A student designs an experiment to demonstrate the conservation of gravitational potential and kinetic energy. She drops a wooden block from rest through photo gate 2m below. If energy is conserved how fast should the block be traveling when it passes through the photo gate?

object 2 because all the other ones are wrong

graph question answered .. you think better when you are relaxed and happy

that the claims meet official rules.

don't misinterpret the claims

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.