Science & Mathematics - 28 October 2007

2007-10-28 05:37:57 · 4 answers · asked by rkdonle 1 in Engineering

final answer should be y=12x-13

2007-10-28 05:37:27 · 3 answers · asked by lovebird 3 in Mathematics

a rock is thrown vertically from the ground with a velocity of 24 meters per second, and it reaches a height of 2+24t-4.9t^2 after t seconds. How many seconds after the rock is thrown will it reach max. height and what is the max. height of the rock in meters? how many seconds after it is thrown will it hit the ground?

2007-10-28 05:37:21 · 3 answers · asked by ~USA~ 2 in Mathematics

If Nitrogen isn't broken, how can it be fixed?
refering to plants and how this process is unfolded.

2007-10-28 05:24:14 · 3 answers · asked by Anonymous in Agriculture

the equation w=120I-12I^2 represents the power(W) in watts, of a 120 volt circuit having a resistance of 12 ohms. when a current (I) is flowing through the circuit what is the max. power in watts that can delivered in this circuit

2007-10-28 05:22:16 · 3 answers · asked by ~USA~ 2 in Mathematics

A loaded ore car has a mass of 950 kg and rolls on rails with negligible friction. It starts from rest and is pulled up a mine shaft by a cable connected with a winch. The shaft is inclined at 30.0 degrees above the horizontal. The car accelerates uniformly to a speed of 2.20 m/s in 12.0 seconds and then continues at a constant speed. (a) What power must the winch motor provide when the car is moving at a constant speed? (b) What maximum power must the motor provide? (c) What total energy transfers out of the motor by work by the time the car moves off the end of the track, which is of lenght 1,250 m?

2007-10-28 05:20:34 · 2 answers · asked by lgd1356 1 in Physics

I did a experiment. Notice that when the thyristor is fired on, the gate voltage (0.56) immediately increased to a higher value (0.82) (gate on voltage). Y the voltage increased??

2007-10-28 05:19:35 · 1 answers · asked by Lo R 1 in Engineering

How much energy is lost if one person passes a subject in one year but he do not earn his livlihood from the knowledge what he has gained from that subject?

2007-10-28 05:17:13 · 4 answers · asked by GORAWALIA SHAH 1 in Mathematics

I need to know the 4 subjects of earth science. Please help

2007-10-28 05:09:20 · 4 answers · asked by Str1pes 2 in Earth Sciences & Geology

my bloodpressure is SYS:102 , DIA": 65 pulse: 74
that's ok right?

2007-10-28 05:07:03 · 6 answers · asked by SilverGirl@21st 1 in Medicine

Hello, I'm trying to make a schmitt trigger with a sinusoidal input , and I want digital type outputs (5V, 0V). Every example I've found assumes Vsat+ and Vsat- are symettric about the X axis.

2007-10-28 05:05:44 · 3 answers · asked by rrossorr 3 in Engineering

who discovered silicon?

2007-10-28 05:03:56 · 4 answers · asked by ciaramichelle93 1 in Physics

better yet, can you walk me through this ?.?
2C4H10 + 13 O2 = 8CO2 + 10 H2O
what volume in Liters of H2O is formed when 3.44Liters of C4H10 is burned? Assume both gases are measured under the same conditions.

2007-10-28 05:02:53 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-28 05:02:22 · 5 answers · asked by Anonymous in Physics

ten times

one hundred times

or

one thousand times

2007-10-28 04:59:02 · 4 answers · asked by Anonymous in Chemistry

2007-10-28 04:55:57 · 2 answers · asked by !molly! 1 in Chemistry

2007-10-28 04:55:56 · 2 answers · asked by cassidy☮ 3 in Earth Sciences & Geology

Why are the following disadvntages for living near a volcano:
Sea
Lava Flow
Pyroclastic Flow
Mudflow
City?
Why are the following advantages of living near a volcano:
Sea
Fertile Soils
Tourism
Quarry
Geothermal Energy?

2007-10-28 04:55:50 · 9 answers · asked by Anonymous in Earth Sciences & Geology

It must be at least 10 mucleotides long
It must have a double helix shape
It must include: sugar, phosphate, adenine, thymine, guanine, cytosine, and hydrogen bonds

2007-10-28 04:53:41 · 2 answers · asked by Anonymous in Biology

What is Hrxn for the reverse reaction of

1/8 S8(s) + H2(g) H2S(g) Hrxn = -20.2 kJ

2007-10-28 04:53:40 · 1 answers · asked by raleighzia 1 in Chemistry

what log base 8 of 0.001953125?
because i need help please find it

2007-10-28 04:50:46 · 6 answers · asked by star baller 360 5 in Mathematics

Spell/Ritual to banish negativity?
For much of past 3.5 yrs i have been frequently agaitated because an evil woman fired me to get herself off and since then i have bounced from job to job but never landed on my feet i have some hope for career in future but having trouble dealing with bouts of rage depression medication makes it more tolerable but i want to get rid of it for ever need help
0 seconds ago - 4 days left to answer.

2007-10-28 04:50:02 · 11 answers · asked by Anonymous in Parapsychology

2007-10-28 04:49:36 · 3 answers · asked by FRANCO 2 in Engineering

2007-10-28 04:49:12 · 5 answers · asked by Anonymous in Weather

c) sin[cos^-1(-(sq root 3)/2)]


d) cos^-1[cos(2pi/3)]


e) cos[sin^-1(1/2)]

2007-10-28 04:49:03 · 2 answers · asked by Anonymous in Mathematics

2007-10-28 04:47:24 · 7 answers · asked by Anonymous in Biology

Perform the indicated operation:

a + 3/a^2 – 9 ÷ 4a + 12/5a – 15

Write the answer in lowest terms.

Thanks!

2007-10-28 04:46:32 · 1 answers · asked by Pete 1 in Mathematics

2007-10-28 04:45:02 · 9 answers · asked by Anonymous in Astronomy & Space

Perform the indicated operation:

2/x-1 + 3/2x-2

Write the answer in lowest terms.

Thanks!

2007-10-28 04:41:27 · 9 answers · asked by Pete 1 in Mathematics

If I weight 625 N on earth. How much would I weight on Venus? Venus' mass is 4.88 x 10^24 kg and it has a radius of 6.07 x 10^6 m.

Please help me on this

2007-10-28 04:37:40 · 1 answers · asked by Anonymous in Astronomy & Space