Solenoid Problem

A Solenoid has 704 turns, a length of 33.3 cm, a radius of 3.85 cm. If it carries 5.61 A, calculate the magnetic field at an axial point located 20.2 cm from the center. Answer in units of T.

Ultrasoound waves/ Degassed water

When doing ultrasound work and the sound waves must pass through water, it is important to used gegassed (outgassed) water. This can be done by one of several methods. One is to make the pressure above the water sample as low as possible, i.e., a partial vacuum. The other is to boil the water at normal pressures. Discuss the physics behind these degassing techniques.

Desktop-sized proton accelerator

Your company is designing a desk-top sized proton accelerator, using a 500MN/C superconducting magnet to hold the protons in a circular path. Estimate the maximum kinetic energy that your accelerator can give protons. Express your answer in the conventional particle physics unit of electron-volts, where 1 eV=1.6*10^-19J. For comparison, the accelerator at the Fermi National Laboratory can accelerate protons to energies greater than 1 TeV. (Hint: Assume that the protons are nonrelativistic, do the calculation, and then check that assumption.)

velocity selector

velocity selector

Mass Spectrometer

A mass spectrometer is a device that uses a magnetic field to sort atoms by mass. In this device, atoms whose masses are to be determined are ionized by stripping off one electron. They are then sent through a velocity selector that selects ions only with specific speed V, and these ions are sent into a region of space filled with a known uniform magnetic field B(vector) perpendicular to V(vector). The field causes each atom to follow a circular path whose radius is proportional to the atom's mass. Atoms with different masses will therefore follow somewhat different circular paths and thus end up at different places on a photographic plate, as shown in figure E7.17(included as attachment... click for more