Crash Course Engineering - Season : 1 Episode 22

In 46 episodes, Dr. Shini Somara will teach you how we built much of our world with engineering! This course is based on introductory college-level material across many different engineering disciplines. By the end of this course, you will be able to: *Consider the impact of engineering solutions in global, economic, environmental, and societal contexts *Recognize ethical and professional responsibilities in engineering situations and make informed judgements *Apply principles of engineering, science, and mathematics to identify and solve technical problems *Discuss grand challenges and questions in engineering and progress on solutions

Season 1 Episode 22 - Silicon, Semiconductors, & Solar Cells

Today we’re looking at silicon, and how introducing small amounts of other elements allow silicon layers to conduct currents, turning them into semiconductors. We’ll explore how putting two different types – N and P semiconductors – together gives us electrical components like diodes, transistors, and solar cells. Air Date : 25th-Oct-2018

Crash Course Engineering - Season : 1

Season 1 Episode 1 - What is Engineering?

In our first episode of Crash Course Engineering, Shini explains what engineering is, and gives a brief overview of its four main branches (civil, mechanical, electrical, and chemical) as well as a look at some of the other fields of engineering. Air Date : 17th-May-2018  Read More

Season 1 Episode 2 - Civil Engineering

We’re beginning our engineering journey with a tour through the major branches. Today Shini explains the facets of civil engineering, including structural and construction engineering, city planning, transportation, and sanitation. Air Date : 24th-May-2018  Read More

Season 1 Episode 3 - Mechanical Engineering

Today we continue our tour through the major fields of engineering with a look at mechanical engineering, beginning with the steam engine. We’ll discuss aircraft, the development of aerospace engineering, and take a look into the future of robotics and biomechanics. Air Date : 31st-May-2018  Read More

Season 1 Episode 4 - The History of Electrical Engineering

Next stop on our tour of engineering’s major fields: electrical engineering. In this episode we’ll explore the history of telecommunications, electric power and lighting, and computers. We’ll introduce topics like magnetism, electrical conduction, telegraphy, lighting, and computers. Air Date : 7th-Jun-2018  Read More

Season 1 Episode 5 - The History of Chemical Engineering

Today we’ll cover the fourth and final of our core disciplines of engineering: chemical engineering. We’ll talk about its history and evolution going from soda ash competitions to oil refineries and renewable energies. We’ll also discuss some newer and emerging fields like biotechnology and pharmaceuticals. Air Date : 14th-Jun-2018  Read More

Season 1 Episode 6 - Biomedical & Industrial Engineering

We’ve discussed the four main branches of engineering but there are so many other fields doing important work, so today we’re going to explore a few of them. In this episode we’ll explore some of the history and fundamentals of industrial engineering, biomedical engineering, and bioengineering. Air Date : 21st-Jun-2018  Read More

Season 1 Episode 7 - The Law of Conservation

Today Shini explains the law of conservation, beginning with simple, steady-state systems. We’ll discuss conversion and yield, accumulation, and how generation and consumption can affect how much accumulation there is in a system. Air Date : 28th-Jun-2018  Read More

Season 1 Episode 8 - Reversibility & Irreversibility

How do we design the most efficient machines and processes? Today we’ll try to figure that out as we discuss heat & work, reversibility & irreversibility, and how to use efficiency to measure a system. Air Date : 5th-Jul-2018  Read More

Season 1 Episode 9 - The First & Zeroth Laws of Thermodynamics

n today’s episode we’ll explore thermodynamics and some of the ways it shows up in our daily lives. We’ll learn the zeroth law of thermodynamics, what it means to reach a thermal equilibrium, and define the first law of thermodynamics. We’ll also explore how stationary, adiabatic, and isochoric processes can make our lives as engineers a little easier. Air Date : 12th-Jul-2018  Read More

Season 1 Episode 10 - Why We Can't Invent a Perfect Engine

We’ve introduced the 0th and 1st laws of thermodynamics, so now it’s time to move on to the second law and how we came to understand it. We’ll explain the differences between the first and second law, and we’ll talk about the Carnot cycle and why we can never design a perfectly efficient engine. Air Date : 19th-Jul-2018  Read More

Season 1 Episode 11 - Heat Engines, Refrigerators, & Cycles

Cycles are a big deal in engineering. Today we’ll explain what they are and how they’re used in heat engines, refrigerators, and heat pumps. We’ll also discuss phase diagrams and the power of using renewable energy resources Air Date : 2nd-Aug-2018  Read More

Season 1 Episode 12 - Stress, Strain & Quicksand

Today we’re talking all about fluid mechanics! We’ll look at different scales that we work with as engineers, mass and energy transfers, the no-slip condition, stress and strain, Newton’s law of viscosity, Reynold’s number, and more! Air Date : 9th-Aug-2018  Read More

Season 1 Episode 13 - Fluid Flow & Equipment

Today we’ll dive further into fluid flow and how we can use equipment to apply our skills. We explain Bernoulli’s Principle and the relationship between speed and pressure in certain flowing fluids. We’ll also discuss how to apply the principle with Bernoulli’s Equation and try to use it in real-world examples. Air Date : 16th-Aug-2018  Read More

Season 1 Episode 14 - Heat Transfe

Today we’re talking about heat transfer and the different mechanisms behind it. We’ll explore conduction, the thermal conductivity of materials, convection, boundary layers, and radiation. Air Date : 23rd-Aug-2018  Read More

Season 1 Episode 15 - How Not to Set Your Pizza on Fire

Today we’re going to explain how exchangers...exchange heat. We’ll look at concentric tubes, finned tubes, plate heat exchangers, and shell-and-tube heat exchangers. And we’ll look at some equations to help us sort through heat transfer and decide what heat exchangers are best suited for our designs. Air Date : 30th-Aug-2018  Read More

Season 1 Episode 16 - Drugs, Dyes, & Mass Transfer

Today we’re talking about mass transfer. It doesn’t just apply to objects and fluids as a whole, but also to the individual molecules and components that make them up. We’ll see that transfers of mass need their own driving force, discuss diffusion, and use Fick’s Law to help us model mass transfer. Air Date : 6th-Sep-2018  Read More

Season 1 Episode 17 - Mass Separation

It can be really important to separate out chemicals for all kinds of reasons. Today we’re going over three different processes engineers use to achieve that separation: distillation, which separates substances based on their different boiling points; liquid-liquid extraction, which uses differences in solubility to transfer a contaminant into a solvent; and reverse osmosis, which filters molecules from a solvent by pressurizing it through a semipermeable barrier. Air Date : 13th-Sep-2018  Read More

Season 1 Episode 18 - Reaching Breaking Point: Materials, Stresses, & Toughness

Today we’re going to start thinking about materials that are used in engineering. We’ll look at mechanical properties of materials, stress-strain diagrams, elasticity and toughness, and describe other material properties like hardness, creep strength, and fatigue strength. Air Date : 20th-Sep-2018  Read More

Season 1 Episode 19 - Metals & Ceramics

Today we’ll explore more about two of the three main types of materials that we use as engineers: metals and ceramics. We’ll discuss properties of metals, alloys, ceramics, clay, cement, and glass-ceramic materials. We’ll also look at the applications of our materials with microelectromechanical systems and accelerometers. Air Date : 27th-Sep-2018  Read More

Season 1 Episode 20 - The Polymer Explosion

We’re continuing our look at engineering materials with third main type of material that you’ll encounter as an engineer: polymers. They’re made of long, repeating chains of smaller molecules known as monomers and today we’ll explore their strange history of polymers and the things that contributed to how we use them today. Air Date : 4th-Oct-2018  Read More

Season 1 Episode 21 - Electrical Power, Conductors, & Your Dream Home

Today, we'll explore the materials electrical engineers work with. We'll look at high-conductors, insulators, and how low-conductivity conductors can be used to generate light and heat. Air Date : 18th-Oct-2018  Read More

Season 1 Episode 22 - Silicon, Semiconductors, & Solar Cells

Today we’re looking at silicon, and how introducing small amounts of other elements allow silicon layers to conduct currents, turning them into semiconductors. We’ll explore how putting two different types – N and P semiconductors – together gives us electrical components like diodes, transistors, and solar cells. Air Date : 25th-Oct-2018  Read More

Season 1 Episode 23 - The Mighty Power of Nanomaterials

Just how small are nanomaterials? And what can we do with stuff that small? Today we’ll discuss some special properties of nanomaterials, how some can change at different sizes, and the difference between engineered nanomaterials and ones that occur naturally. We’ll also talk about some of the future research that’s needed on the use of nanomaterials. Air Date : 1st-Nov-2018  Read More

Season 1 Episode 24 - Biomaterials

We’ve talked about different materials engineers use to build things in the world, but there’s a special category of materials they turn to when building things to go inside our bodies. In this episode we’ll explore the world biomaterials like titanium and their coatings, the special chemistry of polyurethane, and the cross-linked structure of hydrogels. We’ll also look at the importance of safety & research, as well as the enormous future potential of biomaterials. Air Date : 8th-Nov-2018  Read More

Season 1 Episode 25 - Cheese, Catastrophes, & Process Control

Engineering, like life, could really use a lot more cheese. This week we are looking at a cheese factory in Toronto and what it can teach us about process control systems. We’ll explore feedforward and feedback systems, and see how integrating them both with the final check of cascade control creates a system made to handle uncertainty the world throws its way. Air Date : 15th-Nov-2018  Read More

Season 1 Episode 26 - Skyscrapers, Statics, & Dynamics

What if you were on a high floor of a skyscraper and the building started swaying? Today we’ll explore statics and dynamics, and what they mean for the structures we design. We look at the idea of static equilibrium, forces, and torques, and how free body diagrams can help us make sense of it all. Air Date : 29th-Nov-2018  Read More

Season 1 Episode 27 - Engineering Ethics

We’ve talked about many important concepts for engineers, but today we’re going to discuss a hugely important one that you might not even realize is an engineering concept: ethics. We’ll talk about what a Code of Ethics is. We’ll explore engineering ethics and the ethical theories of utilitarianism, rights ethics, and duty ethics. We’ll also take a look at a few different real life examples of ethical problems in engineering. Air Date : 6th-Dec-2018  Read More

Season 1 Episode 28 - Flirting With Disaster - The Importance of Safety

As engineer, sometimes lives will be in your hands, so this week we’re exploring safety and its impact on engineering. We’ll discuss the difference between occupational safety and public safety and how to analyze and review a process for any potential dangers with things like HAZOP. We’ll learn the dangers of having too many alarms and look at how important it is to adopt a good mindset of safety culture. Air Date : 13th-Dec-2018  Read More

Season 1 Episode 29 - Preventing Flint - Environmental Engineering

A lot of work goes into managing our impact on the environment and its impact on us. That work is the work of environmental engineers. In this episode we’ll explore water quality, air quality, noise pollution, waste management, and more. Air Date : 20th-Dec-2018  Read More

Season 1 Episode 30 - The Engineering Challenges of Renewable Energy

This week we are looking at renewable energy sources and why we need them. We’ll explore hydropower, wind, geothermal, and solar power, as well as some of the challenges, and how engineers are working to make their use more widespread. Air Date : 3rd-Jan-2019  Read More

Season 1 Episode 31 - The Future of Clean Energy

This week we are exploring alternative energy sources. We'll look at how biomass can be burned as a fuel source, how hydrogen can be used in a fuel cell to generate electrical power, and how nuclear fission provides power to the grid. We'll also discuss how nuclear fusion might someday do the same without any radioactive waste. Air Date : 10th-Jan-2019  Read More

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