To determine the correct unit of measurement for Newton in the context of the International System of Units (SI), let's consider the definitions and relationships of the physical quantities involved:
1. Temperature:
- Temperature is a measure of the thermal energy or heat within a substance.
- The SI unit for temperature is the Kelvin (K).
2. Weight:
- Weight is the force exerted by gravity on an object.
- The Newton (N) is the SI unit for force.
- Weight can be calculated as mass (m) multiplied by the acceleration due to gravity (g), which gives us a force.
- Thus, weight is measured in Newtons.
3. Mass:
- Mass is the amount of matter in an object.
- The SI unit for mass is the kilogram (kg).
4. Density:
- Density is the mass per unit volume of a substance.
- The SI units for density are kilograms per cubic meter (kg/m^3).
Given these definitions, among the provided options:
- The Newton cannot be the SI unit for temperature, mass, or density.
- Given that weight is a force, it aligns with the definition where Newton is the SI unit of force.
Therefore, the correct answer is:
- Weight
The Newton is the SI unit for weight.
