Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 7, Problem 1RQ
Alternating current is __________.
- a. an alternating flow of electrons
- b. electrons reversing their flow at regular intervals
- c. the most commonly used current
- d. all of the above
Expert Solution & Answer
To determine
Alternating current is
Explanation of Solution
Alternating current is the flow of electric charge in both positive and negative directions.
In other words, the flow of electric charge which shifts its direction with respect to time is known as alternating current.
Hence, the correct answer is “option d. all the above”.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
As shown in the figure below, moist air at T₁ = 36°C, 1 bar, and 35% relative humidity enters a heat exchanger operating at steady state
with a volumetric flow rate of 10 m³/min and is cooled at constant pressure to 22°C. Ignoring kinetic and potential energy effects,
determine:
(a) the dew point temperature at the inlet, in °C.
(b) the mass flow rate of moist air at the exit, in kg/min.
(c) the relative humidity at the exit.
(d) the rate of heat transfer from the moist air stream, in kW.
(AV)1, T1
P₁ = 1 bar
11
= 35%
120
T₂=22°C
P2 = 1 bar
The inside temperature of a wall in a dwelling is 19°C. If the air in the room is at 21°C, what is the maximum relative humidity, in
percent, the air can have before condensation occurs on the wall?
The inside temperature of a wall in a dwelling is 19°C. If the air in the room is at 21°C, what is the maximum relative humidity, in
percent, the air can have before condensation occurs on the wall?
Chapter 7 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- ###arrow_forwardFind the closed loop transfer function and then plot the step response for diFerentvalues of K in MATLAB. Show step response plot for different values of K. Auto Controls Show solution for transform function and provide matlab code (use k(i) for for loop NO COPIED SOLUTIONSarrow_forwardThis is an old practice exam. The answer is Ta-a = 4.615 MPa max = 14.20 MPa Su = 31.24 MPa Sus = 10.15 MPa but why?arrow_forward
- This is an old practice exam. The answer is dmin = 42.33 mm but how?arrow_forward5.) 12.124* - Block B (WB = 12 lb) rests as shown on the upper surface of wedge A (W₁ = 30 lb). The angle of the slope is 0 = 30°. Neglect friction, and find immediately after the system is released from rest (a) the acceleration of a (a) and (b) the acceleration of B relative to A (a B/A).arrow_forwardWhat is the Maximum Bending Moment induced in the following Beam, if? P = 19 KN L = 11 m Ensure that your answer is in kN.m. لا اللهarrow_forward
- What is the Magnitude of the Maximum Stress in the beam below if? W。 = 6 kN/m L = 9 m Beam width, b = 226 mm Beam Height, h = 273 mm Give your answer in MPa. A 233 B 4|3 Woarrow_forwardWhat is the Reaction Force induced in the following system at point A, if? W = 12 kN/m P = 35 kN L = 11 m Ensure that your answer is in kN. ولها A 4/2 ↓↓ P Barrow_forward180- Dimensions in mm 100 100 D E Steel B Brass 60 kN 40 kN 40-mm diam. 30-mm diam. PROBLEM 2.40 Solve Prob. 2.39, assuming that rod AC is made of brass and rod CE is made of steel. PROBLEM 2.39 Two cylindrical rods, one of steel and the other of brass, are joined at C and restrained by rigid supports at A and E. For the loading shown and knowing that E = 200 GPa and E, 105 GPa, determine (a) the reactions at A and E, (b) the deflection of point C. = R = 45.5 kN ← Aarrow_forward
- Dimensions in mm 100 100 -180- -120-+- C D Steel B Brass 60 kN 40 kN 40-mm diam. 30-mm diam. E PROBLEM 2.39 Two cylindrical rods, one of steel and the other of brass, are joined at Cand restrained by rigid supports at A and E. For the loading shown and knowing that E = 200 GPa and E₁ = 105 GPa, determine (a) the reactions at A and E, (b) the deflection of point C.arrow_forward(read image) (Answer: vE = 0.514 m/s)arrow_forward0.36 m Problem 2.27 P=5kN D Each of the links AB and CD is made of aluminum (E=75 GPa) and has a cross-sectional area of 125 mm². Knowing that they support the rigid member BC, determine the deflection of point E. B E 0.44 m 0.20 marrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Electrical Transformers and Rotating MachinesMechanical EngineeringISBN:9781305494817Author:Stephen L. HermanPublisher:Cengage Learning
Understanding Motor ControlsMechanical EngineeringISBN:9781337798686Author:Stephen L. HermanPublisher:Delmar Cengage Learning
Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...Mechanical EngineeringISBN:9781305578296Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill JohnsonPublisher:Cengage Learning
Electrical Transformers and Rotating Machines
Mechanical Engineering
ISBN:9781305494817
Author:Stephen L. Herman
Publisher:Cengage Learning
Understanding Motor Controls
Mechanical Engineering
ISBN:9781337798686
Author:Stephen L. Herman
Publisher:Delmar Cengage Learning
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Refrigeration and Air Conditioning Technology (Mi...
Mechanical Engineering
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:Cengage Learning
Heat Transfer [Conduction, Convection, and Radiation]; Author: Mike Sammartano;https://www.youtube.com/watch?v=kNZi12OV9Xc;License: Standard youtube license