In order for the aluminium bar to have its rate of conduction increased, which of the following changes should be made?
A. Increase its length
B. Increase its thickness
C. Decrease its thermal conductivity
D. Decrease the temperature gradient

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air