All scientists try to base their conclusions on
a. expert opinions
b. data and measurements
c. evaluation of historical records
d. popular opinion

This is the substance(s) formed in a chemical reaction.

Difference between series and parallel circuits

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples