Science & Mathematics - 27 October 2007

If yes please tel me a site.

2007-10-27 09:28:27 · 1 answers · asked by Anonymous in Other - Science

Two cars start off at the same point on a straight highway facing opposite directions. Each car drives for 6 miles, takes a left turn, and drives for 8 miles. How far apart are the two cars?

2 miles
11 miles
14 miles
20 miles
26 miles

Do you know the answer? I've been working on it since forever! If you do know the answer, can you share? And please include a rough explanation. Not a long one. Many thanks.

2007-10-27 09:27:45 · 11 answers · asked by XbabynovaX 5 in Mathematics

2007-10-27 09:23:35 · 2 answers · asked by Anonymous in Zoology

above the ground by pulling on a rope weighting 6lb/ft. Set up the integral of how much work is required ( only the integrand)? Let x denote the height above ground.

What is the total work?

2007-10-27 09:23:07 · 2 answers · asked by simonkf2002 1 in Mathematics

tramadol is a pain killer, but i bumped into an old friend and she was saying she has been taken this stuff for fun when clubbing etc what does it do?
i would never touch the stuff myself and told her i thought she was stupid but she says it gives her such a buzz how can pain killers do this?

2007-10-27 09:20:47 · 10 answers · asked by mizzmamma 5 in Medicine

Sorry if this is a really dumb question but my calender says it's tomorrow and I want to be certain so my schedule doesn't get messed up.

Thanks! :)

2007-10-27 09:19:19 · 7 answers · asked by peace and love. 4 in Astronomy & Space

I'm going to need to take a blood test at the hospital that checks for TB, because I'm going to start volunteering. The thing is, is that I smoke pot occasionally...How long before the test do I need to stop smoking, or do I even need to worry about it showing up? Can they tell if you've been smoking if they're looking for TB?

2007-10-27 09:18:38 · 5 answers · asked by tahitiantreat08 1 in Medicine

2007-10-27 09:16:33 · 7 answers · asked by Anonymous in Engineering

http://www.dailymail.co.uk/pages/live/articles/technology/technology.html?in_article_id=489653&in_page_id=1965

2007-10-27 09:13:50 · 4 answers · asked by ? 2 in Biology

Ignoring U, and assuming Q=0

A spring has spring constant k=100N/m

a) Find displacement y produced by external force F=(-10)N.

b) Find total mechanical energy of mass+spring if oscillating with amplitude 10cm.

c) Find transfer by working for mass+spring when you move spring from 15cm to 5cm, assuming no change in kinetic energy.

I get:

a) (-0.1)m

b) 0.5J

c) (-1)J

I would just like some feedback on these answers thank you.

2007-10-27 09:11:39 · 1 answers · asked by eazylee369 4 in Physics

avg. velocity = (initial velocity + final velocity) / 2

2007-10-27 09:02:12 · 3 answers · asked by James 1 in Physics

Are human's today basically genetically the same as human's 1,000 years ago? 5,000 years ago? 10,000 years ago? 20,000 years ago?

People tend to believe the people today are superior in strength and intelligence but is this not only true because we have built opon the achievements of those before us? Is it not true that humans 1,000's of years ago were the same with the same capacity for intelligence. Human's have not evolved in hundreds of thousands of years. Is this not true? The only evolution has been in our technology and knowledge that has accumulated over time by learning from our predecessors, right? No technological knowledge is inate, just learned from those wh invented things and those who made them better. If humans today were put in a world with no technology would it not take them a similar rate to get back to the point that we are at now?

2007-10-27 09:01:40 · 7 answers · asked by Jack B 1 in Biology

Find an expression for the change in entropy when two blocks of the same substance and of equal mass, one at temperature Th and the other at Tc are brought into thermal contact and allowed to reach equilibrium. Evaluate the change for two blocks of copper, each of mass 500 g with heat capacity of 24.4 JK^-1, taking Th=500K and Tc=250K. Thank you very much for responds

2007-10-27 08:56:08 · 1 answers · asked by tchem 1 in Chemistry

Are we so far up our own ****.

