A man rows to a place 42 km away and comes back to the starting point. If the speed of the stream is 2 km/hr and the speed of the boat in still water is 5 km/hr. Then what is the total time taken by him?
=> 42/(5 + 2) + 42/(5 - 2) => 6 + 14 = 20 hrs
The _________ property of the element is a whole number.
______ is defined as the number of moles of solute per litre of solution.
Which material is used as a moderator in a nuclear power plant that slows down the neutrons and makes them fit for causing fission?
What property is shared by isotopes of an element?
Protons were discovered by
The slow corrosion of iron in the presence of moist air is known as:
The heating element in an electric heater is made of which element?
Evaluate these statements regarding calcium carbide's effects and uses:
Statement (I): Calcium carbide releases acetylene gas.
Statement (...
Cinnabar is an ore of which metal?
Which mineral is also known as 'plumbago'?
