Science & Mathematics - 20 November 2006

An expandable cylinder has its top connected to a spring with force constant 2.00 103 N/m. (See Fig. P10.58.) The cylinder is filled with 4.50 L of gas with the spring relaxed at a pressure of 1.00 atm and a temperature of 20.0°C.

Here is the link to the figure:

http://i136.photobucket.com/albums/q200/physics2006/physics2.gif

ANd the questions are:

a) If the lid has a cross-sectional area of 0.0100 m2 and negligible mass, how high will the lid rise when the temperature is raised to T = 260°C?

cm

(b) What is the pressure of the gas at 260°C?

Pa

2006-11-20 17:56:39 · 2 answers · asked by Anonymous in Physics

Please tell me how to wire the bulbs together, the voltage ratings of the bulbs and the values of any componants (resistors?) needed between each bulb to allow them to light in sequence as the DC voltage increases from 1 to 12 volts. I would be extremely appreciative of this information on a home project of my own. Thank you in advance for your considerations. Monty

2006-11-20 17:54:38 · 6 answers · asked by dick chronic 1 in Engineering

Q: The density of diamond is 3.51 g/cm^3. What is the volume of 1 mole of carbon in this form?

My Approach:

3.51g/cm^3 x (1mol C/12 g C) = .293 mol/cm^3

1 mol/ .293 mol/cm^3 = 3.41 cm^3 <----my answer

I might be wrong about how may C's a diamond has...please someone confirm if im right!!! thanks appreciate it

2006-11-20 17:54:14 · 2 answers · asked by Anonymous in Chemistry

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does t^(2k+1) x t^1= t^(2k+2)

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For the reaction


NH3 + O2 → NO + H2O

2006-11-20 17:36:49 · 4 answers · asked by g G 1 in Chemistry

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How to solve...

The no. of bandaids needed in a situation are normally distributed with mean 60 and Sd 12. How many bandaids should be available so that the supply will be adequate 99% of the time.

2006-11-20 17:35:38 · 2 answers · asked by Anonymous in Mathematics

A certain compound was found to have a molar mass of 32.042 g. A 4.078 g sample of this compound was burned in pure oxygen gas. The measured amount of CO2 produced was 5.601 g, while that of H2O was 4.586 g. No other products were produced in the reaction.

2006-11-20 17:35:30 · 2 answers · asked by g G 1 in Chemistry

More soluble than covalent substances.

2006-11-20 17:32:30 · 5 answers · asked by geniusflightnurse 4 in Chemistry

An expandable cylinder has its top connected to a spring with force constant 2.00 103 N/m. (See Fig. P10.58.) The cylinder is filled with 4.50 L of gas with the spring relaxed at a pressure of 1.00 atm and a temperature of 20.0°C.

Here is the link to the figure:

http://i136.photobucket.com/albums/q200/physics2006/physics2.gif

2006-11-20 17:31:19 · 3 answers · asked by Anonymous in Mathematics

Problem 1: Find the polynomial f(x) of degree three that has zeroes at 1,2, and 4 such as f(0)=-16. & Problem 2: The degree three polynomial f(x) with real coefficients and leading coefficient 1, has 4 and 3 + i among its roots. Express f(x) as a product of linear and quadratic polynomials with real coefficients. & Problem 3: Given that (3x-a)(x-2)(x-7)=3x^3-32x^2+81x-70, determine the value of a.

2006-11-20 17:30:38 · 9 answers · asked by Anonymous in Mathematics

send refff site address

2006-11-20 17:21:22 · 2 answers · asked by Vivek R 1 in Engineering

A fair coin is tossed four times and the random variable X is the number of heads in the first three tosses and the random variable Y is the number of heads in the last three tosses.
a) Construct a joint probability distribution of X and Y.
b) If there is one head in the last three tosses, find the conditional distribution of X.

2006-11-20 17:19:46 · 6 answers · asked by lostinmath 1 in Mathematics

If the moment generating function of a random variable X is given by
Mx(t) = e(3t +8t^2), find the mean and variance of X.

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Is there anything bigger than the sun because I think the sun is the biggest, but I am not sure. If there is anything bigger than the sun please tell me.

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