tech99's latest activity
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tech99 replied to the thread B Ultrasonic wave and regular sound wave.You can see from the reply by nasu #4 that your first formula applies at all frequencies. -
tech99 replied to the thread B Simple mass/scale puzzle.Or the supposed impossibility of moving an object because every applied force has an equal and opposing reaction.
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tech99 replied to the thread B Simple mass/scale puzzle.Aftyer all that, as we measure weight in Newtons, the question is meaningless.
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tech99 replied to the thread B Ultrasonic wave and regular sound wave.I think gamma here is the ratio of the adiabatic to isothermal values for specific heat capacity. I will try to find out if there is a...
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tech99 replied to the thread How Does Flickering Light Influence Our Brain's Perception of Image Brightness?.The USA adopted 60 fields per second, 30 frames, and UK and Europe adopted 50 fields per second, 25 frames. These were initially locked...
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tech99 replied to the thread Capacitor charging: Where do extra electrons come from?.When the switch is operated, a pulse of opposite polarity is sent at the speed of light along each wire to the capacitor. The pulses...