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A liquid refrigerant (sg = 1.08) is flowing at a weight flow rate of 28.5 N/h. Calculate the volume flow rate and the mass flow rate. Compute the time required to empty the tank shown in Fig. 6.14 if the original depth is 2.68 m. The tank diameter is 3.00 m and the orifice diameter is 150 mm. dh Table 6.2 lists the range of typical volume flow rates for pumps in industrial oil hydraulic systems to be 3 to 30 gal/min. Express this range in the units of ft 3 /s and m 3 /s. Flow rate (m/h) Type... A long DN 150 Schedule 40 steel pipe discharges 0.085 m 3 /s of water from a reservoir into the atmosphere as shown in Fig. 7.13. Calculate the energy loss in the pipe. Water at 40°F is flowing downward through the fabricated reducer shown in Fig. 7.11. At point A the velocity is 10 ft/s and the pressure is 60 psig. The energy loss between points A and B is 25... Benzene (sg = 0.86) at 60C is flowing at 25 L/min in a DN 25 Schedule 80 steel pipe. Is the flow laminar or turbulent? An engine crankcase contains SAE 10 motor oil (sg = 0.88). The oil is distributed to other parts of the engine by an oil pump through an 1/8-in steel tube with a wall thickness of 0.032 in. The ease... At approximately what volume flow rate will propyl alcohol at 77F become turbulent when flowing in a 3-in Type K copper tube? A system is being designed to carry 500 gal/min of ethylene glycol at 77F at a maximum velocity of 10.0 ft/s. Specify the smallest standard Schedule 40 steel pipe to meet this condition. Then, for... The range of Reynolds numbers between 2000 and 4000 is described as the critical region because it is not possible to predict whether the flow is laminar or turbulent. One should avoid operation of... Fuel oil (sg = 0.94) is being delivered to a furnace at a rate of 60 gal/min through a 1 -in Schedule 40 steel pipe. Compute the pressure difference between two points 40.0 ft apart if the pipe is... If the three bulbs of Prob. 2.59 are connected in parallel to the 120-V source, calculate the current through each bulb. Prob 2.59 An enterprising young man travels to Europe carrying three light... For the ladder network in Fig. 2.104 , find I and R eq . 82 62 15 V Rea From the circuit in Fig. 2.83 , find I, the power dissipated by the resistor, and the power supplied by each source. 10 V +. 12 V +. -8 V (+1) In the circuit of Fig. 2.75 , calculate V 1 and V 2 . V2 5 V V, (a) Obtain the voltage V o in the circuit of Fig. 2.127(a) . (b) Determine the voltage Vʹ o measured when a voltmeter with 6-kΩ internal resistance is connected as shown in... Apply nodal analysis to solve for V x in the circuit of Fig. 3.56 . V 302 0.05V, 2 A 60 2 Find V o and the power dissipated in all the resistors in the circuit of Fig. 3.60 . 12 6 Vo 60 V (+ 12 24 V (1+ The circuit in Fig. 2.134 is to control the speed of a motor such that the motor draws currents 5 A, 3 A, and 1 A when the switch is at high, medium, and low positions, respectively. The motor can be... Using nodal analysis, find v o in the circuit of Fig. 3.63 . 12.5 A 50 V Vo 100 V (+ For the circuit in Fig. 3.69 , find v 1 , v 2 , and v 3 using nodal analysis. 240 V (+- 201 V3 20 V2 1 40 40 10 Write the mesh-current equations for the circuit in Fig. 3.117. 10 10 10 V 1) 10 15 V (+ 10 10 V 10 10 (+ 10 4 10 10 15 V (+ 10 +) 10 V By inspection, write the mesh-current equations for the circuit in Fig. 3.116 . 20 www 40 V 15 30 b) 20 +, 14 20 V 20 10 Obtain v a in the circuit of Fig. 3.54 . 120 V +- 60 V 120 k2 120 k2 Vo 30 k2 For the circuit in Fig. 5.93 , find v o . 25 k2 100 k2 40 k2 20 k2 20 k2 10 k2 Vo +, 2 V 0+ Determine the Thevenin equivalent circuit, shown in Fig. 4.101 , as seen by the 7-ohm resistor. Then calculate the current flowing through the 7-ohm resistor. 13 60 7 30 240 V +, Use superposition to find V o in the circuit of Fig. 4.86 . 10 2 2 V. V. 102 ) 4 A +. The voltage waveform in Fig. 6.46 is applied across a 55-μF capacitor. Draw the current waveform through it. v (t) VA 10 12 t (ms) 6 8 10 2 4 -10 A 50-F capacitor has energy w(t) = 10 cos 2 377t J. Determine the current through the capacitor. Find the load voltage v L in the circuit of Fig. 5.98 . 100 k2 250 kO 20 k2 +. 2 k2 5.6 V Find the Norton equivalent at terminals a-b of the circuit in Fig. 4.119 . Vo- +. 