1. At what speed will the kinetic energy of a particle of mass m = 0.001 g (gram) be equal to its internal energy?

1. At what speed will the kinetic energy of a particle of mass m = 0.001 g (gram) be equal to its internal energy?
2. What is the ratio of that kinetic energy and the kinetic energy of the same particle moving at v = 100 km/h?