Science & Mathematics - 6 October 2007

i was on wikipedia looking at my zodiac sign which is a sagittarius and it says im compatible with a scorpio but on the scorpio page it says opposite compatible. so what does opposite compatible mean?

2007-10-06 12:50:40 · 5 answers · asked by Sagittarius4lyfe 2 in Astronomy & Space

hi! i need help learning about binary numbers. when I was younger, I was showed how to get binary numbers in the form of a game. I really understood it, but now i totally forgot. I need to know how to change a whole number into a binary number, and how to change it back. I understand the concept, and I can add, but i have no idea how to subtract and multiply, and divide. please help!

2007-10-06 12:48:34 · 3 answers · asked by Lisa L 3 in Mathematics

2007-10-06 12:48:15 · 3 answers · asked by lakisha r 1 in Medicine

2007-10-06 12:47:37 · 9 answers · asked by Bj 1 in Weather

Does anybody know ?

2007-10-06 12:42:34 · 3 answers · asked by XloveX 1 in Mathematics

Determine if there is something wrong in these numbers; explain your answer?

a. 1110110 ----- to base 2 ( binary )

b. 185 ------------ to base 8 (octate )

c. FF ------------- to base 16 ( hexadecimal )


Is there something wrong with these numbers ? i dont get it :(

2007-10-06 12:40:59 · 1 answers · asked by XloveX 1 in Mathematics

How can $70,000 be invested, part at 4% annual simple interest and the remainder at 10% annual simple interest, so that the interest earned by the two accounts is equal at the end of the year?

a. $50,000 invested at 4%; $20,000 invested at 10%
b. $40,000 invested at 4%; $30,000 invested at 10%
c. $30,000 invested at 4%; $40,000 invested at 10%
d. $20,000 invested at 4%; $50,000 invested at 10%

2007-10-06 12:36:49 · 6 answers · asked by . 1 in Mathematics

2007-10-06 12:32:40 · 8 answers · asked by . 1 in Mathematics

i just took a picture at my work yesterday and a bunch of stuff came out...like faces and its really creepy...where can i go to a website and post my pic so that someone can look at it?

2007-10-06 12:30:17 · 12 answers · asked by crazygirlx02 2 in Paranormal Phenomena

Okay, well, I have a couple questions in one, so please answer and I'll be VERY happy! thank you

1) Is an equation with cubed in it at anytime a hyperbola? I mean, will you get a hyperbola with a function with 'cubed' in it?

2) How do solve an equation with cubed in it? For example, 2^3 + 4 = 12. i know its easy, but how do u properly solve it?

3) x^2/a^2 - y^2/b^2...the hyperbola function..HOW DO YOU DO IT!!!! lol

4) How do you get a parabola that is facing left or right, not up or down?

2007-10-06 12:26:31 · 2 answers · asked by AHauntingNearU 2 in Mathematics

2007-10-06 12:26:27 · 1 answers · asked by Boris G 1 in Physics

You measure 5 ml of a solution and determine its mass on a balance. You repeat this procedure four times. You try the experiment again. This time you have four new values for mass, as shown below. What is the statement that best describes the measurements?

Experiment 1: 5.7g, 5.8g, 5.7g, 5.8g
Experiment 2: 4.9g, 5.0g, 4.8g, 5.3g

a) the measurements in both experiements are accurate and precise
b) the measurements in both experiements are not accurate but are precise
c) the measurements in experiment 1 are not accurate but are precise; the measurements in experiment 2 are accurate but not precise
d) the measurements in experiement 1 are accurate and not precise; the measurements in experiment 2 are not accurate and not precise

Can I have an explanation also?

2007-10-06 12:26:06 · 1 answers · asked by V 1 in Biology

also, Li+

Is this an ion; and why or why not?

2007-10-06 12:22:41 · 2 answers · asked by RogerDodger 1 in Chemistry

Why it is necessary to reverse the inequality symbol when multiplying both sides of an inequality by a negative number?

Can you give an example!!!

2007-10-06 12:21:12 · 5 answers · asked by Anonymous in Mathematics

What percent of a yard is a foot?

Explain how you got your answer.

