PHYSICS 136 Chapter 2: Data Analysis

light of wavelength 550 nm in air is found to travel at 1.96 x 10^8 m/s in a certain liquid. Answer the following

A hydrogen molecule consists of two hydrogen atoms whose totalmassis 5.3 x 10^-26 kg and whose moment of inertiaaboutan axis perpendicular to the line joining the two atoms,midwaybetween them, is about 1.96 x10^-46kg·m². Estimate, from thesedata, the effective distancebetween the atoms.

In a room that is 2.52 m high, aspring (unstrained length = 0.30 m)hangs from the ceiling. A boardwhose length is 1.96 m is attachedtothe free end of the spring. The board hangs straight down, sothatits 1.96-m length is perpendicular tothe floor. The weight ofthe board (104 N) stretches the spring sothat the lower end of theboard just extends to, but does nottouch, the floor. What is thespring constant of the spring?