A boy pulls a box of mass 48kg with a force of 110N at an angle of 28° above the horizontal. The coefficient of friction between the sled and the surface is 0.32. Determine the work done if it's pulled 5.5m.

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 temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas