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3 years ago

Please help me with my physics! I do but understand and please provide explanation.

Physics

1 answer:

RUDIKE [14]3 years ago

6 0

The answer is A)100m : 0m
The pool is 50m long
so she swam from the two ends of the pool two times
so in total she swam 50x2 m which is 100m
and she she displaced no meters because she ended in the same point as where she started

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Answer:

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Solution:

As per the question:

Radius, r = 1 cm = 0.01 m

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Now,

By using the continuity equation:

Av = A'v' (1)

where

A = Area of the mouth

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v' = Velocity of the fluid inside the stomach

Since, the question assumes the stomach, mouth and esophagus as continuous vertical tube, then:

A = A'

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From eqn (1):

v = v' = 1.5 m/s

Now,

With the help of Bernoulli's equation:

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$P + \frac{1}{2}\rho v^{2} + \rho g(h - h') = P' + \frac{1}{2}\rho v^{2} +$

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where

h - h' = l = 60 am = 0.6 m

P = Pressure at mouth = 1 atm = $1\times 10^{5}\ Pa$

g = acceleration due to gravity

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Answer:

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