Physics, 28.06.2019 23:50 christiannpettyy
Amarathon runner completes a 42.238 km course in 2 h, 31 min, and 46 s . there is an uncertainty of 29 m in the distance run and an uncertainty of 3 s in the elapsed time. what is the percent uncertainty in the average speed?
Answers: 2
Physics, 21.06.2019 21:00
Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk,in meters?
Answers: 2
Physics, 22.06.2019 12:30
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
Amarathon runner completes a 42.238 km course in 2 h, 31 min, and 46 s . there is an uncertainty of...
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