Comparison of wavelength
electromagnetic wave wavelength
a 10−4 m
b 10−6 m
c 102 m
d 100 m

which electromagnetic wave has the lowest frequency?
wave a
wave b
wave c
wave d

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms