jbriggs444's latest activity
-
jbriggs444 replied to the thread Undergrad Why is thermal energy treated differently than other kinds of energy?.Newton's third law is all about momentum. It amounts to a statement that momentum is conserved. Newton's third law has less to do with... -
jbriggs444 reacted to kuruman's post in the thread Find the acceleration of a block (some sort of double Atwood machine?) with
Like.
Did you notice that your expression cannot possibly be correct because its numerator is the negative of the denominator and simplifies... -
jbriggs444 reacted to BvU's post in the thread Find the acceleration of a block (some sort of double Atwood machine?) with Like.
:welcome: The picture is fine, but the hieroglyphs are more difficult.: is hard to decipher ... In PF you often get more questions...
-
jbriggs444 replied to the thread Find the acceleration of a block (some sort of double Atwood machine?).I had to zoom way in to read the handwriting. Your first assertion is that ##a_1 + a_2 = 2a_k##. This is obviously correct. The...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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.
-
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...
-
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...