Which of the following could represent the test variable in the experiment “the effects of cheap gasoline on fuel injectors”?

a. fuel injectors

b. gasoline

c. new cars

d. car engines

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.