What is a risky behaviour

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

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?