Jack tries to place magnets on the door of his refrigerator. he observes that the magnets don’t stick. he guesses that the door of the refrigerator is made of a nonmagnetic substance. what stage of scientific investigation does his guess represent?

Constructing a Hypothesis

Explanation:

Jack already made his observation (magnet doesnt stick).  After that Jack then guesses that the fridge was made of nonmagnetic substance.  Now he must construct a hypotesis.

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

momentum of soft ball three times less than baskey ball