Which statement about passive solar heating systems is true? a they do not work in enclosed areas b they generate electricity c their heat cannot be stored d they do not produce electricity

D. They do not produce electricity.

Passive solar heating is a technique where the sun's energy is used for heating spaces. It does not generate electricity but can save substantial electricity by making use of thermal mass. Materials that have a high density such as concrete and bricks absorb and store electricity. Along with operable windows and thermal chimneys,  thermal mass is being utilized to take advantage of sun exposure.

because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. so, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.