An atom is neutral in charge. why??

An atom is neutral in charge because it has equal number of positively charged particle proton and negatively charged electron .Thus an atom is electrically neutral.

because the number of protons and electrons are equal

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

in physics zero. in muscle fatigue could be high