5 meters?
    
    A66: $\pi \times 2^2 \times 5 = 62.83$ cubic meters (approx).

67. Q67: Calculate the time in minutes for 720 seconds.
    
    A67: 12 minutes.

68. Q68: How many liters are there in a cubic centimeter?
    
    A68: 0.001 liters.

69. Q69: What is the area of a circle with a circumference of 31.4 meters?
    
    A69: $\pi r^2 = \frac{31.4^2}{4\pi} = 78.54$ square meters (approx).

70. Q70: Convert 250 cubic meters to liters.
    
    A70: 250,000 liters.

71. Q71: How many hours are in 150 minutes?
    
    A71: 2.5 hours.

72. Q72: What is the volume of a cone with height 7 meters and radius 3 meters?
    
    A72: $\frac{1}{3} \pi \times 3^2 \times 7 = 197.92$ cubic meters (approx).

73. Q73: Convert 2,000 milliliters to liters.
    
    A73: 2 liters.

74. Q74: How many square meters are in a 10,000 square centimeter area?
    
    A74: 1 square meter.

75. Q75: What is the length of a rope if it measures 300 centimeters?
    
    A75: 3 meters.

76. Q76: Calculate the volume of a sphere with a radius of 3 meters.
    
    A76: $\frac{4}{3} \pi \times 3^3 = 113.10$ cubic meters (approx).

77. Q77: How many days are there in 2 weeks?
    
    A77: 14 days.

78. Q78: Convert 10 cubic feet to cubic meters.
    
    A78: Approximately 0.283 cubic meters.

79. Q79: What is the area of a square with a side of 8 meters?
    
    A79: $8^2 = 64$ square meters.

80. Q80: Convert 100 liters to cubic meters.
    
    A80: 0.1 cubic meters.

81. Q81: How many hours are in 2.5 days?
    
    A81: 60 hours.

82. Q82: Calculate the volume of a rectangular prism with dimensions 3 m × 4 m × 5 m.
    
    A82: 60 cubic meters.

83. Q83: What is the area of a parallelogram with a base of 7 meters and height of 5 meters?
    
    A83: $7 \times 5 = 35$ square meters.

84. Q84: Convert 4 hours 15 minutes to minutes.
    
    A84: 255 minutes.

85. Q85: How many cubic centimeters are in a liter?
    
    A85: 1,000 cubic centimeters.

86. Q86: What is the area of a triangle with a base of 9 meters and height of 6 meters?
    
    A86: $\frac{1}{2} \times 9 \times 6 = 27$ square meters.

87. Q87: Convert 3 days to hours.
    
    A87: 72 hours.

88. Q88: What is the volume of a box with dimensions 2 meters × 3 meters × 2 meters?
    
    A88: 12 cubic meters.

89. Q89: How many square meters are there in 1,500 square feet?
    
    A89: Approximately 139.35 square meters.

90. Q90: Convert 3 liters to cubic centimeters.
    
    A90: 3,000 cubic centimeters.

91. Q91: What is the length of an object that is 1 meter 75 centimeters long?
    
    A91: 1.75 meters.

92. Q92: How many square meters are in a hectare?
    
    A92: 10,000 square meters.

93. Q93: What is the volume of a sphere with a radius of 2 meters?
    
    A93: $\frac{4}{3} \pi \times 2^3 = 33.51$ cubic meters (approx).

94. Q94: Convert 8 gallons to liters (1 gallon = 3.785 liters).
    
    A94: Approximately 30.28 liters.

95. Q95: What is the area of a rectangle with length 12 cm and width 5 cm?
    
    A95: 60 square centimeters.

96. Q96: Calculate the volume of a cylinder with a height of 10 cm and a radius of 5 cm.
    
    A96: $\pi \times 5^2 \times 10 = 785.4$ cubic centimeters (approx).

97. Q97: How many hours are there in 90 minutes?
    
    A97: 1.5 hours.

98. Q98: Convert 2 cubic meters to liters.
    
    A98: 2,000 liters.

99. Q99: What is the area of a circle with a radius of 3 meters?
    
    A99: $\pi \times 3^2 = 28.27$ square meters (approx).

100. Q100: How many seconds are there in 1 hour 20 minutes?
     
     A100: 4,800 seconds.

101. Q101: Calculate the time in seconds for 1.5 hours.
     
     A101: 5,400 seconds.

102. Q102: What is the volume of a cube with side length 10 centimeters?
     
     A102: $10^3 = 1,000$ cubic centimeters.

103. Q103: Convert 0.5 liters to cubic meters.
     
     A103: 0.0005 cubic meters.

104. Q104: What is the area of a hexagon with side length 5 meters?
     
     A104: $\frac{3\sqrt{3}}{2} \times 5^2 \approx 64.95$ square meters.

105. Q105: How many square inches are there in a square meter?
     
     A105: Approximately 1,550 square inches.

These questions and answers provide a thorough overview of the measurement concepts in length, area, volume, and time, covering conversions, calculations, and practical applications.