Entropy concept
Why can’t heat flow from a colder body to a hotter one naturally?
Capacitance basics
Why are capacitors used in camera flashes?
Transformers
How do transformers help reduce electricity bills during transmission?
Eddy currents
Why do bullet trains use eddy-current braking systems?
Superconductors
Why are superconductors a big deal in modern physics?
Faraday’s law
How does a bicycle dynamo light up your headlamp without batteries?
Total internal reflection
Why do diamonds sparkle so much?
Lenses
Why do my spectacles fog up when I come indoors from the cold?
Photoelectric effect
Why do automatic doors open when you walk up to them?
Nuclear fusion
Why is fusion considered the “holy grail” of clean energy?
Lasers in medicine
How do lasers perform delicate eye surgeries without cutting?
Uniform motion
A train moves at 60 km/h for 2 hours. Is its motion uniform?
Non-uniform motion
A cyclist speeds up, slows down, and turns corners. Is this uniform motion?
Distance vs displacement
If you jog 200 m around a circular park and return to the starting point, what’s your distance and displacemen...
Average speed
You drive 30 km at 60 km/h and another 30 km at 30 km/h. Is your average speed 45 km/h?
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