If you wanted to design a spring gun that would shoot a ball across the width of the room while having the ball drop only 2.54 vertically , what would the initial speed of the ball need to be? answer in meters per seconds.

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

What is the difference between electrically neutral objects and electrically charged objects

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?