Physics

# To find the distance d over which a signal can be seen clearly in foggy conditions, a railways engineer uses dimensions analysis and assumes that the distance depends on the mass density p of the fog, intensity(power/area) S of the light from the signal and its frequency f. The engineer finds that d is proportional to $S^{1/n}$. The value of n is?

$3$.

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Single Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 202

#### Realted Questions

Q1 Single Correct Medium
Match the physical quantities given in Column I with suitable dimensions expressed in Column II.
 Column I Column II a) Angular momentum g) ${ ML }^{ 2 }{ T }^{ -2 }$ b) Latent heat h)  ${ ML }^{ 2 }{ Q }^{ -2 }$ c) Torque i)  ${ ML }^{ 2 }{ T }^{ -1 }$ d) Capacitane j)  ${ ML }^{ 3 }{ T }^{ -1 }{ Q }^{ -2 }$ e) Inductance k)  ${ M }^{ -1 }{ L }^{ -2 }{ T }^{ 2 }{ Q }^{ 2 }$ f) Resistivity l)  ${ L }^{ 2 }{ T }^{ -2 }$
• A. a-i, b-l, c-g, d-k, e-h, f-j
• B. a-l, b-i, c-k, d-g, e-j, f-h
• C. a-i, b-l, c-h, d-j, e-g, f-k
• D. a-h, b-j, c-g, d-k, e-i, f-l

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Subjective Medium
A traditional unit of length in Japan is the ken $(1\ ken=1.97\ m)$. What are the ratios of cubic kens to cubic meters?

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Subjective Medium
Convert the following quantity as indicated:
$4.2 \,m =.............. cm$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The ratio of SI unit to CGS unit of $g$ is :
• A. $10^2$
• B. $10$
• C. $10^{-1}$
• D. $10^{-2}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 TRUE/FALSE Medium
Burette and Pipette are used to measure mass.
• A. True
• B. False

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020