When the electron from the n=4 excited state drops to the ground state, does it absorb energy or emit energy?

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?