Which among the following is true for propagation of sound waves?
Sound can travel in vacuum and it is a transverse wave in air.
Sound cannot travel in vacuum and it is a longitudinal wave in air.
Sound can travel in vacuum and it is a longitudinal wave in air.
Sound cannot travel in vacuum and it is a transverse wave in air.
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy