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olga_2 [115]
2 years ago
15

Water flows through a horizontal pipe. The diameter of the pipe at point Bis larger than the diameter of the pipe at point A. Wh

ere is the speed of the water the greatest?
a. The speed of the water is the same at both points.
b. The speed of the water is the greatest at point A.
c. The speed of the water is the greatest at point B.
d. The speed of the water cannot be determined without additional information.
Physics
1 answer:
777dan777 [17]2 years ago
6 0
B. It is point A , the proof is in this photo if it’s wrong please correct me
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25000 seconds is how many days?
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A spherical balloon has a radius of 7.40 m and is filled with helium. Part A How large a cargo can it lift, assuming that the sk
malfutka [58]

Answer:

The mass of the cargo is M  =  188.43 \ kg

Explanation:

From the question we are told that

    The radius of the spherical balloon is  r =  7.40 \ m

     The mass of the balloon is  m = 990\ kg  

The volume of the spherical balloon is mathematically represented as

     V  =  \frac{4}{3} * \pi r^3

substituting values

      V  =  \frac{4}{3} * 3.142 *(7.40)^3

      V  =  1697.6 \ m^3

The total mass  the balloon can lift is mathematically represented as

     m =  V (\rho_h - \rho_a)

where \rho_h is the density of helium with a  value of

       \rho_h  =  0.179 \ kg /m^3

and  \rho_a is the density of air with a value of

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substituting values

          m =  1697.6 ( 1.29  - 0.179)

         m =  1886.0  \ kg

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        M  =  1886.0 - 1697.6

        M  =  188.43 \ kg

       

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