A roller coasters velocity at the top of the hill is 15 m/s. Two seconds later it reaches the bottom of the hill with a velocity of 30 m/s. What is the acceleration of the coaster?

Please help due today

temp rises, and expansion

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!