Herman Trivilino's latest activity
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For things moving free or at rest, Observe what the first law does best. It defines a key frame, Inertial by name, Where the second law... -
In the 1905 paper, Einstein says "Let us take a system of co-ordinates in which the equations of Newtonian mechanics hold good." This...
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Herman Trivilino replied to the thread B Newton's first law?.In newtonian physics, the 1st Law describes bodies that are not accelerating. There is no net external force acting on it. There...
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Herman Trivilino reacted to Baluncore's post in the thread I Time interval terminology with
Informative.
The astronomical term is "Synodic Day", because that Earth rotation is measured relative to the Sun, not (sidereal) the stars. The term... -
Herman Trivilino replied to the thread A Charge to mass ratio of a photon.Charge to mass ratio applies only to particles that have both charge and mass. It makes no sense to speak of the charge to mass ratio of...
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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...
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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.
