a cube of wooden supporting 200g mass just floats in water, when the mass is removed the cube rise by 3cm . what is the size of the cube as shown below?

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

If you put a helium-filled balloon in the refrigerator, what will happen?

The fine detail of saturn's rings provides evidence that the planet may be: a. young b. millions of years old c. in a state of growing larger