Science & Mathematics - 18 December 2006

I have a new car that has interior vibration at certain RPM levels. The dealer says there is no vibration. I need to prove them wrong. How can I measure vibration inside a running car?

2006-12-18 14:42:57 · 9 answers · asked by Anonymous in Engineering

45/21 times 49/9 divided by 3/42
and

20/36 times 24/5 divided by 54/9

please help and thanks for your time please explain

2006-12-18 14:42:28 · 10 answers · asked by OnSomeLousyPlanet 1 in Mathematics

How much can come of nanotechnology, what are its benefits, is it a fad?

2006-12-18 14:42:26 · 3 answers · asked by Anonymous in Engineering

I'm not looking for the common name (though I would appreciate it if you'd include it) I'm looking for things like the scientific name, phylum, class, species, etc

All the links lead to a differant picture, but some are the same insect

*adding details for links*

2006-12-18 14:41:28 · 2 answers · asked by Ethernaut 6 in Biology

The object is slender in nature and aerodynamic. Is it possible that when a wrecking ball cannot knock a building down with one hit, said object knock down said building with one hit going at 100-600mph?

2006-12-18 14:41:17 · 5 answers · asked by Anonymous in Physics

2006-12-18 14:40:28 · 3 answers · asked by a601fitter 1 in Chemistry

x squared - 6x +13

2006-12-18 14:39:47 · 4 answers · asked by Anonymous in Mathematics

I pretty much understand it but i was just wondering if there was anything i missed. Just tell me everything u know on it. Im just interested

2006-12-18 14:38:56 · 3 answers · asked by gtarplyr98 1 in Physics

How many grams of Ca(OH)2 are needed to make 100.0 mL of 0.250 M solution? I'm not exactly sure of how to figure this out, but when I tried it, I got 1.85 g. Is this correct?

2006-12-18 14:37:09 · 5 answers · asked by !!! 3 in Chemistry

2006-12-18 14:37:05 · 4 answers · asked by jaellis20 1 in Biology

A disk of negligible mass and radius 22 cm is constrained to rotate on a frictionless axis about its center. On the disk are mounted masses of 25 grams at a distance of 16.06 cm from the center, 6 grams data distance of 9.02 cm from the center and 31 grams at a distance of 4.4 cm from the center. A uniform force of .06983 Newtons is applied at the rim of the disk in a direction tangent to the disk.
•What torque is applied to the disk?
•What will be the resulting change in the angular momentum of the disk if the torque is applied for `dt = 4 seconds?
•What is the resulting change in the velocity of the disk?
•If the disk starts from rest, through what angular displacement will it rotate during the `dt seconds?
•Through what distance will the rim move during this time, and how much work is therefore done by the applied force in this time?
•What is the kinetic energy of the disk, as calculated using its initial and final angular velocities and moment of inertia?

2006-12-18 14:35:08 · 1 answers · asked by tanie 1 in Physics

2006-12-18 14:33:53 · 25 answers · asked by LIZA 4 in Biology

2006-12-18 14:32:56 · 2 answers · asked by malancam55 5 in Geography

2006-12-18 14:32:52 · 1 answers · asked by Emmanuel M 1 in Weather

If this helps, the polynomial is:

f(x)=5x^3 +3x^2 -7x +18

2006-12-18 14:31:27 · 4 answers · asked by C 1 in Mathematics

2006-12-18 14:30:41 · 7 answers · asked by jean g 1 in Chemistry

2006-12-18 14:26:30 · 1 answers · asked by CAROL H 1 in Mathematics

why are humans so cruel to animals? plus, i think fur coats should be illegal.

2006-12-18 14:26:28 · 17 answers · asked by vera 2 in Zoology

For any integer n greater than 1, find the number of prime numbers between n!+1 and n!+n

2006-12-18 14:26:10 · 5 answers · asked by mascga3 1 in Mathematics

Step by step, please.

2006-12-18 14:24:46 · 5 answers · asked by Corpral Clegg 2 in Mathematics

2006-12-18 14:24:15 · 42 answers · asked by 2dang cute 1 in Mathematics

1. What is the horizontal force necessary to drag a brick that weighs 60 N on a wooden table (µk= 0.7) at constant velocity?
1.1 if you pull on the brick horizontally with a force of 80 N, what is its acceleration?

2006-12-18 14:23:04 · 3 answers · asked by vintagex50s 2 in Physics

I don't get how to name the type of reaction
how to provide teh products and teh name and formula
Al(s)+S(s)----? would the product be AlS(s), direct combination???
Zn(s)+H3PO4(aq) would it be single replacement ZnPO4+H3 but i don't know the aq or s
calcium hydroxide is added to hydrochloric acid
CaOH+HCl---CaCl+H2O would it be double replacement but also don't know the aq or s
Add sodium oxide into water
NaO+H2O----????no idea

2006-12-18 14:22:03 · 4 answers · asked by silentcargo 3 in Chemistry

2006-12-18 14:21:56 · 3 answers · asked by mark v 2 in Weather

1. The Druids who built stonehenge had to contend with lots o' friction. If the coefficient of friction between stone and dirt is µk=0.6, a) what would be the force necessary to drag a 1300 kg rock at constant velocity? (You must find the weight of the rock first!!)
1.2 if the rock was dragged by a rope horizontally with a force of 19000 N, what is its acceleration?
2. What is the acceleration of a 19 kg sled with plastic runners on dry snow (µk=0.3) if a horizontal pulling force of 100 N is applied to it?
2.2 how much force must it be pulled with so it goes at a constant velocity?
3. What is the acceleration of a 4 kg crate, if you push it with a force of 110 N, and the coefficient of kinetic friction between the crate and the floor is µk=0.3?
3.1 how much force must it be pushed with so it goes at a constant velocity?

2006-12-18 14:21:01 · 3 answers · asked by vintagex50s 2 in Physics

Other than the Bahamas.

2006-12-18 14:19:54 · 13 answers · asked by Anonymous in Geography

2006-12-18 14:18:38 · 17 answers · asked by Emmanuel M 1 in Weather

2006-12-18 14:15:33 · 1 answers · asked by nobody 1 in Physics

A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride, a chemical that is used to control highway dust, strengthen concrete mixes and add flavor to foods, is produced by this reaction. 2HCl + Ca(OH)2 --> CaCl2 +2H2O
a)How many moles of hydrochloric acid are present in this reaction?
b)How many moles of calcium hydroxide are present in this reaction?
c)Was there enough hydrochloric acid to neutralize all of the calcium hydroxide? Provide support for your answer.
d)How many moles of excess reagent were left over?
e)What is the theoretical yield of calcium chloride?
f)If 187 g of calcium chloride were obtained after the neutralization was complete, what was the percent yield?

2006-12-18 14:14:24 · 2 answers · asked by chemistrystudentinneed 1 in Chemistry

2006-12-18 14:13:46 · 6 answers · asked by bonekingz 1 in Other - Science