Recent content by Alain12345

I'm working on a chemistry assignment that involves creating redox tables. The explanation in the textbook isn't a very good one and I can't find my answer through google either :mad: Here's the problem: The following equations represent spontaneous reactions. From this evidence, set up a...

I need help with a projectile motion problem I'm working on. I completed the problem, but I'm not sure if I got it right and there's no one that I can confirm my answer with... except you guys :smile: A ball is thrown at an angle of 37.1* above the horizontal from a point on the top of a...

A boat leaves dock at 2:00 PM, heading west at 15 km/h. Another boat heads south at 12 km/h and reaches the same dock at 3:00 PM. When were the boats closest to each other? I've solved other problems similar to this one, but I can't seem to figure this one out. I'm not sure what I have to do...

I have a problem that I need help with. I tried to solve it, but I don't know how. I don't have much trouble solving simpler min and max problems, but when they start throwing in more numbers, I get confused. The landlord of a 40-unit apartment building is planning to increase the rent...

I need help with a question asking if the particle is speeding up or slowing down. A particle moves on a vericle line. It's position, s, in metres at t seconds is given by s(t)= t^3-9t^2+24t a) determine the velocity and acceleration functions I got v(t)= 3t^2-18t+24 and a(t)= 6t-18 b)...

I need help finding limits. I know it's pretty simple most of the time... I know that for example if the lim x--> 3 of x-3, you just plug 3 for x... what do I do if it's the absolute value of x-3? I know you guys like to see that I've tried to solve the problem, but there's not much I can...

Today was the second day of school, and my calc teacher gave some review homework. We did problems similar to the ones last year, but I don't remember how to do them. I'm sure it's pretty simple, but I need help anyways :rolleyes: It says: Expand and simplify. Express each equation in...

If I am given (y-2)2= 4 (x-3), how would I find the vertex, equation of the axis of symmetry, and the direction of the opening? I'm guessing that I have to use PF=PD, but it's confusing because it looks different from other things that I have done involving PF=PD. Thanks.

So 30 degrees is okay for my final answer? Thanks a lot! :smile:

I'm sorry, I put the 62 in the wrong place when I was makign the diagram. It should be between the normal and the ray

I completed a question about TIR in a glass prism, and I was wondering if someone can tell me if I got it right. Thanks "Less" and "more" refer to the less dense medium and more dense medium, and the red line is the normal. http://img145.imageshack.us/img145/7061/tirquestion0mi.png...

okay, thanks a lot guys. So it's real, inverted, and M>1

I have to complete a problem about locating an image for a convex lens but I'm having trouble with it. I tried it out, but I can't complete it. Can someone help please? Locate the image for the convex lens below. Use any two rays to do so. Give the characteristics of the image. I'm having...

lol oops... I typed it out wrong, but I still don't know how to use it :cry:

oh okay then I'll just type it here do di f 60 cm ? 20 cm 30 cm ? 15 cm 105 cm ? 70 cm 40 cm ? 20 cm 45 cm ? 15 cm 210 cm ? 70 cm 15 cm ? 20 cm