Weather & Physics
Why Does Thunder Come After Lightning?
Thunder and lightning happen at the same moment, but light reaches you almost instantly while sound takes about 3 seconds per kilometer.
Light & Atmosphere
Why Is the Sky Blue?
The sky is blue because blue light scatters off air molecules more strongly than red light, filling the daytime sky with scattered blue wavelengths.
It is all about pressure
How Do Airplanes Fly?
Airplanes fly by generating lift with their wings. Air moving over the curved top of the wing travels faster, creating lower pressure that pulls the plane upward.
It is all about spinning electrons
How Do Magnets Work?
Magnets work because electrons in some materials spin in the same direction, creating a collective magnetic field. Here is how that actually produces the force you feel.
It moves heat, it does not make cold
How Does a Refrigerator Work?
A refrigerator does not create cold. It moves heat from inside the fridge to outside. Here is how that works using a circulating refrigerant.
A giant electrical spark
What Is Lightning?
Lightning is a massive electrical discharge caused by charge buildup in storm clouds. Here is why it happens, where it goes, and why thunder follows.
Your body collected charge
What Is Static Electricity?
Static electricity is a buildup of electric charge on a surface. When that charge suddenly discharges, you get a spark or a shock. Here is the simple science behind it.