A system consisting of a block and a horizontally-mounted spring oscillates with simple harmonic motion. The position of the block relative to its equilibrium varies according to the following equation:
x(t)= 2Sin(π/2t+ π/4)
At what time (in s) after t = 0 s is the potential energy of the system first at a maximum?
Answers: 1
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
Physics, 22.06.2019 14:30, makylahoyle
You can decrease the resistance of a length of wire by
Answers: 2
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