Physics, 11.03.2020 03:25 liyahheadhigh
An astronaut is floating happily outside her spaceship, which is orbiting the earth at a distance above the earths surface equal to 1 earth radius. The astronauts weight is An astronaut is floating happily outside her spaceship, which is orbiting the earth at a distance above the earths surface equal to 1 earth radius.
The astronauts weight is:
a. one-fourth her normal weight on earth
b. equal to her normal weight on earth
c. half her normal weight on earth
d. zero
Answers: 1
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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.
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An astronaut is floating happily outside her spaceship, which is orbiting the earth at a distance ab...
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