The displacement of a particle is given by x = cos2ωt. The motion is
Which one among the following situations is best represented by the velocity – time plot shown above?
White light while passing through a glass prism breaks up into light of different colours because
Bats can know about their prey at a distance even in the night by emitting
The ceilings of a concert hall are generally curved
An electric heater is rated 1500 watt. If electric power costs Rs 2 per kilo-watt-hour, then the cost of power for 10 hours running of the heater is
