Question
Describe how drying of food grains is done.
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Write down three unique characteristics of storage structure.
| Time in seconds | Distance in metres |
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 27 |
| 4 | 64 |
| 5 | 125 |
| 6 | 216 |
| 7 | 343 |
A bat can hear sound at frequencies up to 130kHz. What is the wavelength of sound? (Speed of sound is 344ms-1 in air)
What happens to the speed of sound when it goes from solid to gaseous state?
Why would an aircraft be unable to fly on the moon?