Mario stands on the edge of a building’s flat roof, 10 m above the ground, and throws a 147.0-g baseball straight down. The ball hits the ground at a speed of 28 m/s. What was the initial speed of the ball?

Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates