Two skaters, one with mass 50 kg and the other with mass 60 kg, stand on an ice rink holding a pole of length 15 m and negligible mass. Starting from the ends of the pole, the skaters pull themselves along the pole until they meet. How far does the 60 kg skater move

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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.