True or false? european airlines are mostly privatized.
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Ответ:
false
Explanation:
All but one U.S. commercial airport are owned and operated by public entities, including local, regional or state authorities with the power to issue bonds to finance some of their capital needs. Airports are landlords.
Ответ:
Explanation:
The pressure of an object is calculated as follows:![P = \frac{F}{A}](/tpl/images/0594/3100/943cf.png)
The area of test tube stopper is A= π![r^{2}](/tpl/images/0594/3100/0d015.png)
Since radius is half the diameter we have the following:
R =
= 0.60 cm
Thus the area of the test tube becomes:
A = π![( 0.60 Cm)^{2}](/tpl/images/0594/3100/15fe4.png)
= π![(0.006 m) ^{2}](/tpl/images/0594/3100/76c2a.png)
= 1.14 *![10^{-4} m^{2}](/tpl/images/0594/3100/03e29.png)
Now the force from the outside of the tube.
=![( 1.013 * 10^{5} Pa ) ( 1.14 * 10^{-4} m^{2} )](/tpl/images/0594/3100/e73f7.png)
= 11.55N
The net upward force on the stopper is equal to the difference of force exerted by pressure from inside of the tube and that from the outside.
= 23.1 N