This nozzle bends the flow from vertically upward to 30 with the horizontal and discharges water ( = 62.4 lbf/ft 3 ) at a speed of V = 130 ft/s. The volume within the nozzle itself is 1.8 ft 3 , and...

The flow-metering device shown consists of a stagnation probe at station 2 and a static pressure tap at station 1. The velocity at station 2 is 1.5 times that at station 1. Air with a density of 1.2...

The rectangular channel shown is 1.2 m wide. What is the discharge in the channel? Vertical depth = 1m 1/3 u = y"3 m/s Water 30

Water enters the lock of a ship canal through 180 ports, each port having a 2 ft by 2 ft cross section. The lock is 900 ft long and 105 ft wide. The lock is designed so that the water surface in it...

Is the tank in the figure filling or emptying? At what rate is the water level rising or falling in the tank? 6 ft diameter 3 in. diameter 4 in. diameter V= 4 ft/s Water V= 10 ft/s 6 in, diameter V =...

In the flow through an orifice shown in the diagram, theflow goes through a minimum area downstream of the orifice. This is called the vena contracta. The ratio of the flow area atthe vena contracta...

A boat is held stationary by a cable attached to a pier. A firehose directs a spray of 5C water at a speed of V = 50 m/s. If the allowable load on the cable is 5 kN, calculate the mass flow rate of...

The cube shown weighing 110 N and measuring 39 cm on a side is allowed to slide down an inclined surface on which there is a film of oil having a viscosity of 102 N s /m 2 . What is the velocity of...

A rotameter operates by aerodynamic suspension of a weight in a tapered tube. The scale on the side of the rotameter is calibrated in scfm of airthat is, cubic feet per minute at standard conditions...

Determine the standard heat of each of the following reactions at 25C: (a) N 2 (g) + 3H 2 (g) 2NH 3 (g) (b) 4NH 3 (g) + 5O 2 (g) 4NO(g) + 6H 2 O(g) (c) 3NO 2 (g) + H 2 O(l) 2HNO 3 (l) + NO(g) (d)...

Rationalize the following rule of thumb, appropriate for an equimolar binary liquid mixture: GE (equimolar) RT 1

Air enters a gas-turbine engine (see Fig. 8.11) at 305 K and 1.05 bar and is compressed to 7.5 bar. The fuel is methane at 300 K and 7.5 bar; compressor and turbine efficiencies are each 80%. For one...

Four components A, B, C, and D are placed in parallel to make a subassembly in a circuit board. The reliabilities of A, B, C, and D are 0.93, 0.88, 0.95, and 0.92, respectively. Find the reliability...

A remote control unit has 40 components in series. The reliability of each component is 0.9994. What is the reliability of the remote control unit? If a redesign has 25 components in series, what is...

Consider a chloroform(1)/tetrahydrofuran(2) mixture with x 1 = 0.80, initially at 70C and 120 kPa. Describe the evolution of phases and phase compositions as the temperature is gradually increased to...

Consider a binary liquid mixture for which the excess Gibbs energy is given by G E /RT = Ax 1 x 2 . What is the minimum value of A for which liquid/liquid equilibrium is possible? To the xy diagram...

An electronic component in a video recorder has an exponential time-to-failure distribution. What is the minimum mean time to failure of the component if it is to have a probability of 0.92 of...

Consult your reference library and find another explanation of hole versus electron flow. Using both descriptions describe in your own words the process of hole conduction.

Determine the output voltage for the circuit of Fig. 11.52. Fig. 11.52 330 k2 470 k2 33 ka V1 12 mV 47 k2 V. 47 ka 18 mV

a. Find the value of R S to obtain a voltage gain of 2 for the network of Fig. 8.74 using r d = . b. Repeat part (a) with r d =30 k . What was the impact of the change in r d on the gain and the...

Determine and V G for a PUT with V BB = 20 V and R B1 = 3R B2 .

Following are VLE data for the system acetonitrile(1)/benzene(2) at 45C: The data are well correlated by the three-parameter Margules equation (see Prob. 13.37). (a) Basing calculations on Eq....

For the network of Fig. 7.86 , V D = 12 V. Determine: a. I D . b. V S and V DS . c. V G and V GS . d. V P . o 20 V 2.2 k2 910 k2 Ipss = 10 mA %3D Vp = -3.5 V Vose 110 k2 1.1 k2 FIG. 7.85

What is the composition of the azeotrope for the ethanol(1)/ethyl acetate(2) system? Would this be called a high-boiling or low-boiling azeotrope? Problems 12.3 through 12.8 refer to the Pxy diagram...

a. Using the characteristics of Fig. 3.8, determine the resulting collector current if I E = 3.5 mA and V CB =10 V. b. Repeat part (a) for I E = 3.5 mA and V CB = 20 V. c. How have the changes in V...

