Answer:
A, C, and D
Explanation:
The correct options that apply to the principal conservation of energy are A, C, and D.
A is correct because energy can neither be created nor destroyed. However, energy can be transfered from one location to another or be converted from one form to another. <em>Whether transferred to converted, the magnitude remains the same.</em>
C is correct because energy cannot be destroyed but can be transferred or converted. <em>Hence, if a body or a location loses temprature, then the loss is being gained by another body or location.</em>
D is also correct. A closed system is a system that does not exchange matter with its surroundings. <em>Hence, the total energy remains the same within the system. </em>
Answer: 
Explanation:
Molarity is defined as the number of moles dissolved per liter of the solution.
Normality is defined as the number of gram equivalents dissolved per liter of the solution.
Thus 
How many cycles happen in a given unit of time is called a wave's frequency.
Answer:
radiation
Explanation:
Radiation is light. the lamps above are producing heat through the light.
Answer:
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