Physics

# The ${V}_{rms}$ of certain gas at ${270 K}$ is $391{ms}^{-1}$.then the molecular weight of the gas is:

$44 gms$

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Single Correct Medium Published on 18th 08, 2020
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#### Realted Questions

Q1 Single Correct Medium
If force $F$, mass $M$ and time $T$ are chosen as fundamental quantities the dimensional formula for length is:
• A. $FMT$
• B. ${ FM }^{ -1 }{ T }^{ 2 }$
• C. ${ FL }^{ 2 }{ T }^{ -2 }$
• D. ${ F }^{ -1 }{ L }^{ -2 }{ T }^{ -2 }$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Subjective Medium

Using Dimensional analysis convert newton into dyne.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
In the expression $\displaystyle y= a\sin \left ( \omega t+\theta \right ),$ $y$ is displacement and $t$ is the time. Write the dimensions of $\displaystyle \omega.$
• A. $\displaystyle [ M^{0}LT^{0}]$
• B. $\displaystyle \left [ M^{0}L^{0}T^{0} \right ]$
• C. $\displaystyle [ M^{0}L^{0}T^{-1} ]$
• D. $\displaystyle [ M^{1}L^{0}T^{0} ]$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
Using mass $(M)$, length $(L)$, time $(T)$ and electric current $(A)$ as fundamental quantities the dimensions of permittivity will be
• A. $[MLT^{-1}A^{-1}]$
• B. $[MLT^{-2}A^{-2}]$
• C. $[M^{-1}L^{-3}T^{+4}A^{2}]$
• D. $[M^{-2}L^{-2}T^{-2}A^{2}]$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Passage Medium
The thickness of a metal sheet is measured to be $326 mm$. Express its order of magnitude in

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020