If a car is traveling 75 miles per hour, how many feet will it travel in 10 seconds ?

Rohit is trying to tune an instrument

A6.0-μf air-filled capacitor is connected across a 100-v voltage source. after the source fully charges the capacitor, the capacitor is immersed in transformer oil (of dielectric constant 4.5). how much additional charge flows from the voltage source, which remained connected during the process?

What do we mean by the event horizon of a black hole?