10 20 2 V. A fish looking straight up toward the smooth surface of a pond receives a cone of rays and sees a circle of light filled with the images of sky and birds and whatever else is up there. This right... Convert 0.296 cm 3 /s to m 3 /s. Convert 0.105 m 3 /s to L/min. Convert 23.5 cm 3 /s to m 3 /s. Convert 84.3 gal/min to m 3 /s. Convert 3.58 10 -3 m 3 /s to L/min. Convert 5.26 10 -6 m 3 /s to L/min. Convert 459 gal/min to ft 3 /s. Convert 20 gal/min to ft 3 /s. Convert 2.50 gal/min to ft 3 /s. Convert 125 ft 3 /s to gal/min. Convert 0.060 ft 3 /s to gal/min. Convert 7.50 ft 3 /s to gal/min. Convert 0.008 ft 3 /s to gal/min. Figure 9.29 shows a system in which methyl alcohol at 77°F flows outside the three tubes while ethyl alcohol at 0°F flows inside the tubes. Compute the volume flow rate of each fluid required... Water at 90°F flows in the space between 6-in Schedule 40 steel pipe and a square duct with inside dimensions of 10.0 in. The shape of the duct is similar to that shown in Fig. 9.10. Compute the... Figure 9.14 shows a heat exchanger in which each of two DN 150 Schedule 40 pipes carries 450 L/min of water. The pipes are inside a rectangular duct whose inside dimensions are 200 mm by 400 mm.... Determine the pressure drop across a 90 standard elbow in a DN 65 Schedule 40 steel pipe if water at 15C is flowing at the rate of 750 L/min. Calculate the resistance coefficient K for a ball-type check valve placed in a 2-in Schedule 40 steel pipe if water at 100F is flowing with a velocity of 10 ft/s. For each contraction described in Problems 10.22 and 10.24, make a scale drawing of the device to observe its physical appearance. Figure 10.10 Figure 10.11 D1 0.4+ e - 150 0.3 120 105 0.2 90 70 0.1... For the data in Problem 10.22, compute the energy loss for gradual contractions with each of the cone angles listed in Figs. 10.10 and 10.11. Plot energy loss versus the cone angle. Figure 10.10... For the conditions in Problem 10.17, if the pressure before the contraction was 80 psig, calculate the pressure in the smaller pipe. In Problem Determine the energy loss when oil with a specific... Determine the energy loss for the conditions in Problem 10.6 if the cone angle is increased to 60. In Problem Determine the energy loss due to a gradual enlargement from a 25 mm OD 2.0 mm wall... A piping system for supplying heavy fuel oil at 25°C is arranged as shown in Fig. 10.35. The bottom leg of the tee is normally capped, but the cap can be removed to clean the pipe. Compute the... Compare the energy losses for the two proposals from Problem 10.43 with the energy loss for the proposal in Fig. 10.37. DN 50 Schedule 80 Standard elbow steel pipe Flow 700 mm 700 mm Determine the energy loss that occurs as 40 L/min of water at 10C flows around a 90 bend in a commercial steel tube having an OD of 20 mm and a wall thickness of 1.5 mm. The radius of the bend to the... For the data in Problem 10.47, compute the resistance factor and the energy loss for a coil of the given tube that makes six complete revolutions. The mean bend radius is the same, 2.00 in. In... A tube similar to that in Problem 10.47 is being routed through a complex machine. At one point, the tube must be bent through an angle of 145. Compute the energy loss in the bend. In Problem Compute... A 2-in plastic ball valve carries 150 gal/min of water at 150F. Compute the expected pressure drop across the valve. Water at 10C flows from a large reservoir at the rate of 1.5 10 -2 m 3 /s through the system shown in Fig. 11.13. Calculate the pressure at B. Analyze the system shown in Fig. 11.11 with kerosene at 20°C as the working fluid. Use PIPE-FLO ® software to determine the pressure at point B that results in a flow rate of 800 L/min.... Repeat Problem 11.43, except consider that there will be the following elements added to the system: A fully open gate value near the water main A fully open butterfly valve near the green (but... Repeat Problem 11.35, but consider the valve to be fully open. Repeat Problem For the system shown in Fig. 11.30, compute the volume flow rate of ethyl alcohol at 77°F that would occur if the... What force makes it possible for a car to move along a curved road? A straight, flat road? What is the acceleration of the Moon as it moves in its circular orbit around the Earth? TABLE 5.1 Solar System Data: Properties of Several Objects in the Solar System, Including the Planets and Two... The track near the top of your favorite roller coaster has a circular shape with a diameter of 20 m. When you are at the top, as in Figure 5.11, you feel as if your weight is only one-third your true... An RC circuit consists of a series connection of a 120-V source, a switch, a 34-M resistor, and a 15-F capacitor. The circuit is used in estimating the speed of a horse running a 4-km racetrack. The... Find v(t) for t > 0 in the circuit of Fig. 8.81 . t = 0 1H ll 4.5 A 6u(t) A 5 10 Obtain v(t) and i(t) for t > 0 in the circuit of Fig. 8.84 . 