Lnewqban's latest activity

@NTesla, the last part of the question on the screenshot is missing. So here’s what (I believe) it should say: "... At a certain...

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...

https://www.cidrap.umn.edu/covid-19/new-coronavirus-subspecies-sars-cov-2-mutation-discovered-brazilian-bat Gizmodo published an...

The weights and balances/mass properties part of this that @DaveC426913 suggested are really the best answer. The actual most efficient...

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...

Without the interference of the elevator, that person would be freely falling. That interference can be minimum if the cables break, or...

Thank you very much for all the explanations Lnewqban, Gavran, haruspex, Steve4Physics

Both, the stationary bat and the moving moth, receive sound of the same frequency. That common frequency is greater than the frequency...

Please, see:

Thank you very much for all the help and explanation kuruman, jbriggs444, Lnewqban, Herman Trivilino, Gavran, haruspex

When te straw is lifted, water level inside the straw will decrease causing the volume occupied by the air increases ans reducing the...

Welcome @dacad Please, see: https://www.engineeringtoolbox.com/convective-heat-transfer-d_430.html

The pulling force of each person and the tension force along the whole nylon string must be the same for each instant. In this specific...

Sorry, I am unable to understand your sketch above. Could you show us a more realistic diagram, please?

There is also a lovely theorem by Ptolemy that deals with cyclic quadrilaterals. I think that will work......not an intuitive result...