How do conduction and convection differ? (4 points) Conduction can move through empty space to transfer heat; convection cannot.

Conduction does not require objects to have direct physical contact; convection does.

Conduction requires objects to have direct physical contact; convection does not.

Conduction transmits heat through electromagnetic waves; convection does not. PLS HELP

When would a bouncy ball have the most potential energy

Consider this initial-rate data at a certain temperature for the reaction described by

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.