Answer:
Thallium is an isotope name that has a mass number of 201
<span>a) The strong nuclear force
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Explanation:
The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
the answer is option D "people emphasized obtaining knowledge through scientific experiments" (on plato)
