The solid spindle AB is made of steel with an allowable shearing stress of 15ksi, and sleeve CD is made of brass with an allowable shearing stress of 9ksi. Determine (a) the largest torque T that can be applied at A if the allowable shearing stress is not to be exceeded in the sleeve CD, (b) the corresponding required value of the diameter d of the spindle AB.

less than one you can't create energy

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 components of a vector are the parts of the vectors that are to each other.

b perpendicular