What is the scientific mane for the layer of gas that surrounds the earth

Which of the following would not be taken into consideration when describing the quality of a sound

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.