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Andrews [41]
3 years ago
9

To meet the minimum required instrument flight experience to act as a pilot in command of an aircraft under IFR, you must have l

ogged within the preceding 6 calendar months in the same category aircraft:_______. six instrument approaches,
A) holding procedures, intercepting and tracking courses through the use of navigation systems.
B) three of which must be in the same category and class of aircraft to be flown, and 6 hours of instrument time in any aircraft.
C) and 6 hours of instrument time in any aircraft.
Physics
1 answer:
lora16 [44]3 years ago
6 0
I think its a tbh bc it seems to be the best answer out of a b c and d
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Answer:

Should be B

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Glycerin is poured into an open U-shaped tube until the height in both sides is 20cm. Ethyl alcohol is then poured into one arm
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Answer:

7.5 cm

Explanation:

In the figure we can see a sketch of the problem. We know that at the bottom of the U-shaped tube the pressure is equal in both branches. Defining \rho_A: Ethyl alcohol density and \rho_G: Glycerin density , we can write:

\rho_A\times g \times h_1 + \rho_G \times g \times h_2 = \rho_G \times g \times h_3

Simplifying:

\rho_A\times h_1 = \rho_G \times (h_3 - h_2) (1)

On the other hand:

h_1 + h_2 = \Delta h + h_3

Rearranging:

h_1 - \Delta h = h_3 - h_2 (2)

Replacing  (2) in (1):

\rho_A\times h_1 = \rho_G \times (h_1 - \Delta h)

Rearranging:

\frac{h_1 \times (\rho_A - \rho_G)}{- \rho_G} = \Delta h

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\frac{20 cm \times (0.789 - 1.26) \frac{g}{cm^3}}{- 1.26\frac{g}{cm^3}}  = \Delta h

7.5 cm =  \Delta h

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