Energy questions if you dk dont awnser -
Energy transfer occurs when a warmer object is in contact with a cooler one.
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Energy transfer when a electrical source is connected in a complete circuit to an electrical device.
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Energy transfer can be transferred through matter or empty space via -

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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.