A beam of accelerated protons from the Large Hadron Collider can be used to "spray paint" an insulator with protons. Calculate the number of protons needed to paint the cover of your textbook with a charge density of 3 x 10-6 C/m2. [If you use an online textbook, substitute the textbook by the area of your computer screen.]

Question

A beam of accelerated protons from the Large Hadron Collider can be used to "spray paint" an insulator with protons. Calculate the number of protons needed to paint the cover of your textbook with a charge density of 3 x 10-6 C/m2. [If you use an online textbook,  substitute the textbook by the area of your computer screen.]

jamesj · Answer

What's the charge of a proton? And hence how many protons do you need per square meter?