Science and Medicine

Daily post on science and medicine from @JohnDCook

[Science and Medicine @ScienceTip]

Low-frequency radio waves travel better than high-frequency waves through salt water.

[Science and Medicine @ScienceTip]

Covalent bonds form when two atoms share one or more pairs of electrons.

[Science and Medicine @ScienceTip]

Charles Steinmetz (1865 - 1923) introduced the use of complex numbers in analyzing AC circuits.

[Science and Medicine @ScienceTip]

Oddo–Harkins rule: elements with an even atomic number are more common than those with odd atomic number

[Science and Medicine @ScienceTip]

Jupiter's Great Red Spot is twice the size of Earth.

[Science and Medicine @ScienceTip]

FM radio is analogous to sending messages with a flashlight by varying the color of the light.

[Science and Medicine @ScienceTip]

Physical constants and factorials https://t.co/BMRaUw2s4k

[Science and Medicine @ScienceTip]

AM radio is analogous to sending messages with a flashlight by varying the brightness of the light.

[Science and Medicine @ScienceTip]

Differential equation for LRC circuit has exact same form as a mass-dashpot-spring mechanical system.

[Science and Medicine @ScienceTip]

'Water continually dropping will wear hard rocks hollow.' -- Plutarch, c. 100 AD

[Science and Medicine @ScienceTip]

Faraday discovered in 1831 that changing magnetic fields generate electric currents.

[Terrible Maps @TerribleMaps]

A useful way to tell African and Indian elephants apart

[Science and Medicine @ScienceTip]

Stigler's law and Avogadro's number https://t.co/2fAyjxcglo

[Science and Medicine @ScienceTip]

Oersted discovered in 1820 that electric currents generate magnetic fields.

[Science and Medicine @ScienceTip]

'It's not so easy to free oneself from the idea that coordinates must have an immediate metrical meaning.' -- Albert Einstein

[Science and Medicine @ScienceTip]

There were several competing theories of E&M during Maxwell's lifetime. Maxwell's theory triumphed a decade after he died.

[Science and Medicine @ScienceTip]

Kinetic energy = 1/2 mass * velocity²

[Science and Medicine @ScienceTip]

Maxwell published the laws of E&M as 20 equations. Now in modern notation they are four equations.

[Science and Medicine @ScienceTip]

Technicium is mostly man-made, though traces have been found in nature.

[Science and Medicine @ScienceTip]

Power = work / time