Answer:
Magnetic fields and Electric fields
Explanation:
Answer:
Graphics can sometimes convey more information in a brief amount of space than an author can explain in a paragraph.
Is the something missing from the question
Answer:

Explanation:
From the question we are told that:
Pressure 
Temperature 
Volume 
Heat Produced 
Generally the equation for ideal gas is mathematically given by



Therefore


Since
Heat of combustion of Methane=889 kJ/mol
Heat of combustion of Propane=2220 kJ/mol
Therefore

Comparing Equation 1 and 2 and solving simultaneously




Therefore
Mole fraction 0f Methane is mathematically given as



the answer would be B) Moon