Physics, 27.11.2019 05:31 braphi5609
Aguy wire is used to support flagpoles in windy areas. these wires are anchored in the ground to provide constant stability. you need to replace the guy wire on a pole that is 20 feet tall.. the anchor point for this flagpole is 15 feet away from the base of the pole. a. how long is the wire you need to purchase to replace the old wire? b. you are also a friend determine the length of a guy wire for a 10-foot flagpole. the wire needs to be anchored 6 feet from the base of the pole. you can purchase guy wires in whole foot lengths only. using your knowledge of perfect squares, estimate the length of wire you would need to complete the project. how much wire would be left over?
Answers: 3
Physics, 21.06.2019 23:00, xojade
Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)
Answers: 3
Physics, 22.06.2019 12:30, lmolder1329
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
Physics, 22.06.2019 17:50, manou76
Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?
Answers: 1
Aguy wire is used to support flagpoles in windy areas. these wires are anchored in the ground to pro...
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