According to the thin lens formula (1/f=1/s1+1/s2), the linearized relation between s1 and s2 is equal to -1. Derive this yourself.

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

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.

Where should a carbon monoxide detector be mounted?