The following are fundamental units except.
kelvin
newton
radian
seconds
http://physics.nist.gov/cuu/Units/units.html
Seconds
To determine which of the given units is not a fundamental unit, we must first understand what fundamental units are. Fundamental units, also known as base units, are independent units of measurement that cannot be expressed in terms of other units. These units serve as the building blocks for constructing other derived units.
In the International System of Units (SI), there are seven fundamental units:
1. Meter (for length)
2. Kilogram (for mass)
3. Second (for time)
4. Ampere (for electric current)
5. Kelvin (for temperature)
6. Mole (for amount of substance)
7. Candela (for luminous intensity)
Given the options:
1. Kelvin - Kelvin is a fundamental unit and measures temperature.
2. Newton - Newton is not a fundamental unit; it is a derived unit that measures force. Force is expressed as the product of mass and acceleration, which are measured in kilograms and meters per second squared, respectively.
3. Radian - Radian is not a fundamental unit either, but rather a derived unit that measures plane angle. Radians are defined in terms of the ratio between the length of an arc and the radius of a circle.
4. Seconds - The second is a fundamental unit and measures time.
Therefore, the answer is "newton" as it is the only option that is not a fundamental unit.