<span>Energy of an electromagnetic wave depends on it's "Frequency"
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Answer:
None of the above
Explanation:
When energy is converted from one form to another in a chemical or physical change, none will change. This is due to the law of conservation of energy. It states that the total energy of the system remains constant. It only changes energy from one form of energy to another. So, the correct option is (d) "none of the above".
Answer:
The answer is A)
Explanation:
An ionic compound is formed when one atom donates one or more electrons to one or more atoms of another element. Calcium has two valence electrons, which are donated to an atom of oxygen. So, an ionic compound is formed in the reaction involving one calcium atom with an oxygen atom.
We need to find the time it takes an electron to move in the given circuit.
The time taken for electrons to reach the starting motor from the battery is 60.65 minutes.
I = Current = 134 A
= Avogadro's number = 
A = Area = 
L = Length = 92.2 cm
= Density of copper = 
M = Molar mass of copper = 63.5 g/mol
= Number of valence electrons of copper = 1
e = Charge of electron = 
Number of charge carriers per unit volume is given by
Time taken is given by
The time taken for electrons to reach the starting motor from the battery is 60.65 minutes.
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