Two free point charges +q and +4q are a distance L apart. A third charge is placed so that the entire system is in equilibrium. Find the location, magnitude and sign of the third charge.

More solar radiation is absorbed by earth’s surface than by

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.

Select all the correct answers. which three statements about electromagnetic radiation are true?