S 9. The displacement equation of a
transverse wave on a string is
y = 2.0 mm x sin((20 m-')x – (600 s-)).
The tension in the string is 15 N.
(a) What is the wave speed?
(b) Find the linear mass density of
this string

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)