The mass of one atom would best be measured in this unit:
oa) amu
ob) gram
oc) milligram
od) microgram

mass of one atom is measured in the unit of 1 amu

Explanation:

As we know that the mass of one atom is very small and it is of order of

here we know that 1 amu is defined as 1/12 part of mass of 1 atom of C-12 isotope

so here we will have

so here we can say that mass of one atom is measured in the unit of 1 amu

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 .

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2