Equal SETS PLEASE TELL THIS ​

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

An object's buoyant force and weight mean the same thing.a. trueb. false