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Hindi
12.Kinetic Theory of Gases
normal

વાયુના અણુની ઝડપો $2, 3, 4, 5, 6\, km/sec$ છે.તો $rms$ ઝડપ ............. $\mathrm{km/sec}$

A

$2.91$

B

$3.52$

C

$400$

D

$4.24$

Solution

${v_{rms}} = \sqrt {\frac{{v_1^2 + v_2^2 + v_3^2 + v_4^2 + v_5^2}}{5}} = \sqrt {\frac{{{2^2} + {3^2} + {4^2} + {5^2} + {6^2}}}{5}} $$ = \sqrt {\frac{{100}}{5}} = \sqrt {20} = 4.24$

Standard 11
Physics

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