(5 points) Block 1 rests on top of block 2 as shown in the figure at right. A spring is attached to block 2, driving oscillations across a frictionless horizontal surface. These oscillations have a period of
T=1.5s
. Block 1, which moves with block 2 due to static friction, begins to slip when the amplitude is increased to
A=40cm
. What is the coefficient of static friction,
\mu _(s)
, between bl (5 points) The energy diagram at right is for the molecular bond in a
HCl
molecule. In a very simplified model of the oscillations in the bond, we assume that the
Cl
atom is at rest while the
H
atom oscillates because the
Cl
atom has so much more mass than the
H
atom. If the mass of a hydrogen atom is 2
m=1.67\times 10^(-27)kg
, estimate the frequency of its oscillation,
f
. Pay careful attention to the units on the graph (the bond length units are
nm
, not
m
! Potential energv (
I
) 4 3 2 1