Physics Quiz. 5 Popular questions answered. Can you solve these questions?

Why do spaceships heat up when entering earth but not when exiting?, Why can I touch aluminum foil in the oven and not get burned?, Why are we able to see...

This video explains how a light bulb emits light by using electricity to make the thin metal inside the bulb glow. It introduces the concept of electromagnetic energy and how it is associated with the movement of electrical...

AP Physics C: Electricity and Magnetism review of Current, Resistance, and Simple Circuits including: deriving electric current in terms of drift velocity, current density version of Ohm’s law, defining resistivity, deriving resistance,...

In this video lecture, the topic of infrared radiation is explained in relation to how it affects the temperature of a body. The video presents a graph representing how the energy emitted per unit area per second, or the intensity of...

Electricity makes our lives easier every day. We use electricity in our work and play. Because electricity is virtually unseen, it is often difficult to understand just where it comes from and how it works. By watching the video and...

This video is a lecture on efficiency where the speaker explains how to calculate the efficiency of a device and identify the energy transfers that take place. The video starts with an introduction to Sankey diagrams that detail all the...

In this video, the concept of efficiency is discussed in relation to devices that transfer energy from one form to another. The video provides three examples of calculating efficiency, including a light bulb, a speaker, and an electric...

The video discusses how solutions to problems may not always be complete remedies and may only solve part of the problem. The video explains how scientists and engineers are still working on improving the solution of creating cleaner...

Auto Project Edges on Reference (required)

This setting used to be on by default. You'll want to enable it to ensure the line drawn on the cylinder (for the Sphere location) is snapped in vertically. Click your Profile Photo (or...

Here are 20 economics jokes for you to enjoy. I found some of them on the interent and some I wrote myself. Let me know in the comments which ones are your favorite. By the way, if you actually get all these jokes you really know your...

The video focuses on the concept of energy dissipation and how it occurs in various systems. It begins by explaining the principle of conservation of energy and then goes on to provide examples of closed and open systems. The video then...

In this video, we explore the concept of electromagnetic energy and its role in lighting up a bulb. This video highlights the everyday presence and importance of electromagnetic energy in our lives, from powering our devices to the...

In which John discusses the extraordinary life of Margarete Steiff and the invention of stuffed animals.

I first learned about Margarete Steiff while researching the (genuinely astonishing) history of teddy b
ears;
History is...

A quick demonstration of a 4 x 9W light bulb smart home system prototype. Each light bulb is connected to a 5V relay module. An android smartphone (with app) is used to turn each respective light bulb on and off. ESP32 microcontrollers...

This video provides an explanation of how to calculate the efficiency of a device by using Sankey diagrams to identify energy transfers and utilizing a formula to find the percentage of useful energy output. The video includes examples...

A stream of air is used to levitate a small ball—and also a light bulb.



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This video provides a concise explanation of how a light globe, or light bulb, works. It discusses the invention and history of the light bulb, as well as the science behind its operation. Understand how electricity passes through a...

Easy DIY lamp! Hack an old lightbulb into a alcohol lamp with a green flame with only denatured alcohol and boric acid!



Methanol and bored acid are used for the fuel and flame color. This is deceptively dangerous as you can...

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Barbara Ficalora is a retired elementary teacher. At 86 she reflects on what make a good teacher and recalls memories of her students who still stay in touch over 50 years later.

In this video i salvage an old photo copier for some interesting parts. Their is a nice high voltage transformer, I will be using the high voltage supply for my Marx generator in an upcoming video. I also got some nice mirrors, and a...

The Internet of Things is becoming a reality as goods ranging from cars to refrigerators are brought online. Now 5G promises to accelerate our smart lives, bringing with it new security capabilities but also risks.

Quick whiteboard tutorial showing which explains what the point of binary code in computing is, and why we use it. Can be helpful for students studying GCSE Computer Science.

This program covers the important topic the fundamentals of probability in Probability and Statistics. We begin by discussing what the concept of probability really means and why it is important. Next, we solve several problems that...