Let the speed of the man be ‘x’ m/sec. Speed of train = 1440/24 = 60 m/sec Relative speed of the train = (60 – x) m/sec According to the question, => (60 – x) = 1440/30 => x = 60 – 48 => x = 12 Therefore the speed of the man = 12 m/sec
Aqua regia, which can dissolve gold, is a freshly prepared mixture of concentrated hydrochloric acid and concentrated ______.
Pentane has _____ structural isomers.
Amalgam is a mixture of
Protons were discovered by
Which material is commonly used for making casts and sculptures?
The important ore of aluminium is-
What is the chemical formula of bleaching powder?
Another name of Carborundum is
Ultra-purification of metals is achieved using:
An element has an atomic number of 17 and a mass number of 36. How many neutrons are in its nucleus?
