Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 2, Problem 21RQ
To determine
The suitable term for the sentence "is the time rate of doing work."
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It is the energy accounted by the molecular motion of the substance due to its, vibrational, rotational, and translational movement.
a. Work
b. Heat
c. Internal Energy
d. Chemical Energy
23. What is the ability of heated bodies to create work?
a. kinetic energy
potential energy
c. internal energy
d. thermal energy
24. This is the topic of analysis, one of the two components that affect a process's behavior.
a. system
b. boundary
c. surroundings
d. volume control
In very short term define the following:
1. Raw Material:
2. Work piece (work):
3. Product:
4. Tools:
5. Machine:
Chapter 2 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 2 - Matter is a substance that occupies space and has...Ch. 2 - What are the three states in which matter is...Ch. 2 - ________ is the term used for water when it is in...Ch. 2 - In what direction does a solid exert force?Ch. 2 - In what direction does a liquid exert force?Ch. 2 - Vapor exerts pressure in what direction? A....Ch. 2 - Define density.Ch. 2 - Define specific gravity.Ch. 2 - Describe specific volume.Ch. 2 - Why does an object weigh less on the moon than on...
Ch. 2 - The density of tungsten is 1210 lb/ft3. What would...Ch. 2 - The specific volume of red brass is 0.001865...Ch. 2 - Aluminum has a density of 171 lb/ft3. What would...Ch. 2 - Four pounds of a gas occupy 10 ft3. What would be...Ch. 2 - Why is information regarding the specific volume...Ch. 2 - Whose law states that the volume of a gas varies...Ch. 2 - At a constant pressure, how does a volume of gas...Ch. 2 - Describe Dalton's law as it relates to a confined...Ch. 2 - What are the two types of energy most frequently...Ch. 2 - How were fossil fuels formed?Ch. 2 - Prob. 21RQCh. 2 - Prob. 22RQCh. 2 - If an air-conditioning compressor weighing 300lb...Ch. 2 - Describe horsepower and list the three quantities...Ch. 2 - How many watts of electrical energy are equal to 1...Ch. 2 - How many Btu of heat can be produced by 4 kWh...Ch. 2 - How many Btu/h would be produced in a 12-kW...Ch. 2 - What unit of energy does the power company charge...Ch. 2 - If 3000 ft3 of air is crossing an evaporator coil...Ch. 2 - A gas is compressed inside a compressor's...
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- The coefficient of performance (COP) for a refrigerator is the rate of heat flowing into the refrigeration unit (heat into the evaporator) divided by the shaft work entering the compressor. The COP is therefore a:a) Percentage, between 0 and 100%.b) Dimensionless number that must be greater than one (or, ideally, equal to one)c) Dimensionless number that in reality rarely deviates from one by more than a few percent.d) Dimensionless number that can be less than one, or greater than one.e) Dimensional number that depends on the mass flow of refrigerant and specified units (e.g., English units such as BTU/hr)arrow_forwardA change of the system energy, AE, can be: a) positive, b) negative, c) of any sign or zero.arrow_forwardQ5. An established company has decided to add a new product to its line. It will buy the product from a manufacturing concern, package it, and sell it to a number of distributors that have been selected on a geographical basis. Market research has already indicated the volume expected and the size of sales force required. The steps shown in the following table are to be planned. Activity Description Predecessor Activity Duration (days) A B C D E F LL C A B C A E E E H,L K 14 4 2 1 2 3 2 4 3 12 4 2 2 G H 1 J K L M H,L (a) Draw an arrow diagram for the project. (b) Indicate the criticla path. (c) For each non-critical activity, find the total and free float. D,F,G Jarrow_forward
- Except for small changes caused by variations in temperature or pressure, the ______ ________ of any pure solid or liquid is constant. a) buoyant force b) mass density c) gauge pressure d) volume flow ratearrow_forwardUNIT TASK Create a system focusing on the first law of thermodynamics related to Electrical engineering field |arrow_forwardSelect the expression representing the flow work (flow energy), where is pressure, is volume, is velocity ________arrow_forward
- Select the energy forms that contribute to the mechanical energy of flowing fluids__________ A. kinetic B. heat C. potential D. flow workarrow_forwardIt is the ability of a liquid to spread out.arrow_forwardselect the incorrect statement a. work and heat transfer represent energy crossing a boundary. b. differential of work and heat transfer are exact. c. work and heat transfer are path integral. d. net work and net heat transfer are equal for a cycle.arrow_forward
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