Recent content by NanaToru

I've been tutoring for chemistry and someone asked me to clarify the difference of spin angular momentum and orbital angular momentum without math. I was trying to think of a metaphor, but I wanted to make sure it's a fair one--the spin angular momentum is like Earth rotating on its own axis...

Hello all! I've been on and off this forum for a little bit now. Background: Graduated from top 50 (US News, as if that means anything) school with a degree in applied chemistry with a 3.2 gpa. I had two papers published in organic chemistry, one poster in analytical and did research abroad...

...This is honestly the most embarrassing moment of my life. Thank you though!

Is it not 0? Or is that not a valid answer?

Hm... I'm not sure it satisfies all the hypotheses--from what the back of the book says, it isn't differentiate on the interval of (-1, 1) but I'm not sure how? Did I do a bad job differentiating it?

Homework Statement Let f(x) = 1 - x2/3. Show that f(-1) = f(1) but there is no number c in (-1,1) such that f'(c) = 0. Why does this not contradict Rolle's Theorem? Homework EquationsThe Attempt at a Solution f(x) = 1 - x2/3. f(-1) = 1 - 1 = 0 f(1) = 1 - 1 = 0 f' = 2/3 x -1/3. I don't...

Thank you for your help! I understand now.

One is a rate (cells/hour), one is just a population (number of cells). It appears I didn't word my question right,. Thank you for your help so far. But if A is a population equation, and C is a change in rate of population growth, why wouldn't my answer to A have been P(t) = P0e^(kt) form? My...

Homework Statement A bacteria culture initially contanis 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 420. a. Find an expression for the number of bacteria after t hours. b. find the number of bacteria after 3 hours c. find the rate of...

haha should have expected that. I wasn't sure if it implied anything else other than a new way to find distance, but it was in relation to another question that I figured out, subsequently helping with this. thank you!

I'm really looking forward to it, especially with Rinko Kikuchi and Idris Elba in the movie. but giant monsters fighting giant robots (Or mech suits, if we are getting technical) sounds awesome.

So this might be a too simplistic question on many accounts. My pchem professor said to us that in QM, anything that can happen will. And it's a matter of probability, right? I guess I'm just curious what the scales are for something like, say, walking through a wall (the go-to example for...

Is it obvious to talk about anything by Carl Sagan? I feel like The Demon Haunted World is a great anthem for science, recommend it to anyone identifying with "scientist."

So I'm a little confused about what a standard candle tells us exactly. From what I understand, it means that the luminosity is relatively constant. Does this tell me something about apparent or absolute magnitudes? Like if a supernova has a peak brightness of an apparent magnitude of 0.7, does...

Here's my attempt at what you described, but it's got me all mixed up again. I think t2 = t1+ some tΔx Meaning that Δtobs=t2-t1 = t1 + tΔx - t1 = tΔx Δtem=tem So if I replace z=[\nuem-\nuobs)/\nuobs, we wind up with z=\nuem/\nu\Deltax and so \nu=\lambda/v? Is this the correct...