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What is the mass of a sample aerogel?
That's going to depend on the size of the sample you have. A larger sample will have more mass than a smaller sample, much like virtually every other known substance. Aerogel is a synthetic porous material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density and thermal conductivity. It is nicknamed frozen smoke, solid smoke, solid air or blue smoke owing to its translucent nature and the way light scatters in the material; however, it feels like expanded polystyrene (styrofoam) to the touch. Various samples of aerogel may have densities anywhere between 1 mg/cm3 (less dense than air) to 2 mg/cm3 .
A magnetic material has a relative permeability of 10000 what does this mean?
The relative permeability of 10,000 means that the material can support a magnetic field 10,000 times more dense than than a magnetic field in free space.
What does times more mean?
Three times more is NOT defined as "triple". Rather it is "triple more". Three times MORE than 4 is NOT 12. Three times AS MUCH as 4 is 12. Three times MORE than 4 is 12 more than 4, which is 16.
How many times more is hundred thousands then ten thousands?
10 times more. A hundred of anything is 10 times more than 10 of the same thing.
What is the density if the volume of a body is 45cc and mass is 180 kg?
Density = Mass/Volume = 180/45 = 4 kg per cc. That is very dense material - more than 180 times as dense as the densest element on earth - Osmium.
How do you do electrical treeing?
Electrical treeing is a phenomenon that occurs in insulating materials when exposed to high electrical stress over time, resulting in the growth of tree-like channels within the material. To induce treeing, high voltage is applied to the insulating material, creating localized breakdown regions that propagate through the material. Insulating materials with impurities, voids, or defects are more susceptible to treeing.
Why are Insulating materials contain spaces with air?
Insulating materials contain spaces with air because air is a poor conductor of heat compared to solid materials. These air pockets help to reduce heat transfer through conduction and convection, making the insulating material more effective at keeping warmth in or out.
What are some of the least dense materials?
Pentane is 0.626 g/cm^3 at 25 C and one atmosphere. Hydrogen is 0.070 g/cm^3 at -253 C and one atmosphere.Read more: What_is_the_lowest_density_liquid_commonly_availablei did not wright this!
Which is better heat insulating material PVC sheet or glass wool?
Glass wool is generally considered a better heat insulating material compared to PVC sheet. Glass wool has higher thermal resistance and is more effective in retaining heat due to its fibrous structure that traps air pockets. PVC sheet, on the other hand, is not as effective in insulating against heat due to its lower thermal resistance and poor heat retention properties.
What material is harder than a metal more than 3 times and more?
steel
What is the mass of a sample aerogel?
That's going to depend on the size of the sample you have. A larger sample will have more mass than a smaller sample, much like virtually every other known substance. Aerogel is a synthetic porous material derived from a gel, in which the liquid component of the gel has been replaced with a gas. The result is a solid with extremely low density and thermal conductivity. It is nicknamed frozen smoke, solid smoke, solid air or blue smoke owing to its translucent nature and the way light scatters in the material; however, it feels like expanded polystyrene (styrofoam) to the touch. Various samples of aerogel may have densities anywhere between 1 mg/cm3 (less dense than air) to 2 mg/cm3 .
Why would air add to the insulating ability of fiberglass?
Air is a poor conductor of heat, so the pockets of air trapped within fiberglass act as an insulating barrier, reducing heat transfer. The air pockets help slow down the movement of heat through the material, making fiberglass more effective at maintaining indoor temperatures.
Why is polystyrene useful as a clothing material?
Polystyrene is not typically used as a clothing material due to its characteristics. Polystyrene is more commonly known for its use in packaging and insulation due to its lightweight and insulating properties, rather than in the clothing industry.
How would the insulating properties of a jacket change if the insulation material in the jacket becomes wet?
When the insulation material in a jacket becomes wet, it loses its ability to trap air effectively, which significantly reduces its insulating properties. Wet insulation also conducts heat more easily, leading to a decrease in the overall warmth provided by the jacket. Additionally, moisture in the insulation can make the jacket heavier and more uncomfortable to wear.
How does humidity or wetness affect a materials ability to insulate?
Humidity or wetness can reduce the insulating ability of some materials by filling air pockets within the material with water, which conducts heat more effectively than air. Additionally, water can increase thermal conductivity, leading to faster heat transfer through the material. Wet or humid conditions can also degrade the structure of some insulating materials, further reducing their effectiveness.
How does combining materials affect conductivity?
Combining materials can affect conductivity by creating interfaces within the material that hinder electron flow. For example, mixing a conductive material with an insulating material can reduce conductivity due to disruptions in the electron pathway. Conversely, combining multiple conductive materials can enhance conductivity by creating more pathways for electron movement.
Many insulating materials contain spaces filled with air because air is what type of material?
Some insulating materials contain a small air space because air itself is a good insulator. Because their are few molecules in air compared to the same volume of solid, it takes longer for the heat to be transferred through the layer of air. Thus, air is a cheap and lite insulator.
