Become an Instructor

HOW TO TEACH ONLINE – 5 Steps to Start Online Teaching for Beginners 💻

By Samuel Ngugi Uncategorized
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About Course

Are you looking to start teaching online but don’t know where to begin? I’ll share the 5 essential steps to launch your online teaching career, even if you’re a complete beginner. Learn about online teaching companies, online teaching marketplaces and freelance online teaching plus which equipment to purchase and tips for your online teaching demo and intro video.

Course Content

Thermodynamics
hermodynamics is the branch of physics studying the relationships between heat, work, temperature, and energy. It governs how systems convert energy, dictate process spontaneity, and manage energy transfer, applying to macroscopic systems in engineering and science, from engines to chemical reactions. Key laws cover equilibrium (Zeroth), conservation (First), entropy (Second), and absolute zero (Third).

  • Lesson 1: Introduction to Thermodynamics (with Mountain Dew)
    08:11
  • Lesson 2: Thermodynamic Properties
    08:56
  • Lesson 3: Units
    11:29
  • Lesson 4: Properties of Pure Substances
    13:45
  • Lesson 5: Hydrostatic Pressure
    08:51
  • Introduction to thermodynamics

Fluid Mechanics
This video provides an introduction to the subject of Fluid Mechanics. The speaker, Professor S.K. Som, defines fluid mechanics, explains its importance in daily life and engineering, and traces its historical development. He then details the course content, covering topics from fluid statics to turbulent flow. Finally, the professor introduces key concepts such as viscosity, Newtonian and non-Newtonian fluids, and the concept of Continuum. Here's a breakdown of the video's content: Introduction to Fluid Mechanics (0:20-1:46): The professor introduces fluid mechanics as the study of physical laws governing the flow of liquids and gases. He emphasizes its role in understanding phenomena like pressure and velocity fields, as well as fluid properties like density and viscosity. Importance and Applications of Fluid Mechanics (1:46-3:06): The video highlights the omnipresence of fluid mechanics in various aspects of life, from breathing and blood circulation to sprinkling water on a lawn, oil transportation, and high-tech applications like submarines and space shuttles. Historical Development of Fluid Mechanics (3:07-5:00): The professor discusses the evolution of fluid mechanics, mentioning contributions from historical figures like Archimedes, Newton, and Euler. He notes the shift from natural observation and analytical methods to empirical rules and the development of computational fluid mechanics in the 20th century. Course Content Overview (5:00-8:39): The professor outlines the main topics that will be covered in the course, including: Introduction and Fundamental Concepts (6:06) Fluid Statics (6:26) Kinematics of Fluid (6:45) Conservation Equations for Fluid Flow (6:54) Fluid Flow Applications (7:03) Viscous Incompressible Flow (7:11) Application of Viscous Flow through Pipes (7:18) Principles of Similarity (7:30), which is crucial for model experiments in engineering. Flow of Ideal Fluids (8:13) Flows with a Free Surface (8:16) Unsteady Flow Phenomena (8:20) Introduction to Laminar Boundary Layer (8:30) Introduction to Turbulent Flow (8:36) Recommended Textbooks (8:43-10:09): The professor suggests several textbooks for the course, stressing the importance of reading books and solving problems: Fluid Mechanics by G. Viswas (9:20) Fluid Mechanics by Frank M. White (9:37) Elements of Fluid Mechanics by Seshadri and Panikar (9:52) Mechanics of Fluids by Irving H. Shames (9:59) Defining Fluid from a Mechanics Viewpoint (10:14-15:58): The video differentiates fluids from solids based on their response to tangential force or shear stress. Fluids continuously deform under shear stress, unlike solids which undergo a definite deformation and may regain their shape. Fluids are described as "zero memory substances" (14:05), meaning they do not return to their original shape after the load is removed, with the exception of special viscoelastic fluids. Constitutive Equations (15:58-16:05): The professor explains that for fluids, stress is related to the rate of strain, distinguishing it from solids where stress is related to strain. Concept of Continuum (16:11-24:22): The video introduces the concept of Continuum, where fluid properties like pressure and velocity are defined as continuous functions of space and time, assuming molecules are closely packed. This concept is valid when the Knudsen number (ratio of mean free path to characteristic dimension) is less than 0.01. Viscosity (24:27-30:08): Viscosity is introduced as a fluid property manifested only when the fluid is in motion. The video explains how shear stress develops between adjacent fluid layers due to velocity variations. Newton's Law of Viscosity (30:08-34:50): This fundamental law states that shear stress is directly proportional to the velocity gradient (or rate of shear strain), with the proportionality constant being the coefficient of viscosity (μ). Fluids that obey this law are called Newtonian fluids. Newtonian vs. Non-Newtonian Fluids (34:50-37:00): The video distinguishes Newtonian fluids (like water, air, oil, mercury) which exhibit a linear relationship between shear stress and velocity gradient, from non-Newtonian fluids (like blood, milk, polymer solutions, gelatin, ink) which do not. Non-Newtonian Fluid Models (37:00-47:29): The professor briefly touches upon the complexity of non-Newtonian fluids, categorizing them into time-independent and time-dependent types. He introduces the Ostwald de Waele power law model (38:20), represented as τ = M(du/dy)^n, where 'n' is the flow behavior index and 'M' is the flow consistency index. When n 1, fluids are called dilatant fluids (40:09). He explains that for non-Newtonian fluids, viscosity is not a constant property but rather an apparent viscosity (47:15) that depends on the flow situation. Ideal Fluid (47:32-49:59): An ideal fluid is defined as a hypothetical fluid with zero viscosity. While no real fluid has zero viscosity, the concept simplifies analysis for high-velocity flows away from solid surfaces. Ideal Solid and Bingham Plastic (49:59-51:53): The video also briefly mentions the concept of an ideal solid (no deformation regardless of stress) and Bingham plastics (50:50), which require a definite "yield stress" before they begin to flow.

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