The mathematics of sidewalk illusions

Have you ever come across an oddly stretched image on the sidewalk, only to find that it looks remarkably realistic if you stand in exactly the right spot? These sidewalk illusions employ a technique called anamorphosis — a special case of perspective art where artists represent 3D views on 2D surfaces. So how is [...]

Revise for your JC year-end exams with us!

Ace your JC1 Promotional Exams with us! The JC1 Promotional Exam Preparatory Classes are now open for registration! We cover the most subjects in Singapore: Biology, Chemistry, Economics, General Paper, Mathematics, Physics and History. Soon, you will sit for your promotional exams, and it is important to ask yourself - [...]

The Physics of Drifting, Explained

Here's an in-depth look at the physics of drifting from Business Insider: Car drifting is both a pastime and profession. For hobbyists and professionals, the basic principles of drifting are the same. Toss the car sideways and hang on. We wanted to take a deeper look into the activity. We asked Leona Chin, a professional [...]

Making Sense of Irrational Numbers

Like many heroes of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or disrupt a sacred ritual? No, Hippasus's transgression was mathematically proving the hitherto unprovable. Ganesh Pai describes the history and math behind irrational numbers. Lesson by Ganesh [...]

The Chemistry of Cookies

You might not believe it, but there's chemistry in baking cookies. You stick cookie dough into an oven, and magically, you get a plate of warm, gooey cookies. Except it’s not magic; it’s science. Stephanie Warren explains via basic chemistry principles how the dough spreads out, at what temperature we can kill salmonella, and [...]

Why Do Compressed Air Cans Get Cold?

This video is about compressed air cans (aka gas dusters) and why they get cold when you spray them. They cool off because the refrigerant inside (1,1-difluoroethane) is under pressure and boils off when the pressure lowers, and energy lost to the latent heat of vaporization cools the can a lot. Difluoroethane normally boils at [...]

How sugar affects the brain

When you eat something loaded with sugar, your taste buds, your gut and your brain all take notice. This activation of your reward system is not unlike how bodies process addictive substances such as alcohol or nicotine -- an overload of sugar spikes dopamine levels and leaves you craving more. Nicole Avena explains why [...]

Specialised HCI Economics Classes at Bukit Timah

Term 2 is a challenging time for J2 HCI students because the school is embarking on “flipped learning” (see point 5) which essentially means the students are left largely on their own with no lectures or tutorials for the topic “Firms and Market Structures”. This is a topic with quite a number of difficult concepts [...]

Grit: the power of passion and perseverance

What separates successful students from those who struggle: GRIT? In this Ted video, Angela Lee Duckworth explains her theory of "grit" as a predictor of success. But what is "grit"? Grit is passion and perseverance for very long term goals.