Herman Trivilino's latest activity
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Herman Trivilino replied to the thread I Time interval terminology.The time to make one rotation is about 23 hours, 56 minutes. The so-called sidereal day. 24 hours is a solar day. I don't know of a... -
Herman Trivilino reacted to jbriggs444's post in the thread Reconcile poundforce w/slug and lbmass with
Like.
The standard way to calibrate a spring scale (including scales that use load cells) involves standard reference masses. e.g. You put a... -
Herman Trivilino replied to the thread Reconcile poundforce w/slug and lbmass.Any reputable company would calibrate the scale so that it reads one pound. They would not agree with you that the 32.2 is fixed...
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Herman Trivilino replied to the thread Reconcile poundforce w/slug and lbmass.Which is illegal if you're using the scale for commerce. Buyers would benefit, but sellers would lose money. An unsatisfactory...
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Herman Trivilino replied to the thread Reconcile poundforce w/slug and lbmass.What if you're near the equator where the free fall acceleration is less than 32.1 ft/s2? If you set an object with a mass of one pound...
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Herman Trivilino reacted to haruspex's post in the thread Help on reflection of a wave from fixed end without transmission with Like.
Yes it is. The given wave is y=2 sin(4x-8t). The quoted procedure is "the reflection of the wave y=A sin(wt-Kx) is y=-Asin(wt+Kx) … is...
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.Yes. At the time it I considered it a distraction from my point about changing the sign of ##y## being a fundamental error. Agreed...
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.No. I was thinking that the value of ##y## need not be zero at the point where the string reflects, but I now see that's nonsense. What...
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.Okay, I made a mistake thinking that. But if ##y = 2 \sin(4x-8t)## is a wave on a string traveling to the right and it reflects off a...
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Herman Trivilino replied to the thread Vertical Circular motion- A confusing question.As long as you understand that "top" in the case of a string may not be as high as "top" in the case of the rod.
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Herman Trivilino reacted to Greg Bernhardt's post in the thread Announcement Please welcome berkeman as PF Admin with Like.
I am thrilled and honored to announce that @berkeman has accepted a role as PF Admin! @berkeman has 20 impactful years at PF under his...
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Herman Trivilino replied to the thread I Why isn’t there an equation to describe how energy is redistributed by destructive interference of an electromagnetic wave?.Please don't draw that conclusion from the comment you replied to. So-called closed form solutions (that give exact results) are indeed...
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.There is no statement of the problem. How could there be a specification of anything?
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.You are assuming that the original problem asks for the equation of the wave. But I was assuming it was asking for the equation of the...
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Herman Trivilino replied to the thread Help on reflection of a wave from fixed end without transmission.He never showed us the statement of the problem he was asked to solve.