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Further material  - Thermal Efficiency  & Reverse heat engines.

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Further material  - Thermal Efficiency  & Reverse heat engines.

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Anti-Heat Engines:  Refrigerators, Air Conditioners, and Heat Pumps | Doc Physics

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Heat Engines, Thermal Efficiency, & Energy Flow Diagrams - Thermodynamics & Physics Problems

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This describes the efficiency of an idealized engine, which in reality is impossible to achieve. From this equation, the lower the sink temperature or the higher the source temperature , the more work is available from the heat engine. The energy for work comes from a decrease in the total energy of the fluid used in the system.

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The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions, although it has several limitations.

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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| a.   In the laboratory you are required to test a ingot of iron from the above bridge construction having a mass of 15kg. You are required to calculate the following:
i.        The heat required to change the temperature of ingot to 1450 ⁰ C?
ii.        How much energy is required to melt the iron once it reaches its melting point? (Assume melting point of iron 1538 ⁰ C and Latent heat of fusion of iron Li=247.2916  kJ/kg, room temperature 20 ⁰ C)

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SAMPLE QUESTION - FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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SAMPLE QUESTION - FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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When a heated glass is suddenly cooled, it shatters. Why? When things are not free to expand, they end up developing stress, called thermal stress. In this video, we will explore this concept of thermal stress with the help of a numerical Created by Mahesh Shenoy

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FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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FORCES ON A COMPONENT UNDER THERMAL EXPANSION 

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|  If the bridge in task 1 is prevented from expanding, what would be the stress and force induced in it given that E = 100 GPa ?

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GCSE Science Revision Physics "Internal Energy"

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GCSE Physics Revision "Specific Heat Capacity"

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only watch the first five minutes and try the sample question .

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Linear Expansion of Solids, Volume Contraction of Liquids, Thermal Physics Problems

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The Forth Bridge is constructed of steel and is 2.0KM long. The linear expansivity (α) of steel is 11X10⁻⁶ K⁻¹. The minimum winter temperature may be as low as -20ºC and the maximum summer temperature can reach as high as 50ºC. What distance must be allowed for the change in length of the bridge?

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Internal Energy - Specific heat capacity - linear expansion

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Fluid pressure

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Archimede's Principle: Density of an Object

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Physics - Fluid Statics (9 of 10) Archimede's Principle: Density of an Object

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Archimede's Principle: Density of an Object

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Physics - Fluid Statics (9 of 10) Archimede's Principle: Density of an Object

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Fluid

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Force on a submerged wall - only watch it till 11:04

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Task 3: At a section in a tapered pipe, the diameter is 800 mm and the velocity of the liquid at that section is 5 m/s. Assuming the flow of the liquid to be steady, determine the velocity when the pipe diameter is 600 mm?                           

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Task 3: At a section in a tapered pipe, the diameter is 800 mm and the velocity of the liquid at that section is 5 m/s. Assuming the flow of the liquid to be steady, determine the velocity when the pipe diameter is 600 mm?                           

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dia 800 mm

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Volume flow rate and equation of continuity

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Volume flow rate and equation of continuity

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Volume flow rate and equation of continuity | Fluids | Physics | Khan Academy

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Sal introduces the notion of moving fluids and laminar flow. Then he uses the incompressibility of a liquid to show that the volume flow rate (flux) must remain constant. Sal then derives the equation of continuity in terms of the area and speed. . Created by Sal Khan.

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Physics Fluid Flow (2 of 7) Bernoulli's Equation

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Problem on Calculation of Induced shear Stress.

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Physics - Mechanics: Stress and Strain (9 of 16) Basics: Shear Modulus-S

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Physics - Mechanics: Stress and Strain (12 of 16) Ex. 3: Punch Hole in Steel Plate

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Two plates made of aluminium alloy are joined by a rivet and are subjected to force F as shown in diagram below.

The component has the following material parameters:

F= 1200 N

d = 20 mm

G = 89 GPa

Calculate the shear stress and strain induced by shear loading :
1. Calculate the cross-section area of the part.

A =

2. Calculate the induced shear stress.

t =

3. Calculate the induced shear strain

g =

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Physics - Mechanics: Stress and Strain (6 of 16) Young's Modulus: Ex. 1: Aluminum Wire

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Youngs Modules

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Physics - Mechanics: Stress and Strain (5 of 16) Young's Modulus

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A rectangular bar 300 mm long (cross-section of the bar is a square, the dimension of the side of the square is represented by length ‘a’) is made of aluminium and has a compressive force of 15 kN applied to it. Material: Aluminium F= 15 kN l = 300 mm a = 50 mm E = 69 x10⁹ Pa.
1.  Draw a diagram showing the bar under load
2. Calculate the cross-section area of the part.
3. Calculate the induced stress.
4. Calculate the induced strain.
5. Calculate the dimensional change.

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Beam Cal sample 1 - one point load

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How to Calculate Support Reactions of a Simply Supported Beam with a Point Load

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Static equilibrium

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Young Modulus, Tensile Stress and Strain

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Internal Forces-Tension, Shear Force, Bending Moment