Recent content by Avathacis

Bump, I still need help :(.

Homework Statement An electromagnetic wave, which has the frequency of f = 5MHz, goes from an unpermeable location, which has a permittivity of e = 2, to vacuum. Calculate the change in length of the wave. NOTE: I haven't found greek letters in the post menu, so if they're somewhere in there...

So as you might or might not know the Pale Blue Dot is a picture taken from the spacecraft Voyager 1 when it was 6.1 billion kilometers away from Earth. To quote Carl Sagan: (of course there is a lot more quotable and more important material, but it serves for the question) "Because of the...

Thanks! Done!

Homework Statement A ball is rolling off an inclined plane. After 1 second the ball has traveled 10cm. How far will it travel in 3 seconds?Homework Equations v = l/t v = v0t + at x = x0 + v0t + at2/2 The Attempt at a Solution v = l/t1 v = v0t + at (there's no starting velocity, so) l/t1 =...

Hey, any math i can get is of great use to me. Especially if it's something that hasn't been taught to me in school. Somehow things "outside" school seem more interesting to me. Also the above is correct. It's just +x, not -x. It's also way faster.

I arrived there because of this: dA = 64 - 14vTt = 8 Because it at least looks the same as dT - dA. But never mind that. Anyway, food wins. I just finished eating and i managed to solve it while bringing the plate downstairs. vTt = dT 14dT = 64 - 8 dT = 4 dA = 64 + 4 -8 = 60. The answer...

I'm not sure if i completely understand this. As i understand that the distance between them is (at some point in time): dT - dA = (64 + vTt) - (15vTt) = 64 - 14vTt = 8 but if dT - dA = 64 - 14vTt then dA = dT - dA? (Which is clearly impossible, unless the tortoise ran 0 meters, which is...

I'm sorry for all that confusion. The problem was a translation from Lithuanian to English (but the translation is nearly word to word. I was confused too.). It has been reduced by a factor of 8, but that doesn't equal to 8 (or I'm wrong) since we have to take the distance turtle ran into...

Yeah, sure. Let's assume there's a guy and his girlfriend. The guy notices his girlfriend who is 160 meters away from the guy. When the guy decreases the distance between them by 8 times (meaning his girlfriend is now 20 (160/8=20) meters away from him) the girlfriend notices him. If it's...

I'm probably misunderstanding you, but this isn't Zeno's Paradox. Achilles probably won't even reach 64 meters before he stops the race.

Homework Statement When Achiles decided to race with the tortoise, it had already walked 64 meters. After Achiles lowered the distance between him and the tortoise 8 times, he realized that he was 15 times faster than his opponent. Achiles stopped the race. How far did Achiles run before he...

bump, still haven't figured this out.

Err, i was assuming i could put it in equilibrium, but since the density is 0.9 g/cm^3 it can't be in equilibrium, right? This can't be that hard to solve. Borek, can you write equations on what you based your assumptions and your answer? :3

Is it stated that the Y axis has an upward direction? Otherwise just choose it to be downward and you've solved the problem.