Lnewqban's latest activity
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Welcome to PF. Can you say in words what each one of those equations represent? What would you want to set equal to balance the forces... -
Lnewqban reacted to wrobel's post in the thread Just a kinematics problem from a Russian physics olympiad with
Like.
Perhaps someone would be interested in offering it to their students. There is a disk of radius ##R##. The disk is wound with two... -
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This is a little exercise for fun. Determine the area of the darker petals to the total area. The four circles are identical. Have fun!
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If ##g## is small but nonzero, then so is ##p=\rho g h##.
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Lnewqban reacted to Choppy's post in the thread Engineering Second degree for engineers for more job opportunities? with Like.
That's a challenging situation, and I don't think you're alone. When you put all of that time and energy into a university degree...
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Lnewqban replied to the thread High School Buoyancy and gravity.Buoyancy is about the weight of the displaced liquid respect to the weight of the boat. At half gravity intensity, both weights would be...
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Lnewqban reacted to BillTre's post in the thread Humans evolved faster after farming, wheels and metal working arose with Like.
Rates of recent human evolution have been the subject of threads here several times. Here is a AAAS news article. It is based on this...
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Lnewqban replied to the thread If Heat Is Motion, Why Isn’t All Motion Heat?.How would you define organized and disorganized types of motion? To me, your answer is correct. Thermal energy is all about the...
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Lnewqban reacted to .Scott's post in the thread Positive wing wash-in dynamic soaring one side with Like.
To be clear, you have made left turns more efficient when thermaling by making the plane asymmetric. When flying the Schweizer, I was...
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Lnewqban replied to the thread Why does a fan cool you in a sealed room if it adds heat?.Because the temperature of the skin is greater than the temperature of the air flowing over it. Note how people living in desert regions...
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Lnewqban reacted to Steve4Physics's post in the thread Why does a fan cool you in a sealed room if it adds heat? with Like.
Hi @sol_2001. For simplicity just consider cooling by convection. Suppose the air temperature is 25##^\circ## and your skin’s surface...
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It’s better, thanks. You can’t lift halfway, then start again to go higher; the car must be lowered before raising again, to allow the...
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Lnewqban replied to the thread VFD for powering a car lift.Is the lift now able to handle the 2.6 tons RR sport?