Recent content by arjose

Thanks. That clears it up.

Is there a physical law that creates this limitation or is it just a matter of technicality, where lower or higher frequencies are no longer defined as having electromagnetic nature? I'm just wondering whether those extremes fall into quantum energies or with dark energies.

Is it possible for EM radiation to exist outside the EM spectrum? I'm aware of the different frequencies at which energy can be radiated eg. radio, infrared, and gamma. But is it possible for objects to absorb or release energy at subradio or supergamma frequencies? Or is there a physical law...

Is there a relationship (or equation) between a charge carrier's drift velocity through a conducting material and that material's resistance? I'm trying to reconcile the idea that drift speeds are bigger when cross sections are smaller and the idea that resistance is bigger when cross sections...

I think you should post the whole problem on #1. I'm not really sure what's happening here.

Haven't thought of it that way. Makes sense though. Any other fluid that's less dense than water should do the trick of submerging the object. Thanks for that.

Thank you for verifying that.

Homework Statement How does one experimentally measure an irregular object's volume given that said object floats on water? The Attempt at a Solution It seems to me that the simplest solution to this is to submerge the whole object by pressing down on it to the point that only the object...

Ah. Now i get it. Thanks, vela.

Those underlined got me confused again. How is the object moving at just a constant velocity if net forces cause acceleration? I'm thinking a force moved it from rest. If so, then there was acceleration, which also means a nonuniform velocity.

Hold on. I think you misread the article on BBC. The surface temperature is for the planet, not the suns. I found this on another news article: "Because both of its suns are smaller and cooler than our sun, Kepler-16b would be quite cold, with a surface temperature of around minus 100 to minus...

Didn't think stars had cold surfaces. Although I've read about those Y-class brown dwarfs. Btw, you're link is dead. Thanks for the reply though.

Given that the book is moving at constant velocity, does it matter if the force exerted by his hand is counteracted by the weight of the book? I mean is there even work to be computed if net vertical force on the book is zero?

I've also thought of signal processing as a lead towards astronomy. But without having any degree in physics or astronomy, that would just lead me to careers in engineering equipment for scientists. I was wondering if I could go both ways of being an engineer and a planetary scientist.

Homework Statement A boy supports a book on his hand while standing still. Then, he walks with the book laying motionless on his hand. Is there work exerted by the boy on the book? 2. The attempt at a solution My professor said that there is zero work done on the book because of the...