Related Questions

Although sunlight appears white, ____is actually a combination of all the colours of the spectum.
A that it
B because it
C it
D he
How many 3 digit integers can be chosen such that none of the digits appear more than twice, none of the digits equal 0?
A 729
B 720
C 756
D 504
`None but Allah can help us' What kind of Pronoun ' None' is-
A Reflexive
B Indefinite
C Reciprocal
D Demostrative
None but Allah can help us, what kind of pronoun 'None' is?
A Relative
B Reciprocal
C Indefinite
D Reflexive
Which of the following absorbs the insolation from the sun and preserves the earth's radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?
A Dust
B Water vapour
C Ozone
D Nitrogen
As an atom absorbs energy, ........ increases and the atom is said to be excited.
A as its energy level
B it is energy level
C the energy level of it
D the energy level
As an atom absorbs energy , ................. increases, and the atom is said to be excited .
A its energy level
B as its energy level
C it is energy level
D the energy level of its
As an atom absorbs energy,_____ increases, and the atom is said to be excitef
A its energy level
B as its energy level
C it is energy level
D the energy level of its
একটি কার্নো ইঞ্জিন 237°C এবং 139°C তাপমাত্রায় কার্যরত। উচ্চ তাপমাত্রায় এটি যদি 2.54 x 106 J তাপ শোষন করে, প্রতি সাইকেলে ইঞ্জিনটি কি পরিমান কাজ করছে ? (A Carnot engine operates between 237°C and 139°C. If it absorbs 2.54 x 106 J heat at high temperature, how much work is done by the engine per cycle?)
A  50.4 x 104 J  
B 450 kJ  
C 4.8 x 104 J  
D 488 kJ 
E  6.04 x 105 J
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
A Hydrogen
B Carbon dioxide
C Ozone
D None of these

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