berkeman's latest activity
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berkeman replied to the thread Collection of Lame Jokes. -
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berkeman reacted to erobz's post in the thread Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile with
Like.
@berkeman I'm in the grey shirt. This is Mt. Creek Bike Park in New Jersey. This is me coming off of a pretty nice sized drop... -
berkeman reacted to boneh3ad's post in the thread Graduate Linearization of the Navier–Stokes equations for real airflow conditions with
Informative.
Do you understand the concept of linearization? The fundamental idea relies on assuming certain terms are small enough that nonlinear... -
berkeman reacted to Baluncore's post in the thread Controlled (Thyristor) Three-Phase Full-Wave Rectifiers in LTspice with Like.
I have not got it running yet. Your gate bias was a problem. See attached.
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berkeman reacted to tech99's comment on media item The Genius Device That Rocked Formula-1 Racing with Informative.
The device can add inertia to the suspension travel without adding very much actual mass. If the suspension is thought of in an...
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berkeman reacted to Baluncore's post in the thread What should sit beside a physics equation? with Informative.
Take a look at a book of physics formulas. https://www.amazon.com.au/dp/B0BDXFMG5M/
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berkeman reacted to erobz's post in the thread Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile with Like.
I don't have youtube for videos, but maybe I can get some still frames. :smile:
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That article now contains a more realistic acceleration (around speed of sound after a minute) and the following at the end:
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berkeman replied to the thread Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile.I think some videos of your riding group are needed here... :smile:
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It is understandable why one would want to determine the radiation dose level. The Problem is that it is not simple to do so...
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berkeman reacted to A.T.'s post in the thread Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile with
Agree.
Thanks! However, from the videos posted by @berkeman I'm getting the impression that it's usually not a passive ride over the edge. The... -
berkeman reacted to DavidL070949's post in the thread Help with problem in MIT open course general relativity with Like.
All of this is very helpful indeed! I'm going to try to work through the details on my own, so that I make sure I really understand and...
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berkeman replied to the thread Undergrad DH Mt Bike - Optimizing Drop Landing Ramp Profile.
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berkeman reacted to mfb's post in the thread Voyager 1: order-of-magnitude cross-track drift and speed loss over the next 100–1000 years with Informative.
With your assumptions, the acceleration due to gas (or gas+dust, a 1% effect isn't important here) is ##\frac{v^2\rho A}{m} = 7\cdot...
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I am from Computer Science background, but i am also very interested in learning more about Mathematics, Philosophy and Physics. Hope to...
