Science & Mathematics - 2 October 2007

a) what will be the phenotypic ratio among the offspring for this trait?
b) what will be the genotypic ratio among the offspring for this trait?

2007-10-02 09:00:29 · 1 answers · asked by ry ry 3 in Biology

i just started to learn drafiting for architecture in autocad and on our computers at school, when you draw a line you can drag it in the direction you want it to go and then type in how many feet you want it to go (ex: 3'). when i try to draw a line on the same version of autocad at home (2008), when i type in 3' a red box shows up around it and i doesn't work! under "drawing units" i have all the same settings: architecture, inches, decimel degrees, etc. what's going on??

2007-10-02 08:55:26 · 5 answers · asked by svargabell 2 in Engineering

what is the physical meaning of poles and zeroes 4 characteristic equationof transfer function?what the change happens after a change in poles or zeroes?

2007-10-02 08:54:00 · 1 answers · asked by RAMY DIAB 1 in Engineering

When a solution of nitric acid and sodium hydroxide are mixed, what precipitate if any is formed?

a)No precipitate. This is a neutralization reaction. Water is formed and nitrate and sodium ions move throughout the solution.

b)Sodium nitrate, NaNO3 (s) and water are formed

c)Sodium nitrate, NaNO3 (s)

d)No reaction

When a solution of sodium sulfide and iron (III) chloride are mixed, what precipitate if any is formed?

A)No precipitate
B)Iron (III) sulfide, Fe2S3 (s)
C)Iron (III) sulfide, Fe2S3 (s) and Sodium chloride, NaCl (s)
D)Sodium chloride, NaCl (s)

2007-10-02 08:48:03 · 2 answers · asked by Anonymous in Chemistry

This is a cell analogy project comparing an animal cell to the human body

2007-10-02 08:45:36 · 4 answers · asked by Anonymous in Biology

helppppppppppp biology is crazyyy

2007-10-02 08:45:20 · 2 answers · asked by Christina S 1 in Biology

2007-10-02 08:42:55 · 3 answers · asked by chelsea c 1 in Earth Sciences & Geology

Two packing crates of masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a frictionless pulley as in Figure P4.26. The 5.00 kg crate lies on a smooth incline of angle 41.0°. Find the acceleration of the 5.00 kg crate.

could you detail how to do the problem....i don' want just the answer....thank you!!!!

2007-10-02 08:42:24 · 1 answers · asked by lttlstar7 1 in Physics

i can easily integrate to find volumes around the x-axis and other x lines but when it cimes to the y-axis and there is more than one line and i must find the volume betwwen when rotated i get very confused!
for example can someone guide me through this slowly- you will be greatly appreciated as i am taking as level maths in year 9 and i need all the help i can get thanx:

find the volume generated when the region bounded by them curves y=2x(squared) and y= 3-(x squared) is rotated 180 degrees about the y -axis

sorry if this is not clear

thanx connor!

2007-10-02 08:42:13 · 2 answers · asked by Connor G 1 in Mathematics

2007-10-02 08:39:27 · 3 answers · asked by zebbie g 2 in Zoology

2007-10-02 08:39:00 · 12 answers · asked by Anonymous in Mathematics

is that computer graphics or is the moon really big over the horizon (out west somewhere - desert?)

2007-10-02 08:31:27 · 9 answers · asked by just_a_hick 4 in Astronomy & Space

What origional and new invention can you come up with? Thanks.

2007-10-02 08:29:28 · 13 answers · asked by Anonymous in Other - Alternative

Thank you!

2007-10-02 08:28:51 · 6 answers · asked by Anonymous in Mathematics

2007-10-02 08:28:33 · 3 answers · asked by Marley W 1 in Other - Science

2007-10-02 08:27:59 · 5 answers · asked by Anonymous in Earth Sciences & Geology

give questions by 3rd oct 07.. 11:00 am

2007-10-02 08:27:36 · 4 answers · asked by lakshay 1 in Astronomy & Space

the curve g(t)=(-1+3t,2-3t) is a tangent of h(t). Find where h(t) and G(t) intersect. i.e. find the points such that g(t1)=h(t2) for some t1,t2, in the reals.

i've shown its a regular parametrized curve. i've tried finding the intersecting point by -1+3t=t^3 and 2-3t=t^2-t
but i'm not really gettin gud answers so im thinkn if im doin it wrong, not quite sure wat the question means by t1 and t2. ???

