A hot air balloon pilot wants the balloon to quickly rise several feet higher so it will be above some trees in the distance. Wh
2 answers:
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Answer:
- the bucket-surface area vector and the direction of the rain is 180° which gives a negative flux in the outward direction.
- If we cut the base of the bucket then hold it in the rain then the there is no area intercepted by the rainfall and hence we have a zero flux.
Explanation:
We know that flux is defined as the density of any energy field passing through a given area parallel to the area vector.
Mathematically:
where:
flux through the area
area of concern
density of energy field per unit area
angle between the energy field lines and the normal to area.
When we hold a bucket in the rain then assuming that the base of the bucket is normal to the direction of rainfall then the angle between the area vector and the rain drop is zero when observed from inside.
- For the flux outside the bucket we are concerned with the outer surface of the bucket, now the angle formed between the bucket-surface area vector and the direction of the rain is 180° which gives a negative flux in the outward direction.
- If we cut the base of the bucket then hold it in the rain then the there is no area intercepted by the rainfall and hence we have a zero flux.