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A hot air balloon rises from the ground with a velocity of (2.0 m/s)yhat. A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (4.4 m/s)xhat relative to the balloon. When opened, the bottle is 6.2 m above the ground. (Neglect air resistance.)
(a) What is the speed of the cork, and its initial direction of motion, as seen by the same observer?
(b) Determine the maximum height above the ground attained by the cork.
(c) How long does the cork remain in the air?
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 5.9 cm behind the mirror. How is the image oriented relative to the object
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What is the energy in joules of an x-ray photon with wavelength 1.95 10-9 m, Convert the energy to electron volts
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