Science related general knowledge

science
what is the life span of Red Blood Cell (RBC)?
120 Days

what is the unit of upthrust?
Newton

what is the process by which the primary and secondary windings of a transformer are linked each other?
mutual induction


which gases are mixed to make urea?
Ammonia and carbondioxide 

which gas is used to make dry ice?
Carbondioxide(CO2)

which layer of atmosphere contains large amount of ozone gas?
Stratosphere

Which mirror is used to see back view of vehicles?
convex mirror

which lens is used to remove hypermetropia? 
convex lens

which lens is converging lens?
convex lens

which mirror is converging mirror?
concave mirror

which mirror is diverging mirror?
convex mirror

which lens is diverging lens?
concave lens

which blood cell is called leucosydes?
white blood cell (WBC)

How many valves are there in the human heart?
4

what is the fullform of LPG?
liquefied petroleum gas

Where are the red blood cells created?
b. bone marrow



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