A0.013 rubber stopper attached to a 0.93 string is swung in a circle if the tension in the string is 0.35 what is the period of the stoppers motion 1.2 0.45 0.59 1.8

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