Lab Manual for Smith's Electricity for Refrigeration, Heating, and Air Conditioning, 9th
9th Edition
ISBN: 9781285180014
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 3, Problem 16RQ
To determine
The voltage supplied to each circuit when three circuits are connected in parallel.
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30 mm
D
=
40 MPa
-30 mm
B
C
80 MPa
PROBLEM 2.69
A 30-mm square was scribed on the side of a large steel pressure
vessel. After pressurization, the biaxial stress condition at the square
is as shown. For E = 200 GPa and v=0.30, determine the change in
length of (a) side AB, (b) side BC, (c) diagnonal AC.
Please solve in detail this problem
thank you
0,5 mm
450 mm
350 mm
Bronze
A =
1500 mm²
E = 105 GPa
प
21.6 × 10-PC
Aluminum
A = 1800 mm²
£ = 73 GPa
=
a 23.2 × 10-PC
PROBLEM 2.58
Knowing that a 0.5-mm gap exists when the temperature is 24°C,
determine (a) the temperature at which the normal stress in the
aluminum bar will be equal to -75 MPa, (b) the corresponding exact
length of the aluminum bar.
Chapter 3 Solutions
Lab Manual for Smith's Electricity for Refrigeration, Heating, and Air Conditioning, 9th
Ch. 3 - What is a series circuit?Ch. 3 - What is a control circuit?Ch. 3 - Safety devices in an electrical circuit are...Ch. 3 - How are series circuits used in air-conditioning...Ch. 3 - Why are series circuits used for most control...Ch. 3 - The current draw in a series circuit is _____. a....Ch. 3 - The voltage drop of a series circuit is _____. a....Ch. 3 - How would switches used as safety devices be...Ch. 3 - Draw a series circuit with a thermostat, a...Ch. 3 - Two identical 115-volt light bulbs connected in...
Ch. 3 - Prob. 11RQCh. 3 - Prob. 12RQCh. 3 - Parallel circuits are used in the air-conditioning...Ch. 3 - Why are parallel circuits used in the...Ch. 3 - Prob. 15RQCh. 3 - Prob. 16RQCh. 3 - If two 115-volt loads were connected in parallel...Ch. 3 - What is a series-parallel circuit?Ch. 3 - Why are series-parallel control circuits important...Ch. 3 - Draw a series-parallel circuit with one switch...Ch. 3 - What is the resistance of a parallel circuit with...Ch. 3 - What is the resistance of a parallel circuit with...Ch. 3 - What is the total ampere draw of a parallel...Ch. 3 - What is the voltage of a series circuit with four...Ch. 3 - What is the resistance of a series circuit with...
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- It is the middle of a winter snowstorm. Sally and Jin take shelter under an overhang. The loading of the snow on top of the overhang is shown in the figure below. The overhang is attached to the wall at points A and B with pin supports. Another pin is at C. Determine the reactions of the pin supports at A and B. Express them in Cartesian vector form.arrow_forwardRecall that the CWH equation involves two important assumptions. Let us investigate how these assumptions affect the accuracy of state trajectories under the control inputs optimized in (a) and (b). (c.1): Discuss the assumptions about the chief and deputy orbits that are necessary for deriving CWH.arrow_forwardPROBLEM 2.50 1.8 m The concrete post (E-25 GPa and a = 9.9 x 10°/°C) is reinforced with six steel bars, each of 22-mm diameter (E, = 200 GPa and a, = 11.7 x 10°/°C). Determine the normal stresses induced in the steel and in the concrete by a temperature rise of 35°C. 6c " 0.391 MPa 240 mm 240 mm 6₁ = -9.47 MPaarrow_forward
- For some viscoelastic polymers that are subjected to stress relaxation tests, the stress decays with time according to a(t) = a(0) exp(-4) (15.10) where σ(t) and o(0) represent the time-dependent and initial (i.e., time = 0) stresses, respectively, and t and T denote elapsed time and the relaxation time, respectively; T is a time-independent constant characteristic of the material. A specimen of a viscoelastic polymer whose stress relaxation obeys Equation 15.10 was suddenly pulled in tension to a measured strain of 0.5; the stress necessary to maintain this constant strain was measured as a function of time. Determine E (10) for this material if the initial stress level was 3.5 MPa (500 psi), which dropped to 0.5 MPa (70 psi) after 30 s.arrow_forwardFor the flows in Examples 11.1 and 11.2, calculate the magnitudes of the Δ V2 / 2 terms omitted in B.E., and compare these with the magnitude of the ℱ terms.arrow_forwardCalculate ℛP.M. in Example 11.2.arrow_forward
- Question 22: The superheated steam powers a steam turbine for the production of electrical power. The steam expands in the turbine and at an intermediate expansion pressure (0.1 MPa) a fraction is extracted for a regeneration process in a surface regenerator. The turbine has an efficiency of 90%. It is requested: Define the Power Plant Schematic Analyze the steam power system considering the steam generator system in the attached figure Determine the electrical power generated and the thermal efficiency of the plant Perform an analysis on the power generated and thermal efficiency considering a variation in the steam fractions removed for regeneration ##Data: The steam generator uses biomass from coconut shells to produce 4.5 tons/h of superheated steam; The feedwater returns to the condenser at a temperature of 45°C (point A); Monitoring of the operating conditions in the steam generator indicates that the products of combustion leave the system (point B) at a temperature of 500°C;…arrow_forwardThis is an old practice exam question.arrow_forwardSteam enters the high-pressure turbine of a steam power plant that operates on the ideal reheat Rankine cycle at 700 psia and 900°F and leaves as saturated vapor. Steam is then reheated to 800°F before it expands to a pressure of 1 psia. Heat is transferred to the steam in the boiler at a rate of 6 × 104 Btu/s. Steam is cooled in the condenser by the cooling water from a nearby river, which enters the condenser at 45°F. Use steam tables. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Determine the pressure at which reheating takes place. Use steam tables. Find: The reheat pressure is psia. (P4)Find thermal efficiencyFind m dotarrow_forward
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