Science & Mathematics - 26 November 2007

The velocity function is v(t) = t^2 - 6 t + 8 for a particle moving along a line. Find the displacement (net distance covered) of the particle during the time interval [-3,6].

displacement =

2007-11-26 23:59:32 · 3 answers · asked by colin.muller 1 in Mathematics

70.
a. magnesium sulfide
b. nitrogen gas
c. barium hydroxide
d. copper (II) nitride
e. sulfide ion
f. calcium carbonate
g. sodium bromide
h. ferric sulfate

2007-11-26 23:47:49 · 5 answers · asked by Anonymous in Chemistry

2007-11-26 23:44:23 · 18 answers · asked by tmony 1 in Zoology

A lightning flash is seen in the sky and 9.0 s later the boom of the thunder is heard. The temperature of the air is 12°C.
(a) What is the speed of sound at that temperature? [Hint: Light is an electromagnetic wave that travels at a speed of 3.00 x10^8 m/s.]
m/s
(b) How far away is the lightning strike?
km

2007-11-26 23:41:54 · 1 answers · asked by sportzblock 1 in Physics

2007-11-26 23:40:14 · 11 answers · asked by Anonymous in Astronomy & Space

i have a question about acid buffers: acid buffers r usually mixtures of weak acid and a salt of that acid. here we have solutions from HCL and sodium ethanoate, EXPLAIN how this mixture IS a buffer.
thanks :)

2007-11-26 23:36:24 · 3 answers · asked by leyla 3 in Chemistry

2007-11-26 23:26:06 · 3 answers · asked by franchois 1 in Engineering

Whats the function of chiral compounds in medicine?

2007-11-26 23:24:13 · 2 answers · asked by Vanilla`Goddess^_^ 1 in Chemistry

For every action force, there is a simultaneous reaction force equal in in magnitude but in the opposite direction.

Would a catapult be an example of Newton's third law? can someone please give me real life applications, used in society technology or envrionment. Thanks

2007-11-26 23:18:17 · 7 answers · asked by Just wondering 1 in Physics

what are the diff. between HG lamps & sodium lamps ? what are the advantages of sodium lamp over HG lamp. pl. thanks in advance.

2007-11-26 23:06:49 · 1 answers · asked by amshaikh748 1 in Chemistry

2007-11-26 23:06:17 · 5 answers · asked by Dee 1 in Mathematics

These questions are part of my research into Enzyme kinetics:-

1) Where in the yeast cell will this process of alcoholic fermentation take place? Explain your answer?

2) What would you expect to see in terms of carbon dioxide production if there were more oxygen available? Explain your answer?

Thanks a lot for your help. your efforts won't be wasted, i will give 10 points for the best answer!

2007-11-26 23:04:57 · 2 answers · asked by varghese p 3 in Biology

In my English story someone discovers a chemical that can produce electricity more effectively than any other chemical discovered without giving off pollution.

I need a method in which a chemical could produce electricity as/more effectively as any other method of producing electricity.

Can anyone with a better knowledge than me of creating electricity think of a way in which this would work?

This chemical can have any qualities (be magnetic, acidic- ect).

2007-11-26 23:03:49 · 4 answers · asked by Kuy setimram 2 in Chemistry

2007-11-26 22:51:54 · 1 answers · asked by fred 1 in Botany

2007-11-26 22:48:34 · 11 answers · asked by MILIND K 1 in Astronomy & Space

A piece of metal weighs 50 N in air, 36 N in water and 41 N in oil. Find the density of the metal and the density of the oil when the metal is completely submerged in both water and oil.

2007-11-26 22:47:51 · 1 answers · asked by n_is_for_ninja 1 in Physics

2007-11-26 22:46:16 · 9 answers · asked by blue_soul_06 1 in Physics

i have a celestron nexstar 130 SLT all i can see is the creaters on the moon and everything else like mars are just dots in the sky. anything i can look at that i can see big. any ideas.

2007-11-26 22:45:51 · 9 answers · asked by jordan_white69 3 in Astronomy & Space

2007-11-26 22:37:33 · 4 answers · asked by halfkidd 1 in Biology

2007-11-26 22:37:12 · 17 answers · asked by hidro_ap 1 in Mathematics

2007-11-26 22:35:38 · 8 answers · asked by Anonymous in Physics

2007-11-26 22:34:07 · 4 answers · asked by DongKikong 1 in Mathematics

2007-11-26 22:32:21 · 6 answers · asked by pamalick s 1 in Agriculture

and you came across a happily dwelling den of Tasmanian tigers..... would you alert the authorities? or would you just let them be???

2007-11-26 22:30:15 · 5 answers · asked by Anonymous in Zoology

according to newton forces between two bodies is same

so if we consider sun and earth ...both should hav same forces!!!!!

f=ma....as suns mass is hugh than earth so its acc should be less compared to earth in order to blance the force

and earth accelration should be very high
so y not earth gets pull into sun due to high vell


some says centifugal force acts on it but fro where centrifugal force is genrated
only forece genrated is gravitational force and that acts in center


plz solve this

2007-11-26 22:29:11 · 8 answers · asked by Anonymous in Astronomy & Space

2007-11-26 22:24:21 · 3 answers · asked by Anonymous in Earth Sciences & Geology

I also have to discuss covalent and ionic bonding in 1500 words...It's over 20 years since I did chemistry at school and what does science have to do with equine business which is what i'm studying...Does anyone have any useful advice PLEASE

2007-11-26 22:14:10 · 3 answers · asked by . 6 in Chemistry

to find x
logb(x)=2/3logb(8)+1/2logb(9)-logb(6)

2007-11-26 22:10:30 · 4 answers · asked by Anonymous in Mathematics

2007-11-26 22:08:47 · 5 answers · asked by Sonia 2 in Geography

y = lim(n~infinity) (1+x)(1+x^2)(1+x^4)(1+x^8)......(1+x^2n)

Find dy/dx?
Can anyone help...

2007-11-26 21:50:33 · 3 answers · asked by ananya j 2 in Mathematics