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Science & Mathematics - 25 November 2007

[Selected]: All categories Science & Mathematics

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lim (x,y) --> (3,2) ((y-2)^2)ln(y-1) / ((x-3)^2)+((y-2)^2)

use any two paths that pass through (3,2) to guess what the limit may be

2007-11-25 06:59:14 · 1 answers · asked by Anonymous in Mathematics

The following is a link to the diagram containing the problem:
http://i7.photobucket.com/albums/y281/cowmoocher/IMG.jpg

Thanks in advance :}

2007-11-25 06:59:11 · 1 answers · asked by kat 2 in Physics

A simple pendulum, 2.0m in length, is released with a push when the support string is at an angle of 25° from vertical. if the intial speed of the suspensed mass is 1.2 m/s when at the release point, what is its speed at the bottom of the swing?

2007-11-25 06:58:02 · 1 answers · asked by Afolly babe 1 in Physics

2007-11-25 06:57:58 · 1 answers · asked by Lisa R 2 in Mathematics

2007-11-25 06:55:23 · 14 answers · asked by Anonymous in Physics

Adult tickets for a play cost $8 and child tickets cost $6. If there were 25 people at a performance and the theater collected $188 from ticket sales, how many adults and how many children attended the play?
Showing work please

2007-11-25 06:52:53 · 3 answers · asked by Gwen B 1 in Mathematics

dragsters often set their tires on fire to soften the rubber and increase the coefficient of friction to nearly 5.0. What role does friction play in accelerating the dragster?

2007-11-25 06:48:29 · 8 answers · asked by Aitu4 3 in Physics

QUESTION: I need to write out this word equation using formulaes: (is my answer right)

1) Aluminum nitrate reacts with lithium sulphate to form aluminum sulphate and lithium nitrate.

ANSWER: Al(NO3)3 + Li2SO4 ---> Al2(SO4)3 + LiNO3

(IS THAT RIGHT?)

2007-11-25 06:46:25 · 1 answers · asked by ®åp Muziκ™ 6 in Chemistry

hhhhhhhhhhhhhheeeeeeeeeeeeelllllllllllllllllllllllllllllllppppppppp

2007-11-25 06:45:58 · 4 answers · asked by Alla Y 1 in Earth Sciences & Geology

any links to sites that might help as well?

2007-11-25 06:45:13 · 2 answers · asked by Anonymous in Mathematics

A shiny new sports car sits in a parking lot of a car dealership. Above is a cargo plane, flying horizontally at 48 m/s. At the exact moment the plane is 130 m directly above the car, a heavy crate accidentally falls from its cargo doors. Relative to the car, where will the crate hit?

2007-11-25 06:43:28 · 2 answers · asked by Anonymous in Physics

A cannonball launched with an initial velocity of 146 m/s at and angle of 30° follows a parabolic path and hits a balloon at the top of its trajectory. Neglecting air resistance, how fast is it going when it hits the balloon?

What is the acceleration of the cannonball just before it hits the balloon?

2007-11-25 06:42:17 · 2 answers · asked by Anonymous in Physics

Two black mice were mated over several years and produced 29 black and 9 white offspring. What are the most likely genotypes of the parents? Use B for black allele.

2007-11-25 06:40:06 · 2 answers · asked by Anonymous in Biology

what's the point of taking it?

2007-11-25 06:37:21 · 12 answers · asked by Anonymous in Medicine

Assume that at the top of a pole vault, the athlete's speed is zero. The safety mat is 0.40m thick!

Apply the law of conservation of energy to determine the maximum speed with which the athlete lands after clearing the crossbar set at 4.6m

I realize that it might be a bit difficult because this will require both physics and sports knowledge, none of which I acquire

2007-11-25 06:35:05 · 2 answers · asked by Anonymous in Physics

Three Friends


Three friends, Andrew, Bernard, and Claude, leave at the same time and place to go to town, 8 miles away. Andrew starts on foot. Bernard takes Claude in his car. After a certain time Claude gets out of the car and goes on, walking. Bernard drives back to Andrew, takes him in the car, and drives him to town. All three arrive at the same time. Andrew and Claude both walk at a constant speed of 6 mph. Bernard drives at a constant speed of 30 mph. How long did the trip last?


can u plz give me a process?

2007-11-25 06:34:54 · 4 answers · asked by Anonymous in Other - Science

Yi Chen made a $6,400 investment at the beginning of a year.By the end of the year, the value of the investment had decreased by 8.2%.What was value at the end of the year

2007-11-25 06:33:53 · 8 answers · asked by Jessica J 1 in Mathematics

why animals at the top of the food chain are particularly at risk from poisons in the environment????

2007-11-25 06:33:48 · 3 answers · asked by RoxyGurl98 1 in Earth Sciences & Geology

i have the numbers for A, B, C, , X-intercept, Y-intercept, standard form, slope-intercept form...A=4, B=-3, C=2, X-intercept=(.5,0),Y-intercept=(0,.66), slope-intercept form=y=4/3x+2/3

2007-11-25 06:30:59 · 2 answers · asked by Shirley H 1 in Mathematics

OK.... i need serious help with science..Were studying rocks and were doing a rock collection and i need to know .....Is the rock Quartz, an intrusive rock or an extrusive rock? AND ....Is Quartz coarse-grained or fine-grained?......THANKS SOO MUCH!!!!

2007-11-25 06:30:58 · 2 answers · asked by LindonRose 2 in Botany

its math

2007-11-25 06:30:37 · 17 answers · asked by Jessica J 1 in Mathematics

What is the formula for net work?

The formula for potential energy change?

An Amount of work equal to 1.5J is required to compress the spring in a spring-gun. what is the launch speed of a 15-g marble?

2007-11-25 06:29:39 · 1 answers · asked by Afolly babe 1 in Physics

Given: density of water = 1000 kg/m^3 and
specific heat of water = 4186 J/kg * degrees Celsius
In a showdown on the streets of Laredo,
the good guy drops a 15.8 g silver bullet, at
a temperature of 44 degrees C, into a 31 cm^3 cup
of water at 41 degrees C. Simultaneously, the bad
guy drops a 15.8 g copper bullet, at the same
initial temperature, into an identical cup of
water.
What is the coolest final temperature? (In
other words, which one ends the showdown
with the coolest cup of water in the West)?
Neglect any energy transfer into or away from
the container and assume the specific heat
of silver and copper are 234 J/kg * degrees C and
387 J/kg * degrees C (respectively). Answer in units of degrees C. Your
answer must be within 0.01% of the correct answer

2007-11-25 06:27:59 · 1 answers · asked by Handiman 3 in Physics

I was sick and missed class and homework is due tomorrow.

2007-11-25 06:27:56 · 3 answers · asked by Anonymous in Mathematics

how to find the divF and curlF for F(x,y,z)= ln x i+e^(xyz) j+tan^(-1)(z/x) k

i am stick at the derivvative e^(xyz) and tan^(-1)(z/x)

2007-11-25 06:27:32 · 1 answers · asked by Anonymous in Mathematics

How much can be earnt and how do you go about it?

2007-11-25 06:25:18 · 7 answers · asked by Beast from the East 4 in Medicine

1. R-90°
2. R90°
3. ry=x
4. rx-axis

2007-11-25 06:21:32 · 3 answers · asked by Anonymous in Mathematics

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