Alarge rectangular barge floating on a lake oscillates up and down with a period of 4.5 s. find the damping constant for the barge, given that its mass is 2.30ã10^5 kg and that its amplitude of oscillation decreases by a factor of 2.0 in 4.9 minutes.

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

What do you think car designers do if the damage caused by a crash test is too severe?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.