Science & Mathematics - 5 September 2007

Find the measurements of angles 2, 3, and 4 when the measurement of angle 1 is 90. then find it when angle 1 is 93.

2007-09-05 16:57:34 · 4 answers · asked by michelle w 1 in Mathematics

a man walking at an average speed of 4 mph alongside a railroad track. A frieght train, going in the same direction at an average speed of 30 mph, requires 5 seconds to pass the man. How long is the Freight train? give your answer in feet.
(the answer is 190.67 ft long)

2007-09-05 16:56:51 · 2 answers · asked by Richard C 1 in Mathematics

2007-09-05 16:54:19 · 4 answers · asked by Shiroi Nozomi 1 in Chemistry

The problem states that a semi circular arch over a street that has a radius of 14feet. A banner is attached to the arch at points A and B, such that AE=EB=5 feet. How many feet above the ground are these points of attachment for the banner?

2007-09-05 16:54:10 · 5 answers · asked by madeline 1 in Mathematics

What is caused of ferrite (%Fe) to occur in the weld seam?
thank for any help...

2007-09-05 16:50:14 · 2 answers · asked by BOY 1 in Engineering

how would i design a controlled experiment to see if ants are attracted to honey or butter?

2007-09-05 16:48:24 · 3 answers · asked by مدينا Medina ☪ 6 in Biology

Thanks

2007-09-05 16:47:50 · 8 answers · asked by Anonymous in Mathematics

My 6 year old is absolutely taken with the flow of blood through the body. She now asks if the food we're eating has cholesterol because she doesn't want to block her arteries. Tee Hee! I've taught her what I can remember from college anatomy, but now she wants to know about the path food takes and how it turns into waste. She also wants to know how our bodies fight off germs. I don't remember enough of all of that to feel comfortable teaching her. She also likes pictures (drawn or real) obviously. Any suggestions?

2007-09-05 16:47:19 · 2 answers · asked by Karen 2 in Medicine

Is it really ok that we hold ourselves so hight above animals? We used to think slavery was ok, but today most agree that it was a dark time in our society.

What about animals? We imprison them in zoos, we keep them in tiny cages, we breed them for our own purposes, we sell them.......Is it arrogant that we concider ourselves so far above these creatures who share our planet? Is it arrogant to assume these creatures were created for our entertainment/use?

Just some thoughts... Please, respect animals, just because they are unable to defend themselves, does not make excuse to abuse them.

2007-09-05 16:46:26 · 10 answers · asked by Royal 4 in Zoology

2007-09-05 16:45:16 · 5 answers · asked by irishphil66 1 in Medicine

the cells of some kinds of bacteria divide every 30 minutes.If you begin with a single cell,how many cells will there be after 1 hour?2 hour? 3 hour? everybody this is the question because the other one didnt fit

2007-09-05 16:45:15 · 7 answers · asked by trenton h 1 in Mathematics

Light travels in a vacuum at 3.00*10^8 m/. Determine the time in seconds..

Laser light is sent from Earth, reflects off a mirror on the Moon, and returns to Earth. The average Earth Moon distance is 3.84*10^5 km.

2007-09-05 16:45:12 · 1 answers · asked by lifehouse 1 in Physics

you buy a vcr for $149 and plan to rent movies each month. each rental costs $3.85. write an expression that vies the total amount uu spend during the first 12 months that u own the vcr, including the price of hte vcr. evaluate the expression if u rent six movies each month

2007-09-05 16:44:19 · 8 answers · asked by مدينا Medina ☪ 6 in Mathematics

4 married couples are arranged in a row,find the probability that no husband sits next to his wife.

2007-09-05 16:44:16 · 2 answers · asked by Express F 1 in Mathematics

to encapsulate us in a drop of primordial water, and slowly add ingredients to it in order to create life, such as carbon, nitrogen, hydrogen, oxygen,,,etc...If this is the case wonder what kind of grade this alien will get from this failure we call earth, ???

2007-09-05 16:43:54 · 10 answers · asked by Anonymous in Astronomy & Space

A pool in the shape of a circle measures 10 feet across. One cubic yard of concrete is to be used to create a circular boarder of uniform width around the pool. If the boarder is to have a depth of 3 inches, how wide will the boarder be? ( a cubic yard = 27 cubic feet) the answer is 2.71 ft wide...i jus need to know how to actually do the work..thanks

2007-09-05 16:42:53 · 6 answers · asked by Richard C 1 in Mathematics

2007-09-05 16:42:12 · 4 answers · asked by irishphil66 1 in Medicine

The mass and radius of each wheel are 5.50kg and 0.38 m, respectively. Each wheel starts from rest and turns through an angle of 12 rad in 5.80 s. One wheel has the shape of a hoop and the other the shape of a solid disk.
(a1) What is the algebraic expression for the net external torque Στ that acts on a wheel? Express your answer in terms of the moment of inertia I and the angular acceleration α.
(b1) What is the net external torque Στ that acts on the hoop?
(c1) What is the net external torque Στ that acts on the solid disk?

