A spaceship is moving in space with a velocity of 60 kms−1. It fires its retro engines for 20 seconds and velocity is reduced to 55 kms−1. Calculate the distance travelled by a spaceship in 40 s, from the time of firing of the retro- rockets.
[2] Motion in One Dimension
Chapter: [2] Motion in One Dimension
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Suggest the best particles in the use of energy at school.
[8.1] Electricity
Chapter: [8.1] Electricity
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The Wavelength of a particular colour is 5400Å. Express it in nanometer and metre.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What do you mean by the term pitch of a screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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State two uses of vernire calipers.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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State two limitations of a metre rule.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Explain the term least count of a screw gauge. How are they determined?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Draw a neat labeled diagram of vernier calipers.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What is the purpose of a ratchet in a screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Name the two scales of a screw gauge.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What is the backlash error?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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How the backlash error is avoided?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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How will you measure the diameter of a wire using a screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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In the following figure, the pitch of the screw is 1 mm. Calculate:
(i) the least count of screw gauge and
(ii) the reading represented in the figure.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Which of the following measures a small length to a high accuracy: metre scale, vernier calipers, screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Name the measuring employed to measure the diameter of a needle.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Name the measuring employed to measure the thickness of a paper.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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Name the measuring employed to measure the diameter of a pencil.
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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What do you mean by a positive zero error of a screw gauge? How will you calculate it?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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The pitch of a screw gauge is 0.5 mm and the head scale is divided into 100 parts. What is the least count of screw gauge?
[1] Measurements and Experimentation
Chapter: [1] Measurements and Experimentation
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