Tarnishing of iron is similar to which of the following changes? O Folding a paper
O Shredding a paper
Burning a paper
Dropping a paper

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

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