According to coulombs law, how is the electric force related to the distance between two charges?
a. the electric force is directly related to the distance.
b. the electric force is indirectly related to the distance.
c. the electric force is directly related to the square of the distance.
d. the electric force is indirectly related to the square of the distance.

Apossible explanation for a set of facts that can be tested by further investigation is called

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects