The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are struck by photons of a wavelength of 855 nm. If a total energy of 2.87 ✕ 10−14 J is required to trip the signal, what is the minimum number of photons that must strike the receptor?

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering