Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
My Basket
Notes -Notions & Basics of electrical engineering£6.25
introduction to networks£3.44
Semiconductor diode Analog Electronic Diploma £1.50
Software £12.50
PLC Programming for Industrial Automation£1.25
HNC HND in Mechanical Electrical Electronic Engineering Unit 1 - Analytical Methods for Engineers£2.50
role of BME in hospital management - summary£10.00
Programming Embedded System I£6.25
Presentation skills£1.50
Simplified physics£12.50
HYDRAULIC PUMPS£1.50
Operations on complex numbers in algebraic form£4.38
Implicit functions and their differentiation£2.00
Decomposition of fractional rational function (Mathematics)£2.00
emft notes£62.50
Introductory Electricity, Magnetism and Mordern Physics£12.50
4 MVA and 2MVA distribution transformer wiring diagram £18.75
Project of Mechanical engineering£0.50
Modern Physics.£3.75
HNC HND in Mechanical Electrical Electronic Engineering Unit 1 - Analytical Methods for Engineers£2.50
Direct integrating £3.13
Types of Motor Loads£2.75
Basic Electrical Engineering£7.50
Basic electrical engineering £6.25
induction motor£38.13
DATA STRUCTURE & ALGORITHM £0.50
Total£226.31
Description: Its gives a detailed explanation on heat, its transfer, expansion and formulas. Its can be used by anybody that need knowledge on heat no matter the class, institution or age.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Notes On Heat Energy, Heat Transfer and expansion in solids and liquids
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Heat energy is a type of energy created by the vibration and collision of atoms and molecules
Heat energy is also known as Thermal energy
Its standard unit of measurement is Joule
Other units include calorie and the British thermal unit (BTU)
Heat energy is transferred from hot objects to cooler or cold objects never does the reverse
occurs
...
g
...
Heat energy is a scalar quantity i
...
It has magnitude but no direction
Heat transfer occurs due to the difference in temperature between two objects
...
Temperature is the degree of hotness or coldness of an object or body
A Thermometer is a device used to measure Temperature example include mercury-in-glass
thermometer
Temperature is measured in degree Celsius(OC), degree Fahrenheit(OF) and Kelvin (K)
Kinetic theory explanation of temperature
Addition of heat to a substance cause an increase in the speed of the motion of the molecules and
hence an increase in the average kinetic energy of the molecules of the substances and thus
increase in temperature
...
g
...
Expansion of the body
Thermionic emission
Modes of Heat transfer
Conduction: Transfer of heat vibration or movement of the molecules through a material(solid)
Applications:
✓ Use of metals to make cooking utensils
✓ Use of thick clothes to keep warm e
...
sweater
✓ The use of tiles and rugs on floors
Convection: Transfer of heat through a fluid(liquid or gas) by movement of the heated fluid
Applications:
✓ Land and sea breeze
✓ Ventilation: circulation of fresh air in a room
Radiation: Process where heat is transferred without heating of the intervening medium e
...
sun
rays
...
Expansion
✓ Expansion is defined as increase in the size of body or object
...
Its unit is K-1 Or OC-1
✓
Formula for Linear expansivity
𝛼=
L2−L1
=
𝐿1(𝜃2−𝜃1)
𝛼=
L2−L1
𝐿1(∆𝜃)
✓ Where L= Length and (∆𝜃)= change in temperature
Superficial or Area Expansion
✓ Superficial or area expansion is increase in area per unit area per degree rise in temperature
✓ Formula for superficial expansion
𝛽=
A2−A1
𝐴1(𝜃2−𝜃1)
= 𝛽=
A2−A1
𝐴1(∆𝜃)
Where A= Area= Length × breadth=Length × Length and (∆𝜃)= change in temperature
Cubic/volume expansivity
✓ It’s the increase in volume per unit volume per degree rise in temperature
𝑉2−𝑉1
𝑉2−𝑉1
✓ Formula for cubic expansivity
𝛾 = 𝑉1( 𝜃2−𝜃1) = 𝑉1(∆𝜃)
✓ Where V = volume= length × breadth ×height= Length × length × length = L3
Expansion in liquids
✓ Expansion in liquid can be real or apparent
✓ Real cubic expansivity is the increase in volume per unit volume per degree rise in
temperature
✓ Apparent cubic expansivity is the increase in volume per unit volume per degree rise in
temperature when the liquid is heated in an expansible vessel
...
g
...
Description: Its gives a detailed explanation on heat, its transfer, expansion and formulas. Its can be used by anybody that need knowledge on heat no matter the class, institution or age.