The sodium is well-known alkali-metal and has 11 protons; the most stable isotope of sodium is 23na. it is found that the other two isotopes 24na and 22na are unstable and become stable nuclides by a radioactive decay. what type undergo to become a stable nuclides and what those would become after decay?

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the answer is b ) square root of 5

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

snell's law

refractve index = sin incidence / sin refraction