jee-main 2018 Q12

jee-main · India · 15apr_shift2 Not Maths
The value closest to the thermal velocity of a Helium atom at room temperature (300 K) in $\mathrm { ms } ^ { - 1 }$ is: $\left[ \mathrm { k } _ { \mathrm { B } } = 1.4 \times 10 ^ { - 23 } \mathrm {~J} / \mathrm { K } ; \mathrm { m } _ { \mathrm { He } } = 7 \times 10 ^ { - 27 } \mathrm {~kg} \right]$
(1) $1.3 \times 10 ^ { 4 }$
(2) $1.3 \times 10 ^ { 5 }$
(3) $1.3 \times 10 ^ { 2 }$
(4) $1.3 \times 10 ^ { 3 }$
The value closest to the thermal velocity of a Helium atom at room temperature (300 K) in $\mathrm { ms } ^ { - 1 }$ is: $\left[ \mathrm { k } _ { \mathrm { B } } = 1.4 \times 10 ^ { - 23 } \mathrm {~J} / \mathrm { K } ; \mathrm { m } _ { \mathrm { He } } = 7 \times 10 ^ { - 27 } \mathrm {~kg} \right]$\\
(1) $1.3 \times 10 ^ { 4 }$\\
(2) $1.3 \times 10 ^ { 5 }$\\
(3) $1.3 \times 10 ^ { 2 }$\\
(4) $1.3 \times 10 ^ { 3 }$