Find the tension in the ropes
A 49.0 kg person takes a nap in a backyard hammock. Both ropes supporting the hammock are at an angle of 21.0 above the horizontal. Find the tension in the ropes.
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Drawing on Eratosthenes' method, if two are due north and south of each other and are seperated by 400km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 23 degrees and 47 degress
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