Atomic and Nuclear Physics Answers

A long, straight wire 9.27 mm in diameter carries 147 A distributed uniformly over its cross section.Find the magnitude of the magnetic field (also called the magnetic field strength)

(a) 2.50 mm from the wire’s axis and

(b) 7.50 mm from the axis

The line integral of the magnetic field on a closed path surrounding a wire has the value 10.0μT·m. What is the current in the wire?

A single-turn square loop 20.0 cm on a side carries a 1.5 A current.

(a) What’s the loop’s magnetic dipole moment?

(b) What’s the magnitude of the torque the loop would experience if it was in a 2.3T magnetic field with the loop’s dipole moment vector at 60^◦ to the field?

A single-turn wire loop is 2.0 cm in diameter and carries a 650 mA current.Find the magnetic field strength:

(a) at the loop centre

(b) on the loop axis, 20 cm from the centre

What is the range of electromagnetic force?

What is the approximate value for the diameter of an atom?

A broken leg with a mass of 5kg receives an equivalent dose of 0.5mSv. If the X-ray energy is 50keV,how many x-ray photons were absorbed?

1. Jamie wanted to find the approximate mass of a bag of rice using a plank and metal weights. She placed the bag of rice on one of the plank`s end and an empty box on the other end. She balanced the plank by filling the box with 25 pieces of metals weights, each weighing 4.4 lbs. What is the mass in kg of the bag of rice? (ANSWER IN G.R.E.S.A.)

a.     Boron 10 has an atomic number of 5 and a nuclear mass of 10.01294 u. Calculate the binding energy per nucleon for a boron 10 atom in MeV.         

      The mass of a proton is 1.00728 u and the mass of a neutron is 1.00867 u.

b.    Boron 10 can be produced in two different ways:

(1)  By a single beta minus decay from beryllium 10

(2)  By a single beta plus decay from carbon 10.

Carbon 10 has a nuclear mass of 10.01685 u and beryllium 10 has a nuclear mass of 10.01353 u.

Explain which beta particle would have the highest velocity.  

Initially the sample contained 2.0 g of the radioactive isotope. Calculate the number of radioactive nuclei in the sample after 210 seconds.

The number of nuclei in 262 g of dubnium is 6.02 x 10²³

(decay constant: 0.02s-1)