Air blows from one place to another because gases move from high-pressure areas to low-pressure areas
In simple words
it happens because of pressure differences.
Good afternoon.
We have:

The function of velocity:

For
t = 5 s:
The size has gotten smaller, they last longer, easier to carry around, safer, etc
Answer:
55%
Explanation:
take efficiency=power output/power input multiply by 100%
I didn’t know water has calories