Calculate the average atomic mass of chromium, given the following percent abundances and isotope masses: 4.350 % 49.946 amu; 83.790% 51.941 amu;
9.500% 52.941 amu and 2.360% 53.939 amu

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy