According to the periodic table of elements, calcium (ca) has: a- 20 protons and 20 electrons b- 40.08 protons c-20 protons and 20.08 electrons d-20 protons and zero electrons

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

State the following: boyle's law and charle's law

The total amount of energy contained in an object