Alexander Selkirk answered
Yes, the atmosphere burns up some meteorites before they impact, but the atmosphere has another effect on meteor craters. The weather on the Earth wears down, fills in and smooths over craters so that after a few thousand years most of them are not visible any more.  The Moon has no atmosphere, no weather so even … Read more
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Alexander Selkirk answered
An acre is a unit of measure of land area in the US customary system of weights and measures.  An acre equals 43 560 ft2 or 1/640 of a square mile.  An acre equals 4046.8564224  m2
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Alexander Selkirk answered
The polar bear (Ursus maritimus) is a bear native to the Arctic Ocean and its surrounding seas.  The Arctic Ocean surrounds the North Pole.  Antarctica is the continent surrounding the South  Pole, a world away.  There are no Polar Bears there.
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Alexander Selkirk answered question
Yes.  Everything will freeze if it gets cold enough. Different substances have different freezing temperatures.
Grain alcohol freezes at  −114.3 °C,  -174 °F.
Mercury freezes at -38.83 C,  -37.89 F .
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Alexander Selkirk answered question
One US liquid gallon of pure water at 3.98 deg C  weighs  8.345638 pounds Avoirdupois.
You may see a slightly different number elsewhere.  This one is based on the best measurement for the density of water that I can find; 1.000028  kilograms per liter.
Both the US pound and the US gallon are defined in terms … Read more
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Alexander Selkirk answered question
You could make your own using Excel.
Column A  enter  0.001 in A1 then fill down in a series,(on the Edit tab)
step value =0.001
Column B  formula  =A1 * 32 (if you wanted thousandths expressed in 32d of an inch, or 16ths or 64ths or whatever fraction of an inch you want.)
Then column B fill down
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Alexander Selkirk answered
The classic functions of money are:
1) Exchange of value.  You work or sell some product for money which you use to buy things you want.
2) Store of value.   Money doesn't evaporate or decompose so you can keep it until you want to spend it, in cash at home or in a bank.
3) Standard of … Read more
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Alexander Selkirk answered question
An acre is a unit of area and a linear foot is, well, linear, that is, in a line.
Area is measured in square feet.  There are 43 560 square feet in an acre.
For unit conversion in the future, you could bookmark the NIST handbook on this subject, found here
In anyRead more
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Alexander Selkirk answered question
An equation means that two numbers on either side of the equals sign are equal to start with. Those two numbers are described by the two expressions. You have to  keep them equal.  You add, subtract, multiply or divide by the same number on both sides.  You do whatever you need to do to get the unknown by … Read more
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Alexander Selkirk answered question
When measuring electrical energy, we remember that a watt = one joule per second. In other words, one watt-second equals one joule.
Watt-seconds or using another unit of time, the Watt-hour or the Kilowatt-hour are commonly used units of energy for electricity. One kilowatt-hour ( kWh) is equal to 3 600 000 joules. (3.6 … Read more
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Alexander Selkirk answered
There are  3.280839895013  feet in a meter.  This works out to 39.37007874016 inches.

The foot is defined as 0.3048 meters exactly.  That means that you can use this number in calculations to any number of decimal places that you need.  The government agency which determines standards of measurement for the US is the … Read more
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Gold is measured in Troy ounces which have a mass of  31.1034768  grams, NOT Avoirdupois ounces which have a mass of 28.349523125 grams.

So then, 38 divided by 31.1034768  equals  1.221728  troy ounces.  But your necklace is not likely to be pure gold. It could be 22 … Read more
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