0
How much does wood expand with changes in temperature eg a 50cm oak plank going from 20C to 30C under constant humidity?
Wiki User
∙ 14y ago
Under constant humidity wood won't expand much from 20c to 30c. Moisture is the leading cause of expansion in wood products.
For an exact answer you'll need to specify with the grain or against it.
You can then use the coefficients located here
http://www.inspect-ny.com/exterior/Coefficients_of_Expansion.htm
0.0000030 (across grain)
0.0000027 (parallel to grain)
put them into the calculator located here
http://www.ajdesigner.com/phpthermalexpansion/thermal_expansion_equation_linear_length_change.php
Which give the following answer
0.015 millimeters across grain
0.0243 millimeters Parallel to grain
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Do gases expand in heat?
Yes. If the temperature increases, the gas expands (assuming the pressure remains constant).
What are examples of expansions and contractions of matter?
Basically, matter can expand or contract due to changes in temperature, or in pressure.
Does glass break or crack with temperature changes?
When temperatures changes this can cause the molecules in an object to contract [ at low temperatures ] or to expand [ high temperatures ] . Glass is a fragile object and if the molecules in glass contract or expand quickly this can cause the glass to break . [SRM] .
Do different liquids expand by different amounts for the same rise in temperature?
Yes, different liquids have different coefficients of volume expansion, which means they expand by different amounts for the same increase in temperature. This is because the molecular structure and composition of liquids vary, leading to different responses to changes in temperature.
When the temperature is constant gas volume will decrease as the pressure decreases is that true?
If I remember correctly it is a little more complicated than that. The general equation PV=nRT for an ideal gas is elementary knowledge. The fact is that when you increase temperature many things can happen. It depends on how you treat your system. In general if you increase temperature in an open system the pressure will remain fairly constant, but the volume will increase. If it is a closed system in which the volume is not allowed to expand the pressure will increase with increased temperature. You also have to remember chemical properties also such as phase changes. Hope that rambling mess helps lol.
How much does oak expand and contract with changes in humidity?
loads
Why do they leave a gap between the flooboards and the wall?
So that the floorboards can expand and shrink as humidity and/or temperature changes. If they were right up against the wall, any expansion could lead to buckling.
What do changes in temperature cause rock to do?
Changes in temperature cause rock to expand and contract. This may cause them to crack, and pieces may break off.
Do gases expand in heat?
Yes. If the temperature increases, the gas expands (assuming the pressure remains constant).
What causes a sealed bag of vegetables to expand when it is heated in a microwave?
the temperature of gas changes (APEX) :)
What cause a sealed bag of vegetables to expand when it is heated in a microwave oven?
The temperature of the gas changes.
What use of conservator tank in transformer?
To enable the oil in the transformer tank to expand and contract with temperature changes.
What are examples of expansions and contractions of matter?
Basically, matter can expand or contract due to changes in temperature, or in pressure.
Why is 1 meter length kept in 0 degree Celsius?
All metals expand when heated and contract when cooled. It is important, therefore, that the standard metre is kept at some constant temperature. That constant temperature could be any temperature but the triple point of water is a convenient benchmark.
How does weather effect wood strength?
Weather can effect "wood" strength in a variety of ways. The main thing that effects wood is the humidity changes. There is often a large humidity change when weather fronts come in. This causes the wood to shrink and expand.
Why does Mercury stay in the barometer?
A barometer is a closed-system vacuum that allows the mercury to expand with changes in temperature and pressure.
What causes a sealed bag of vegetables to expand when its heated in the microwave?
The temperature of the gas changes