Find V S for the network of Fig. 7.84 . 20 V 2.2 k2 Ipss = 4.5 mA Vp =-5 V Vps 0.68 k2 -4 V FIG. 7.83

Repeat Problem 26 if rd = 20 k and compare results. Problem 26 Repeat Problem 25 with the capacitor C S removed and compare results. Problem 25 Determine Z i , Z o , and V o for the network of Fig....

Using the characteristics of Fig. 3.13: a. Find the value of IC corresponding to V BE =750 mV and V CE = 4 V. b. Find the value of V CE and V BE corresponding to I C = 3.5 mA and I B =30 mA. tle (mA)...

For the network of Fig. 5.166 , determine A v . 8 V 3.6 k2 +6 V -10 V B= 75 Sas =5 uS 6.8 k2 4.7 k2 3.9 k2 a = 0.998 Bos = 10 S -5 V FIG. 5.165 FIG. 5.166

For the network of Fig. 5.163 : a. Determine Z i and Z o . b. Find A v . c. Calculate V o if Vi = 1 mV. Fig. 5.163 12 V B = 120 r, = 40 k2 Z 390 k2 5.6 k2 -8 V FIG. 5.163

For the network of Fig. 5.157 : a. Determine r e . b. Find the dc voltages V B , V CB , and V CE . c. Determine Z i and Z o . d. Calculate A v = V o > V i . V Z. B= 70 ro = 60 kn 24 V 3.3 kn 2.2 k 12...

a. Determine V DS for V GS = 0 V and I D = 6 mA using the characteristics of Fig. 6.11 . Fig. 6.11 b. Using the results of part (a), calculate the resistance of the JFET for the region I D = 0 to 6...

A 50-cm 30-cm 20-cm block weighing 150 N is to be moved at a constant velocity of 1.10 m/s on an inclined surface with a friction coefficient of 0.27. (a) Determine the force F that needs to be...

A 200-kg granite rock ( = 2700 kg/m 3 ) is dropped into a lake. A man dives in and tries to lift the rock. Determine how much force the man needs to apply to lift it from the bottom of the lake. Do...

A 78-percent-efficient 12-hp pump is pumping water from a lake to a nearby pool at a rate of 1.2 ft 3 /s through a constant- diameter pipe. The free surface of the pool is 32 ft above that of the...

A 2.4-in-diameter smooth ball rotating at 500 rpm is dropped in a water stream at 60F flowing at 4 ft/s. Determine the lift and the drag force acting on the ball when it is first dropped in the water.

A 7-ft-diameter spherical tank completely submerged in fresh water is being towed by a ship at 8 ft/s. Assuming turbulent flow, determine the required towing power.

The forming section of a plastics plant puts out a continuous sheet of plastic that is 1.2 m wide and 2 mm thick at a rate of 18 m/min. The sheet is subjected to airflow at a velocity of 4 m/s on...

In the metal processing industry, heat treatment of metals is commonly done using electrically heated draw batch furnaces. Consider a furnace that is situated in a room with surrounding air...

A turbine blade made of a metal alloy (k=17 W/mK) has a length of 5.3 cm, a perimeter of 11 cm, and a cross-sectional area of 5.13 cm 2 . The turbine blade is exposed to hot gas from the combustion...

For the common-base network of Fig. 4.138 Fig. 4.143 a. Using the information provided determines the value of R C . b. Find the currents I B and I E . c. Determine the voltages V BC and V CE . 9.1 ...

The in situ moisture content of a soil is 18%, and the moist unit weight is 105 lb/ft 3 . The specific gravity of soil solids is 2.75. This soil is to be excavated and transported to a construction...

Refer to Figure 12.43. Given that B = 1 m, L = 3 m, and Q = 110 kN, calculate the primary consolidation settlement of the foundation. 1.5 m 1.5 m 2.5 m FIGURE 12.43 Load = Q BXL Sand Clay (normally...

An earth dam section is shown in Figure 8.33. Determine the rate of seepage through the earth dam using Pavlovskys solution. Use k = 4 X 10 -5 mm/s. 3 m 32 m FIGURE 8.33 2.0 1 7 m Impermeable layer...

A zinc alloy has a SDAS of 0.01 cm and m = 0.40. What is the solidification time?

What is the tempering of steels? Why is tempering necessary?

