3. How can you make the work output of a machine greater than the work input? (1 point)
by decreasing friction
by increasing the input force hos
by increasing the output distance
none of the above

d) the number of neutrons plus the number of protons

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

15.3 cos 65 degrees trig

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge