You are out in the woods and you need to move a boulder that is in the way, you happen to have a long 2-by-4 board with you and you decide to use it as a lever. you find a rock to act as a fulcrum. which of the following would be a good thing to try?
a. move the fulcrum rock closer to the boulder.
b. move the fulcrum rock farther from the boulder.
c. try using the board without a fulcrum.
d. try shortening your board.

A) Move the fulcrum rock closer to the boulder

Explanation:

The longer the effort arm is and the shorter the load arm is, the less energy it takes to move the end of the load arm.

X <-load effort-> X Effort Energy: 10

O <- fulcrum

X <-load effort-> X Effort Energy: 100

O <- fulcrum

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

not sure if this is what you'r looking for nnew= nold