physics

16 articles · All tags

• How Hydraulics Work: Pascal's Principle Explained
  Pascal's principle says pressure applied to a confined liquid passes equally in all directions, so a small piston can produce a much larger force on a bigger one.
• Why Curveballs Curve: The Magnus Effect Explained
  The Magnus effect is the sideways or vertical force a spinning ball feels in air, and it is why a curveball bends and a backspun fastball falls less than expected.
• Why Is Ice Slippery? The Thin Liquid Layer Explained
  Ice is slippery because a thin, disordered layer of water on its surface acts like a liquid even below freezing, since surface molecules have missing bonds.
• How Do Airplanes Fly? The Physics of Lift Explained
  Wings generate lift by deflecting air downward and creating lower pressure above the wing. Here is how angle of attack, speed, and wing shape make flight work.
• How GPS Works
  How a receiver on Earth calculates position from satellite signals — trilateration, atomic clocks, and the relativistic corrections that keep the system honest.
• The Gyroscope
  Why a spinning wheel resists being turned — angular momentum, precession, and the sensors that guide everything from bicycles to spacecraft.
• How Solar Cells Work
  The photovoltaic effect: how a silicon junction turns photons into current, why panel efficiency sits near 20%, and what actually limits it.
• Fiber Optics and Total Internal Reflection
  How light is trapped inside hair-thin glass strands by total internal reflection — the physics that carries the internet as pulses of light.
• How Loudspeakers Work
  From amplifier current to sound pressure: the moving-coil driver, why cabinets matter, crossovers, and the physics that limits every speaker no matter its price.
• How Microwave Ovens Heat Food
  A microwave oven heats by rotating polar molecules in an alternating electric field — why water heats, why ice is slow, why plates stay cool, and what the metal warnings mean.
• Quantum Computing
  What a quantum computer actually is — qubits, superposition, entanglement, and interference — and which problems it will and will not revolutionize.
• Electromagnetic Spectrum
  The continuous range of electromagnetic radiation from radio waves to gamma rays, classified by frequency and wavelength.
• Heisenberg Uncertainty Principle
  The quantum mechanical limit on the simultaneous precision of position and momentum measurements: Δx·Δp ≥ ħ/2.
• Newton's Laws of Motion
  The three laws of classical mechanics — inertia, F = ma, and action–reaction — that form the basis of classical physics.
• Maxwell's Equations
  The four equations that unify electricity and magnetism and predict electromagnetic waves traveling at the speed of light.
• Wave–Particle Duality
  The quantum-mechanical fact that entities such as light and electrons exhibit both wave-like and particle-like behavior depending on the experiment.