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An electron is on a -2.5 eV energy level. The electron is struck by a 2.5 eV photon. What will most likely happen? Is the Hubble constant square relative to the Einstein cosmological constant? 6 safety devices and their uses? Hi can someone answer these log and exponents questions? What is the surface area of a box with a base of 17 1/2 inches and length of 34 inches if it is scaled up by a factor of 10?