Science & Mathematics - 27 November 2007

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2007-11-27 14:06:44 · 26 answers · asked by Anonymous in Mathematics

A plane drops a hamper of medical supplies from a height of 4610 m during a practice run over the ocean. The plane's horizontal velocity was 117 m/s at the instant the hamper was dropped.

The acceleration of gravity is 9.8 m/s^2. What is the magnitude of the overall velocity of the hamper at the instant it strikes the surface of the ocean? Answer in units of m/s.

2007-11-27 14:05:35 · 1 answers · asked by Anonymous in Physics

2007-11-27 14:05:21 · 4 answers · asked by Anonymous in Mathematics

please add the products and balance it

2007-11-27 14:04:18 · 2 answers · asked by babe g 2 in Chemistry

Which female sex hormone is inhibitted during most of the ovarian cycle by estrogen, but is stimulated by estrogen to peak concentrations on days 12-14 and is most responsible for triggering rupture of the ovarian follicle and ovulation?

1) Gonadotropin releasing hormone
2) Follicle stimulating hormone
3) Luteneizing hormone
4) Progesterone
5) Human Chorionic Gonadotropin

2007-11-27 14:04:17 · 12 answers · asked by Anonymous in Biology

2007-11-27 14:02:06 · 8 answers · asked by morgan2174 1 in Astronomy & Space

please show work and explane

2007-11-27 14:01:33 · 4 answers · asked by michael s 1 in Mathematics

ahh, i really need an answer for my study guide! i dont wanna fail. lol, you know how it is when you dont know the answer. you freak out lol. so i'd really appreciate it if you'd help. thanks!

2007-11-27 14:01:30 · 1 answers · asked by Anonymous in Biology

2007-11-27 14:00:51 · 3 answers · asked by Devan S 1 in Weather

There are 100 points like (x1,y1)...(x2,y2). I need to find an arbitrary point (a,b) where the distance from (a,b) to all 100 points is minimum.

2007-11-27 14:00:06 · 1 answers · asked by kvr 1 in Mathematics

Calculate the integral [ (x^3 + 1) / x^5 ] dx.

Explain your work. Thanks! :)

2007-11-27 14:00:02 · 2 answers · asked by Anonymous in Mathematics

two electronics technicians are discussing conductors and insulators. technician A says that conductors have more free electrons than electrons than insulators. technician B says that insulators have lower resistance than conductors. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B is correct
d. neither of the two technicians is correct

2007-11-27 13:59:46 · 2 answers · asked by hannah.anonymous 1 in Engineering

What is a can crusher???
what is a can crusher?why do we use it? does it decrease friction? Is it easier to work with?if it is why????

please give a brief answer.and how do we give more than 20 points for the best answer like if i want to give a 20 points how do you do it?

Thanks alot!!!!

2007-11-27 13:58:27 · 2 answers · asked by Kimberly 2 in Engineering

2KClO3 ---> 2KCl + 3O2

How much O2 will be generated in moles beginning with 0.107mol KClO3

2007-11-27 13:57:59 · 1 answers · asked by Kenneth R 1 in Chemistry

2007-11-27 13:57:54 · 3 answers · asked by Anonymous in Mathematics

2007-11-27 13:57:34 · 1 answers · asked by blacksmith 3 in Mathematics

2007-11-27 13:56:40 · 1 answers · asked by Anonymous in Biology

two electronics technicians are discussing electrical quantities. technician A says that risitance is an opposition to electrical power and voltage is electrical pressure. technician B says that current is the rate of electrical flow in a circuit and voltage is the opposition to current flow. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B are correct.
d. neither of the two technicians is correct

2007-11-27 13:56:12 · 5 answers · asked by hannah.anonymous 1 in Engineering

For 24.15 - 20.32, would you need to round to 4 significant digits, since it becomes a number less than 10?

I know that when you subtract up and down, when no column has both non-significant digits, then you just make it 3.83? No need for four significant figures?

Samem for 22.55 - 20.33? would be just 2.22, and if it was 20.13 - 20.13, it would just be 0.00?

Significant digits are kind of confusing I guess..

Also, for 0.09/ 3.66 x 100%, would this be rounded to something like 2 percent? just 1 significant digit? and why?

2007-11-27 13:55:02 · 2 answers · asked by Anonymous in Chemistry

Find f from the information given:
f''(x) = -12x^2, f'(0) = 1, f(0) = 2.

Explain your work. Thanks! :)

2007-11-27 13:54:00 · 1 answers · asked by Anonymous in Mathematics

The moon over Roanoke was low, dull red-orange and a big waning gibbous. (I think I spelt that right..)

2007-11-27 13:53:32 · 1 answers · asked by Banjo and Sullivan 6 in Astronomy & Space

two electronics technicians are discussing electronic components. technician A says that electronic components are color-coded to indicate their electrical values. technician B says that electronic components are color-coded to indicate their temperature ratings. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and technician B are correct
d. neither of the two technicians is correct

2007-11-27 13:51:50 · 3 answers · asked by hannah.anonymous 1 in Engineering

Check this, lets say power is on in your home, everything is unpluged and lights are off. Is your meter still running, it should stop or go very very slow. Heres what i wanna know, Now if you turn on 1 light that has a blown bulb, does yor meter start moving or speed up. Do you use any power with the light on that has a blown blub, remember the light bulb isnt giving off any light, does that mean you are using no electric?

2007-11-27 13:51:16 · 7 answers · asked by Speedstar 5 in Other - Science

Because I'm doing my homework, and one of the questions asked us to calculate the pH of H2SO4. The Ka1 of H2SO4 is very large, indicting that it ionizes completely. The answer is pH=0. Does this make sense?

2007-11-27 13:50:19 · 1 answers · asked by Anonymous in Chemistry

A 0.590 kg wood block is firmly attached to a very light horizontal spring (k = 200 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the coefficient of kinetic friction between the block and the table?

2007-11-27 13:49:35 · 1 answers · asked by lcbby 1 in Physics

for my sisters homework, :)

2007-11-27 13:49:33 · 4 answers · asked by Emaleesha 2 in Astronomy & Space

please show work and explane

2007-11-27 13:49:17 · 4 answers · asked by michael s 1 in Mathematics

x^4/5
--------------
x^3/10

2007-11-27 13:48:55 · 1 answers · asked by ry ry 3 in Mathematics

two electronics technicians are looking at the technical manual for a piece of electronic equipment. the manual refers to a particular resistor as a "2.2 megohm resistor." technician A says that this means that the reisitance value of the resistor is 22,000 ohms. technician B says that this means that the resistor can safely carry a current of 2,200,000 amperes. which of the following statements is correct?

a. only technician A is correct
b. only technician B is correct
c. both technician A and B is correct
d. neither of the two technicians is correct

2007-11-27 13:48:50 · 3 answers · asked by hannah.anonymous 1 in Engineering

How much heat is required to raise the body temperature of a 60-kg woman from 21.9°C to 57.3°C?

2007-11-27 13:46:51 · 1 answers · asked by Bob P 1 in Physics