jbriggs444's latest activity
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jbriggs444 reacted to Baluncore's post in the thread Undergrad 20 Megapascals of negative pressure... What? Please explain with
Informative.
One big advantage of using ultrasound is that, the same array of transducers that images the target, can be used to strike the target... -
jbriggs444 replied to the thread High School What is space?.If a phenomenon exceeds the imagination then perhaps it is time to adopt a mathematical description and reason logically from that. This...
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Good afternoon, This is not Paul, but rather his son Robert. I am very sad to write here that my dad passed away on Saturday...
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jbriggs444 reacted to Dale's post in the thread Undergrad Why is water pressure increased in a plastic bag in a bucket? with
Like.
This sounds like the most likely hypothesis. It could be tested by comparing a bag with trapped air and a bag with all air removed. It... -
jbriggs444 reacted to ImaginaryTango's post in the thread Undergrad Why is water pressure increased in a plastic bag in a bucket? with Like.
Putting this together with the next paragraph, then it seems to me that B should work if there is some air left in the bag so the top of...
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jbriggs444 replied to the thread Undergrad Why is water pressure increased in a plastic bag in a bucket?.The idea is that with water on all sides, the clay is effectively sealed. Any air in the lump of clay cannot escape without forming a...
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jbriggs444 replied to the thread Undergrad Why is water pressure increased in a plastic bag in a bucket?.What about the possibility that capillary action is responsible? By itself, capillary action will tend to draw water into the clay...
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jbriggs444 reacted to kuruman's post in the thread Undergrad Understanding the Coriolis force with Like.
Imagine a plane rotating like a turntable about an axis perpendicular to it. A line is drawn on this plane from the axis of rotation...
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jbriggs444 reacted to A.T.'s post in the thread Why Is Fan Suction/Intake So Weak Compared to Exhaust? with Like.
There are continuous supersonic wind tunnels after all.
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jbriggs444 reacted to russ_watters's post in the thread High School Fan is pushing in the front and sucking from the back with Like.
Yeah, some people don't like the implication of negative pressure in the word; Absolute pressure can't be negative. But to engineers...
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jbriggs444 reacted to Herman Trivilino's post in the thread High School True static equilibrium and effects on time with Like.
You're still not getting it. If we are moving inertially relative to each other then either of us could validly claim to be at rest and...
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jbriggs444 replied to the thread High School True static equilibrium and effects on time.Experiment shows that an accelerating clock continues to keep accurate time. This is the "clock hypothesis". It is tested by measuring...
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jbriggs444 reacted to PeroK's post in the thread High School Does acceleration affect impact energy vs constant velocity? with
Haha.
This is a good example of the principle of conservation of thread momentum, requiring no ongoing impulse from the OP. -
jbriggs444 replied to the thread High School Traveling through space at zero km/s.And not just regardless of the speed of the source. Regardless of the speed of the observer doing the speed measurement. No matter how...