CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1 · Question Q36

What is the average kinetic energy of helium atoms at 27^\circ\text{C}?

1. (A)2.8 \times 10^{-21}\text{ J}
2. (B)2.5 \times 10^{-22}\text{ J}
3. (C)6.2 \times 10^{-21}\text{ J}
4. (D)5.6 \times 10^{-21}\text{ J}