Which one of the following statements about the speed of sound waves is not correct?
The speed of sound waves in steel is higher than that in water.
The speed of sound waves in air decreases with increase in temperature.
The speed of sound waves in air increases with increase in temperature.
The speed of sound waves in water is higher than that 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