Physics, 03.12.2019 03:31 soliseric879
The fastest time for the sears tower (now willis tower) stair climb (103 flights, or 2232 steps) is about 20 min.
a) estimate the mechanical power in watts for a top climber. assume the mass of climber is 80 kg and the heigth of the step is 0.18 m. express your answer to two significant figures and include the appropriate units.
b) if the body is 20% efficient at converting chemical energy into mechanical energy, approximately how many joules and kilocalories of chemical energy does the body expend during the stair climb? note: 1 food calorie = 1 kilocalorie = 4186 j.
Answers: 1
Physics, 22.06.2019 06:00, azaz1819
The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.
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Physics, 23.06.2019 01:30, NathanaelLopez
Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above
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The fastest time for the sears tower (now willis tower) stair climb (103 flights, or 2232 steps) is...
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