An empty train car of mass 2.0 x 10^4 kg coasts along at 10 m/s. a 3000-kg boulder is suddenly dropped vertically into the car. find the speed of the car immediately after the boulder is dropped.

Taylor's experiment: 1. accurately measured the speed of light 2. locked together the phases of two light sources so that the interference pattern would not shift 3. showed that man's reaction time was much slower than the speed of light 4. showed that individual photons have wave characteristics

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

Which feature indicates that mars resides in the inner region of the solar system