Physics, 04.10.2019 21:30 acalvario2019
When the sun is directly overhead, the thermal energy incident upon the earth is about 1.4 x 106 ergs- cm-2-sec-1. the diameter of the sun is about 1.6x 1011cm, and the distance from the sun to the earth is about 1.3 x 1013cm. assuming the that the sun radiates like a black body, use the expression to estimate its surface temperature.
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During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
Answers: 2
When the sun is directly overhead, the thermal energy incident upon the earth is about 1.4 x 106 erg...
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