1 Heat, Temperature, And Pressure 2 Matter And Energy 3 Refrigeration And Refrigerants 4 General Safety Practices 5 Tools And Equipment 6 Fasteners 7 Tubing And Piping 8 Leak Detection, System Evacuation, And System Cleanup 9 Refrigerant And Oil Chemistry And Management-recovery, Recycling, 10 System Charging 11 Calibrating Instruments 12 Basic Electricity And Magnetism 13 Introduction To Automatic Controls 14 Automatic Control Components And Applications 15 Troubleshooting Basic Controls 16 Advanced Automatic Controls-direct Digital Controls (ddcs) And Pneumatics 17 Types Of Electric Motors 18 Application Of Motors 19 Motor Controls 20 Troubleshooting Electric Motors 21 Evaporators And The Refrigeration System 22 Condensers 23 Compressors 24 Expansion Devices 25 Special Refrigeration System Components 26 Applications Of Refrigeration Systems 27 Commercial Ice Machines 28 Special Refrigeration Applications 29 Troubleshooting And Typical Operating Conditions For Commercial refrigeration 30 Electric Heat 31 Gas Heat 32 Oil Heat 33 Hydronic Heat 34 Indoor Air Quality 35 Comfort And Psychrometrics 36 Refrigeration Applied To Air-conditioning 37 Air Distribution And Balance 38 Installation 39 Residential Energy Auditing 40 Typical Operating Conditions 41 Troubleshooting 42 Heat Gains And Heat Losses In Structures 43 Air Source Heat Pumps 44 Geothermal Heat Pumps 45 Domestic Refrigerators And Freezers 46 Room Air Conditioners 47 High-pressure, Low-pressure, And Absorption Chilled-water Systems 48 Cooling Towers And Pumps 49 Operation, Maintenance, And Troubleshooting Of Chilled-water Air-conditioning Systems 50 Commercial, Packaged Rooftop, Variable Refrigerant Flow, And Variable Air Volume Systems Chapter2: Matter And Energy
Chapter Questions Section: Chapter Questions
Problem 1RQ: Matter is a substance that occupies space and has A. color. B. texture. C. temperature. D. mass. Problem 2RQ: What are the three states in which matter is commonly found? Problem 3RQ: ________ is the term used for water when it is in the solid state. Problem 4RQ: In what direction does a solid exert force? Problem 5RQ: In what direction does a liquid exert force? Problem 6RQ: Vapor exerts pressure in what direction? A. Outward B. Upward C. Downward D. All of the above Problem 7RQ: Define density. Problem 8RQ: Define specific gravity. Problem 9RQ: Describe specific volume. Problem 10RQ: Why does an object weigh less on the moon than on earth? Problem 11RQ: The density of tungsten is 1210 lb/ft3. What would be its specific volume? Problem 12RQ: The specific volume of red brass is 0.001865 ft3/lb. Whatwould be its density? Problem 13RQ: Aluminum has a density of 171 lb/ft3. What would be its specific gravity? Problem 14RQ: Four pounds of a gas occupy 10 ft3. What would be itsdensity and specific gravity? Problem 15RQ: Why is information regarding the specific volume of gases important to the designer of... Problem 16RQ: Whose law states that the volume of a gas varies inversely with the absolute pressure, as long as... Problem 17RQ: At a constant pressure, how does a volume of gas vary with respect to the absolute temperature? Problem 18RQ: Describe Dalton's law as it relates to a confined mixture of non-reactive gases. Problem 19RQ: What are the two types of energy most frequently used or considered in this industry? Problem 20RQ: How were fossil fuels formed? Problem 21RQ Problem 22RQ Problem 23RQ: If an air-conditioning compressor weighing 300lb had tobe lifted 4 ft to be mounted on a base, how... Problem 24RQ: Describe horsepower and list the three quantities needed to determine horsepower. Problem 25RQ: How many watts of electrical energy are equal to 1 hp? Problem 26RQ: How many Btu of heat can be produced by 4 kWh ofelectricity? Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater? Problem 28RQ: What unit of energy does the power company charge the consumer for? Problem 29RQ: If 3000 ft3 of air is crossing an evaporator coil and iscooled from 75F to 55F, what would be the... Problem 30RQ: A gas is compressed inside a compressor's cylinder. When the piston is at its bottom dead center,... Problem 12RQ: The specific volume of red brass is 0.001865 ft3/lb. Whatwould be its density?
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Use the dot product to find the angle between the position vectors A and B
Transcribed Image Text: 120 mm
B
50
y
200 mm
180 mm
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
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