Science & Mathematics - 23 July 2006

2006-07-23 09:12:43 · 8 answers · asked by pradeep n 1 in Chemistry

Which one of the two options offers more job opportunities? Can you work in a microbiology lab as a biomedical/clinical scientist? I'm undecided about which major to pursue in college.

2006-07-23 09:12:31 · 7 answers · asked by curious 1 in Biology

We had "insane" weather yesterday.Now,another storm's coming and the barometer's dropping.(by insane I mean small tornadoes,lightning causing small fires and we're in the ca. desert.)

2006-07-23 09:12:25 · 3 answers · asked by L.T. 4 in Weather

2006-07-23 09:11:29 · 4 answers · asked by MBK 7 in Weather

I was wondering if someone can help me with this problem now:
A. Calculate the mass of 500. atoms of iron [Fe]. [three sig figs]
B. How many Fe atoms and how many moles of Fe atoms are in 500.0 g of iron? [4 sig figs]

Please keep in mind of the Significant Figures [sig figs] in both parts.
Can someone try and explain how one would approach this problem? =/ Thanks in advance to anyone who can help. :]

2006-07-23 09:09:04 · 3 answers · asked by sooper mouse! 2 in Chemistry

I have built a turbo jet engine, I have a spinning shaft off the compressor side of the turbocharger. I need to send a light beam onto the shaft then because the shaft as 6 points I should be able to count the rpms that make and brake the light. what type of light beam? can I use a 555 timer that can be triggered by the light beam and then send it to a digital counter? I have used a 555 timer in my ignition system that pulses a coil to spark the spark plug, that ignites the propane. so how and what type of light beam with the 555 is the question. thanks for all input, dave

any ideas for this project would be greatly apreaciated.
http://www.davesjetengines.com

2006-07-23 09:08:48 · 4 answers · asked by duster360 4 in Engineering

To alter or consume CO/CO2 emissions so that it doesn't harm the atmosphere. There's gotta be a way(I believe we just haven't found it yet) to USE/RE-USE the harmful emissions to our advantage.

2006-07-23 09:04:46 · 7 answers · asked by 1/6,833,020,409 5 in Chemistry

2006-07-23 09:04:32 · 20 answers · asked by weed 1 in Weather

Basically, when the system stops moving, do all the masses remain in contact due to the gravitational attraction or is there some space between the masses when they stop?

2006-07-23 09:03:44 · 2 answers · asked by Gravity Boy 1 in Physics

2006-07-23 09:03:28 · 8 answers · asked by al_ex_and_ria 1 in Other - Science

I know integration by parts, that's not what I'm interested in. Risch is a very advanced integration algorithm that I'm trying to get to grips with.

2006-07-23 08:56:01 · 2 answers · asked by Donovan L 1 in Mathematics

We own a Titan II missile site. We have excavated the access portal (a shaft 20'x20'x50'deep) and have gained access to the cableway leading to the launch control center. This is a 3 story circular building 45' in diameter. The cableway (tunnel) connects to the control center at the middle floor (50' underground) and there are then stairs leading upstairs to the crew quarters or downstairs to the main chiller system for the site. The air in the control center (all three floors) is very stale even though it is a constant 72 degrees. I want to know how I might go about exchanging the stale air for fresh air so I might be able to start cleaning out the control center. I can get power to the site via an extension cord. I look forward to your assistance on this neat project. Thanks.

2006-07-23 08:55:49 · 2 answers · asked by The Answer Man 2 in Engineering

2006-07-23 08:55:07 · 4 answers · asked by dat dude 1 in Earth Sciences & Geology

2006-07-23 08:52:49 · 2 answers · asked by yonas_2 1 in Mathematics

2006-07-23 08:52:24 · 1 answers · asked by christine2550@sbcglobal.net 2 in Earth Sciences & Geology

since sun is continously exhausting the gas of its own by huge burning what happens in the near future

2006-07-23 08:48:39 · 10 answers · asked by sekh 1 in Other - Science

2006-07-23 08:46:33 · 2 answers · asked by zakari m 1 in Engineering

2006-07-23 08:45:31 · 11 answers · asked by atiq 2 in Astronomy & Space

2006-07-23 08:44:37 · 12 answers · asked by nosnibor_jay 2 in Astronomy & Space

tell me unidentified flying objects are really reality. or some stupids persons mentatilty ?wat is truth abt u f o?

2006-07-23 08:43:55 · 7 answers · asked by Anonymous in Other - Science

If an asteroid is approaching earth at 12 miles per second, and it's closest point of approach is 100 miles directly above the North Pole, What would the affect be on the planet?

2006-07-23 08:42:40 · 10 answers · asked by davenc19482000 1 in Astronomy & Space

For example, a question asks "How many formula units of BaNO4 are contained in 236 g?".

2006-07-23 08:41:15 · 2 answers · asked by spks3707 2 in Chemistry

2006-07-23 08:40:57 · 16 answers · asked by Demeter 5 in Zoology

An equivalence relation is a binary relation which satisfies the properties:

1) a~a (reflexivity)
2) if a~b then b~a (symmetry)
3) if a~b and b~c then a~c (transitivity)

Find the error in the following argument:
The reflexive property is redundant in the axioms for an equivalent relation. If x~y, then y~x by the symmetry property. Using the transitive property, we can deduce that x~x.

Can you find another axiom to replace axiom 1 such that the other two axioms do imply the new axiom 1?

2006-07-23 08:40:43 · 6 answers · asked by Math_Guru 2 in Mathematics

I’m fairly familiar with the standard twin paradox, but I’ve never seen the paradox adequately resolved for a closed universe. Closed in the sense that if you travel in a fixed direction long enough, you’ll end up where you started; like if space were the surface of a hyper-sphere.

Anyone know how to resolve it? What would happen if two twins set out in opposite directions and (assuming the universe is closed) they ran into each other again? Calculations made by either of them would yield that the other should be older and they could ask each other who was the younger via radio transmissions without necessarily stopping.

I’ve seen one person resolve it (in “American Mathematical Monthly”) by saying that there IS a preferred reference frame in the universe, but that kind of flies in the face of one of the basic postulates of Relativity.

(Just FYI this stumped my physics professor, but he specializes in Particle Physics not Cosmology)

2006-07-23 08:39:42 · 3 answers · asked by Anonymous in Physics

2006-07-23 08:36:44 · 7 answers · asked by superhomer1221 2 in Mathematics

I have always wondered what happened to the other dollar!!
Three men rented a room on a business trip. They were charged $30.00 for the room. Each man paid $10.00. The clerk started feeling guilty about overcharging the gentlemen. So he called the bellboy and gave him $5.00 to give back to the men. The bellboy wondered how on earth he was going to divide $5.00 between three men. So he took $2.00 and gave $1.00 back to each man. Out of there pocket, how much did each man pay for the room? Answer is $9.00. 9 times 3=27 plus the 2 dollors the bellboy put in his pocket makes $29.00. Where on earth is the other dollar......??????????????? TALK TO ME TALK TO ME!!!!!

2006-07-23 08:31:39 · 13 answers · asked by whenwhalesfly 5 in Mathematics

please explane

2006-07-23 08:31:36 · 7 answers · asked by Anonymous in Physics

Would it be gravitational time or inertial time?

2006-07-23 08:22:00 · 2 answers · asked by goring 6 in Physics

2006-07-23 08:18:30 · 4 answers · asked by atiq 2 in Astronomy & Space