Engineering - November 2007

Hi everyone
Well here is the thing,

whenever I turn the tap water on at a little water flow, the water flow degrades slowly by time, after about 1-2 minutes it is dripping and about another 1-2 minutes after it stops completely. (sometimes it takes even less than a minute)

This happens at the taps of both my baths (there are two baths) and at both cold and warm water.

WHY is this happening?


ps.Also I am at the first floor of the building, the taps are working great in other aspects, the cold water comes directly from the water network and the warm water comes from the "water warmer" tank. And there is not any other water flow in the house at the time this happens.

ps2. It is not annoying, neither a problem, there is no reason for me to change this but I am just curious WHY MECHANICALLY is it happening.

2007-11-30 23:38:48 · 3 answers · asked by phoebus16 2

Where can i find information on your ordinary variety mild steel, i need to figure this out:

A solid steel rod is of a certain length and supported at each end, its diameter is 1 inch, how much force will it take the bend it?

2007-11-30 20:20:03 · 2 answers · asked by Jesse C 1

What colleges would you advise. IN the state of california and near to the city of lynwood, ca 90262.. please help fast!!!!!!!!!!!!

2007-11-30 16:24:11 · 1 answers · asked by G~5T@+UZ 1

2007-11-30 15:47:40 · 3 answers · asked by swit2be 1

For Technical People in silica processing, how would you separate iron oxide (non magnetite) from silica. Will it work on centrifugal separation with air or water medium?

2007-11-30 15:07:28 · 1 answers · asked by Manuel 1

what do they use. I made a small helicopter. HOW DO I BALANCE IT.? i don't wana put more weight to balance it. i want to find the center point of the helicopter.
how do engineers do it.
plz explain
DEsperate person.

2007-11-30 15:00:39 · 1 answers · asked by Helo P 1

Does an electric oven give off Carbon monoxide?

2007-11-30 14:29:50 · 7 answers · asked by Anonymous

I'm wondering about the advisability of buying one of these heaters.

2007-11-30 13:55:33 · 7 answers · asked by fredtheopope@sbcglobal.net 1

In a mercury thermometer the capillary tube has a diameter of 0.0018 cm and the bulb has a diameter of 0.25 cm. Without the expansion of the glass how can I find the change in height of the mercury column for a temperature change of 35 degrees cecius if coefficient of volume expansion is 0.00018?

2007-11-30 13:33:29 · 2 answers · asked by glance 3

Could you kindly direct me to a website that explains this?

2007-11-30 12:48:28 · 3 answers · asked by Mathieu 1

From mining silica (feldspar) what process and equipment is used to remove or reduce the 7 - 2 % iron oxide to acceptable level of 0.25 % or lower?

2007-11-30 11:56:41 · 1 answers · asked by Manuel 1

This is to estimate freeze time required for backyard rink

2007-11-30 11:37:34 · 2 answers · asked by yekcoh 1

I am talking about the valve installed in sinks and toilets in public reatrooms through out the country.

2007-11-30 10:18:54 · 1 answers · asked by Robert L 1

Is it possible to make virtual simulation glasses like the ones posted at the link below. http://www.youtube.com/watch?v=TNUfefCGMwE (Time - 1:30) Is possible to create such an immersive experinece using just glasses? I've seen that scene in the movie and he's sorounded by 4 compuetr colums but could it work without them just make them a big as cyclops's visor maybe. Whoever is reading this question and has theory on how this might work PLEASE ANSWER.

2007-11-30 08:17:19 · 1 answers · asked by Anonymous

The value of z is calculated from the following formula:
z=(12a+5b)/(11a+19b)

a is increased by 2.2%
b is increased by 1.2% of a
Using partial differentiation, find an expression for the percentage change in z in terms of a and b.
b is measured as 11.
What non-zero value of a would result in a zero percentage change in z?

2007-11-30 07:56:25 · 1 answers · asked by ozi 1

For all you Power Engineers and Thermodynamicists out there. We have 90mL of water sitting at the end of a non-insulated pipe. The water drained out from a steam trap valve located at the outlet. We know the temperature of the inlet steam but not the condensed water (has not been sitting long enough to be room temp.) How do we convert this volume to a mass?

2007-11-30 06:12:46 · 3 answers · asked by Chubbs20 2

2007-11-30 05:33:21 · 8 answers · asked by serdar k 1

2007-11-30 03:41:51 · 5 answers · asked by Anonymous

So confused!! can you tell me the challenges in both? is chemical mostly based on thermodynamics? which one is more math heavy?


please help

2007-11-30 03:05:55 · 7 answers · asked by shama 1

2007-11-30 02:25:00 · 1 answers · asked by Anonymous

What is mean by decoder? how to design a decoder?(digital logic)

2007-11-30 01:38:18 · 2 answers · asked by L 1

What is 4-bit asynchronous UP counter means?(digital logic)

2007-11-30 01:36:28 · 3 answers · asked by L 1

How are they different from other valves ?

2007-11-29 23:38:55 · 1 answers · asked by robin 3

to increase fuel economy by assisting acceleration?

2007-11-29 22:56:49 · 6 answers · asked by pete the pirate 5

I am offered a new technology Electrode earthing, where-in they use a 3mt G.I. electrode and fill the pit with a compound, mainly containing 'Sodium-bentonite', which is supposed to retain moisture 13 times it's volume and for quite long so that frequent watering is not required. But the initial ohmic-value of the earth point is not guaranteed, because they say the ohmic-value depends on the soil resistance.
But conventional plate earthing guy is saying you will definitely get even less than 1 ohm resistance also. But problem here is that the plate will start corroding in 3/4 years, due to presence of heavy salt and thus resistance will automatically increase then.
But in Electrode earthing, whatever is the initial resistance, it remains the same for many years as there is virtually no corrosion at all because the compound has a neutral pH value.

My question is, is it OK to mix bit of salt in the compound, so as to get the initial ohmic-value very low ?WHICH IS BETTER EARTHING ?

2007-11-29 20:07:45 · 5 answers · asked by Anonymous

An old classmate that I have been talking to on line said that's what her husband does at a school. Never heard of it but figured someone here might know. Thanks

2007-11-29 19:29:21 · 4 answers · asked by nanabanana 2

I read once that the basic technology for the modern cellphone actually was invented decades ago but the patents expired before the inventor could make any money. Apparently cellphones are the great-grandchildren of that phone-in-a-box you always saw Cpl. Radar using on the MASH television show. My question is how was the technology adapted? How did something from the 1940s become a 21st century necessity?

2007-11-29 15:24:02 · 4 answers · asked by Brian G 3

2007-11-29 14:58:47 · 9 answers · asked by myfrigginjunklist 2

I have to make a car that is solemly powered by a mousetrap, this car has to go up a 30 degree hill, it has to be light...
But I would like to see if anyone has any good suggestions.
THANKS...

2007-11-29 14:37:50 · 1 answers · asked by MARIA16548 2

Does Horizontal integration means that it own products for ones industry or trade products???

2007-11-29 14:19:05 · 1 answers · asked by Anonymous