How long does it take UV light to travel from the Sun to the Earth which are 1.497 x 10 m apart?

If element x has 99 protons how many electrons does it have

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

What describes the particles in a liquid