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Why do railway tracks sound louder in winter than in summer is it expansion or contraction?
Wiki User
∙ 9y ago
Contraction is the reason that railway tracks sound louder in winter.
Wiki User
∙ 9y ago
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Why do bridges and rail tracks can buckle when they expand because of heat?
One common reason is thermal expansion and inadequate allowance for such expansion .Railway tracks expand when they get warm, for example, in the summer. Because they are long and narrow, the expansion is most noticeable along their lengths. If there is not enough space between tracks to allow for such expansion, then adjacent sections will soon abut one another and any further expansion will result in buckling. At the same time, it is not practical to leave large expansion gaps between sections because these lead to the railway wheel dropping and the clattering sound of trains. Although possibly romantic, the clattering is a result of impacts and, over time, it can wear out the tracks.Similar issues arise with metal sections on bridges, and you will often experience periodic "bumps" as you drive along a long road bridge..
What is the property of matter where it changes volume when it changes temperature?
The property of solids in which they enlarge when warmed is thermal expansion. The opposite, shrinking when cooled, is thermal contraction. This property greatly effects how bridges, sidewalks, and concrete roads are made. They all have "expansion gaps," gaps between sections that allow the sections to expand in the heat of summer. Without those, the concrete would break and the bridges would warp and bend.
What is thermal expansion and how bridge roads and sidewalks compensate or deal with thermal expansion?
Thermal expansion (TE) is a process in which materials expand due to changes in temperature. How different structures deal with or compensate thermal expansion (just some examples): Bridges and other structures have expansion joints (there are gaps in the road, which you hear/feel when crossing them in a car for example - usually in both ends of the bridge and sometimes in between as well, depending on the lenght of the bridge). Sidewalks - depends on the material of the sidewalk (sometimes there may be some spaces between different sections, but the temperature fluctuations are not so huge that it is reasonable to use any predicament against TE. Railroads - do you know the banging sound really associated with trains and railroad? This is a basic example of thermal expansion compensation. The tracks are assembled so that the ends of two track sections are not touching each other. The gap in between allows the track to expand in heat (therefore the sound of train wheels rattling is louder in the winter when the gaps are bigger and less in the summer)
Why does the Eiffel tower grow in summer?
The heat from the Sun causes the metal framework of the tower to expand slightly. The same happens to any exposed metal structure - including bridges. That's why bridges have an 'expansion gap' at each end.
What will happen to the telephone lines if they are fitted tightly from pole to pole?
When a pole shifts with the earth it will pull the wires apart and cause a break somewhere in the line. The poles are meant to suspend the wires in air, not to stretch them... Accurate answer is the lines will break. While breaking is not normally due to poles shifting, that could happen. The reason the wires are slung loosely is because of the expansion and contraction properties of the metal wires. If you look at the lines in the winter, they do not sag much (are tighter) and in the summer the sag is pronounced (looser). If they were strung tightly, they would eventually break during the cold weather.
Why does the Eiffel Tower grows by 2 cm in summer and shrinks by 2 cm in winter?
it is due to expansion and contraction
Why do you use a construction joint?
Construction joints are very useful, the expansion & contraction made is made in summer & winter season respectiely. In summer coz of temprature concrete get expansion in mm but it damage the structure, that's why construction joint is provided. Sunil Nagargoje TESPL
When was Summer Hill railway station created?
Summer Hill railway station was created in 1879.
Why does the expansion joints in a sidewalk get narrow in the summer and get wider in the winter?
Expansion joints in sidewalks are designed to accommodate the natural expansion and contraction of the concrete due to temperature changes. In the summer, the concrete expands with the heat, causing the joints to narrow. In winter, when the concrete contracts in the cold, the joints widen to prevent cracking and damage to the sidewalk.
Why would a bridge contain gaps where the metal pieces fit together?
these gaps "joint" are used to prevent cracking due to expansion and contraction which result from the change in temperatures between summer and winter and night and day
Why there is a gap between rails in railway track?
The rails expand on account of thermal expansion due to increased temperature in summer
Why does the Eiffel tower get taller in summer?
The Eiffel Tower gets bigger in the summer becaus of Thermal Expansion. It gets 15cm taller.
Why are electric wires left lose between poles?
To allow for expansion and contraction of the metal wire. In the heat of the summer, the wire will expand (lengthen) and will appear to sag between the poles. In the cold of winter, the wire contracts (shortens) and will tighten up between the poles.
What song does the chorus from louder than ever by daughtry sound like?
summer of '69 by bryan adams
Sidewalks are built with cracks because in the summer something occurswhat is it?
they r called contraction joints. then every few of those then expansion joint. concrete is going to crack, so make it crack so it can't be seen,under the man made ones. concrete tends to crack symmetrically. so if ur sidewalk is 3 feet wide the contraction joints will be every 3 feet. then expansion joint, 3/4 inch with expansive material, every 4th one.
What band sings the song louder?
In recent months, there have been three new songs called Louder that i know of. 1. Louder, the debut single of all-new girl band Parade. 2. Louder by Katy B, also famous for Katy on a Mission and Broken Record. 3. Louder by DJ fresh, who last summer released a lesser-known single called 'gold dust'.
Why do bridges and rail tracks can buckle when they expand because of heat?
One common reason is thermal expansion and inadequate allowance for such expansion .Railway tracks expand when they get warm, for example, in the summer. Because they are long and narrow, the expansion is most noticeable along their lengths. If there is not enough space between tracks to allow for such expansion, then adjacent sections will soon abut one another and any further expansion will result in buckling. At the same time, it is not practical to leave large expansion gaps between sections because these lead to the railway wheel dropping and the clattering sound of trains. Although possibly romantic, the clattering is a result of impacts and, over time, it can wear out the tracks.Similar issues arise with metal sections on bridges, and you will often experience periodic "bumps" as you drive along a long road bridge..
