The refracting telescope at the yerkes observatory has a 1.00-m diameter objective lens of focal length 20.0 m. assume it is used with an eyepiece of focal length 1.90 cm. (a) determine the magnification of mars as seen through this telescope.

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Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

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