2007-10-27 08:54:49 · 8 answers · asked by Francis7 4 in Biology

what is obsidians mineral composition?

2007-10-27 08:52:10 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-27 08:51:31 · 13 answers · asked by Anonymous in Biology

even though they have no magnetic pole to point to?

2007-10-27 08:48:17 · 11 answers · asked by Anonymous in Astronomy & Space

i dont want measuremants and i dont want to know how many miles light travels in a second and i do nt want to calculate anything i also want to know the speed of our fastest space craft. please i want an exact answer like maybe 25 years or 50 years 0r a hundred years and i want it to be in earth years.

2007-10-27 08:31:23 · 5 answers · asked by Anonymous in Astronomy & Space

The combustion of 0.1571 g benzoic acid increases the temperature of a bomb calorimeter by 2.67°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.)?

A 0.2170 g sample of vanillin (C8H8O3) is then burned in the same calorimeter, and the temperature increases by 3.29°C. What is the energy of combustion per gram of vanillin?

2007-10-27 08:25:03 · 1 answers · asked by toocool 1 in Chemistry

2007-10-27 08:23:07 · 9 answers · asked by G 5 in Physics

A 1.397 g sample of thymol, C10H14O(s) (a preservative and a mold and mildew preventative), is burned in a bomb calorimeter assembly. The temperature increase is 11.23°C, and the heat capacity of the bomb calorimeter is 4.68 kJ/°C. What is the heat of combustion of thymol, expressed in kilojoules per mole of C10H14O?

2007-10-27 08:21:21 · 1 answers · asked by toocool 1 in Chemistry

Salicylic acid, C7H6O3, has been suggested as a calorimetric standard. Its heat of combustion is -3.023 103 kJ/mol C7H6O3. From the following data determine the heat capacity of a bomb calorimeter assembly (that is, the bomb, water, stirrer, thermometer, wires, and so forth).


mass of salicylic acid burned: 1.111 g
initial calorimeter temperature: 23.07°C
final calorimeter temperature: 29.55°C

2007-10-27 08:20:53 · 2 answers · asked by toocool 1 in Chemistry

In a coffee-cup calorimeter, 1.20 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.21°C. Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.

2007-10-27 08:20:25 · 1 answers · asked by toocool 1 in Chemistry

something is bothering me, I don't know if it's real or coincidence, but sometimes I can guess what will happen to some things If I focus like close my eyes. Also, most of the time when I'm thinking of something I would encounter it the very same day. For example when I'm thinking of a movie to rent on a rental shop, that very same day I will find it showing on Television which sucks because I waste money, and I always dream of things that I usually spend some time thinking the very same day that why this past few days I started writing some of the things I remember in my dream to see if there is some connection in real life, I'm hoping someone could help me with this, that I'm not going insane. thank you.

2007-10-27 08:20:17 · 4 answers · asked by Anonymous in Paranormal Phenomena

rewrite ln 7 + ln x +5 ln (x^2+9) as a single logarithm ln A
please tell me how to do it i mean explain it to me please because i dunno how to do it

2007-10-27 08:19:30 · 3 answers · asked by star baller 360 5 in Mathematics

2007-10-27 08:16:46 · 3 answers · asked by kishen p 2 in Physics

Im pretty sure it does, but I wanna make sure..

2007-10-27 08:15:38 · 4 answers · asked by . 4 in Engineering

Please i always forget about the main difference and similarities between them !

2007-10-27 08:11:52 · 5 answers · asked by SA 1 in Earth Sciences & Geology

2007-10-27 08:09:42 · 19 answers · asked by JEH 1 in Biology

If you are standing outside and you have no navigational tool (i.e. a compass) how can you tell which way is north. I am doing a project and I need to know which way a creek is flowing.

2007-10-27 08:08:06 · 6 answers · asked by Anonymous in Astronomy & Space