Suppose the cylindrical conductor of Fig. $28-11 \mathrm{a}$ has a concentric cylindrical hollow cavity inside it (so it looks like a pipe). What can you say about $\overrightarrow{\mathbf{B}}$ in the cavity?

A rigid pipe $4 \mathrm{~km}$ long and $12 \mathrm{~cm} /$ in diameter discharges water $\left(\rho=1000 \mathrm{~kg} / \mathrm{m}^3\right)$ at the rate of $0.03 \mathrm{~m}^3 / \mathrm{s}$. If a valve at the end of the pipe is closed in $3 \mathrm{~s}$, what is the maximum force that will be exerted on the valve as a result of the pressure rise? Suppose that the water temperature is $10^{\circ} \mathrm{C}$.

The $10 \mathrm{~cm}$ galvanized-steel pipe is $1000 \mathrm{~m}$ long and discharges water into the atmosphere. The pipeline has an open globe valve and four threaded elbows; $h_1=3 \mathrm{~m}$ and $h_2=15 \mathrm{~m}$. What is the discharge, and find the pressure at $A$, the midpoint of the line?

Write the missing digit to make each number divisible by 9. 1?,111

A pressure drop of $0.07 \mathrm{~psi}$ occurs over a section of $0.8-\mathrm{in}$.-diameter pipe transporting water at $70^{\circ} \mathrm{F}$. Determine the length of the horizontal section if the Reynolds number is $1600$ . Also, find the shear stress at the wall and the friction factor.

Find the indicated term of the geometric sequence (a) using the table feature of a graphing utility and (b) algebraically. $a_{1}=7, r=\sqrt{2},$ 14th term.

Find the slope of the graph of the function at the given point. Use the derivative feature of a graphing utility to confirm your results. y=5√(3x+4x) , (2, 2)

Draw a vertical line between the complete subject and the complete predicate. The Vikings often buried their wealthy deceased in ships under water.

As used in line 16, dormant most nearly means

A. peaceful.

B. asleep.

C. unused.

D. boisterous.

E. popular.

The cross-sectional area of a column of water in a vertical pipe is  $0.32 \mathrm{~m}^2$, and the weight is $680 \mathrm{~N}$. What is the difference in pressure (in Pa) between the pipe's top and bottom?

Show that the power needed to drive a fluid through a pipe with uniform cross-section is equal to the volume rate of flow, $Q$, times the pressure difference, $P_1-P_2$. Ignore viscosity.

Gasoline is piped underground from refineries to major users. The flow rate is $3.00 \times 10^{-2}\ \mathrm{m}^{3} / \mathrm{s}$ (about 500 gal/min), the viscosity of gasoline is $1.00 \times 10^{-3}\left(\mathrm{N} / \mathrm{m}^{2}\right) \cdot \mathrm{s},$ and its density is $680\ \mathrm{kg} / \mathrm{m}^{3}.$ (a) What minimum diameter must the pipe have if the Reynolds number is to be less than 2000? (b) What pressure difference must be maintained along each kilometer of the pipe to maintain this flow rate?

Two pipes A and B can fill a tank in 24 minutes and 32 minutes, respectively. Initially, both pipes are opened simultaneously. After how many minutes should pipe B be turned off so that the tank is full in 18 minutes?

Steam enters a 1.6-cm-diameter pipe at 80 bar and $600^{\circ}$C with a velocity of 150 m/s. Determine the mass flow rate, in kg/s.