###### Asked in Units of MeasureMetric System

Units of Measure

Metric System

# What is the si unit of buoyancy and how it is defined?

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## Related Questions

###### Asked in Units of Measure, Metric System

### What is the SI unit based on?

In 1960, an international committee got together and determined
the SI system.
The meter (the basic SI unit for length) is defined as the
distance traveled by light in a vacuum during a time interval of
1/299,792,458 second.
The kilogram (the basic SI unit for mass) is defined as the mass
of a specific platinum iridium alloy cylinder kept at the
International Bureau of Weights and Measurements in France.
The second (basic SI unit for time) is defined as 9,192,631,700
times the period of oscillation of radiation from the cesium
atom.

###### Asked in Physics

### Why is a liter a derived unit and not a fundamental unit?

Quite simply, because that's the way the SI was defined. It
really depends on the choice of base units - for the SI, the meter
(a unit of length) was defined as the base unit; meter cubed is the
derived unit for volume. A liter is 1/1000 of that, and is
therefore also derived from the meter.
You can just as well invent a unit of measures in which a
certain volume is the base unit - in this case, the cubic root of
this volume would be the (derived) unit of length. But that is not
how the SI was defined; presumably, they thought it easier to use a
length as the base unit.

###### Asked in Science

### What is the basic unitof mass?

###### Asked in Science, Physics, Isaac Newton

### What is one Newton defined as?

That's the SI unit of force. It is defined by Newton's Second
Law: it is the force required to give a mass of 1 kilogram an
acceleration of 1 meter/second2.
That's the SI unit of force. It is defined by Newton's Second Law:
it is the force required to give a mass of 1 kilogram an
acceleration of 1 meter/second2.
That's the SI unit of force. It is defined by Newton's Second Law:
it is the force required to give a mass of 1 kilogram an
acceleration of 1 meter/second2.
That's the SI unit of force. It is defined by Newton's Second Law:
it is the force required to give a mass of 1 kilogram an
acceleration of 1 meter/second2.

###### Asked in Physics

### Why is the unit of mass a fundamental unit?

If you mean in the SI, it is defined to be a fundamental
unit. Consider, for example, Newton's Second Law (force = mass x
acceleration), used to define force as a derived unit in the SI.
Acceleration is already a derived unit (derived from distance and
time) - let's keep it this way, for the sake of discussion. Now, in
SI units, force is defined to be derived from mass (and
acceleration). Mass is the "fundamental" unit, and force is the
"derived" unit. The same relationship, i.e. Newton's Second Law,
could just as well have been used the other way round. That is,
force could have been defined as the fundamental unit, and mass
derived from force (and acceleration). The creators of SI basically
defined certain units as "base units" because they could be defined
with a high degree of precision.

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