jbriggs444's latest activity
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jbriggs444 replied to the thread Undergrad What is the pressure of trapped air inside this tube?.Yes, I agree with that. Prior to correcting it, I had written about points 1 and 2. I meant to refer to points 1 and 3. In both... -
jbriggs444 replied to the thread Undergrad What is the pressure of trapped air inside this tube?.Agreed. Agreed. What increases compared to what? What specific point are you claiming does not change in pressure compared to the... -
jbriggs444 reacted to 256bits's post in the thread Undergrad What is the pressure of trapped air inside this tube? with
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To which orientation of the u-shaped tube are you referring? as having the higher system pressure. You have the pressure at point... -
jbriggs444 replied to the thread Undergrad What is the pressure of trapped air inside this tube?.*sigh*. Now I will need to watch the video to see what it is actually claiming... Having watched the beginning of the video, I see that... -
jbriggs444 replied to the thread Undergrad What is the pressure of trapped air inside this tube?.Right The second part here is correct. That means that the fluid pressure at the air-water interface is sure to be one atmosphere. The... -
jbriggs444 replied to the thread Undergrad What is the pressure of trapped air inside this tube?.Yes. Have you considered applying Boyle's law? -
jbriggs444 replied to the thread Correct statement about size of wire to produce larger extension.Why should it? Are there any specific confounding concerns that you have in mind? -
jbriggs444 reacted to Steve4Physics's post in the thread Correct statement about size of wire to produce larger extension with
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Here's one way to look at it... For a given material, there is a unique maximum value of strain, ##\epsilon_{max}##, at which fracture... -
jbriggs444 reacted to haruspex's post in the thread Correct statement about size of wire to produce larger extension with
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The given answer does not require exact linearity. -
jbriggs444 replied to the thread High School A Mind-Boggling Number Comparison.Given a set of all sets, one can define the set of all sets not containing themselves. Then you ask yourself, does this set contain... -
jbriggs444 reacted to Herman Trivilino's post in the thread High School Limiting case for an Atwood's machine with
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Only in the limiting case where ##m_1## is zero. In other words, you have an ideal pulley and you hang two objects such that the mass... -
jbriggs444 reacted to brotherbobby's post in the thread High School Limiting case for an Atwood's machine with
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If you put the value of the tension ##2T = \dfrac{4m_1m_2}{m_1+m_2}g## and subtract it from the force due to gravity ##(m_1+m_2)g##, it... -
jbriggs444 replied to the thread High School Limiting case for an Atwood's machine.Right. That external agent is, of course, the tension in the rope. Right. The center of mass of the two masses is accelerating... -
jbriggs444 replied to the thread High School Limiting case for an Atwood's machine.Accelerating upward at 1g is different from freely falling downward at 1g. One requires an external force. The other does not.
