Science & Mathematics - 25 November 2007

a tightrope walker weighing 145 pounds is standing still at the center of a tightrope that is 46.5 feet long. the weight of the walker causes the center of the tightrope to move down 14.5 inches. find the magnitude of the tension in the tightrope .

2007-11-25 05:49:03 · 1 answers · asked by Anonymous in Physics

A 2220 kg car traveling at 11.9 m/s collides with a 2670 kg car that is initially at rest at the stoplight. The cars stick together and move 2.40 m before friction causes them to stop. Determine the coefficient of kinetic friction between the cars and the road, assuming that the negative acceleration is constant and that all wheels on both cars lock at the time of impact.

2007-11-25 05:47:50 · 1 answers · asked by andyjumpman23 3 in Physics

pythagorus i can work out. an irregular triangle how can you work out the lengths of the sides. a sine rule? or cosine rule ? i do not understand these. any help appreciated

2007-11-25 05:47:30 · 5 answers · asked by Anonymous in Mathematics

It's hard to imagine people even being born without proper medical care. How did they deliver babies and keep them free from infection without the benefits of modern scientific medicine? And how did they treat diseases?

2007-11-25 05:45:58 · 25 answers · asked by tinus42 1 in Medicine

We have a wire of 1 m and we bend it in a shape of S. When I say "in shape of S" I mean by sides being verticals and horizontals not curvey sides.

Okay so Four sides of the shape of S are 22.22 cm and one side is 11.11 cm, making it 1 m. So how do I find the center of mass:

1) by hanging the configuration, S, from a string or hook.
2) by measuring the configuration, S, and calculating the Center of mass with formulas.

And one more thing the sides could be on any side it doesnt matter.

Thanks in advance

2007-11-25 05:45:08 · 2 answers · asked by Anonymous in Physics

are there different kinds of threads for a CO2, N2O, He, etc tank? or can you fill any tank with any gas

2007-11-25 05:44:58 · 4 answers · asked by Anonymous in Engineering

Is the plane of the Earth's orbit around the Sun tilted away from the plane of the Sun's orbit around the Galactic Centre?

2007-11-25 05:41:43 · 5 answers · asked by tuthutop 2 in Astronomy & Space

and what is in store for the future and how bad will it get let me no what you all think thanks in advance

2007-11-25 05:39:11 · 12 answers · asked by starlite3597 2 in Weather

2007-11-25 05:39:11 · 6 answers · asked by mz.strawberryz314 1 in Mathematics

the products are:
co2 (carbon dioxide)
ATP
NADH
FADH2

2007-11-25 05:37:05 · 2 answers · asked by veronika 1 in Biology

How would I solve for y given:
x=y^5

2007-11-25 05:35:07 · 3 answers · asked by Michael Skarn 3 in Mathematics

Have you read about the so-called Hydrosonic pump that output heat energy in excess of electrical energy input? Google it and give your opinion please.

2007-11-25 05:31:47 · 8 answers · asked by Jan 3 in Other - Science

2007-11-25 05:30:42 · 3 answers · asked by nflrunes 2 in Mathematics

what is the difference between fermentation and glycolysis?? I'm really confused so if anyone could put it in point blank simpler terms that would be great!!

2007-11-25 05:29:35 · 4 answers · asked by tlkalot369 1 in Biology

If you were able to construct a spacecraft capable of traveling 99.99% the speed fo light and travel to the Triangulum Galaxy (which is 2.5 million light years away) and back, by the time you returned earth wouldhave aged 5 million years, and everything you knew is long gone to dust, but yet you would only have aged about 60 years?
There would be no point in coming back!

2007-11-25 05:26:11 · 4 answers · asked by Anonymous in Astronomy & Space

when burning gasoline what happens to the gas and why is it exothermic?

2007-11-25 05:25:09 · 4 answers · asked by sweet angel 2 in Chemistry

FIND THE DOMAIN OF EACH FUNCTION

f(x)=x2power+2

f(x)=x2power
over x2power +1

h(x)=2x
over x2power -4

G(x) =x+4
over x3power -4x

G(x)=square root 1-x

f(x)=x
line under x
square root x-4

2007-11-25 05:25:01 · 1 answers · asked by Anonymous in Mathematics

sufficient speed to pass directly into the tissue beneath the skin. The speed is high, because the vaccine (1100 kg/m^3) is held in a reservoir where a high pressure pushes it out. The pressure on the surface of the vaccine in one gun is 4.18*10^6 pa above the atmospheric pressure outside the narrow opening. The dosage is small enough that the vaccine's surface in the reservoir is nearly stationary during an inoculation. The vertical height between the vaccine's surface in the reservoir and the opening can be ignored. Find the speed at which the vaccine emerges.

Please Help!

2007-11-25 05:23:37 · 1 answers · asked by iqbalkhanayesha 2 in Physics

2007-11-25 05:19:42 · 4 answers · asked by cdthorse1 2 in Biology

Im wondering what materials like vinager, dishwasher fluid. luandry dtergent and other stuff will help thet plant grow

2007-11-25 05:19:22 · 5 answers · asked by The Answer Guru 1 in Botany

For example, if speed of sound was 332m/s would the particles of air necessarily move at this speed.. why or why not?

2007-11-25 05:16:40 · 1 answers · asked by Anonymous in Physics

Tarzan swings on a 24.0 m long vine initially inclined at an angle of 35° from the vertical.

(a) What is his speed at the bottom of the swing if he starts from rest?

(b) What is his speed at the bottom of the swing if he starts with an initial speed of 2.78 m/s?

2007-11-25 05:16:28 · 3 answers · asked by Anonymous in Physics

use the results to estimate the number of marbles in the bag that are given color.

RESULTS:
RED-7 YELLOW-3 GREEN-5

1. Green


2. blue

2007-11-25 05:13:10 · 4 answers · asked by B3r3N!c3 aKAz Lil' CraZy 1 in Mathematics

A bit of space debris penetrates the hull of a spaceship traversing the asteroid belt and comes to rest in a container of water that was at 0oC before being hit. The mass of the space rock is 0.92g and the mass of the water is 1.15kg. If the space rock traveled at 8.17 x 103 m/s, and all of its kinetic energy was used to heat the water, what is the final temprature of the water?
Assume the interaction happens fast enough that the water does not boil.

2007-11-25 05:11:37 · 1 answers · asked by Anonymous in Physics

who to listen to when it comes to medications.

2007-11-25 05:10:00 · 8 answers · asked by Mr M 3 in Medicine

a horizontal force of 198 N is exerted on a 20 kg wooden box in order to slide it up a 30 degree incline. the coefficient of kinetic friction is 0.2. Find the force of kinetic friction. Find the acceleration of the system.

2007-11-25 05:09:48 · 1 answers · asked by Anonymous in Physics

The temperature of the calorimeter increases by 3.2°C. Calculate the energy of combustion of quinone per gram and per mole.

2007-11-25 05:08:18 · 1 answers · asked by Anonymous in Chemistry

2007-11-25 05:07:33 · 4 answers · asked by Elizabeth R 1 in Mathematics

how would i go about doing this? and also [F(x+h)-f(x)]/H, if f(x)=4x+3?

2007-11-25 05:02:57 · 2 answers · asked by Anonymous in Mathematics

What are the ripples?

2007-11-25 04:59:15 · 4 answers · asked by David Junior 3 in Engineering