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3 years ago

If a gas has a gage pressure or 156 kPa, it’s absolute pressure is approximately

Physics

1 answer:

Andre45 [30]3 years ago

8 0

Answer: C

Gauge pressure = 156 kPa ,

What is absolute pressure =?

We know that,

absolute pressure = gauge pressure + atmospheric pressure

Pabs = Pgauge + Patm

= 156 + 101.3 (since atm.pr. = 101.3 Kpa)

= 257.3 KPa absoulte

 approximately = 256 KPa absolue

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3 years ago

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adoni [48]

Answer:

 » Image distance :

${ \tt{ \frac{1}{v} + \frac{1}{u} = \frac{1}{f} }} \\$

v is image distance
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${ \tt{ \frac{1}{v} + \frac{1}{10} = \frac{1}{5} }} \\ \\ { \tt{ \frac{1}{v} = \frac{1}{10} }} \\ \\ { \tt{v = 10}} \\ \\ { \underline{ \underline{ \pmb{ \red{ \: image \: distance \: is \: 10 \: cm \: \: }}}}}$

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• Let's derive this formula from the lens formula:

${ \tt{ \frac{1}{v} + \frac{1}{u} = \frac{1}{f} }} \\$

» Multiply throughout by fv

${ \tt{fv( \frac{1}{v} + \frac{1}{u} ) = fv( \frac{1}{f} )}} \\ \\ { \tt{ \frac{fv}{v} + \frac{fv}{u} = \frac{fv}{f} }} \\ \\ { \tt{f + f( \frac{v}{u} ) = v}}$