Bats can ascertain distances, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted:
ultrasonic waves from the bat
ultrasonic waves from the distant objects
supersonic waves from the bat
supersonic waves from the distant objects
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