Which among the following represents a set of isotopes? Atomic nuclei containing: a) 20 protons and 20 neutrons

b) 21 protons and 19 neutrons

c) 22 neutrons and 18 protons

d) 20 protons and 22 neutrons

e) 21 protons and 20 neutrons

d. 20 protons and 22 neutrons

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.