Lnewqban's latest activity
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Lnewqban reacted to anuttarasammyak's post in the thread Undergrad Conservation of angular momentum in the iceskater example with
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The angular momentum before and after the change in the moment of inertia is conserved: $$M=I_1\omega_1=I_2\omega_2$$ Assuming ##I_1 >... -
Lnewqban replied to the thread Undergrad Conservation of angular momentum in the iceskater example.That inwards movement of the limbs reduces the total angular inertia of the ice-skater (the centers of masses of the arms acquire less...
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Lnewqban reacted to timeuser84's post in the thread Undergrad Question about the absorption of heat based on color with Like.
This was more than enough knowledge, thank you for the quick responses.
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Lnewqban reacted to Baluncore's post in the thread Undergrad Question about the absorption of heat based on color with Like.
Three different parts of the spectrum need to be considered. 1. Ultraviolet, UV. 2. Visible light colour. 3. Infrared, heat, IR. The...
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Lnewqban replied to the thread Belt C-C distance to Tension.Welcome! What makes you believe that a relation exists between those two parameters? The C-C distance is determined by the internal...
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Lnewqban reacted to Steve4Physics's post in the thread Chain falling out of a horizontal tube onto a table with Like.
@NTesla, the last part of the question on the screenshot is missing. So here’s what (I believe) it should say: "... At a certain...
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Lnewqban replied to the thread Cone Rolling on Conical Surface Dynamics.Welcome! I would consider cone A as a wheel of mass m rolling over cone B keeping radius l and rotating at constant angular velocity...
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https://www.cidrap.umn.edu/covid-19/new-coronavirus-subspecies-sars-cov-2-mutation-discovered-brazilian-bat Gizmodo published an...
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Lnewqban reacted to boneh3ad's post in the thread Aero/Hydro-dynamic Streamlining as a function of medium with Like.
The weights and balances/mass properties part of this that @DaveC426913 suggested are really the best answer. The actual most efficient...
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Lnewqban reacted to Baluncore's post in the thread Aero/Hydro-dynamic Streamlining as a function of medium with Like.
I disagree. Aircraft have a sharp edge convergence at the rear to reduce wake and drag. They also have a blunt or spherical nose, where...
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Lnewqban replied to the thread Graduate Please Explain Elementary Physics Elevator Question.Without the interference of the elevator, that person would be freely falling. That interference can be minimum if the cables break, or...
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Thank you very much for all the explanations Lnewqban, Gavran, haruspex, Steve4Physics
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Lnewqban replied to the thread Speed of moth related to Doppler Effect.Both, the stationary bat and the moving moth, receive sound of the same frequency. That common frequency is greater than the frequency...
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Lnewqban replied to the thread Undergrad Ramjet effect on drone.Please, see:
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Lnewqban reacted to songoku's post in the thread Correct statement about a reservoir with an outlet pipe with Like.
Thank you very much for all the help and explanation kuruman, jbriggs444, Lnewqban, Herman Trivilino, Gavran, haruspex