At the Fermilab Accelerator in Weston, Illinois, Singly-Charged Ions with Momentum

question 63

Multiple Choice

At the Fermilab accelerator in Weston, Illinois, singly-charged ions with momentum 3.2 *10 ^{- 16} kg.m/s are held in a circular orbit of radius 1 km by an upward magnetic field. What B-field must be used to maintain the ions in this orbit? (q_ion = 1.6 *10 ^{- 19} C)

• A) 4 T
• B) 2 T
• C) 1 T
• D) 3 T

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Definitions:

Greater Concentration

Refers to a higher amount of a substance in a specific volume of solution or mixture when compared to another concentration.

Diffusion

The process by which molecules move from an area of higher concentration to an area of lower concentration, leading to an equal distribution.

Oil-immersion Lens

A type of microscope objective lens used with a drop of oil to increase resolution by reducing light refraction.

Coarse Focus Knob

A control on a microscope that allows the user to make large adjustments in focus, moving the objective lens closer to or further from the specimen.