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A model airplane of mass .75 kg is flying at constant speed in ahorizontal circle at one end of a 30m cord and at a height of 18m.The other end of the cord is tethered to the ground. The airplanecircles 4.4 times per minute and has its wings horizontal to thatthe air is pushing vertically upward.
(a) What is the acceleration of the plane?
(b) What is the tension in the cord?
(c) What is the total upward force (lift) on the plane's wings?
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if you know the temperature of a star how would you find its wavelength? say the temperature of a star is 30000k what
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