Science & Mathematics - 30 December 2007

A technique called egg fusion involoves the union of one haploid egg cell with another. The zygote contains the full 2n chromosome number and is always a female.
What are the implications for society if this technique were to be used for humans?

2007-12-30 13:34:02 · 1 answers · asked by Anonymous in Biology

Which is the formula for the compound that forms when magnesium bonds with phosphorus?

a- Mg3P2
b- MgP2
c- Mg2P3
d- Mg2P

thanks in advance =)

2007-12-30 13:29:40 · 1 answers · asked by wat_up_dude 1 in Chemistry

When the electrons of an excited atom return to a lower energy state, the energy emitted can result in the production of

a- protons
b- spectra
c- isotopes
d- alpha particles

thanks in advance =)

2007-12-30 13:24:36 · 4 answers · asked by wat_up_dude 1 in Chemistry

Compared to a sodium atom in the ground state, a sodium atom in the excited state must have

a- an electron with greater energy
b- a greater number of electrons
c- an electron with less energy
d- a smaller number of electrons

thanks in advance =)

2007-12-30 13:21:50 · 4 answers · asked by wat_up_dude 1 in Chemistry

An algebra class of 21 students must send 5 students to meet with the principal. How many different groups of students could be formed from this class?

Ahh I totally forgot how to do this. Can someone explain?

2007-12-30 13:20:43 · 9 answers · asked by Anonymous in Mathematics

The radius of a sphere is given by the formula r= (0.75v)^1/3/ rr. where v is its volume. Find the radius of a spherical tank that has a volume of 32rr/3 cubic meters.

2007-12-30 13:18:24 · 5 answers · asked by Anonymous in Mathematics

2007-12-30 13:17:36 · 7 answers · asked by Bishwanath S 1 in Astronomy & Space

this is something thats been bothering me so i want a good answer

2007-12-30 13:16:22 · 16 answers · asked by Robert V 1 in Zoology

1. Simplify the radical: square root 9/ 144

2. Use the product and quotient rules to smplify: square root 27/16

2007-12-30 13:14:43 · 4 answers · asked by Anonymous in Mathematics

I have a BMW 316i (Shape: E30) and I need to know what resistance I'll need from the battery to a strip of 10mm superbright LEDs.

Here's a link to the page I'll be buying from, just need to know what resistor I'll need for a circuit of maybe 10 - 15 of these LEDs.

Not sure what the difference is of the 2 LEDs on that page but the bottom one looks like it might be brighter so could anyone tell me what resistor I'll need for that one?

2007-12-30 13:14:41 · 6 answers · asked by Anonymous in Engineering

Compared to the entire atom, the nucleus of the atom is

a- larger and contains most of the atom's mass
b- smaller and contains little of the atom's mass
c- smaller and contains most of the atom's mass
d- larger and contains little of the atom's mass

thanks in advance =)

2007-12-30 13:13:41 · 1 answers · asked by wat_up_dude 1 in Chemistry

What's 92 minutes added to 1:55pm?
My brother and i am having a debate about this, i know it sounds stupid but i just know im right :)

2007-12-30 13:12:49 · 5 answers · asked by Anonymous in Mathematics

1. Find each root: square root m^6

2. use the product rule for radicals to simplify the expression: 3 square root 5b^9

2007-12-30 13:10:17 · 2 answers · asked by Lillian M 1 in Mathematics

If you take a laser pointer and put a magnifying glass in front of the laser, is it possible to amplify the laser to the point in which it can burn something?

2007-12-30 13:10:12 · 4 answers · asked by Ethereal 5 in Physics

A student determining the percent by mass of water in a hydrated crystal obtained the following data.

Mass of crystal before heating....5.0 g
Mass of crystal after 1st heating..4.0 g
Mass of crystal after 2nd heating..4.0 g

What is the percent by mass of water in the hydrate?

a- 0.80%
b- 0.20%
c- 20.%
d- 80.%

thanks in advance =)

2007-12-30 13:06:34 · 3 answers · asked by person 3 in Chemistry

what will be the answer in:
1.) 12 (sqrt of 2) divided by 2 (sqrt of 27)
2.) (3rd root of 5) divided by (sqrt of 5)

2007-12-30 13:06:09 · 4 answers · asked by leSsien 1 in Mathematics

instead of jus saying yes or no it would be helpful if you explained

2007-12-30 13:04:12 · 5 answers · asked by Anonymous in Other - Science

What is the total number of moles of oxygen atoms in 1 mole of ozone? (Molecular mass = 48)

a- 1
b- 2
c- 3
d- 4

thanks in advance =)

2007-12-30 13:01:47 · 4 answers · asked by person 3 in Chemistry

when i look closely at my hand, I see very small dust particles being drawn to it, is this gravity from my hand? when you stand next to a large building or cliff you sort of feel it, is it because those things have gravity?

2007-12-30 13:00:49 · 12 answers · asked by Anonymous in Physics

If 4(x+y)(x-y)=40 and x-y=20, what is the value of x+y?

Please explain how to do this. thanks

2007-12-30 13:00:43 · 3 answers · asked by J 2 in Mathematics

What is the molarity of a nitritic acid solution, HNO3, if 20.0 mL of the solution is needed to exactly neutralize 10.0 mL of a 1.67 M NaOH solution?

a- 3.34 M
b- 1.67 M
c- 0.334 M
d- 0.835 M

thanks in advance =)

2007-12-30 12:59:15 · 3 answers · asked by person 3 in Chemistry

If humans were to design a way to implode a giant mass, would that cause a black hole?

2007-12-30 12:57:36 · 4 answers · asked by Gary88 1 in Physics

I found a bottle of Vitamin C perscribed to a friend of mine for 500mg
What does Vitamin C do?
Can you overdose on Vitamin C?
What are the side effects of Vitamin C?

thank you :)

2007-12-30 12:57:19 · 7 answers · asked by Anonymous in Medicine

2007-12-30 12:56:07 · 4 answers · asked by Z 1 in Botany

When hydrochloric acid is neutralized by sodium hydroxide, the salt formed is sodium

a- hydrochlorate
b- chloride
c- chlorate
d- perchloride

thanks in advance =)

2007-12-30 12:55:16 · 2 answers · asked by person 3 in Chemistry

What is the name of the salt produced by the reaction of calcium hydroxide with sulfuric acid?

a- calcium sulfite
c- calcium sulfate
c- calcium sulfide
d- calcium thiosulfate

thanks in advance =)

2007-12-30 12:53:33 · 4 answers · asked by person 3 in Chemistry

According to Reference Table V, which of the following is the strongest Bronsted-Lowry acid?

a- HS-
b- H2S
c- HNO2
D- HNO3

thanks in advance =)

2007-12-30 12:51:18 · 2 answers · asked by person 3 in Chemistry

Which of the following is the strongest base (proton acceptor)?

a- Cl-
b- F-
c- I-
d- Br-

thanks in advance =)

2007-12-30 12:49:37 · 2 answers · asked by person 3 in Chemistry

How many neutrons and protons (nucleons) does an atom with the symbol (33 on top, with a 16 underneath the next to S) have?
a. 33
b. 16
c. 49
d. 17
e. None of the above.

2007-12-30 12:49:17 · 4 answers · asked by Charlie W 1 in Mathematics

2007-12-30 12:44:13 · 7 answers · asked by Ptericytol 1 in Astronomy & Space