Science & Mathematics - 26 November 2007

i'm doin a project on Radioactive pollution. Cherynobyl is an accident.So wanted to know if atom bomb disasters can also be considered for it like nuclear bombs.

2007-11-26 06:17:43 · 6 answers · asked by Golden 2 in Physics

2007-11-26 06:16:22 · 1 answers · asked by Lexcollect 1 in Mathematics

Ok i have been doing this problem for the last 30mins, and i keep having problems. its probrably just me! :)

Ok here it is!

The Question is Find f ' (x) and Simplify

f(x) = 2cos(3x^5)

2007-11-26 06:13:40 · 4 answers · asked by Anonymous in Mathematics

i cant solve this question and its been bugging me
please help!

solve 3^(x+2) = 3^x + 216 for x.

3 to the power of (x+2) = 3 to the power of x plus 216.

2007-11-26 06:12:47 · 2 answers · asked by PeterW 1 in Mathematics

can you please tel me if this is the rite way to smoke a weed plant>>>1 take off the buds of the weed plant. then stick them together. then hang upside down in dark cool place for about 10 days so it can dry. then you crumble it to small pieces to smoke. is this the rite procedure or is there anything else i got to do?

2007-11-26 06:11:23 · 3 answers · asked by jayrayroller 1 in Botany

What element is this?
I am lack luster.
I am bone idle and lazy.
I am used in arc welding because i wont combine with oxygen and explode.
I am also sometimes found in lightbulbs.

2007-11-26 06:09:44 · 7 answers · asked by Nikki 1 in Chemistry

Solve The System by the method of substitution

1. {-5x - y = 7, 2x - 3y = 4}

a. (1, 2)
b. (-1,-2)
c. (-2,-1)
d. (2,1)

2. {5x - y = 10, 4x - y = 7}

a. (3,5)
b. (-5,-3)
c. (5, 3)
d. (-3, -5)

2007-11-26 06:08:51 · 2 answers · asked by x x italian baby x x 1 in Mathematics

a=αr ----->this formula relates the linear acceleration and the angular acceleration


Our teacher just gave us this formula and didn't show us how it was derived.

2007-11-26 06:08:38 · 4 answers · asked by Dora the Exploiter 4 in Physics

After gemstones were fairly divided,
Grumpy's share was 1 diamond and 6 emeralds.

How many emerards equal in value to one diamond?

2007-11-26 06:08:36 · 4 answers · asked by Alexander 6 in Mathematics

What is the furthest distance on earth between two chunks of land whether it be an island or two continents?

2007-11-26 06:08:36 · 6 answers · asked by The Dude 3 in Geography

A 45.0kg child stands near the edge of a merry-go-round in a local park. If the radius of the merry-go-round is 2.50 meters, and the coefficient of static friction between the child's shoes and the surface is 0.6, find the maximum angular speed of the merry-go-round if the child is not to fall off. (Assume the only centripetal force acting on the child is the friction between his shoes and the surface.

2007-11-26 06:06:31 · 1 answers · asked by Roger 1 in Physics

I need help please.

2007-11-26 06:05:49 · 1 answers · asked by bruselee14 1 in Mathematics

2007-11-26 06:02:05 · 12 answers · asked by Anonymous in Geography

A 100 gram meter stick is hung by a string from its center. Masses of 40 grams, 80 grams, and 20 grams are suspended from the stick at the 10 cm, 40 cm, and 70 cm marks respectively. Where should a 50 gram mass be placed to balance the stick?

2007-11-26 06:01:56 · 1 answers · asked by Roger 1 in Physics

2007-11-26 06:00:37 · 4 answers · asked by Anonymous in Biology

Express the function as a Trigonometric function of x.
sin 4x

Theres no need to explain why your doing it, that only confuses me, just show me the steps and answer please. I can then apply that to questions in the same form or sense of the matter.

2007-11-26 05:59:48 · 2 answers · asked by Austin J 1 in Mathematics

2007-11-26 05:59:40 · 4 answers · asked by Anonymous in Medicine

2007-11-26 05:59:33 · 3 answers · asked by Anonymous in Botany

Air conditioner problem... Freon R-22
Determine the actual cooling rate of the unit.
Calculate the rate of heat loss from the air.

-----Pressure (psig)----Temperature (F) ---- Enthalpy (Btu/lbm)
A -- 170 ---------------------- 88 -------------------- 36.345
B -- 113 ---------------------- 64 -------------------- 123.642
C -- 66 ------------------------ 57 -------------------- 110.9135
D -- 172 ---------------------- 150 ------------------ 123.6425

0.4 gallons per minute
Air inlet = 75.7F
Air Outlet = 44F
Average velocity = 1000fpm
Area = 0.47ft2

Given Equations
Qdot = m22dot (hc - hb)
ŋ = Qair / Q22
Q = mdotCpΔT

I have a few equations given, but not sure where to look for the values... for example Qdot = mdot (hc-hb)... how do I find mdot?

2007-11-26 05:59:04 · 2 answers · asked by Anonymous in Engineering

a. It shows that red giant stars have less mass than main sequence stars.
b. It shows that the more massive stars are cooler.
c. It shows that the more massive stars are dimmer.

2007-11-26 05:58:14 · 1 answers · asked by justin c 2 in Astronomy & Space

2007-11-26 05:57:19 · 2 answers · asked by Anonymous in Physics

how would i simplify this expression?

Cos2theta + 1/ costheta

i missed the lecture and didn't get the notes yet... but i still have to do the hwk =\

can someone help me?

2007-11-26 05:56:51 · 1 answers · asked by SK 1 in Mathematics

2007-11-26 05:54:17 · 3 answers · asked by sgal 1 in Physics

3 and 1/3 to 16 and 1/6

How would i go about getting an answer for this.
The answer is 5/4 but i dont know how they got it could someone help please. Thanks

2007-11-26 05:49:45 · 5 answers · asked by Xoni 4 in Mathematics

2007-11-26 05:45:52 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-26 05:44:15 · 2 answers · asked by aka 3 in Geography

2007-11-26 05:43:55 · 5 answers · asked by Anonymous in Mathematics

i remember my grandma used to tell me this. not just lemons but anything sour for that matter- like oranges. is this true or just an old folk story?

2007-11-26 05:37:10 · 4 answers · asked by Anonymous in Medicine

You have a laser with wavelength (λ) 640 nm. You shine it through a diffraction grating of 400 lines per millimeter. You measure the distance to a screen to be 20.3 cm. You measure the second dot in millimeters from the center dot.
What is the wavelength of the laser light?
_____________________[nanometer].
Use three significant figure or N/A if not enough information is given.


please help and explain thanks!!!!

2007-11-26 05:36:21 · 2 answers · asked by Anonymous in Physics

Question: Write an equation in slope-intercept form for the line that satisfies each set of conditions: Slope 0.5, passes through(6,4)

I have all the answers, so whether or not you give me the answer it doesnt matter, I just want to know how to do it ! PLEASE AND Thank you

2007-11-26 05:35:50 · 2 answers · asked by blairep929 1 in Mathematics