An electron in the c level of a mercury atom
returns to the ground state. which photon
energy could not be emitted by the atom during
this process?
(1) 0.22 ev (3) 4.86 ev
(2) 4.64 ev (4) 5.43 ev

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic