This video demonstrates how to calculate percentages like 50%, 25%, and 75% of a number. You'll start by finding 50% as a starting point, then use it to work out 25% and 75%. Clear, step-by-step examples will guide you through these...

How do we reduce the impact of climate change, and could geoengineering be the solution? Host Sinead Bovell is joined by sci-fi writer Kim Stanley Robinson and other experts to examine the goal of Global Net Zero Emissions, direct air...

Arctic air is warming, causing scientists to worry that melting arctic ice and snow could also lead to a sudden permafrost thaw and release of carbon dioxide (CO2) and methane (CH4) that forms a climate tipping point or feedback loop....

Fresh water issues are getting harder to ignore. In the next five years, half the world’s population will live in a water-stressed area. Drought-stricken cities like San Francisco have started requiring large commercial building to...

Dr. Boyd gives the physics definition of density, then walks you through a demonstration to show how liquids with different densities can form multiple liquid layers in a container.

This video discusses the concept of redshift and the expansion of the universe, starting with the discovery of the universe's expansion through the redshift of light from distant galaxies. It explains the three types of redshift: Doppler...

The video discusses a 2014 U.S. Physics Team exam question about the shape of a cable hanging from a helicopter flying horizontally. The experiment showed that when flying at a constant speed, the rope hangs diagonally to the left due to...

Will this be the last video I make about SI units? Quite possibly. There's something about being so precise and defining the systems within which science works. When we can more accurately and routinely measure a kilogram, a mole, a...

The Born-Haber cycle calculates lattice energy using steps like ionization, electron affinity, and sublimation, showing the energetics of ionic compound formation

Lattice energy is the energy released when ions combine to form an ionic solid. Higher lattice energy indicates a stronger ionic bond and greater stability

A group of jailbreakers recently discovered that the Rabbit R1 codebase contains hardcoded API keys - giving them easy access to user data from their AI tech-to-speech service. Topics Covered: Problems with Rabbit R1 What to when...

Meet Katey Red, the first openly transgender and gay rapper in bounce music. Discover her journey, impact on LGBTQ+ artists, and how she shaped the New Orleans sound.

With a total of 28 medals, Michael Phelps is the most celebrated Olympian of all time. At the height of his career in Rio 2016, he had won no fewer than 23 gold medals, more than twice the number of the second-highest record holder! Now,...

If youre not an alien reading this from a galaxy far, far away, then you have probably heard these terms countless timesRAM and ROM. That being said, RAM is more commonly encountered by the common person. Yet a fair amount of the...

Photoelectric effect occurs when electromagnetic radiation above the threshold frequency of the given metallic surface, strikes the surface and releases electrons from it. This happens because light is made of massless particles called...

Heat capacity is defined as the amount of heat energy required to raise the temperature of a given mass of a substance by one unit. Specific heat capacity and molar heat capacity are properties derived from the heat capacity of a...

Short answer: Yes, drinking a lot of water will certainly change the pH of the stomach, but this amount is trivial. However, since your stomach is very acidic, to begin with, drinking water will not dilute it significantly. Also, there...

Snowflakes come in a seemingly endless variety of shapes and sizes. Two factors play key roles in determining the shape of a snowflake: temperature and humidity. Kenneth Libbrecht, Professor of Physics at the California Institute of...

Pure water doesn’t conduct electricity; by itself, it is a poor conductor of electricity. However, water contains charged ions and impurities that make it a very good conductor of electricity. We are always told and taught that water...

Humidity is simply a measure of how "wet" the air is in a specific place, or the amount of water vapor present in the air. However, it's important to note that humidity is an umbrella term that can refer to three different types of...

Fizzy soft drinks like Pepsi, Coke, and other sodas are popular worldwide, seemingly made of water, sugar, carbon dioxide, and flavor. Their inclusion of caffeine, a stimulant typically associated with morning coffee, sets them apart....

Voltage vs current, or sometimes it's current vs voltage; we are constantly trying to understand the differences between these two entities related to electricity. Then, there is sometimes one more entity: resistance. How do these three...

The term climate change is used to denote the long-term changes in the weather patterns in a given region. Another term often interchanged with climate change is global warming. Global warming is formally defined as a rise in Earth's...

Ageing is a complex process which results from progressive loss of the body’s ability to maintain itself. This ageing comes with diseases and a general decline in health. Over the past few decades, scientists have come to better...