2007-10-06 12:00:55 · 12 answers · asked by Revinder 2 in Mathematics

2007-10-06 11:52:50 · 7 answers · asked by TOGA TOGA 3 in Astronomy & Space

I'm really confused, can someone help me please with this question, or explain how to do it

Pluto the dog jumps between 2 buildings
1) in the first stunt, the buildings are 40m above ground and the gap between them is 6m. If the dog takes off at 8m/s what range of angles to the horizontal must he take off at in order to complete the jump?

2)in the 2nd stunt the gap between the buildings is 8m, but a takeoff ramp is provided. show my differention that if the dogs take off speed is V0, the maximum range occurs for takeoff angles of 45degrees.

3)find the minumum takeoff speed at which the dog can make the 8m jump.

Please help me!

2007-10-06 11:52:02 · 1 answers · asked by Hayley* 3 in Physics

2007-10-06 11:51:25 · 3 answers · asked by Anonymous in Astronomy & Space

2007-10-06 11:42:37 · 6 answers · asked by New Mommy 1 in Astronomy & Space

2007-10-06 11:36:13 · 2 answers · asked by New Mommy 1 in Astronomy & Space

2007-10-06 11:35:58 · 2 answers · asked by Anonymous in Astronomy & Space

Whats the day length in the north pole?

2007-10-06 11:34:42 · 2 answers · asked by Tami A 1 in Astronomy & Space

2007-10-06 11:30:24 · 8 answers · asked by madalena d 1 in Mathematics

What about something like a human, but with 10 brains? The brains would all share the same nervous system, so wouldn't it be smarter than a one brained human? Or just have more than one frontal lobe?

I've been thinking about it since I read an article about how science has created a new bacteria.
http://www.foxnews.com/story/0,2933,299857,00.html

2007-10-06 11:25:48 · 5 answers · asked by kimmyisahotbabe 5 in Other - Science

I noticed that there are two equations for speed and three for acceleration:

Speed:

1. Speed= distance/time

2.Average Speed= distance covered/time interval

How do I know which ones to use when solving a speed problem?

Acceleration:

1. A=change in velocity/time interval

2. A=change in speed/time interval

3. A=net force/mass

When solving an acceleration problem, how would I know which equation to use?

Please keep the explanations simple and add examples in necessary.

Thank you!!

2007-10-06 11:24:47 · 0 answers · asked by b 5 in Physics

Okay i've tried already 4 times.. And i have one more try ( since i do my university assignments on the computer) I really don't understand i've done everything that book told me, but im missing something.. Can someone please show me step by step You don't need to give me the anwser... you can place different numbers if you like. Please help thanks :(

Combustion of C12H22O11(s) (sucrose or "table sugar") produces CO2(g) and H2O(l).
When 2.37 g of sucrose is combusted in a constant volume (bomb) calorimeter, 39.1 kJ of heat is liberated.

Calculate deltaE for the combustion of 7.50g of sucrose.

2007-10-06 11:24:25 · 2 answers · asked by Anonymous in Chemistry

An element (call it X) in Group 1A of the periodic table forms a compound with an element (call it Y) of Group V1A. What would be the most likely formula and nature of the compound?

1)X2Y; covalent
2)XY6; covalent
3)X6Y; ionic
4)XY2; ionic
5)XY6; ionic
6)X2Y; ionic
7)XY2; covalent

2007-10-06 11:19:18 · 2 answers · asked by Alexa S 1 in Chemistry

2007-10-06 11:15:41 · 5 answers · asked by Anonymous in Biology

The problem is with separating the wavelengths to each detector from a single lens. Is there a coating I could use to reflect one of the wavlengths while the other passes through? Would it be best to split the beam first then use filters before each detector to single out the IR/visible?
My goal is to image both a visible AND thermal scene with one objective. I can handle everything from the detector to the display but I need a bit of help with the optics. Of course I'm looking for the simplist and cheapest method (IR and cheap don't really go together), but any REAL solutions would be great. Thanks

2007-10-06 11:14:40 · 3 answers · asked by Jeffy 1 in Engineering

A car with a mass of 1200 kg is moving around a curve with a radius of 40 m at a constant speed of 20 m/n (about 45 MPH).

a. What is the centripetal acceleration of the car?
b. What is the magnitude of the force required to produce this centripetal acceleration?

2007-10-06 11:14:18 · 1 answers · asked by grtfulhdgirl 1 in Physics