Science & Mathematics - 11 February 2007

2007-02-11 03:47:43 · 26 answers · asked by Alicat 6 in Weather

2007-02-11 03:46:40 · 2 answers · asked by saker a 1 in Engineering

I hope it doesn't rain the whole day

2007-02-11 03:46:01 · 6 answers · asked by hottie 1 in Weather

Question: the solar wind is a thin, hot gas given off by the sun. charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force. suppose a charged particle traveling with a speed of 9.0e6 m/s encounters the earth's magnitude of 1.2e-7 T. assuming that the particle's velocity is perpendicular to the magnetic field at an altitude where the magnitude of 1.2e-7 T. assuming that the particle's velocity is perpendicular to magnetic field find the radius of...Find (a) an electron and (b) a proton

My Approach:

(a) electron
r = (9.11e-31)(9.0e6)/ (1.6e-19)(1.2e-7) = 427 m

(b) proton
r = (1.67e-27)(9.0e6)/ (1.6e-19)(1.2e-7) = 7.83e5 m

Book Answer: I don't have the answer to (a); however, for part (b) it is supposed to be 7.83e8 m. it's the reason why im posthing this question! appreciate the help

2007-02-11 03:45:40 · 2 answers · asked by Jimmy 3 in Physics

2007-02-11 03:44:32 · 4 answers · asked by Anonymous in Zoology

2007-02-11 03:43:11 · 14 answers · asked by Anonymous in Astronomy & Space

2007-02-11 03:41:57 · 11 answers · asked by Randal J 1 in Mathematics

Or can one use both terms synonymous?

2007-02-11 03:37:49 · 2 answers · asked by Marike 2 in Biology

2007-02-11 03:37:18 · 4 answers · asked by Andrew 2 in Physics

They made a nest in my corby trouser press. How should I get rid of them?

2007-02-11 03:37:04 · 6 answers · asked by Chunky B 1 in Zoology

Do they hybernate or actually leave the state?

2007-02-11 03:34:46 · 11 answers · asked by D'Graham 1 in Zoology

2007-02-11 03:34:44 · 4 answers · asked by pavan mysore 1 in Medicine

More specifically, if matter can't be created then how is matter even existant in the first place, please clearify this for me.

2007-02-11 03:33:56 · 13 answers · asked by Anonymous in Astronomy & Space

what is the integral of sqrt((a+x)/(b+x))?

2007-02-11 03:31:42 · 3 answers · asked by malibucat1 1 in Mathematics

2007-02-11 03:30:09 · 6 answers · asked by Anonymous in Earth Sciences & Geology

A book contains the following recommended weight for kangaroo: "Give the kangaroo 140 pounds for the first 5 feet plus 5 pounds for every inch over 5 feel tall." Using this description, what heigh corresponds to a recommended weight of 195.

Is the answer 7 foot 2inches?

2007-02-11 03:29:46 · 9 answers · asked by Anonymous in Mathematics

Tangential velocity- is a measure of the distance an object travels along a circular path in a given amount of time. For example, if an object covers 5 seconds, then its tangential velocity is 4 pi meters per second.

A carnival ride at a carnival has seats attatched to the circumference of a larger horizontal wheel. The larger wheel has a radius of 8m and rotates at a speed of 5rpm (rotations per minute). The smaller wheel has a radius of 2 m and rotates at 20rpm.

SEE PICTURE:
http://i7.tinypic.com/2j5z2pc.jpg...

You, in the seat, feel the combined effect of both rotations. For example, suppose you are sitting at point P in the diagram. If v1 is the tangential velocity of point P, the velocity you experience will be the sum of v1 and v2. Find the maximum and mininum velocities you will experience while on the ride. (Give the magnitude only, not the direction.) Expalin your reasoning.

2007-02-11 03:28:23 · 1 answers · asked by Anonymous in Mathematics

2007-02-11 03:26:08 · 8 answers · asked by goring 6 in Astronomy & Space

Circle R passed through points A (6,8) B (16, -4) and C (10, 8). Find the coordinates of the center of the circle.

2007-02-11 03:25:29 · 2 answers · asked by Anonymous in Mathematics

How does the collision theory relate to the rate of a chemical reaction?

2007-02-11 03:23:20 · 5 answers · asked by Ballerina 5 in Chemistry

How do you solve this problem with the equation:
Q = mc (delta) T
What amount of heat is required to heat 5.00 grams of liquid water from 0.00 degrees C to 100.0 degrees C?

2007-02-11 03:23:19 · 3 answers · asked by Anonymous in Chemistry

What is the differece between "inertial mass" as in F=ma, and "gravitational mass" as in F=mg?

Also does it matter if we designate diatance as "x" or "d"?

2007-02-11 03:21:24 · 8 answers · asked by angelgirl 2 in Physics

hello people againe my questioncan you please tell me another theories origin of earth other than the one which alferd hill said .
and please also name the scientist who said it.and please the resources.

when i asked this question some 1 told me:
The big bang theory is one.

Evolution is another.

another 1 told me
1) the big bang theory
2) creation

and that is it

people i need info u can copy and past this info or just tell me the site please

2007-02-11 03:16:04 · 7 answers · asked by Anonymous in Earth Sciences & Geology

I was given some integration questions to do and there were a couple which i didnt know how to go about solving =s

Integrate:

1) [(secx)^2 (1+ (e^x)(cosx)^2) ] dx
2) [(1 + cosx)/(sinx)^2 + (1+x)/ (x^2)] dx

thank you so much if you can help me with these showing the working. hopefully when i get help with the above ill be able to work out the rest

thanks!

2007-02-11 03:14:22 · 1 answers · asked by Anonymous in Mathematics

I heard a story about a six year old girl who got eaten by a Grizzly bear in Tennessee.

Do you think it was just desperate or do bears enjoy eating child flesh?

I hope it was just desperate because I don't really like the idea of child flesh being considered delicious by any lifeform...

2007-02-11 03:13:13 · 11 answers · asked by Zeek 3 in Zoology

2007-02-11 03:12:22 · 1 answers · asked by tomrsubramanian 1 in Engineering

2007-02-11 03:11:04 · 2 answers · asked by David A 1 in Earth Sciences & Geology

for an application where a small amount of warmth is needed, and electrical or other power sources are unavailable... could simple flexing / working of the material generate a small amount of heat, without destroying the material over time.

2007-02-11 03:11:02 · 1 answers · asked by David H 1 in Physics

Isn't it true that scientists determined through red shifting that the equation Energy = (Mass)(speed of light)² is false?

2007-02-11 03:10:54 · 12 answers · asked by Anonymous in Astronomy & Space

2007-02-11 03:09:34 · 4 answers · asked by goring 6 in Astronomy & Space