A110 g sample of copper (ccopper = 0.385 j/g * degrees celsius) is heated to 82.4 degrees celsius and then placed in an insulated container of water (cwater = 4.18 j/g * degrees celsius) at 22.3 degrees celsius. the final temperature of the water and copper is 24.9 degrees celsius. what is the volume of water? (dwater = 1 g/ml).

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?