Derived quantities depend on.( fundamental)..........physical quantity
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Answer:
Explanation:
Given
Radioactive material is found to decrease 40% of its original value in
Sample at any time is given by
where,
Put values
Taking natural logarithm both side
A and b!
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Answer: Explanation:
If the number of electrons is equal to the number of protons then the atom is uncharged and is electrically neutral. However, atoms can gain or lose electrons: increasing or decreasing the negative charge. Ionisation is the addition or removal of an electron to create an ion. ..Gaining an electron creates a negative ion.
Electricity is a term used to describe the energy produced (usually to perform work) when electrons are caused to directional (not randomly) flow from atom to atom. ... This movement of electrons between atoms is called electrical current.