How long may it take for a non-renewable resource to be replaced?

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

Which is true according to the law of conservation of energy

Which element below could be and isotope of this atom