Science & Mathematics - 22 October 2006

The question asks:
Find the acceleration of a car whose initial speed is 30 m/s and slows uniformly to 10 m/s in 5 seconds. Then, determine the distance it travels in the 3rd second (t=2 to t=3).
Is this right?
a) Acceleration:
10m/s -30m/s / 0s - 5s = -20m/s / -5m/s = 4m/s^2

b)Distance:
X3= 30m/s(3s) + 1/2(4m/s^2)(3s)^2 = 90m+18m= 108m
X2= 30m/s(2s) + 1/2(4m/s^2)(2s)^2 = 60m+ 8m = 68m
X =108-68=40m

2006-10-22 12:07:37 · 2 answers · asked by crazed1511 1 in Physics

what is the arrpoxamate density of an egg
?????????????????????????????????????????????????????????????

2006-10-22 12:06:21 · 4 answers · asked by Cristi 2 in Other - Science

they are transfused.

2006-10-22 12:06:04 · 9 answers · asked by Anonymous in Medicine

Someone posted this and others made fun of it, so she withdrew the question!!!! I thought it was brilliant. The people who made fun of it have no imagination and should have been reported as abusers and removed.

2006-10-22 12:05:20 · 19 answers · asked by Anonymous in Zoology

If you observe blood coagulation on a slide when you mix drops of a patient's blood with anti-A antibodies, but not anti-B antibodies, what is the patient's blood type?

2006-10-22 12:05:19 · 7 answers · asked by Christopher R 1 in Medicine

Jeff and Darleen bought a house for $74,000. After making a $4000 down payment, they took out a $70,000 mortgage at 7% compounded semiannually for 30 years. How large are their semiannual payments to cover the principal and interst? and How much total moeny will they wind up paying fo th house?

2006-10-22 12:03:32 · 4 answers · asked by lostinmath 1 in Mathematics

a 12600kg railroad car travels on a level frictionless track with constant speed of 18m/s. a 5350 kg load, initially at rest, is dropped onto the car. what will be the car's new speed?

How do I do this problem. where do i start??

2006-10-22 12:02:22 · 2 answers · asked by Anonymous in Physics

2006-10-22 12:02:15 · 3 answers · asked by hockiguy419 1 in Zoology

2006-10-22 12:00:29 · 2 answers · asked by mintai2003 2 in Chemistry

I know how it spreads, because the magma from the ridges push up right? but then how can the RATE be DETERMINED? hooooow like looking at all the evidences, how theres the magnetic pull stuff...

i also have a data chart of the magnetic orientation of some rocks from the mid-atlantic ridge...

2006-10-22 11:59:24 · 6 answers · asked by Anonymous in Earth Sciences & Geology

http://flickr.com/photos/heysemberg/275800141/

2006-10-22 11:59:11 · 4 answers · asked by CharWiz 3 in Zoology

acceleration is...

1. south east
2. north east
3. east
4. south
2. no acceleration

2006-10-22 11:59:08 · 1 answers · asked by 8 3 in Physics

Ok so when is the next full moon? It's Oct. 22nd, 2006. Will there be a full moon on Halloween?

2006-10-22 11:55:58 · 9 answers · asked by lil_angel 2 in Astronomy & Space

I'm on the last question for my homework and I don't get how to do it, here it is...

An unknown element named Renegadium (Rg) consists of four isotopes Rg (A) mass # 281, Rg (B) mass # 282, Rg (C) mass # 283, Rg (D) mass #284. Isotope C has a percentage abundance of 2.00%. Isotopes A and D have the same percentage abundance. Calculate the percent abundance of A, B and D.

2006-10-22 11:54:10 · 3 answers · asked by Silentspeedster 2 in Chemistry

2006-10-22 11:50:05 · 2 answers · asked by bam4ever13 1 in Chemistry

The experiment involves testing the ph levels.
I need two differnt temperatures.

2006-10-22 11:48:57 · 1 answers · asked by sweetcheeks 1 in Chemistry

thanks for the help...

2006-10-22 11:48:28 · 2 answers · asked by ryboyin 4 in Chemistry

ok i am supposed to write an essay [650-700 words] on how i can conserve energy for my future. I just realized that one of the topics was-- how can YOU conserve energy at school, home, and in the community. I wrote about how basically other ppl can conserve energy. but i cant change it to me because it's stuff like fixing the leaking sinks.. so yea. and it's not like i can find on the internet how I can conserve energy at school, home, and my community. so could you please help me!! i am like braindead!!
thanks.

2006-10-22 11:44:47 · 8 answers · asked by C M 3 in Other - Science

2006-10-22 11:43:39 · 4 answers · asked by Anonymous in Biology

My math problem says solve the equation on the interval 0< (theta)<2(pi)
sorry I do not have the proper keys on my keyboard...bear with me...

the question says

csc(3x)=0 (lets say x means theta)

this is not possible right? the solution would be undefined...?

please help I think the answer is undefined. am I right?

2006-10-22 11:43:03 · 6 answers · asked by Anonymous in Mathematics

YOU HAVE TO ADD ALL NUMBERS

2006-10-22 11:42:24 · 13 answers · asked by hayley m 1 in Mathematics

time of flight...

1. increases and horizontal range decreases
2. decreases and horizontal range decreases
3. increases and horizontal range increases
4. decreases and horizontal range increases
5. stays constant but horizantal range decreases

2006-10-22 11:41:59 · 4 answers · asked by Anonymous in Physics

Which of the following compounds present exceptions to the octet rule ?


a) NH4+


b) XeF4O


c) XeO4


d) ClO3-


e) NF3


you must enter all true statements alphabetically in one lower case group,
e.g., if a) b) and e) are true you would enter abe

2006-10-22 11:41:20 · 3 answers · asked by MARK 2 in Chemistry

destination? (is it north west)

Another question,
if a plane wants to fly south-west and a wind makes it go west, is the wind coming from the north-west?

2006-10-22 11:37:42 · 4 answers · asked by Anonymous in Physics

a 0.1025-g sample of copper metal is disscolved in 35 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 200.0 mL. Calculate the molarity of Cu2+

2006-10-22 11:37:35 · 2 answers · asked by Anonymous in Chemistry

I once heard an idiot say that NASA is just a waste of money, that all they ever did for us was go to space. Just to see how smart everyone is, besides TANG, what else has NASA given us?

2006-10-22 11:37:08 · 28 answers · asked by Anonymous in Astronomy & Space

2006-10-22 11:36:55 · 4 answers · asked by Mountain Lover 2 in Mathematics

diet coke+mentos=volcanic eruption

2006-10-22 11:36:47 · 3 answers · asked by pslhardcore 1 in Chemistry

2006-10-22 11:36:44 · 9 answers · asked by pinhed_1976 6 in Astronomy & Space

Do you think there may be other life form in other planet? As you know that our solar system is just a little tiny one in the whole universe!

2006-10-22 11:36:25 · 28 answers · asked by Nick 2 in Astronomy & Space