What is the wavelength of an electron moving at 5.31×10⁶m/sec?
A molecule has r.m.s speed of 550m/s at temperature of 20°c.what is its r.m.s speed at 80°c
Two radioactive nuclides, S and M, both have the same activity X at time t = 0. S and M have a half-life of 26 years and 16 years respectively. Now both samples S and M are mixed. Find out the total activity of the mixture at t = 50 years?