2007-09-05 16:41:21 · 1 answers · asked by Anonymous in Physics

would a medical technologist use outside information 2 help diagnose a patient??? (for example, would they use things like low blood pressure readings in their reports on a patient with anemia? or use EKGs/ECGs 2 help with a high cholesterol patient??? x-rays for melignant tumors?)
p.s. i dont mean the lab tech actually DOING them, i just mean that if they use them in the patient records or not.

2007-09-05 16:40:56 · 2 answers · asked by Anonymous in Medicine

You have a 200.0 mL graduated cylinder containing 56.9 mL of water. A piece of metal with a density of 9.30 g/cm3 weighing 190.90 g is placed in the cylinder. What is the reading on the cylinder after the metal has been added? Enter your answer with the correct number of significant figures.

2007-09-05 16:39:59 · 3 answers · asked by bloooper28 1 in Chemistry

Can you please show the steps and the answer? Thanks :]

2007-09-05 16:38:06 · 5 answers · asked by A-Renee 1 in Mathematics

atom is becuase the total negative charge of all its orbitals is greater than the total charge of almost all other elements. ((While reactions are either a matter of gaining electrons or losing electrons, oxygen's strong charge causes it to accept or share electrons and therefore giving it a stong affinity for covalent bonds.))

Thanks,

Lisa

2007-09-05 16:38:04 · 2 answers · asked by Lisa 1 in Chemistry

whats is the difference between :

- gas and liquid
- liquid and solid
- evaporation and condensation

2007-09-05 16:37:47 · 1 answers · asked by Anonymous in Physics

2007-09-05 16:37:22 · 3 answers · asked by Claudia 1 in Geography

The length of each rod is 0.55 m, and the angular speed is 3.60 rad/s. The mass of the particle attached to the massless rod A is 0.68 kg. The mass of the uniform rod B is also 0.68 kg.
(a1) What is the algebraic expression for the rotational kinetic energy KER? Express your answer in terms of the moment of inertia I and the angular speed ω.
(b1) What is the rotational kinetic energy KER for rod A with its attached particle?
(c1) What is the rotational kinetic energy KER for rod B?

2007-09-05 16:36:46 · 1 answers · asked by Anonymous in Physics

Okay, hi! First off, how do you find a horizontal asymptote? I know that for a vertical asymptote, you just find the value that makes the denominator equal zero, right? Well what about the horizontal asymptote?

And I also have a question about the reduction formula with trigonometric equations.... I'm using the formula y = Asinx + Bcosx = √(a²+b²)sin(x + C), and everything comes out okay until I get to problems like these:

y = -3sinx - 5cosX

I got √(34)sin(x+2.1), but my book says that the answer is √(34)sin(x+4.2).

Similarly, for y = -√2 sinx - √7 cosx, I got 3sin (x + 2.1) and the book says 3sin (x + 4.2).

What am I doing wrong?

Thank you so much! I'll pick a best answer as soon as it lets me (I think 4 hours after I post the question)! Okay thanks!

2007-09-05 16:34:45 · 1 answers · asked by Anonymous in Mathematics

I was wondering since ketone is a carbon double bonded to an oxygen and 2 R-groups.... When one of the R-group appear to be hydrogen, the whole thing becomes aldehyde....so can you say aldehyde is also a ketone?

2007-09-05 16:32:52 · 5 answers · asked by edbiology 1 in Chemistry

How would you get this formula? (Please include a full description of how you got the answer)

1. 3+(10-3squared) divided by 4

2007-09-05 16:32:28 · 8 answers · asked by xoPink_Lovexo 1 in Mathematics

Find the discriminant and state the nature the roots: 3x^2-5x+3=0

First person to show the work and answer i'll mark best answer

thanks

2007-09-05 16:31:48 · 6 answers · asked by Dean 1 in Mathematics

A balloon with a radius of r inches has a volume V(r )= 4/3πr^3. Find a function that represents the amount of air required to inflate the balloon from a radius of r to a radius of r+1 inches.

2007-09-05 16:30:27 · 5 answers · asked by smarin1987 2 in Mathematics