A tall building is swaying back and forth on a gusty day. The wind picks up and doubles the amplitude of the oscillation. A. By what factor does the maximum speed of the top of the building increase? B. By what factor does the maximum acceleration of the top of the building increase?
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Physics, 22.06.2019 02:30
Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.
Answers: 1
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
Physics, 23.06.2019 06:00
What would be the net charge of 1 gram gold piece after removal of 1% of its electrons
Answers: 3
A tall building is swaying back and forth on a gusty day. The wind picks up and doubles the amplitud...
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