The density of oil is water yet a loaded oil tanker sits lowerin the water than an empty one

(III) Estimate the diameter of a steel needle that can just barely remain on top of water due to surface tension.

Rino wants a high speed of water when it flows out from his pipe. The rate of water flows from his pipe now is about 10 m/s. (i) If he wants the rate of water flows two times from his rate of water flows now, determine the diameter of the other end of the pipe should he changes. Given the radius of his pipe is 2.0 m. (ii) With the fast rate of water flows that he has now, determine the volume of water that he can have in 10 minutes.

(III) A 3.65-kg block of wood (SG=0.50) floats on water. What minimum mass of lead, hung from the wood by a string, will cause the block to sink?

Your friend of mass 100 kg can just barely float in freshwater. Calculate her approximate volume.

18. (II) Water and then oil (which don't mix) are poured into a U- shaped tube, open at both ends. They come to equilibrium as shown in Fig. 10–50 O. What is the density of the oil? [Hint: Pressures at points a and b are equal. Why?] 8.62 cm Oil 27.2 cm a b Water Figure 10-50 Problem 18.

Two identical buckets are filled to the brim with water, but one of them has a piece of wood floating in it. Which bucket of water weighs more? Explain.