help me with this give me an answer I don't know how to solve it please Calculating the speed of light in a medium: What is the speed of light in a rectangular prism if its index of refreaction is 1.5? Given: speed of light in a vacuum v = 3.00 x 108 m/s Index of refraction of ethyl alcohol n = 1.5 Required: Find the speed of light in the prism. Analysis and Solution:

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.