Engineering
Phil Freedenberg's user avatar
Phil Freedenberg's user avatar
Phil Freedenberg's user avatar
Phil Freedenberg
  • Member for 4 years, 9 months
  • Last seen more than a week ago
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What can be the reason of the constant 50 Hz sound in my home?
Apr 6, 2019
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19
Is the approximation $\cos\frac23x \approx \frac12(1 + \cos x)$, for $x$ a first-quadrant angle, well known?
9
What is the "maximum power" of an antenna?
9
Does a water-filled trench protect against freezing?
7
What to study after discrete bjt amplifiers?
6
Inductors short at DC or does it have a voltage drop?

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