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Weather: Upper-Air Observations

Upper-Air ObservationsWeatherMeasuring the AtmosphereThe Take on TemperatureIs the Pressure Getting to You?The Wind in the WillowsIt's Not the Heat, It's the HumidityMeasuring the RainPlacing the…

What's a carat?

The Question: In diamond measurement, what is a carat? The Answer: One carat is equal to 200 milligrams. It's a useful measurement for dealing…

Weather: It's Not the Heat, It's the Humidity

It's Not the Heat, It's the HumidityWeatherMeasuring the AtmosphereThe Take on TemperatureIs the Pressure Getting to You?The Wind in the WillowsIt's Not the Heat, It's the HumidityMeasuring the…

pound

(Encyclopedia) pound, abbr. lb, unit of either mass or force in the customary system of English units of measurement. Two different pounds of mass are defined, one in the avoirdupois system of units…

Bounty, British naval vessel

(Encyclopedia) Bounty, British naval vessel, a 220-ton (200-metric-ton), 85-ft (26-m) cutter, commanded by William Bligh. She set sail for the Pacific in Dec., 1787, to transport breadfruit trees…

Weather: The Wind in the Willows

The Wind in the WillowsWeatherMeasuring the AtmosphereThe Take on TemperatureIs the Pressure Getting to You?The Wind in the WillowsIt's Not the Heat, It's the HumidityMeasuring the RainPlacing the…

The Nautical Knot

The Question: I need to know about nautical knots. Before computers, how did sailors measure them? Why are they called "knots" in the first place…

Earthquakes!

About 8,000 mini-quakes a day, and on average, one exceptionally big one per year by Borgna Brunner Earthquakes in residential areas, such as this 1964 one in Seward, Alaska, can…

Geometry: Proving Angles Are Congruent

Proving Angles Are CongruentGeometryProving Segment and Angle RelationshipsExploring MidpointsHow Many Midpoints Are There?Proving Angles Are CongruentUsing and Proving Angle ComplementsUsing and…

Eratosthenes

(Encyclopedia) EratosthenesEratosthenesĕrətŏsˈthənēz [key], c.275–c.195 b.c., Greek scholar, b. Cyrene. A pupil of Callimachus in Athens, he became (c.240 b.c.) head of the library at Alexandria.…