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At what temperature (in degree celsius), the numerical values on Celsius and Fahrenheit scales become equal? कस तापमान (डी सेिसयस म) पर सेिसयस तथा फ़ारेनहाइट केल पर अंकय मान समान हो जातेह? Options: 1) –40 2) 40 3) 273 4) –273

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Who discovered X-rays? X िकरण की खोज िकसनेकी थी? Options: 1) W. C. Roentgen डू. सी. रॉटजन 2) Albert Einstein अटआइंीन 3) Samuel Cohen सैमुएल कोहेन 4) Edward Taylor एडवडटेलर

Correct Answer: W. C. RoentgenWilhelm Conrad Roentgen. Wilhelm Roentgen, a German professor of physics, was the first person to discover electromagnetic radiation in a wavelength range commonly known as X-rays today. Although, many people had observed...Read more

Which of the following represents the most complex trophic level? िनिलखत मसेकौन जिटल पौिकता र को दशाता है? Options: 1) Community समुदाय 2) Population जनसंा 3) Ecosystem पारथितक तं 4) Species जाितयाँ

Correct Answer: EcosystemThe trophic level of an organism is the position it occupies in a food chain. The word trophic derives from the Greek(trophē) referring to food or nourishment. A food chain represents a succession of organisms tha...Read more