Which one of the following statements about X-rays is not true ?
They have wavelengths of about 1 Å.
These can be generated by bombarding a metal target by high energy electrons.
Due to their wavelengths being shorter, these can be used for radar systems.
These are also used for the treatment of certain forms of cancer.
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