Batting practice in

In a cricket against Zimbabwa, Azhar wants to bat before jabeja and wants to bat before Ganguli. Number of possible batting orders with the above restrictions, if the remaining eight team members are prepared to bat any given place, is

A bat is flitting about in a cave, navigating via ultrasonic beeps. Assume that the sound emission frequency of the bat is 40kHz. During one fast swoop directly toward a flat wall surface. The bat is moving at 0.03 times the speed of sound in air. What frequency does the bat hear reflected off the wall ?

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Bats Using Ultrasonic Waves

Write flight adaptations in bats?