Physics, 15.04.2020 00:50 CoolDudeTrist
The intensity of electromagnetic waves from the sun is 1.4kW/m2 just above the earth's atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you think of your back as a 26.0 cm × 52.0 cm rectangle. How many joules of solar energy fall on your back as you work on your tan for 0.90 h?
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If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?
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Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)
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The intensity of electromagnetic waves from the sun is 1.4kW/m2 just above the earth's atmosphere. E...
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