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In: Physics

8. An ice cube (formed by pure water) floats on salt water. The specific gravity of...

8. An ice cube (formed by pure water) floats on salt water. The specific gravity of salt water is 1024. Calculate the percent of the submerged volume.

9. A house has a roof with 100,000 N of weight and 12 m^2 of rectangular area. The pressure on the outside of the house is 0.95 atm. What minimum pressure is required inside the house to raise the roof?

10. A cylinder has a height of 1.80 meters and its circular caps have a diameter of 0.32 meters. The cylinder has a mass of 130 kg. Determine the density of the cylinder.

Solutions

Expert Solution

(8) volume of immersed part of ice/Total Volume of ice=density of ice /density of sea water

-------------------------------(1)

density of ice can be taken as approximately equal to water density

specific gravity of sea water

so from equation(1)

--------------------------------------------------------------------------------------------------

(9) The minimum force required to raise the roof will be equal to the weifgt of roof i.e. 100000N

Let required inside pressure=P

force exerted by inside pressure to the roof-

pressure exerted from outside=0.95 atm=0.95x1.01x10⁵ =9.595x10⁴ pascal

Force exerted by outside pressure to the roof-

atm-m²

Now-

--------------------------------------------------------------------------------------------------------------------------------------------------

(10)volume of cylinder-

density-

genius_generous answered 1 year ago

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