ddaniellebenson ddaniellebenson 17-01-2023 Physics contestada 11. A helium atom (mass = 4m) moving with speed v collides elastically with a deuterium (hydrogen 2) atom (mass = 2m) at rest. Calculate the percentage change in the kinetic energy of the helium atom after the collision. a. 11% b. 36% c. 50% d. 89%