15. The period of the vertical oscillations of a mass hanging from a spring is known to be constant.
(a) A student times single oscillations with a stopwatch. In 10 separate measurements, the
stopwatch readings were:
1.8 s, 1.9 s, 1.7 s. 1.9 s, 1.8 s, 1.8 s, 1.9 s. 1.7 s, 1.8 s, 1.8 s.
What is the best value obtainable from these readings for the time of one oscillation?
Explain how you arrive at your answer.
best value =
explanation
(b) Describe how, using the same stopwatch, the student can find the period of oscillation
more accurately

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.