The freezing point of water is 0ác, and the boiling point is 100ác. this range of temperatures can be found naturally on the earth, which means
a. water makes up less than 30% of the earth's surface.
b. water cannot move through the roots of plants.
c. water can exist in all three states on earth.
d. water has a very low specific heat.

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

J. j. thomson’s experiment disproved the theory that an atom

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.