2007-10-02 08:26:47 · 1 answers · asked by lookincool87 1 in Mathematics

2007-10-02 08:25:46 · 4 answers · asked by TicToc.... 7 in Astronomy & Space

I've just started searching for an 8" conflat gate valve for a vacuum deposition chamber (PVD sputtering with Ar process gas). I've realised that there are now Aluminum gate valves as well as Stainless valves that I'm used to. Can someone tell me which applications require which valve or what the consierations for use of either would be.
Many Thanks,
Steve

2007-10-02 08:24:08 · 1 answers · asked by Taoman 2 in Physics

is it possible to make any king of virus?
could we make a virus that would deliver DNA coding for small interfering RNA sequences that would disrupt the production of melanin synthesis enzyme or enzymes? how?

thank you,

ed

2007-10-02 08:23:57 · 4 answers · asked by Anonymous in Botany

What material forms the bulk of Mars' seasonal polar caps (the ones that grow in winter and dissipate in summer)?

2007-10-02 08:23:01 · 3 answers · asked by helloagain1968 2 in Astronomy & Space

Here are my steps:

dx = e^t + e^-t
dy = -2

then

L = ∫ √ [ (e^t + e^-t)² - (-2)² ] dt

= ∫ √ [ (e^2t) +( 2*e^t *e^-t) + (e^-2t) - 4 ] dt

2*e^t *e^-t = 2

so

L = ∫ √ [ (e^2t) - 2+ (e^-2t) ] dt

Which is the same as

L = ∫ √ [ (e^2t) - (2*e^t *e^-t)+ (e^-2t) ] dt

This is a perfect square

L = ∫ √ [ (e^2t ) - (e^-2t) ]² dt

L = ∫ (e^2t ) - (e^-2t)

= (1/2)e^2t + (1/2)e^-2t

The integral is from 0 to 3

the answer is (1/2) (e^6 + e^-6)

Is this right? I don't want the answer in decimals. To keep it in this format is okay.

2007-10-02 08:21:06 · 3 answers · asked by ? 3 in Mathematics

I've heard this saying several times.

2007-10-02 08:20:15 · 12 answers · asked by trer 3 in Zoology

Three merchants have invested their money in a partnership, whom to make the problem clearer I will mention by name. The first was called Piero, the second, Polo and the third Zuanne. Piero put in 112 ducats, Pollo 200 ducats, and Zuanne 142 ducats. At the end of a period of time they found that they had gained 463 ducats. How much does each man receive so that no one shall be cheated? You cannot Split a ducat...


Does ANYONE have ANY idea how to solve this???

2007-10-02 08:19:32 · 3 answers · asked by heythere 2 in Mathematics

2007-10-02 08:18:10 · 3 answers · asked by JAMES 4 in Physics

Approx. how often does this happen?

2007-10-02 08:16:56 · 12 answers · asked by chicanagrl 1 in Astronomy & Space

I need some Dilithium crystals for my Warp drive and me old mate Scotty isn't around, so can you help?

2007-10-02 08:15:14 · 16 answers · asked by Anonymous in Astronomy & Space

For science I'm supposed to drop an egg out of a 9.8 meter high window. What can I put the egg in to protect it from cracking?

2007-10-02 08:14:14 · 8 answers · asked by mariah L 1 in Engineering

12. Which of the following formulas is incorrect?
A. Al2(SO4)3
*B. AlOH3
C. Ca(OH)2
D. (NH4)2S

13. Which of the following formulas is incorrect?
*A. Fe3Cl
B. N2O3
C. Br2
D. H2CO3

14. Which of the following is the name for this compound: Ca(OH)2
A. carbon oxygen hydrogen
B. carbon oxide
C. calcium hydrogen oxide
*D. calcium hydroxide

15. A colorless, odorless gas combines with a magnetic, metallic element. What can you predict about the product?
A. It will also be magnetic
B. A gas and a solid produce a liquid
C. The compound will be shiny and odorless
*D. It will likely have different properties, but they can't be predicted without more information

16. An atom of magnesium has two valence electrons. It will most likely react with one atom of __, which contains __ valence electrons.
A. carbon, 4
B. nitrogen, 5
*C. oxygen, 6
D. chlorine, 7

17. Nitrogen atoms each have five valence electrons. How many pairs of electrons must be shared in a molecule of N2?
A. 1
B. 3
*C. 4
D. 6

2007-10-02 08:12:27 · 2 answers · asked by Anonymous in Chemistry