Question

The atmospheric pressure is 106 dyne/cm2.What is its value in SI unit?

Answer 1

Given:

Atmospheric pressure is 10⁶ dyne/cm².

To find:

Values in SI unit ?

Calculation:

• SI unit of pressure is Pascal or N/m².

• 1 N = 10⁵ dyne.

• Also , 1 cm² = 10^(-4) m².

$\therefore \: {10}^{6} \: dyne/ {cm}^{2}$

$= 10 \times \dfrac{{10}^{5} dyne}{ {10}^{ - 4} \: {m}^{2} }$

$= {10}^{1 + 4} \times \dfrac{{10}^{5} dyne}{ \: 1{m}^{2} }$

$= {10}^{5} \times \dfrac{1 \: N}{ \: 1{m}^{2} }$

$= {10}^{5} N/{m}^{2}$

$= {10}^{5} Pascal$

So, the value in SI unit is 10⁵ Pascal.