Suppose you have 4 stars with given initial conditions (positions and momenta). the net force on each star is the vector sum of 3 forces exerted by the other 3 stars, for a total of 12 forces that must be evaluated in each iterative step. in each step, how many forces would you have to calculate fully, and how many forces could you calculate simply by reversing vectors already calculated?

7.study the scenario. a small container of water with a low temperature is poured into a large container of water with a higher temperature. which choice correctly explains what happens to the thermal energy of these systems? the smaller container of water has more heat and thermal energy than the larger container. some heat and thermal energy is transferred to the larger container of water. the larger container of water has more heat and thermal energy than the smaller container. some heat and thermal energy is transferred to the smaller container of water. the larger container of water has more thermal energy and some of that energy is transferred to the colder water in a process known as heating. the smaller container of water has more thermal energy than the larger container, and some of that energy is transferred to the warmer water in a process known as heating.