Answer:

Explanation:
= Stefan-Boltzmann constant = 
T = Surface temperature of the Sun = 5778 K
r = Radius of the Sun = 696000 km
From Stefan-Boltzmann law

Power is given by

The power output of the Sun is 
I believe the answer is free electrons
Answer:
Electrons are so small that it does not affect the mass of atom .
Explanation:
Electrons are much smaller in mass than protons, weighing only 9.11 × 10^-28 grams, or about 1/1800 of an atomic mass unit. Therefore, they do not contribute much to an element's overall atomic mass.
Unit of measurement are globally recognized and necessary for sharing information between scientists around the world.
An accepted quantity that is used to represent a physical quantity is called a measurement unit. A unit of measurement is a specific magnitude of a quantity that has been established and recognized by law or convention and is used as a benchmark for measuring other quantities of the same kind. A multiple of the unit of measurement can be used to express any other quantity of that type. A length is an example of a physical quantity.
A unit of measurement is a specific magnitude of a quantity that has been established and recognized by law or by convention and is used as a reference for measuring other quantities of the same kind.
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