Science & Mathematics - 27 November 2006

Calculate the kinetic energy of a hydrogen atom moving at a speed of 3055 m/s (In Joules)

2006-11-27 09:16:24 · 2 answers · asked by Anonymous in Chemistry

2006-11-27 09:13:34 · 12 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-27 09:12:58 · 5 answers · asked by a s 1 in Chemistry

2006-11-27 09:12:02 · 3 answers · asked by Savannah 2 in Geography

pls put in a reasonable answer!love ya thanks

2006-11-27 09:11:03 · 6 answers · asked by christie d 2 in Biology

Tom and Alice work independently in an attempt to solve a certain problem, i.e. whether one of them solves it does not affect the chances that the other will solve it. The probability that Tom solves it is 0.25 and the probability that Alice solves it is 0.5.

What is the probability that the problem will be solved?

If the problem is solved, what is the probability that Tom solves it?

2006-11-27 09:11:00 · 2 answers · asked by Anonymous in Mathematics

2006-11-27 09:10:33 · 4 answers · asked by Anonymous in Physics

2006-11-27 09:10:09 · 5 answers · asked by Anonymous in Mathematics

2006-11-27 09:09:11 · 9 answers · asked by bardolatress 1 in Biology

2006-11-27 09:09:07 · 5 answers · asked by cutegirls6594 2 in Astronomy & Space

This is whats givin:

f(x,y)={((x^2)y)/(x^2+y^2) (x,y) <> (0,0)
{0 (x,y) = (0,0)


I need to use the definition of a partial derivative of the limit.

Hence i use:

fx (or fy) = lim h-->0 [(f(x+h,y) - f(x,y))/h]

do i just subsitute x+h for x. so ill have ((x+h)^2)y and so one.

If so, it presents me with an equation i would have a hard time solving, i know how to do a partial derivitive using the normal rule for derivatives.

Key areas of concern is how the original equation is given to me...I am given 2 equations with two seperate values that (x,y) can or cant be. How do i deal with. Also, the near impossible equation that developes, is it really that complexe or am i missing and easy step to simplify. Help is much appreciated.

2006-11-27 09:07:41 · 1 answers · asked by Anonymous in Mathematics

2006-11-27 09:07:40 · 2 answers · asked by Devendra Singh Parihar 1 in Engineering

2006-11-27 09:07:02 · 12 answers · asked by cutegirls6594 2 in Astronomy & Space

2006-11-27 09:06:32 · 11 answers · asked by Anonymous in Engineering

2006-11-27 09:05:41 · 2 answers · asked by Nicole J 1 in Chemistry

PLEASE HELP!

2006-11-27 09:05:11 · 3 answers · asked by Deliriouz 1 in Mathematics

two wheels of raius 15.9 cm and 14.29 cm respectively rest on the ground. IF the centers of the wheels are 37.85 cm apart, how far apart are the points where they touch the ground?

answers can be 34.35cm, 37.85 cm, 37.82cm or 35.05 cm

2006-11-27 09:04:36 · 7 answers · asked by lynn l 1 in Mathematics

What is the process that allows water to enter the air called?
a) Evaporation
b) Condensation
c)Precipition

Answer correcly please!!!!!!!!1111

2006-11-27 09:03:41 · 11 answers · asked by ? 2 in Earth Sciences & Geology

2006-11-27 09:03:24 · 8 answers · asked by Anonymous in Engineering

science homework, need i say more.

2006-11-27 09:02:35 · 3 answers · asked by nba_honey08 1 in Mathematics

An atomic nucleus initially moving at 420m/s emits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 350m/s. If the alpha particle has a mass of 4.0u and the original nucleus has a mass of 222u, what speed does the alpha particle have when it is emitted.
plzzzzzzzzzz help me and give me the formula to find it.

2006-11-27 09:00:15 · 5 answers · asked by nice_ girl 1 in Physics

im stumped and this is a trick ? my Social studies teacher wanted me to get. ive gotten all diffeernt answers so...???

2006-11-27 08:59:45 · 9 answers · asked by Valerie H 2 in Geography

2006-11-27 08:58:22 · 6 answers · asked by Amor Mia 1 in Physics

I have taken a probably unhealthy interest in physics, especially in the field of the elctromagnetic spectrum. Problem is, I do not yet know how these waves are created, for example in microwave ovens. A friend told me that some are created by oscillating a current through, say, a copper coil at a particular frequency. Is this true? and if so, what types/bands of the elctromagnetic spectrum does this work for?

2006-11-27 08:56:25 · 1 answers · asked by i.mason1@btinternet.com 1 in Physics

Well, we know that every living thing has something called DNA in the nucleus. A human being has DNA, so does an apple. I just wonder what happens to DNA of the apple when we eat it. Does it become a part of us, or our DNA or what?

I know, this question sounds very stupid, but just wondering...

2006-11-27 08:55:25 · 4 answers · asked by Anonymous in Biology

2006-11-27 08:54:53 · 3 answers · asked by Brittney B 1 in Chemistry

2006-11-27 08:53:59 · 6 answers · asked by brittany g 1 in Earth Sciences & Geology

find the derivative of the funtion

2006-11-27 08:53:52 · 3 answers · asked by c205 1 in Mathematics

There are three famous problems of antiquity which are trisecting a given angle, squaring the circle, and doubling the cube.

2006-11-27 08:47:50 · 3 answers · asked by Marc T 1 in Mathematics

2006-11-27 08:46:47 · 2 answers · asked by Un Known 1 in Chemistry