For the circuit shown above, the emf of the batteries and the resistances are listed below.  ℰ1 = 48 V, ℰ2 = 7 V, R1 = 13 Ω, R2 = 5 Ω , R3 = 16 Ω.  Determine I1=? Please express your answer in units of Amperes (A) with two decimal places. If you a find a negative value, please don't forget the minus sign.

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.