Science & Mathematics - 10 October 2007

for a project thx

2007-10-10 15:31:54 · 1 answers · asked by Anonymous in Zoology

Please answer this question and help me step by step to understand what to do. im having a hard time in my physics class i need some help, but once someone explains it to me, i can do the rest. please help.

A pair of glasses is dropped from the top of a 32.0m high stadium. A pen is dropped 2.00s later. How high above the ground is the pen when the glasses hit the ground? (Disregard air resistance. A= -g= -9.81 m/s^2)

Please help with anything you can. thanks :)

2007-10-10 15:29:54 · 2 answers · asked by Anonymous in Engineering

A hang glider who started at 7:55 am has traveled at a constant speed (as shown on the table)

Time:8:00am
Distance Traveled: 2miles

Time:8:30am
Distance Traveled: 14miles

if the line that represents the hang gliders distance traveled is graphed, which is a true interpretation of the slope?

a) the glider is traveling 24 miles per hour
b)16 miles per hour
c)12 miles per minute
d)7 miles per minute.

Please tell me what formula or how ever you solved this. lol im just confused.

Thank you!!!!

2007-10-10 15:29:14 · 4 answers · asked by meagan 2 in Mathematics

2007-10-10 15:26:31 · 2 answers · asked by Anonymous in Mathematics

2007-10-10 15:25:36 · 4 answers · asked by Anonymous in Astronomy & Space

please answer this problem and help me understand what to do:

A skater glides off a frozen pond onto a patch of ground at a speed of 1.8 m/s. Here the skater is slowed at a constant rate of 3.00 m/s^2. How fast is the skater moving when she slid 0.37m across the dirt patch?

i really need some help underdtanding these kind of problems. please help, thanks :)

2007-10-10 15:25:00 · 1 answers · asked by Anonymous in Physics

i need to find the derivative of
e^ktan(square-root of 3)

i got a long and complicated answer, which i thought was right due to using the chain rule for derivatives, but it was apparently wrong, could someone help me please? thanks

2007-10-10 15:24:20 · 3 answers · asked by fr3shfr0st 1 in Mathematics

1)6x+7=8x-13
2)3n/5-2/5=7/10
3)13.7b-6.5=-2.3b+8.3
4)3/2y-y=4+.5y
5)-7(x-3)=-4
6)28-2.2y=11.6y+262.6
7)7-3x=x-4(2+x)
8)6(y+2)-4=-10
9)-8(4+9x)=7(-2-11x)
10)4(2a-8)=1/7(49a+70)
11)diophantus passed one sixth of his life in childhood, one twelth in youth, and one seventh more as a bachelor. five years after his marriage, there was born a son who died four years before his father, at half his father's (final) age. how old was diophantus when he died.

any answers are helpful, i'm not sure if i've been doing it right.(some are false)

2007-10-10 15:23:55 · 5 answers · asked by Anonymous in Mathematics

mike has a total of $2000 on deposit with two savings institutions . One pays interest at the rate of 6%/year and the other pays interest at the rate of 8%/year. if mike earned a total of $144 in interest during a single year, how much does he have on deposit in each institution?

2007-10-10 15:21:59 · 4 answers · asked by jewel7962002 1 in Mathematics

I was wondering if evaporating or condensing a liquid is considered a chemical reaction/ chemical method?

2007-10-10 15:20:31 · 4 answers · asked by lisazhang112004 1 in Chemistry

2007-10-10 15:16:28 · 5 answers · asked by Luakjdk K 1 in Astronomy & Space

A Octopus that lives in the sea.

2007-10-10 15:12:31 · 5 answers · asked by judy b 1 in Other - Science

WHAT IS THE FORMULA FOR (A+B) CUBED AND ANSWER THIS QUESTION. (4M to the fifth N) cubed

2007-10-10 15:09:34 · 3 answers · asked by ZJ VANDALS 1 in Mathematics

hey does anyone know how Professor Douglas McGregor
at MIT (USA) died??

2007-10-10 15:07:40 · 1 answers · asked by tim's gal 2 in Geography

Write the complete and net ionic equations. Indicate the state of the reaction products.

1. Ag2SO4 (aq) + NaNO3

2. CaBr2 (aq) + Na2SO4 (aq)

3. Pb(IO3)2 (aq) + NaOH (aq)

4. K2SO4 (aq) + BaCl2 (aq)

2007-10-10 15:06:30 · 1 answers · asked by Lionheart12 5 in Chemistry

2007-10-10 15:05:20 · 2 answers · asked by Deenie 6 in Paranormal Phenomena

I am a draftsman that just started working for a structural engineering firm and I am way behind on the learning curve. I am trying to find a book that is an overview, to at least aquaint me with the basic terminology and principles. Thanks in advance for your help.

2007-10-10 15:03:49 · 3 answers · asked by apple3902 2 in Engineering

It has been suggested that rotating cylinders about 12 mi long and 6.3 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?
? rad/s

2007-10-10 15:03:03 · 1 answers · asked by Anonymous in Physics

Find the centripetal accelerations at each of the following points due to the rotation of Earth about its axis.
(a) a point on the Equator of Earth
? m/s2
(b) the North Pole
? m/s2

2007-10-10 15:02:15 · 3 answers · asked by Anonymous in Physics

iodine-131 is used to study the thyroid. A sample contains 20mg. 2 days later 16.85 mg are present. what is the half life of iodine-131, to the nerest thenth?

2007-10-10 15:02:14 · 1 answers · asked by Anonymous in Chemistry

PS.I'm new on here...so please bear with me.

2007-10-10 15:02:07 · 5 answers · asked by Deenie 6 in Paranormal Phenomena

Is (6,-40) a solution of y=-7x+2?
yes or no?

is (3,-19) a solution of y=-7x+2?
yes or no?

2007-10-10 15:00:27 · 11 answers · asked by SOSme 1 in Mathematics

the problem is........polycarbonate plastic ha s a density of 1.2 grams/centimeters cubed. a photo frame is construsted from two .30cm sheets of polycarbonate. each sheet measures 28 cm by 22 cm. what is the mass of the photo frame?

for mulitplying significant figures i know you have to round the answer so it has no more significant figures than are in the measurement with the fewest significant figures. i also know that the answer to the problem is supposedly 440 grams but i do not understand how to get it.

2007-10-10 14:58:56 · 2 answers · asked by highschoolmusicalfan 3 in Chemistry

Could this jump start the development of life on the planet?

2007-10-10 14:58:15 · 11 answers · asked by Anonymous in Astronomy & Space

i simply cannot seem to solve this problem. It's a take home test and every answer i come up with isn't an option. the possible answers given are:

A) 0, 1
B) 1, 4
C) 1, 38.672
D) 1, 6.219

2007-10-10 14:53:36 · 6 answers · asked by yellowx_xeyes 1 in Mathematics

2007-10-10 14:53:34 · 7 answers · asked by Deenie 6 in Paranormal Phenomena

The future of the Hubble Space Telescope is uncertain. While it is still operating, repair missions to keep it running are dependent on shuttle flights. Do you think the cost and risk of servicing HST is worth the benefits to the astronomical community?

2007-10-10 14:52:38 · 4 answers · asked by higherlovetx 5 in Astronomy & Space

2007-10-10 14:52:10 · 8 answers · asked by Deenie 6 in Paranormal Phenomena

2007-10-10 14:51:27 · 12 answers · asked by Deenie 6 in Paranormal Phenomena

2007-10-10 14:51:12 · 2 answers · asked by Luakjdk K 1 in Astronomy & Space