True or false the Red blood cells and the Lungs are similar in that they both deal with Oxygen and Carbon Monoxide.

Anybody wanna ? (picture included? )

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.