Saturday

April 19, 2014

April 19, 2014

Total # Posts: 15

**Physics**

Wow, Thanks, that helped a lot!

**Physics**

Why do electrons in hydrogen atoms emit infrared light when they make transitions to the n=3 energy level and uv light when they make transitions to the n=1 level? Does this have to do with wavelengths?

**Physics 30**

How would I figure out the horiz. distance if I have the velocity and the vertical distance? I also have the acceleration. What formula could I use?

**Physics 30**

Would the answer to this question be total energy and momentum for both one dimensional and two dimensional collisions: State the quantities conserved in one dimensional and two dimensional collisions.

**Religion**

MMMmmm...Kinda. It's the place you go to before Heaven and that is where your are cleansed or purged from the sins that you committed during your lifetime. That is why the priests come to say the last rites, to confess your sin so you won't have to spend as much time i...

**Essay Writing**

Does anyone know a good website where you learn how to write excellent essays. I usually do alright but I want to get better.

**Physics 30**

I have to do a poster on a van de graaff generator but I am having trouble understanding the concept of it. Here's how I understand it: The lower roller turns the belt and creates a negative charge while the belt creates a positive charge but after that is where I get conf...

**Physics 30**

State the quantities that are conserved in one-d and two-d collisions. Give an example of each type of collision. I looked in my textbook and all i could come up with was that momentum was conserved for both?

**Physics 30**

How do you figure out if a collision is elastics or inelastic, when it is dropped and then bounces? Do you figure out the velocity and then put that in the Ek formula?

**Math 30 Pure**

9x^2+16y^2+64y+28=0 I am supposed to convert this to standard form, but my answer doesn't make sense. One part was 9x^2/92...does that sound right?

**Math 30 Pure**

I am supposed to descibe the relation, would i just say a horiz. trans. 1 left and 2 units down?

**Math 30 Pure**

(y+2)^2=-(x+1) I want to know if (x+1)=-(y+2)^2 is the same thing, and if it is, then is the stretch factor -1?

**12th grade Math-statistics**

The annual sales, in millions, for 28 toy department stores is listed. A)Calculate the mean and standard deviation of the data. Answer to the nearest tenth. B) Calculate the percent of sales to the nearest whole number, that are: i)within one SD of the mean ii)within two SD of...

**Math-statistics**

For a i used my calc. The 1-Var Stats

**Math-statistics**

The annual sales, in millions of dollars, for 28 toy department stores is listed. 38 35 43 27 24 40 38 21 34 27 35 36 24 33 27 33 44 45 23 33 33 24 33 27 32 35 29 31 A)Calculate the mean,(u), and standard deviationof the data. Answer to the nearest tenth. (My answer): U=32.3 S...

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