Science & Mathematics - 15 December 2007

find the total distance traveled by the particle from time t=0 until time t=3

2007-12-15 23:44:35 · 6 answers · asked by help! 1 in Mathematics

I have two blowers of 10 HP each fixed on the terrace. One blower is very smooth running and silent whereas second blower is giving vibrations to building structure. Both the blowers are fixed on the same foundation. Dynamic balancing of impeller is ok. Level of pedestal bearings is ok. Pulley alignment is ok. Both the blowers are same, but one is giving vibrations. Help please.

2007-12-15 23:44:14 · 7 answers · asked by Pirate of the Bassein Creek 4 in Engineering

until I start to travel backwards is there a point in between where I can be considered motionless?

2007-12-15 23:22:05 · 8 answers · asked by eazylee369 4 in Physics

it's an interesting question,no?!

2007-12-15 23:15:25 · 4 answers · asked by jubjub firefly 2 in Other - Science

2007-12-15 23:10:24 · 4 answers · asked by jyotirmoy 2 in Mathematics

TABLE A g/cm^3
LIQUID:
A
B
C
D
E
DENSITY, 9m/ml
1.30
0.79
1.60
1.40
8.88

1.) where will a body sink more in fresh water or in a sea water? why?
2.) refer to table A, a solid sinks in all the liquids. which liquid exerst the greatest buoyant force on solid? why?
3.) refer to table A, a stone of density 3g/cm^3 is dropped in each liquid; in which liquid will the stone float?why?
4.)refer to table A,a solid is placed in each liquid and sank in all of them. the volume of liquid displaced is
a.) the samefor the liquids
b.) greatest in liquid E
c.) gratest in liquid B
d.) least in liquid E
e.) leastin liquid A
PROBLEM:
1.) about two third of your body mass consist of water. calculate the volume of water on a 70kg person.
2.) an object weighs 145g in air,135g in water,136.6gin gasoline and132.4g in glycerine.determine the specific gravity of a.) the object b.) gasoline c.) glycerine

-ANALYSIS OF DATA
-CONCLUSION

2007-12-15 23:09:20 · 2 answers · asked by hazz r. 1 in Physics

By what (single step) process does radon-226 decay to francium-236?

a.neutron capture
b.β particle emission
c.α particle emission
d.positron emission
e.electron capture

2007-12-15 22:31:41 · 2 answers · asked by kallystarr 1 in Chemistry

Enriched uranium is uranium that has a greater proportion of ____.

a.plutonium-248
b.uranium-235
c.lead-207
d.uranium-238
e.radium-226

2007-12-15 22:21:38 · 5 answers · asked by Anonymous in Chemistry

The half-life of iodine-123 is 13.2 hours. What percentage of iodine-123 remains in a sample after 36 hours?

a.95%
b.37%
c.85%
d.15%
e.13%

2007-12-15 22:20:49 · 2 answers · asked by Anonymous in Chemistry

at 5:55 am i was outside shoveling the snow thats been building up all day. i seen a bright flash then a LOUD thunder that went on for about 20 seconds. how common is this and how does it happen?

2007-12-15 22:09:02 · 6 answers · asked by Anonymous in Weather

This is a project I have in school, frankly the key leads I have are chemistry and mathematics, on where I should research on first. Can anybody expand it? What are the relation of physics with other sciences? (you could at least give me the name of the science, and I'll probe it for its relation to physics. If your feeling generous however, don't hesitate to anwer this question completely.)

2007-12-15 22:03:30 · 5 answers · asked by kaylo_otee 2 in Physics

Give me websites that suit my query

2007-12-15 21:54:04 · 3 answers · asked by reyansh 1 in Agriculture

I'm guessing its to do with the strength requirement of the signal (conventional radio waves can afford to have poor signal strength but Digital waves can't), but does anyone know the answer for sure?

2007-12-15 21:51:36 · 5 answers · asked by vEngful.Gibb0n 3 in Engineering

2007-12-15 21:36:54 · 31 answers · asked by Anonymous in Astronomy & Space

Do you think it is practical to solve the productivity problem by hiring more programmers or systems analysts?
Why or why not?

2007-12-15 21:35:09 · 2 answers · asked by AhLcYnC 1 in Engineering

2007-12-15 21:29:04 · 13 answers · asked by mozes 2 in Physics

They must be from another world, no fakes from this one please. And no, please don't suggest eBay.

2007-12-15 21:27:28 · 14 answers · asked by Sofa King Good 6 in Astronomy & Space

2007-12-15 21:18:40 · 17 answers · asked by Anonymous in Zoology

y = (lnx)/(ln3). Find y'.

The answer is 1/(xln3). Can someone show the work and rules used?

Thanks!

2007-12-15 21:09:49 · 4 answers · asked by Anonymous in Mathematics

2007-12-15 21:03:08 · 10 answers · asked by Azman M 4 in Astronomy & Space

The hydrogen atoms of a water molecule are bonded to the oxygen atom by __________ bonds, whereas neighboring by __________ bonds.

A) hydrogen . . . ionic
B) hydrogen . . . polar covalent
C) polar covalent . . . hydrogen
D) ionic . . . covalent
E) polar covalent . . . ionic

2007-12-15 20:51:52 · 6 answers · asked by Ken 1 in Biology

I heard Lisa Jardine say, on BBC Radio 4, that 2 is a unique prime number because it is the only even one. Is this not only as significant as saying that 3 is unique because it is the only prime number that is divisible by 3 or that 5 is unique because it is the only prime number that is divisible by 5?

2007-12-15 20:45:14 · 12 answers · asked by Maurice T 1 in Mathematics

nano tech

2007-12-15 20:40:12 · 2 answers · asked by X B 1 in Physics

2007-12-15 20:39:37 · 5 answers · asked by Anonymous in Geography

2007-12-15 20:23:35 · 12 answers · asked by Matthew A 1 in Mathematics

2007-12-15 20:18:09 · 9 answers · asked by Anonymous in Mathematics

I know it's kinda easy to answer this, but I forgot! Is the answer x to the sixth power (x6) or s to the eight power (x8)?

I say it's x6 but my friend disagrees and says it's x8..please help me!! I'm having a beg test tomorrow. Thanks! :D

2007-12-15 20:17:22 · 8 answers · asked by Anonymous in Mathematics

2007-12-15 20:11:45 · 5 answers · asked by Anonymous in Mathematics

2007-12-15 20:08:53 · 17 answers · asked by A7X_skater 2 in Earth Sciences & Geology

A wire of length 1 m. has a resistance of 0.30 ohm. It is uniformly stretched to a length of 2 m. What is its new resistance.

Answers with explanations pls, thank you, i don't know how to relate the old resistance to the new one...

2007-12-15 19:31:51 · 3 answers · asked by Sammy Baby 1 in Physics