In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. in the 2010 winter olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom. (a) in the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of the track? assume that the speed at the beginning of the run is relatively small and can be ignored. /s (b) in reality, the gold-medal winner (canadian jon montgomery) reached the bottom in one heat with a speed of 40.5 m/s (about 91 mi/h). how much work was done on him and his sled (assuming a total mass of 118 kg) by nonconservative forces during this heat?

pe = weightxheight = 2000x1000=2,000,000joules

so easy. just google the electromagnetic waves and it’ll pop up.

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.

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the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.