The muon is an unstable particle that spontaneously decays into an electron and two neutrinos. If the number of muons at t 0 is N0, the number at time t is given by N N0et/, where is the mean lifetime, equal to 2.2 s. Suppose the muons move at a speed of 0.95c and there are 5.0 104 muons at t 0. (a) What is the observed lifetime of the muons

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

How is the ideal mechanical advantage of a wheel and axle calculated?