Physics, 24.06.2019 18:40 mostman077
Apassenger bus in zurich, switzerland derived its motive power from the energy stored in a large flywheel. the wheel was brought up to speed periodically, when the bus stopped at a station, by an electric motor, which could then be attached to the electric power lines. the flywheel was a solid cylinder with a mass of 1070 kg and a diameter of 1.70 m ; its top angular speed was 2970 rev/min . 1. at this angular speed, what is the kinetic energy of the flywheel? 2. if the average power required to operate the bus is 1.89
Answers: 1
Physics, 22.06.2019 07:00, 123abc321cbaabc
What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next
Answers: 1
Physics, 22.06.2019 07:00, marlenemedina247
World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s
Answers: 2
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
Apassenger bus in zurich, switzerland derived its motive power from the energy stored in a large fly...
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