berkeman's latest activity
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Here are a couple of other typical situations, a car and a tractor. For a typical light vehicle, normally inflated to say, 25 psi... -
The primary reason why nitrogen is used, is to prevent fire supported by compressed air, in the wheel well of an aircraft. Nitrogen also...
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berkeman replied to the thread I'm Grayman, I am stirred, but undeterred.Yeah, no reason for stress. :smile: Welcome to PF. Please keep in mind that the PF rules (see INFO at the top of the page) do not...
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Tactical screwdriver! This is no drill!
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berkeman reacted to Andrew Mason's post in the thread Does David Reich contradict Nicholas Wade? with
Informative.
There is a difference, not necessarily a total contradiction. Based on genetic analysis of European skeletons older than 5000 years... -
berkeman replied to the thread Need help with pressurized air.Welcome to PF. :smile: I don't know much about the subject, but it seems like dehumidifying the air before compressing it would be...
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'Marine' anything. "Don't get that dental floss, landlubber. Use marine dental floss. What, are you, new??" "Ah! OK. Marine dental...
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berkeman reacted to Ken Fabian's post in the thread Undergrad What causes knots and stress when untwisting ropes? with Informative.
Twisted fibre type ropes usually have three smaller twines (fibres twisted together) combined by twisting in the opposite direction -...
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berkeman reacted to Astronuc's post in the thread High School ASASSN-15lh (aka SN 2015L), a superluminal supernova, or hypernova? with
Wow.
My wife was listening to a video about superluminal supernova (Type Ic), ASASSN-15lh, or SN 2015L. It was discovered through the All Sky... -
berkeman replied to the thread Interested in quantum foundations, quantum gravity, science philosophy.Welcome to PF.
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berkeman replied to the thread An active mind....Welcome to PF, Graeme. It's good to have you here. In addition to the main PF forums, be sure to click into the "Insights Blog" link...
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berkeman replied to the thread Hello from a new member interested in theoretical physics work.Welcome to PF. Please keep in mind that the PF rules (see INFO at the top of the page) do not allow personal speculation or personal...
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berkeman reacted to Chestermiller's post in the thread Undergrad Difference calculating enthalpy change by using thermodynamic table A-17 vs. A-2 with integration with Informative.
The table in the first method used integration with respect to temperature also. It would seem to be a matter of the difference in the...
