What are 3 units outside the metric system that are accepted for use in the metric system?

Question

I'm working on a science paper and the question is no where to be found.

Answer 1

The base unit of time, the second, is not metric, even though it is a fundamental part of the metric-based SI units. The metric unit of time, the milliday (or metric "minute"), was experimentally used during the French Revolution in conjunction with a ten "hour" (properly deciday) day, but never became popular.

Both major forms of angular measurement, the degree and the radian, are also not metric, but are widely used with the metric system. The metric unit of angle measure is the gradian, of which there are a hundred in a circle.

Answer 2

I guess you mean the answer is nowhere to be found. You already have the question -- unless you mean that you have never seen this question anywhere because it's unanswerable, on the basis that something is either in a system of measurement or it isn't. If it isn't, it has to be converted into a usable form that fits within the system.

I hope that's clear.

If anyone knows anything better I would also be glad to know about it.

EDIT: DavidK, that's brilliant. It's good to learn something new every day...Thanks. Tammi -- litres and tonnes are metric.(Hope I'm right there!)

Answer 3

The metric system is decimal, in the sense that all multiples and submultiples of the base units are factors of powers of ten of the unit. Fractions of a unit (e.g. 29/64) are not used formally. The practical benefits of a decimal system are such that it has been used to replace other non-decimal systems outside the metric system of measurements; for example currencies, time and dates.

The simplicity of decimal prefixes encouraged the adoption of the metric system. Clearly the advantages of decimal prefixes derive from our using base 10 arithmetic, a consequence of our happening to have 10 digits (fingers and thumbs). At most, differences in expressing results are simply a matter of shifting the decimal point or changing an exponent; for example, the speed of light may be expressed as 299,792.458 km/s or 2.99792458×108m/s.

Answer 4

a gram: the official unit in the kilogram (1'000 grams), the gram is not an official unit. In theory this should be called a "millikilogram"...

many units of time measurement. In theory the second is the only official time measurement unit, and people should work in powers of ten of it. For sub-second they do it (milliseconds, microseconds) but for over a second they don't and still use minutes, hours, days, years, etc.

degrees Celsius. The official unit is the degree Kelvin. Both have the same magnitude (1 more degree Celsius or Kelvin is the same thing), but the scales don't have the same 0: for Kelvin it is the absolute zero, for Celsius it is the triple point of water (about 273.15 degrees Kelvin).

Hope this helps

a

Answer 5

Minute, hour, day, litre and tonne to name a few.

There is a good article on this at Wikipedia which I have referenced for you below. Best of luck with your paper!

Answer 6

Hours, minutes, seconds

Answer 7

I'm pretty sure that England uses
Feet, "Yards, Square Yards", Miles.
Don't know any others.

Answer 8

Candela, lumen, kelvin i guess