Where is B/t nonzero, in Figure 7.21(b) ?Exploit the analogy between Faradays law and Ampres law to sketch (qualitatively) the electric field. B (in) (a) B (in) (b) changing magnetic field FIGURE...

Two positive point charges, qA and qB (masses mA and mB) are at rest, held together by a massless string of length a. Now the string is cut, and the particles fly off in opposite directions. How fast...

Learning math Developers of a new math curriculum called Accelerated Math compared performances of students taught by their system with control groups of students in the same schools who were taught...

A magnetic disk drive requires a motor to position a read/write head over tracks of data on a spinning disk, as shown in Figure E4.4. The motor and head may be represented by the transfer function...

Repeat 1.3-10 but use the method of sections to find member forces in AB and DC. (a) Find reaction force components B x , Bz , and O z . (b) Find the axial force in truss member AC. Problem 1.3-10...

Resolve the force F 2 into components along the and axes and determine the magnitudes of the components. 75 30 30 F = 6 kN V F = 4 kN

Determine the magnitude and direction of the resultant force. 250 N T 30 400 N 300 N X

The 80-ft-long cable is attached to the boom at A. If x = 60 ft. determine the coordinates y and z to the end of cable B. Take z = 3y. A Z B Probs. 2-93/94 -y

A sandwich beam having steel faces enclosing a plastic core is subjected to a bending moment M = 5 kN m. The thickness of each steel face is t = 3 mm with a modulus of elasticity E s = 200 GPa. The...

The 500-lb force is to be resolved into two components acting along the axis of the struts AB and AC. If the component of force along AC is required to be 300 lb, directed from A to C. determine the...

Determine the maximum weight of the crate that can be suspended from cables AB, AC, and AD so that the tension developed in any one of the cables does not exceed 250 lb. X CGS 3 ft N 2 ft 3 ft- 36% B...

The sign has a mass of 100 kg with center of mass at G. Determine the x, y, z components of reaction at the ball-and socket joint A and the tension in wires BC and BD. y 1m 2 m 3D +FBDK A Z 2 m -1m....

The check valve is used to regulate pressure in the pipe. If the stiffness of the spring is k = 80 kN/m and its uncompressed length is 120 mm, determine the maximum pressure in the tank if the lever...

The assembly is used to support the 120-kg container having a center of mass at G. If the spring has an upstretched length of 250 mm and stiffness of k = 300 kN/m, determine its height h and the...

Calculate the tension in the cable at B required to support the load of 200 kg. The cable passes over a frictionless pulley located at C. Neglect the size of this pulley and weight of the boom. 60 B...

The 10-kg uniform rod is pinned at end A. If it is subjected to a couple moments of 50 N m, determine the smallest angle for equilibrium. The spring is upstretched when = 0, and has a stiffness of...

The block has a mass of 80 kg and a center of mass at G. Determine the smooth reactions on the supporting platform at A, B, and C. 60 G. B 60 0.3 m -0.8 m

The davit is used to suspend the lifeboat over the side of a ship. If the boat exerts a force of 800 lb on the chain at D, determine the force acting on the hydraulic cylinder BC, and the horizontal...

Determine the stiffness k of each spring so that the 30-N force causes the bar to tip = 15 when the force is applied. Originally the bar is horizontal and the springs are upstretched. Neglect the...

Determine the moment of force F about an axis extending between O and A. Express the result as a Cartesian vector. X 0.6 m N 0.8 m F = {80i-40j - 120k} N 0.3 m -y

Determine the magnitude of the equivalent resultant force of the distributed loading and specify its location on the beam measured from point A. -4.5 ft- 2 kip/ft -6 ft- 1.5 kip/ft

Replace the force system acting on the beam by an equivalent resultant force and couple moment at point A. A B 30 in. 30 250 lb 12 in. to 16 in. 3 in. -10 in.- 14 in. 45 260 lb 13 12 5 300 lb

Determine the force required to hold the 50-kg mass in equilibrium. B C A B P 191

Determine the components of reaction E. A E -1.5 m- 4 kN/m D -1.5 m- Prob. F6-23 B 2m C 5 kN

Determine the zero-force members in the Pratt roof truss. Explain your answers using appropriate joint free-body diagrams. A B 300 N C 400 N D L K J E F I H 12 m, 6 @ 2 m- 3 m

Determine the greatest load P that can be applied to the truss so that none of the members are subjected to a force exceeding either 2 kN in tension or 1.5 kN in compression. A C 60 60 -3 m- Prob....

