Americium-241 undergoes radioactive decay to produce neptunium-237. Which particle needs to be added to this equation to show that the total
numbers of neutrons and protons are not changed by the reaction?
391 Am - 33Np+?
A. 0-1e
B.4/2He
C. 0+1e
D.2/4He

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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