(Solved): answer with steps please 4) Why does an object float when submerged in fluid? a) Because it k ...

4) Why does an object float when submerged in fluid? a) Because it knows how to swim b) The density of the object is greater than the density of the fluid it is in c) The force of gravity is greater than the buoyant force d) The density of the object is less than the density of the fluid it is in 5) When an object is in a fluid the buoyant force is a) Equal to the force of gravity on the object b) Equal to weight of the object c) Equal to the weight of the container of fluid d) Equal to the weight of the water displaced by the object 5) Water at a gauge pressure of $3.8\mathrm{atm}$ at street level flows into an office building at a speed of $0.78\mathrm{m}/\mathrm{s}$ through a pipe $2.5\mathrm{cm}$ in diameter. The pipe tapers down to $1.4\mathrm{cn}$ diameter by the top floor, $16\mathrm{m}$ above, where the faucet has been left open. What is flow velocity at the top of the pipe? a) $2.5\mathrm{m}/\mathrm{s}$ c) $2.0\mathrm{m}/\mathrm{s}$ 9) $1.0\mathrm{m}/\mathrm{s}$