2026 Science III - Stats and Dates

As with electricity, there are [#] types of opposite “charge” for magnetism. (pg56)

2

A wire with electric current running through it creates a magnetic field. This was first observed in [YEAR] by Hans Christian Oersted, who noticed that a wire with current running through it would deflect a compass. (pg61)

1820

If you still have a hard time imagining the ground potentially being seen as a moving frame of reference, recall that the Earth itself is spinning around, [#] times per day. (pg63)

1 (duh)

And the entire Earth is moving at [#] mph relative to the Sun, as the Earth travels in its circular orbit. (pg63)

70,000

Our entire solar system is orbiting the center of the Milky Way galaxy at over [#] mph. (pg63)

100,000

It is unknown exactly when the first compass was invented, but compasses were in use in China for navigational purposes as far back as the [CENTURY]. (pg65)

11th

The magnetic poles are switched every once in a while, ranging from [#] years to [#] years, seemingly with no pattern to it. (pg67)

1,000; 100,000

Unlike the Earth, the Sun’s magnetic pole switching happens with some regularity, about every [#] years. (pg69)

11

The next solar maximum is in [MONTH, YEAR], so in recent months we have seen increased solar activity, with faint aurora sometimes being visible at unusually low latitudes. (pg69)

July, 2025

As usual, the standard amount of the unit is huge; it is very rare that you will ever encounter a magnetic field anywhere near [#] Teslas. (pg71)

1

The strength of Earth’s magnetic field, which is enough to turn compasses, ranges from [#] to [#] microTeslas. (pg71)

25; 65

The magnetic force is inherently a [#]-dimensional force. (pg72)

3

The magnetic force vector FB is always perpendicular to the [#]-dimensional plane containing vectors v and B. (pg72)

2

An experiment similar to a mass spectrometer was what led to the discovery of the electron itself by J. J. Thomson in [YEAR]. (pg74)

1897

The currents in an MRI machine are high enough to produce a magnetic field between [#] and [#] Telsa, which is actually very powerful. (pg77)

1; 2

A steady magnet cannot generate current; instead, you need a changing magnetic field. This extremely useful fact was discovered by Michael Faraday in [YEAR]. (pg78)

1831

As the film in a cassette tape cycled through the tape player, the shifting magnetic field could be interpreted by a circuit inside as a series of [#]’s and [#]’s that would tell the player what sound to play. (pg80)

0; 1

The voltage across power lines can be many thousands of volts, but the voltage of the electrical outlet in your wall is only [#] V. (pg82)

120

The voltage across many miles of wire can be [#]s of volts. (pg82)

10,000

The first electric light was invented in [YEAR] by Frank Hauksbee. (pg86)

1705

The first electric light to see widespread use was the arc lamp, which was invented by Humphrey Davy around [YEAR]–[YEAR]. (pg87)

1802; 1809

The process of building arc lamps was refined over time, and by the [DECADE], many cities were lit up with arc lamps. (pg87)

1860s

In [YEAR], Edison lit up part of New York City with his direct current lightbulbs. (pg88)

1882

In [YEAR] Mikhail Dolivo-Dobrovolsky invented a [#]-phase generator. (pg89)

1891; 3

In [YEAR], the inventors Alexander Just and Franjo Hanaman created the tungsten lightbulb. (pg89)

1904

Unlike many charlatans, Tesla did actually invent real things, one of which is the Tesla coil, which he first demonstrated in [YEAR]. (pg89)

1891