Science & Mathematics - 4 December 2007

2007-12-04 01:10:19 · 8 answers · asked by Anonymous in Mathematics

2007-12-04 01:08:30 · 7 answers · asked by Anonymous in Mathematics

2007-12-04 01:06:42 · 4 answers · asked by Anonymous in Zoology

A. diodes
B. protons
C. electrons
D. neutrons

2007-12-04 01:06:05 · 5 answers · asked by Anonymous in Physics

My question is, with NASA's focus on the moon, mars, and beyond, can the international space station remain a relevant par of the united states space program? Why or why not?

please include some website or something where i can find reference and where on the page it is. <--- please do if u can :)

2007-12-04 01:04:28 · 4 answers · asked by Anonymous in Astronomy & Space

State what is meant by base-pairing and indicate the nature of the chemical bonds involved.

2007-12-04 01:04:25 · 2 answers · asked by Roy S 1 in Chemistry

2007-12-04 01:03:23 · 6 answers · asked by Anonymous in Geography

2007-12-04 01:03:09 · 4 answers · asked by Anonymous in Mathematics

With all the ideas being considered to remove CO2 from our atmosphere to slow global warming, how about not producing it in the first place. Make soft drink companies pull CO2 from the atmosphere for their products,talk about CO2 storage systems, how many soft drink containers are out there at any moment!

2007-12-04 01:02:37 · 1 answers · asked by thebax2006 7 in Other - Science

I have my own favorite... just want to see what you all think. :)

2007-12-04 01:01:16 · 5 answers · asked by Anonymous in Geography

2007-12-04 00:48:07 · 6 answers · asked by Anonymous in Weather

A 0.5kg stone on the end of a length of a string is whirled round in a horizontal circle, radius 2m on a level frictionless table. The stone moves at a constant speed of 7m/s.Calculate

(a) The stones acceleration, stating its direction,

(b) the tension in the string,

(c)the work done by the tension during ten revolutions, explaining your answer

I've attempted part a and b using a=v2/r and tension = mg, i dont know if im right in these 2 but i dont have any idea how to do (c).
Any help is appreciated.

2007-12-04 00:47:21 · 3 answers · asked by homosapien 3 in Physics

A plane is to fly due noth, the speed of the plane relative to air is 200 km/h and the wind is blowing from west to east at 90 km/h. (a) in which direction should the plane head? (b) How was does the plane travel relative to the ground?

2007-12-04 00:43:02 · 1 answers · asked by ♥ 6 in Physics

2007-12-04 00:39:05 · 7 answers · asked by Anonymous in Physics

2007-12-04 00:35:01 · 2 answers · asked by sss 1 in Chemistry

worked out please?

2007-12-04 00:33:14 · 3 answers · asked by AshconLivingston 2 in Mathematics

The HK Observatory says HK"s annual mean temperature is expected to rise by 3.5 degrees Celsius,to around 26.5 degrees,by the last decade of this century.What should the government and the public do to reduce the problem?

2007-12-04 00:26:00 · 2 answers · asked by cheuksiufai 2 in Weather

2007-12-04 00:20:02 · 9 answers · asked by mikey 3 in Other - Alternative

2007-12-04 00:19:45 · 11 answers · asked by andtheansweris? 2 in Astronomy & Space

Jarod is having a problem with rabbits getting into his vegetable garden, so he decides to fence it in. The length of the garden is 2 feet more than 3 times the width. He needs 36 feet of fencing to do the job. Find the length and width of the garden.

a. length: 11 feet; width: 3 feet
b. length: 17 feet; width: 5 feet
c. length: 14 feet; width: 4 feet
d. length: 1 / 2 and 27 feet; width: 1 / 2 and 8 feet

2007-12-04 00:17:32 · 2 answers · asked by . 1 in Mathematics

I wondered if some one can help me and show working out the calks to this question...

A contractor has to excavate for foundations in an area for which there are no plans of existing services. It is anticipated that he may cut across one or more of the service lines whilst excavating. The following probabilities have been calculated for each of the following services:

Water supply - 0.08
Gas - 0.05
Telephone Cable – 0.04
Drainage – 0.12
Electricity – 0.05

Calculate the probability of cutting across

a) at least one of the services
b) both water and drainage
c) electricity or telephone cable

 I have the answers but I don’t know how to get them no putting them on here so I can check your answers too.

Hope someone can help

Regards

J

2007-12-04 00:16:02 · 4 answers · asked by musicotherside 1 in Engineering

2007-12-04 00:15:41 · 3 answers · asked by solex 1 in Physics

On a buying trip in Los Angeles, Rosaria Perez ordered 120 pieces of jewelry: a number of bracelets at $4 each and a number of necklaces at $13 each. She wrote a check for $1110 to pay for the order. How many bracelets and how many necklaces did Rosaria purchase?

a. 50 bracelets and 70 necklaces
b. 45 bracelets and 75 necklaces
c. 55 bracelets and 65 necklaces
d. 60 bracelets and 60 necklaces

2007-12-04 00:13:57 · 7 answers · asked by . 1 in Mathematics

{8x - 5y = 8
{24x - 15 = 32

a. (8, 32)
b. (5 / 4, -2)
c. (3, 4)
d. no solution

2007-12-04 00:04:04 · 3 answers · asked by . 1 in Mathematics

i just have no clue how to do these types of problems so a little explanation would be very helpful. maybe a little step by step could help too. thx

2007-12-04 00:02:00 · 1 answers · asked by nickc1024 2 in Mathematics

2007-12-04 00:00:41 · 3 answers · asked by Holly S 1 in Geography