Question
How does a boat float in water?
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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340m s–1, calculate
A boy weighing 50kg climbs up a vertical height of 100m. Calculate the amount of work done by him. How much potential energy does he gain? (8 = 9.8m/s2).
What are tracheary elements? Describe their functions.
The audible range of frequencies of an average human ear is from 20Hz to 20kHz. Calculate the corresponding wavelengths. (Speed of sound in air is 344ms-1).