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hjlf
2 years ago
8

a swimmer experiences a total (absolute) pressure of 117,500 pa in a pool. how far below the surface are they located?

Physics
1 answer:
marta [7]2 years ago
4 0

Answer:

Explanation:

We know that the pressure can be calculated in the following way:

p = d·g·h

with d being the density of the water, g the gravitational acceleration and h the depth.

Also d of the water = 1000 kg/m^3 circa and g = 9.8 m/s^2 circa

117,500 Pa = 1000kg/m³ · 9.8m/s² · h

Therefore h = 11,9 m

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Answer:

420J

Explanation:

Power is the time rate of change in energy. Power is the ratio of energy to time. The S.I unit of power is in watts.

Given that the flash lasts for 1/675 s, power output is 2.7 * 10⁵ W. Hence:

Power = Energy / time

Substituting:

2.7 * 10⁵ W = Energy / (1/675)

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Since the conversion of electric energy to light is 95% efficient, hence the energy stored as electrical energy is:

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2 years ago
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3 years ago
Viewed from a distance, how would a flashing red light appear as it fell into a black hole?.
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Light rays that pass close to the black hole get caught and cannot escape. so what ends up happening to the light is that it starts bending due to the strong gravitational force of the black hole.

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2 years ago
Betty drew the life cycle of a butterfly for a science exhibition. The life cycle showed the various stages of growth before the
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 <span>If 1 eighth equals 1 billion 7 eighth equals 7 billion. 

The asker of the second question needs a tutorial in radiometric dating. There is little likelihood that the daughter isotope has the same atomic weight as the parent isotope. To measure the mass isotopes doesn't tell us how many atoms of each exist. To get around that let's pretend — which will likely serve the purpose ineptly intended — that the values give an the particle ratio, 125:875. 

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