The diameter of the observable universe is about 93 billion light-years, but what is the size of the whole universe? (astronomy)

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

How do the kidneys affect homeostasis