Two identical 1.50kg masses are pressed against opposite ends of a spring of force constant 1.75N/cm, compressing the spring by 25.0cm from its normal length. Find the maximum speed of each mass when it has moved free of the spring on a smooth, horizontal lab table.

it is called kinetic energy

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

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.