how will you make certain that your investigation of heating and cooling of soil and water will be a fair test

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?