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In an experiment, on determining the density of a rectangular block, the dimensions of the block are measured with a vernier calipers (with a least count of 0.01 cm) and its mass is measured with a beam balance of least count 0.1 g
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0
|
3954
|
August 16, 2016
|
|
Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations
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1
|
1188
|
August 16, 2016
|
|
Precise measurements of physical quantities are a need of science
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|
1
|
512
|
August 16, 2016
|
|
It is required to find the volume of a rectangular block
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1
|
5558
|
August 16, 2016
|
|
Suppose we use a physical balance to measure the mass of an object and find the mean value of our observations to be 156.28 g
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0
|
2312
|
August 16, 2016
|
|
The two specific heat capacities of a gas are measured as Cp = (12.28 ± 0.2) units and Cv = (3.97 ± 0.3) units. Find the value of the gas constant R
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|
0
|
4040
|
August 16, 2016
|
|
A small error in the measurement of the quantity having the highest power (in a given formula), will contribute maximum percentage error in the value of the physical quantity to whom it is related. Explain why?
|
|
0
|
1655
|
August 16, 2016
|
|
The length and breadth of a rectangular block are 25.2 cm and 16.8 cm, which have both been measured to an accuracy of 0.1 cm. Find the area of the rectangular block
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|
0
|
6493
|
August 16, 2016
|
|
The radius of a sphere is measured as (2.1 ± 0.5) cm. Calculate its surface area with error limits
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|
0
|
15893
|
August 16, 2016
|
|
A book with many printing errors contains four different formulae for the displacement y of a particle undergoing a certain periodic motion:
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|
1
|
1982
|
August 16, 2016
|
|
Mention the number of significant figure in:
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|
1
|
441
|
August 16, 2016
|
|
Answer the following:
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1
|
650
|
August 16, 2016
|
|
A famous relation in physics relates 'moving mass' m to the 'rest mass' tn0 of a particle in terms of its speed v and speed of light c
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|
1
|
1962
|
August 16, 2016
|
|
What is scientific notation?
|
|
0
|
867
|
August 16, 2016
|
|
Dimensional formula of magnetic flux density (B) can be calculated from the relation F = qv Bsin , where F is force, q is charge, v is velocity and is an angle. Find [B]
|
|
0
|
12378
|
August 16, 2016
|
|
Give some physical quantities having same dimentional formulae as well as same units
|
|
0
|
1002
|
August 16, 2016
|
|
Mention some physical quantities having same dimensional formulae but different units
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|
0
|
14958
|
August 16, 2016
|
|
The mass of a box measured by a grocer's balance is 2.3 kg
|
|
1
|
11373
|
August 16, 2016
|
|
Length, breadth and thickness of a metal piece are 4.234 m, 1.005 m and 2.01 cm respectively. Find its area and volume to correct significant figures
|
|
0
|
866
|
August 16, 2016
|
|
Show that a calorie has a magnitude
|
|
1
|
628
|
August 16, 2016
|
|
What is least count error?
|
|
0
|
8537
|
August 16, 2016
|
|
Give dimensions of area and volume
|
|
0
|
1052
|
August 16, 2016
|
|
Give conventional rules for the rounding off of uncertain digits
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|
0
|
2204
|
August 16, 2016
|
|
"A more precise measurement has to be more accurate." Comment
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|
0
|
2417
|
August 16, 2016
|
|
Pick up the most accurate and most precise measurement of—(a) 50.00 m, (b) 5.00 m,(c)5.00 cm, (d) 5.00 mm
|
|
0
|
3417
|
August 16, 2016
|
|
Rule out or accept the following formulae for kinetic energy on the basis of dimensional arguments:
|
|
1
|
9097
|
August 16, 2016
|
|
Whether equation is dimensionally correct, where m is mass of the body, v is its final velocity, u is its initial velocity, F is applied force and s is distance covered
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|
1
|
644
|
August 16, 2016
|
|
Find the percentage error in z, if
|
|
1
|
1771
|
August 16, 2016
|
|
Write the dimensional formula for surface energy, moment of inertia, angular velocity and gravitational force
|
|
0
|
6411
|
August 16, 2016
|
|
What is the % error in p?
|
|
1
|
454
|
August 16, 2016
|