Recent content by Herman Trivilino

If you swap ##m_1## with ##m_2## in the expressions for the final velocities those expressions will be unchanged. Note the grammatical error in the textbook. They refer to the expression for the two final velocities. It should be the plural "expressions".

Ideally, the microphone should be very close to the opening in the pipe. Blow softly (don't "overblow") in an anechoic environment. I had somewhat similar issues with an acoustic guitar. Placing the microphone inside the guitar and lightly plucking the string solved things.

Language of course differs. But I have always seen the language used in the following way: For a closed pipe the first overtone, for example, is the third harmonic.

Whether you call it the Lorentz force or the magnetic force is just a naming convention. But the fact that it's perpendicular to the magnetic field is an observed behavior of Nature, it doesn't seem like a convention to me.

Who's in charge? Skills are something that they are taught, in this case by a teacher. Allowing them to do only what they "care" to do is not a good strategy. Vernier.com is a good resource.

Because in problems like this we assume the rod is rigid. That is, it won’t bend. Due to ##\vec{D}## or any other force.

It's an equilibrium situation so all the forces are "balanced" by other forces. That's what it means to have a net force of zero. Do you have any idea where your belief comes from? Learning involves examining your own cognitive processes.

Suppose you have the following three forces, all measured in the same units: ##7 \hat{i}, -4 \hat{i}, -3 \hat{i}##. They all lie along the same line, sum to zero, and are not equal but opposite.

Even in one dimension you can have three forces adding to zero. It wouldn't make sense to say that they are equal and opposite.

True. But the problem implies that it's a coordinate acceleration of ##6g## in this particular scenario that causes the blackout. So evidently blackout occurs when an accelerometer reads ##5g##.

If you have an upward force that would create an upward acceleration of magnitude ##7g## and a downward force that would create a downward acceleration of magnitude ##g## then the net force would create an upward acceleration of magnitude ##6g##.

Ha ha. Good one. By then Dirac's formalism may be front and center. Or it could be an old dead end. Or anything in between.

The potatoes are almost all water. Cutting the amount of water in half cuts the amount of potatoes in half. What's "paradoxical" is that the potatoes would have to rot and be inedible

By convention we usually assume that as the separation distance increases beyond all bounds, the potential energy approaches zero. That's a mouthful so we just say "the potential energy is zero at infinity". Following the above convention, the potential energy of a system is the energy it takes...

There are lots of opportunities to sell your textbooks to places like this. In my experience they won't give you much if anything for one that's not the latest edition or is no longer in print. Publishers send free "desk copies" to instructors. These places exist to acquire these books.