2 5H i(t) 10u(t) A 4 24 V v(t) 2 200 mF A person who is farsighted has her near point at 100 cm and her far point is where it should normally be. Determine the prescription for a contact lens that will fix the problem. Locate her new far... An optometrist finds that a farsighted person has a near point at 125 cm. What power will be required for contact lenses if they are effectively to move that point inward to a more workable distance... It is desired to operate a pump at 1750 rpm by driving it with a four-pole electric motor. For each of the following conditions, compute the specific speed using Eq. (1317). Then, recommend whether... Suppose you have a concave spherical mirror with a focal length of 10 cm. At what distance must an object be placed if its image is to be erect and one and a half times as large? What is the radius... A man whose face is 25 cm away looks into the bowl of a soup-spoon and sees his image reflected with a magnification of -0.064. Determine the radius of curvature of the spoon. A woman is standing 600 cm in front of a large flat vertical mirror. She sees the image of a tree 1200 cm from her face. Where is the actual tree located? Describe the image in detail. A blade of grass standing 10.0 mm tall is 150 mm in front of a thin positive lens having a 100 mm focal length; 250 mm behind that first lens is a thin negative lens with a focal length of -75.0 mm.... A candle flame is 18.0 cm in front of a thin positive lens. Its image appears three times farther away from the lens than if the same candle were on a very distant mountain. Determine the lenss focal... A meniscus concave glass (n l = 1.5) thin lens (see Fig. 5.12) has radii of curvature of +20.0 cm and +10.0 cm. If an object is placed 20.0 cm in front of the lens, show that the image distance will... In Section 5.4, we showed that the radius of a geosynchronous orbit about the Earth is 4.2 107 m, compared with the radius of the Earth, which is 6.4 106 m. By what factor is the force of gravity... Identify the static 1-hazards in the following circuit. State the condition under which each hazard can occur. Draw a timing diagram (similar to Figure 1-10(b)) that shows the sequence of events when... (a) Write a Verilog module for a LUT with four inputs and three outputs. The 3-bit output should be a binary number equal to the number of 1s in the LUT input. (b) Write a Verilog module for a... A sequential circuit has one input (X) and two outputs (Z 1 and Z 2 ). An output Z 1 = 1 occurs every time the input sequence 010 is completed provided that the sequence 100 has never occurred. An... A sequential circuit has one input (X) and two outputs (S and V). X represents a 4-bit binary number N, which is input least significant bit first. S represents a 4-bit binary number equal to N + 2,... Design the correction circuit for a BCD adder that computes Zdigit 0 and C for S 0 . This correction circuit adds 0110 to S 0 if S 0 > 9. This is the same as adding 0AA0 to S 0 , where A = 1 if S 0 >... (a) Implement the function F 1 = A'BC + B'C + ABC using an FPGA with programmable logic blocks consisting of 4-to-1 multiplexers. Assume inputs and their complements are available. (b) Implement the... A description of a 74194 4-bit bidirectional shift register follows. The CLRb input is asynchronous and active low and overrides all the other control inputs. All other state changes occur following... Design a sequential circuit to control the motor of a tape player. The logic circuit will have five inputs and three outputs. Four of the inputs are the control buttons on the tape player. The input... Obtain the Laplace transform of f (t) in Fig. 15.28 . f(t) A 15 1 2 3 4 t An older model Thunderbird car has three left (LA, LB, LC) and three right (RA, RB, RC) tail lights, which flash in unique patterns to indicate left and right turns. Design a Moore sequential circuit... A block diagram for a divider that divides an 8-bit unsigned number by a 4-bit unsigned number to give a 4-bit quotient is shown subsequently. The Xi inputs to the subtractors are shifted over one... This problem involves the design of a parallel adder-subtracter for 8-bit numbers expressed in sign and magnitude notation. The inputs X and Y are in sign and magnitude, and the output Z must be in... The magnitude plot in Fig. 14.76 represents the transfer function of a preamplifier. Find H(s). H (dB) 20 20 dB/decade 2,122 20 dB/decade 50 500 Design a problem to help other students better understand how to determine the Bode magnitude and phase plots of a given transfer function in terms of jÏ. Sketch the Bode magnitude and phase... This problem concerns the design of a multiplier for unsigned binary numbers that multiplies a 4-bit number by a 16-bit number to give a 20-bit product. To speed up the multiplication, a 4-by-4 array... Find the transfer function H(s) = V o V i of the circuit shown in Fig. 14.71 . V. ll V, (+) A radio receiver has an input resistance of 300 . When it is connected directly to an antenna system with a characteristic impedance of 75 , an impedance mismatch occurs. By inserting an... An association has 15 voting members. Executive meetings of this association can be held only if more than half (i.e., at least eight) of the members are present (i.e., eight is the minimum quorum... For the circuit in Fig. 13.82 , determine the impedance seen by the source. j2 N -j1 80/0 V (+ J5 j5 Q j2 Q ell ell Using Fig. 10.87 , design a problem to help other students better understand the superposition theorem. R2 jXL ll V2 -jXc R1 V, (+1
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