Science & Mathematics - 14 December 2006

2006-12-14 06:53:09 · 7 answers · asked by CHASITY S 1 in Chemistry

The activation energy for a particular reaction is 34.6 kJ/mol at a temperature of 300 K. At what temperature will the reaction rate double?

2006-12-14 06:52:12 · 3 answers · asked by Anonymous in Chemistry

its raining here non stop, and wereon flood watch!! NOT GOOD!!

2006-12-14 06:52:05 · 46 answers · asked by ? 2 in Weather

2 cos^2x-square root 3 cosx = 0

2006-12-14 06:50:29 · 5 answers · asked by Micki E 2 in Mathematics

2006-12-14 06:47:45 · 7 answers · asked by CrAzy WaRriOr 1 in Astronomy & Space

How do you calculate it? (Cn being the number ions of the species which surround the other ion
in a lattice, i.e. in CsCl, Cl's Cn is 8, so for every Cs+ ion there are 8 Cl- ions around it)

2006-12-14 06:47:19 · 4 answers · asked by Stannnn 3 in Chemistry

I got in an argument today with my College Algebra and Trig (cat) professor about the fact that "imaginary numbers" are pure bullshit. You simply cannot get an answer for a negative square root. so, does anyone have any logic reason why the exsist other than to appease the people who think there HAS to be an answer for everything?

2006-12-14 06:47:03 · 12 answers · asked by Anonymous in Mathematics

2006-12-14 06:46:15 · 7 answers · asked by Micki E 2 in Mathematics

2006-12-14 06:44:39 · 8 answers · asked by Lou@venture 1 in Zoology

2006-12-14 06:44:34 · 7 answers · asked by Micki E 2 in Mathematics

2006-12-14 06:43:05 · 14 answers · asked by Anonymous in Physics

no square root on the 2 just on the 3!

2006-12-14 06:43:02 · 5 answers · asked by Micki E 2 in Mathematics

2006-12-14 06:42:31 · 7 answers · asked by Magzilla 2 in Mathematics

2006-12-14 06:42:12 · 4 answers · asked by Anonymous in Medicine

The calander I have is all wrong.... I think there are 27 days in a full lunar cycle and if there was a full moon on the 4th then there would be a blue moon on the 31st.... Its either gotta be this month or next Right?

2006-12-14 06:42:06 · 3 answers · asked by MENTALLY UNSTABLE MAN 3 in Astronomy & Space

Comparing factors using SPSS

2006-12-14 06:41:31 · 4 answers · asked by SMILE06 1 in Mathematics

sometimes in the sky, u can see some start that twinkle more than other. that is they appear more brighter than other... i was just wondering why it's like this????

2006-12-14 06:41:15 · 7 answers · asked by Anonymous in Physics

I have a B.A. in Communications and very few math or science undergraduate classes. I work full time as a design engineer, and need the quickest and most cost effective plan to prepare for graduate school.

2006-12-14 06:41:11 · 5 answers · asked by leighann 1 in Physics

2006-12-14 06:39:06 · 6 answers · asked by james c 2 in Biology

2006-12-14 06:39:00 · 2 answers · asked by Anonymous in Engineering

Pl suggest of some good sites where I can appear for test paper's which has mathematical question's on permutation & equation's etc besides some general reasoning question's.Thanks

2006-12-14 06:37:36 · 5 answers · asked by pramodvpacher 1 in Mathematics

200.0 Joules of heat is required to raise the temperature of an object sample by 3.00ºC. If the specific heat of the object is .01490 J/gºC, what is the mass of the sample in kilograms?

0.993 x 10-3 kg
4474.3 kg
4.474 kg
40.268 kg
0.067 kg


A 2.00-kg metal object requires 5020 J of heat to raise its temperature from 20.0°C to 40.0°C. What is the specific heat capacity of the metal?

126 J/(kg • °C)
106 KJ/(kg • °C)
126 cal/(kg • °C)
142 kcal(kg • °C)


1146 joules of heat is released when a 100.0 gram sample of an unknown metal cools from 95.00°C to 65.00°C. Determine the specific heat of a metal.

2006-12-14 06:37:30 · 3 answers · asked by queenpravato 1 in Chemistry

Atmospheric pressure only supports a column of water ~34 feet, so atmospheric pressure is not how water reaches the top of the tree.

2006-12-14 06:36:33 · 6 answers · asked by Grog 1 in Earth Sciences & Geology

2006-12-14 06:36:14 · 12 answers · asked by Judi*LUFC 1 in Geography

I'm really afraid of spiders! No matter what size it is. The embrassing fact is that I'm afriad to use the bathroom because we have like two spiders up in the corner of the ceiling and I'm afraid they'll come down and bite me. So yeah, do they bite?

2006-12-14 06:35:24 · 19 answers · asked by Danys M 2 in Zoology

For example, you have a stand-alone room fan with three speeds - low, medium, high. It seems that often the fan switch will go from "off" to "high", then "medium", then "low". This seems counter-intuitive, and also a waste of energy if you just want the fan to be on the low setting.

In a car, you never see this design on the blower knob for the air conditioner. That always goes from low to medium to high, as one would expect.

2006-12-14 06:34:56 · 6 answers · asked by cmsb705 5 in Engineering

i) Express 3x^2+12x+7 in the form 3(x+a)^2+b

ii) Hence write down the equation of the line of symetry of the curve y=3x^2+12x+7

also can you show me how you worked it out please!
all help greatly appreciated thanks!

2006-12-14 06:34:01 · 7 answers · asked by Natalie 1 in Mathematics

The Theory of Evolution does not say that we came from monkeys. it simply states that things change over time. i am sick and tired of ppl denying it exists because the truth is that it does. Everything living evolves, we evolve but NOT from monkey/apes thay are in a diff family. plants evolve, etc etc. it is crap that some skool dont teach it, it is a simple little theory that is in fact true and it is important for the comprehension on most sciences, so those skools are almost setting their students up for failure!

2006-12-14 06:32:52 · 14 answers · asked by anom 2 in Biology

1) A person wears a hearing aid, which makes a sounds louder by 30 dB.

This means the sound intensity is increased______times
This means the amplitude of the soundwave is increased _____times


2) A hand holding a rope moves up and down to create a transverse wave on the rope. The hand completes an oscillation in 1.9 s, and the wave travels along the string at 0.5 m/s. The amplitude of the wave is 0.05 m.

a.) Find the frequency at which the crests pass a given point in space.

b.) Find the distance between two adjacent crests on the wave.

c.) There is a blue spot drawn onto the rope with a magic marker. Find the distance this spot travels in one period.

2006-12-14 06:30:36 · 3 answers · asked by corinna 2 in Physics

2006-12-14 06:30:21 · 7 answers · asked by Magzilla 2 in Mathematics