The Sun's gravity causes the planets to move in an elliptical orbit around the Sun, and a planet's gravity causes its moons to revolve around the planet. Because there is movement in both of these examples, we know that gravity is acting as a(n) . a
balanced force
b
equal force
c
unbalanced force
d
downward force

Which source would provide the most bias-free information about smoking and increased health risks? a) a website created by heart disease patients b) a research study conducted by the mayo clinic eliminate c) a public service message sponsored by tobacco companies d) an online question forum conducted by attorneys for cardiac specialists