How do two isotopes of the same element different? a. they have different numbers of protons. b. they have different charges. c. they have different atomic numbers. d. they have different numbers of neutrons.

D. because Isotopes will have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.