Determine the force in each member of the truss and state if the members are in tension or compression. Set P 1 = 200 lb, P 2 = 500 lb. 4 ft A -3 ft- B P - P -4 ft-

Determine the moment of each force about point A. Add these moments and calculate the magnitude and coordinate direction angles of the resultant moment. X 0.8 m F = {30i+20j - 30k} N A 1.20 m 0.4 m y...

Determine the moment about point O of each force acting on the pipe assembly. Add these moments and calculate the magnitude and coordinate direction angles of the resultant moment. 0.8 m Z F = {30i +...

Determine the magnitude of F so that the resultant couple moment acting on the beam is 1.5 kN m clockwise. FA 0.9 m 2 kN Prob. F4-22 B -F 0.3 m 2 kN

Determine the moment of the force F about point A as a function of . Plot the result of M (ordinate) versus (abscissa) for 0 < < 180. 8 ft- 2 ft F = 40 lb

The handle of the hammer is subjected to the force of F = 20 Ib Determine the moment of this force about the point A. 18 in. 30 5 in. B

Two men exert forces of F = 80 Ib and P = 50 Ib on the ropes. Determine the moment of each force about A. Which way will the pole rotate, clockwise or counterclockwise? 12 ft 6 ft A C

If F = {100i-120j +75k} lb and F = {-200i+ 250j + 100k} lb, determine the resultant moment produced by these forces about point O. Express the result as a Cartesian vector. 3 ft 4 ft 5 ft F -y

Determine the moment of each of the three forces about point B. F = 250 N 30% A -2 m -3 mr B F2 = 300 N 60 4 m F3 = 500 N

An infinitely long conductor of radius a carries a uniform current with J = J o a z . Show that the magnetic vector potential for r < a is A = 1 Hopa=

The members of a truss are pin connected at joint O. Determine the magnitude of and its angle for equilibrium. Set F 2 = 6 kN. 5 kN 7 kN 5 30 y 70 0 F F X

Determine the radiation efficiency of a half-wave dipole operating at 6 MHz. The wire is made of copper ( = 58 MS/m) and is 1.2 mm in radius.

A short dipole antenna operates at the AM broadcast band at 1.2 MHz. To achieve a radiation resistance of 0.5, how long must the antenna be?

Determine the moment of inertia of the composite area about the y axis. T 3 in. 3 in. y -3 in. 6 in.. X

Determine the coordinate direction angles of the force. 2 45 -30 F = 75 lb

Determine the resultant moment produced by the forces about point O. O -1m- 600 N -2 m 500 N 45 2.5 m 300 N

The hand clamp is constructed using a square-threaded screw having a mean diameter of 36 mm, a lead of 4 mm, and a coefficient of static friction at the screw of s = 0.3. To tighten the screw, a...

If a horizontal force of F = 50 N is applied perpendicular to the handle of the lever at E, determine the clamping force developed at G. The mean diameter and lead of the single square-threaded screw...

If it takes a vertical force of 60,000 lb to separate the two parts at A and C, determine the force P the hydraulic cylinder must exert on the wedge in order to push it forward. The coefficient of...

The load bar of negligible weight is screwed in place between the walls of the truck bed in order to keep loads from shifting. Determine the torsional moment M that must be applied to the center of...

Two blocks A and B, each having a mass of 6 kg, are connected by the linkage shown. If the coefficient of static friction at the contacting surfaces is s = 0.5 determine the largest vertical force P...

The uniform 5-kg rod rests on the ground at B and against the wall at A. If the rod does not slip at B, determine the smallest coefficient of static friction at A which will prevent slipping at A. X...

Two blocks A and B, each having a mass of 6 kg, are connected by the linkage shown. If the coefficients of static friction at the contacting surfaces are B = 0.8 and A = 0.2, determine the largest...

The uniform crate resting on the dolly has a mass of 500 kg and mass center at G. If the front casters contact a high step, and the coefficient of static friction between the crate and the dolly is ...

The bent rod is supported at A, B, and C by smooth journal bearings. Determine the magnitude of F which will cause the positive x component of reaction at the bearing C to be C x = 50 N. The bearings...

Determine the distance x to the center of gravity of the gas dehydrator assembly. The weight and the center of gravity of each of the various components are indicated. What are the vertical reactions...

A large stone having a mass of 500 kg is moved along the incline using a series of 150-mm-diameter rollers for which the coefficient of rolling resistance is 3 mm at the ground and 4 mm at the bottom...

The 5-kg skateboard rolls down the 5 slope at constant speed. If the coefficient of kinetic friction between the 12.5-mm-diameter axles and the wheels is k = 0.3, determine the radius of the wheels....