At t = 3 s, a certain particle has a speed of 10 m/s and is moving at an angle of 30∘ above the +x axis. At t = 6 s the same particle is moving at 5 m/s straight down at angle of 90∘ below the +x axis. Calculate the magnitude of its average acceleration.

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