For an ideal black body
(A) absorptivity = 1
(B) reflectivity = 1
(C) emissivity = 0
which is true???????
Answer Posted / virendra chauhan
Emmisivity=0
| Is This Answer Correct ? | 0 Yes | 3 No |
Post New Answer View All Answers
Explain what are the affinity laws associated with dynamics pumps?
Explain the factors involved in considering the choice of dry screw compressor?
What is a common failure mechanism for above ground atmospheric storage tanks?
Are there any special considerations to be taken into account for combusting ammonia?
solution =2oolitre ,solute =Polyelectrolyte,Solution=water ,we have to prepare 1% solution.how much solute And Solvent?
What are the some common causes of control valve noise?
What is the definition of 'good' cooling tower water?
When an expansion is joint needed on the shell side of a shell and tube heat exchanger?
What is the use of gear pumps in motor?
X is strong but has a very low density (1% of traditional earth materials.) and hence light weight. It is a recyclable material. The compression behaviour of X is strain rate dependent. Higher strain rates result in higher initial modulus and higher compression strength. It can also withstand unlimited number of cycling loading provided the repetitive loads are kept below 80% of the compressive strength. The internal structure of the material includes air-traps which make it poor heat conductor. X is non- biodegradable and chemically inert in both soil and water. Most acids and their water solutions do not attack it; however strong oxidizing acids do. Solvents which attack X include esters, ketones, ethers, aromatic and aliphatic hydrocarbons and their emulsions, among others. It does not support bacterial/fungal growth as well .It also has significant acoustic properties and effectively reduces the transmission of airborne sound. X is combustible and should not be exposed to open flame or other ignition sources. Combustion products are carbon monoxide, carbon dioxide, water and soot. Long-term exposure to sunlight causes yellowing and a slight embrittlement of the surface due to ultraviolet light. X is able to withstand the rigours of temperature cycling, assuring long-term performance.
For amonia manufacturing process if pressure, temperature would be increase over optimum level what would be happen?And what steps should be taken?
What kind of concerns is associated with temperature pinch points in condensers?
We have some pieces of metals that have been 'powder coated', how does that work?
Explain what are the advantages of using gear pumps?
What is an effective means of removing silicon from aluminum?