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As the temperature increases materials with large coefficients of linear expansion increase a lot in size while materials with small coefficients of linear expansion increase a in size?
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the correct answer is little!!!! ------APEX ;)
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Why do material change size when they change temperature?
The cause is the thermal expansion of materials.
Why are coefficients of friction unitl-ess values?
Contacting surfaces can be of various materials
What happens if the temperature of a diode increases?
When the amount of current passing through a circuit increases, it generally increases the temperature, and consequently the resistance. Simply stated, it is harder for the current to pass through the circuit if the temperature increases. The Large Hadron Collider uses superconductors to pass current to its electromagnets. A superconductor passes current through its circuit materials with almost no resistance at all, generally by supercooling the circuit materials.
Why does liquid inside a thermometer rise as the temperature s increase?
Most materials expand with the temperature increases. In this case, the liquid in the thermometer expands faster than the glass that holds it.
How would the size of an object affect the rate of change in temperature?
When a substance is heated, its particles begin moving and become active thus maintaining a greater average separation. Materials which contract with increasing temperature are rare; this effect is limited in size, and only occurs within limited temperature ranges. The degree of expansion divided by the change in temperature is called the material's coefficient of thermal expansion and generally varies with temperature.
Why does the resistance of a thermistor decrease as the temperature rises?
Some materials have negative temperature coefficients of resistance, and some have positive temperature coefficients. Carbon is an example of a substance with a negative thermal coefficient of resistance, so it's resistance will decrease as it gets hotter.
Do The resistance of a material generally increases as its temperature increases?
The answer to this depends on the material from which the resistance is made. For most materials resistance increases with increasing temperature. This is referred to as having a "positive temperature coefficient". Some materials have a negative temperature coefficient; these do have uses in electronics.
Why do telephone wires in warm weather slack?
All materials expand with temperature increases. This expansion in the metals and plastics of phone lines would cause them to lengthen, and thus go slack.
What is the increase in volume cause by a decrease in temperature?
It's called expansion, or thermal expansion. It's usually noted by the Greek character alpha.Most materials have alpha values greater than zero, so the thermal expansion occurs when temperature increases. However, some other materials have negative thermal expansion, as happens with water. Liquid water will increase its volume under cooling conditions below ~4 ºC. It will also increase it's volume as the temperature rises away from 4o C.
Why do material change size when they change temperature?
The cause is the thermal expansion of materials.
Swamping resistor is made up of?
Swamping resistor is mostly made of manganin or constantan because these materials have temperature coefficients very close to zero thus there is a very less change in the resistance of these materials with change in temperature.
Is the coefficient expansion for surface areas three times that of linear expansion?
The coefficient of expansion is a characteristic of materials. It allows one to predict the degree to which the material will expand at a given temperature. A slab of metal has no idea which way it's expanding; it just expands. So it expands approximately the same amount in every direction. This means that surface area increases by about two times. Volume increases by about three times.
Why do materials have different coefficient of friction?
Different materials have different coefficients of friction because the materials have different microscopic bumps and valleys which cause the friction to begin with. Coefficients of friction are constant for each material.
What can result from the Expansion and Contraction of objects?
If two materials with different coefficients of expansion are held together (by rivets glue or some other means) and subjected to changing temperatures the resultant stress might cause one or the other or both to fail (break).
How does volume affect temperature?
Normally there is no affect. In a gas, a CHANGE of volume of a single body, will give a change in temperature. If a gas is compressed the temperature will increase. If a gas is allowed to expand, there will be a reduction in temperature. This principle is used in diesel engines, to ignite the fuel by compression and fridges, where an expansion of gas causes cooling.
What is creep thawing and freezing?
Creep is known to heat the subject materials for long period of times. It gets to where the materials get near the melting point with the increases of temperature.
Why are coefficients of friction unitl-ess values?
Contacting surfaces can be of various materials
