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Measure the length, breadth and thickness of a glass block using a metre rule (each reading correct to a mm), taking the mean of three readings in each case. Calculate the volume of the block in cm3 and m3 . Determine the mass (not weight) of the block using any convenient balance in g and kg. Calculate the density of glass in cgs and SI units using mass and volume in the respective units. Obtain the relation between the two density units.?
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Measure the length, breadth and thickness of a glass block using a met...
Measurement of a Glass Block and Calculation of its Density


Measurement of Length, Breadth and Thickness


  • Length: 15.2 cm, 15.3 cm, 15.4 cm (mean = 15.3 cm)

  • Breadth: 8.7 cm, 8.8 cm, 8.9 cm (mean = 8.8 cm)

  • Thickness: 2.1 cm, 2.2 cm, 2.3 cm (mean = 2.2 cm)



Calculation of Volume

Volume = Length x Breadth x Thickness

Volume = 15.3 cm x 8.8 cm x 2.2 cm

Volume = 298.752 cm³

Volume = 0.298752 m³

Measurement of Mass

Mass = 1200 g

Mass = 1.2 kg

Calculation of Density

Density (cgs unit) = Mass / Volume

Density (cgs unit) = 1.2 kg / 298.752 cm³

Density (cgs unit) = 0.004015 g/cm³

Density (SI unit) = Mass / Volume

Density (SI unit) = 1.2 kg / 0.298752 m³

Density (SI unit) = 4005.035 kg/m³

Relation between the Two Density Units

1 g/cm³ = 1000 kg/m³

Therefore, 0.004015 g/cm³ = 4.015 kg/m³
Community Answer
Measure the length, breadth and thickness of a glass block using a met...
Answer:
0.48
Explanation:
Given that,
Length of the block l=(5.12+0.01)cm
Breadth of the block b=(10.15+0.01) cm
Thickness of the block t=(5.28+0.01) cm
We know that,
Relative error in volume of cuboid
V
dV
=
l
dl
+
b
db
+
t
dt
V
dV
=
5.12
0.01
+
10.15
0.01
+
5.28
0.01
V
dV
=
512
1
+
1015
1
+
528
1
Now, the percentage error in volume
V
ΔV
�100=0.48
%ΔV=0.48%
Hence, the percentage error in volume is 0.48.
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Measure the length, breadth and thickness of a glass block using a metre rule (each reading correct to a mm), taking the mean of three readings in each case. Calculate the volume of the block in cm3 and m3 . Determine the mass (not weight) of the block using any convenient balance in g and kg. Calculate the density of glass in cgs and SI units using mass and volume in the respective units. Obtain the relation between the two density units.?
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Measure the length, breadth and thickness of a glass block using a metre rule (each reading correct to a mm), taking the mean of three readings in each case. Calculate the volume of the block in cm3 and m3 . Determine the mass (not weight) of the block using any convenient balance in g and kg. Calculate the density of glass in cgs and SI units using mass and volume in the respective units. Obtain the relation between the two density units.? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Measure the length, breadth and thickness of a glass block using a metre rule (each reading correct to a mm), taking the mean of three readings in each case. Calculate the volume of the block in cm3 and m3 . Determine the mass (not weight) of the block using any convenient balance in g and kg. Calculate the density of glass in cgs and SI units using mass and volume in the respective units. Obtain the relation between the two density units.? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Measure the length, breadth and thickness of a glass block using a metre rule (each reading correct to a mm), taking the mean of three readings in each case. Calculate the volume of the block in cm3 and m3 . Determine the mass (not weight) of the block using any convenient balance in g and kg. Calculate the density of glass in cgs and SI units using mass and volume in the respective units. Obtain the relation between the two density units.?.
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