Author Question: All people come very close to being able to float in water. What therefore is the volume (in cubic ... (Read 175 times)

RYAN BANYAN · **on:** Jul 28, 2018

All people come very close to being able to float in water. What therefore is the volume (in cubic meters) of a 50-kg woman?
a. 0.007
b. 0.035
c. 0.050
d. 0.070
e. 0.085

Question 2

Melanie says that when a diver enters an underwater cave of height h, the pressure on her is no greater than rWgh. Rosalind says that if the bottom of the cave is a distance H below the water surface, the pressure on the soles of the diver's feet can reach rWgH. Which one, if either, is correct? (The density of water is rW.)
a. Melanie, because the roof of the cave absorbs the water pressure from above. b. Melanie, because only the fluid directly above any volume of the fluid can contribute to the pressure on that volume. c. Rosalind, because a fluid exerts equal pressure in all directions at a given depth.
d. Rosalind, because the pressure also depends on the density, rc, of the material above the cave roof, so that p = rcg(H - h) + rWgh.
e. Melanie, because the pressure equals p = rWgH - rcg(H - h).