Recent posts | Physics Core

Illustration showing a smug student on the left, a chalkboard with a right triangle labeled with sides 1 and i and a calculation leading to hypotenuse equals zero in the center, and a shocked Pythagoras on the right, representing misuse of mathematical formulas outside their valid domain.

Unit systems in physics and why we use them

A viral math meme reveals a serious lesson: without consistent unit systems, equations lose their meaning. Learn why physics depends on SI units and dimensional consistency.

Classical Physics

Physics Core

5 days ago

Illustration titled “Acceleration Unit” showing the formula 𝑎 = Δ 𝑣 / Δ 𝑡 a=Δv/Δt and the unit expression 𝑚 / ( 𝑠 ⋅ 𝑠 ) = 𝑚 / 𝑠 2 m/(s⋅s)=m/s 2 . A hand holding a feather quill appears on the right side against a soft blurred background.

What does 'seconds squared' mean in acceleration units (m/s²)?

Why does acceleration use “seconds squared”? We break down the m/s² unit step by step and show what it really means in everyday motion

Classical Physics

Physics Core

Jan 23

Round tabletop mirror reflecting a wooden chess piece, with a darker background visible in the reflection and a brighter surface in the foreground.”

Can a mirror reflect the darkness?

Shadows in mirrors are not darkness bouncing back at us. They are patterns of missing light, faithfully preserved by reflection.

Classical Physics

Physics Core

Jan 21