alleryAverage translational KE of a He atom at 300 K is approximately ($k_B = 1.38 \times 10^{-23}$ J/K):
A$6.2 \times 10^{-21}$ J
B$6.2 \times 10^{-23}$ J
C$300 k_B$
D$1$ J
Answer & Solution
Correct answer: A. $6.2 \times 10^{-21}$ J
$\frac{3}{2} k_B T = \frac{3}{2} \times 1.38 \times 10^{-23} \times 300 \approx 6.21 \times 10^{-21}$ J per atom.
Same for all monatomic gases at the same temperature.
Keep practising Kinetic Theory & Oscillations
Browse all Kinetic Theory & Oscillations questions for Karnataka PUC I, or explore more Physics topics.
Related questions
NEET · Physics · Oscillation Period — Gap FillNEET · Physics · Kinetic Theory — SortA diatomic ideal gas has $C_v = \tfrac{5}{2}R$. Its $C_p$ and ratio $\gamma$ are:If $x_1 = A in(\omega t)$ and $x_2 = A in(\omega t + \pi/3)$, the resultant amplitude of $Two springs of constants $k_1$ and $k_2$ connected in **series** have effective spring conA spring of force constant $k$ is cut into two equal halves. The force constant of each haThe phase difference between displacement $x$ and velocity $v$ in SHM is:A simple pendulum of period $T$ on Earth is taken to the Moon where $g_{moon} = g/6$. Its