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Is a material with a lower R-value a better insulator than a material with a high R-value?
MelissaCollison
No. A higher R-value is a better insulator.
Wiki User
∙ 11y ago
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How do builders describe the insulation ability of a material?
Usually it's the conductivity of a material that is given, measured in Watts per square metre. The more conductive, the lower the insulation. If a wall or material has a low conductivity, then is is a good insulator. It's a measure of how much heat energy the material will pass.
Light travels faster in a material with a lower index of refraction.?
true
What happens when light passes into a material where the speed of light is lower?
It moves at a slower speed!
What happens when a light moves from a material with a lower index of refraction to another material with a higher index of refraction?
The ray of light bends towards the normal.
Which is best copper or zinc?
copper and zinc both are conductive materials but as copper is in lower position than zinc in electromotive charts zinc is more than copper but other material properties like corrosive force,strength are better for copper. so for daily use copper is better than zinc.
Is a material with a lower R-value is a better insulator?
Higher
A material with a higher or lower R-value is a better insulator?
Higher
Is cottom wool a good insulator?
Cotton wool has a very low density and has thousands of pockets to trap air in. Because of this, cotton wool is a good insulator, but there are others that are better. As a rule of thumb, the lower the density, the better the insulator. There are virtually no exceptions to this.
Is glass or metal a better conductor?
Glass has a higher conductivity than thin plastic but,it is still lower than metal so metal may be a better conductor
How do builders describe the insulation ability of a material?
Usually it's the conductivity of a material that is given, measured in Watts per square metre. The more conductive, the lower the insulation. If a wall or material has a low conductivity, then is is a good insulator. It's a measure of how much heat energy the material will pass.
Is Wood a good heat insulator?
noansw2. Well, for lower temperatures, well removed from the ignition point of wood, it is quite a suitable thermal insulator.
What functions as a heat insulator?
Many materials, styrofoam is a common one. Even air can be used to insulate heat. All materials have a thermal conductivity, in the unit Watts/meter*Kelvin. The lower the number, the less heat it transfers. So technically any material is an insulator, there are just very good ones and very poor ones.
What materials cardboard or bubble wrap help ice from melting and what experiment can you do to prove this?
The material with lower thermoconductivity must work better. The bubble wrap in this case is a better choice.
Would you set the jigsaw at a high or a low speed to cut a hard material?
A lower speed is better for hard material. Of course a suitable blade with more, smaller teeth is also necessary .
What is thermal risistance?
Thermal resistance is a measure of a material's ability to resist the flow of heat through it. It is used to quantify how well a material can insulate against heat transfer. A lower thermal resistance value indicates better thermal insulation properties.
Why do companies locate abroad?
Lower labour costs. Lower tax rates. Lower raw material cost.
With the mean absolute percentage error is a higher or lower number better?
The lower the better
