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Explain the Air Resistance
If you drop a feather and a cannonball at the same time from the same height, which will hit the ground first? The cannonball of course. Why does the feather take longer? For its mass it has much more surface area bouncing against air molecules than the cannonball. Air resistance slows it down. If we did the same experiment on the moon (no air) what would happen? They would hit at the same time. Can you think of some ways we use air resistance? Parachutes are one way, by dramatically increasing your area with the parachute, you can slow yourself down to a speed where you can land without injury.
Chemical action in lead acid battery: When the lead acid battery is delivering current, the sulphuric acid breaks up into Hydrogen ions (H 2 ) carrying a positive charge and Su
#how does multihance work in mra and how does it improve mri image quality?question..
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