Question

Two spheres of different material have the same radii. The ratio of their momenta is 2 : 1 an
the ratio of their kinetic energies is 1:2. Then the ratio of their densities is
1) 1:8
2)8:1
3) 1:4
4) 4:1​

Answer 1

2:1/1:2=2/1*2/1=4/1=4:1