Question

Po²¹² undergoes alpha decay. Alpha particle have K.E of 8.776MeV. Assume the mass of Alpha particle to be 6.67*10^(-27). Calculate their velocity

Answer 1

KE = $\frac12mv^2$

$8.776\times10^6\times1.6\times10^{-19}=\frac12\times6.67\times10^{-27}\times v^2$

$4.2\times10^{14}=v^2\\v=2.05\times10^7m/s$