Molecular weight data for some polymer are tabulated here. molecular weight range (g/mol) xi wi 2 - 35000 0.04 0.01 35000 - 5 0.07 0.04 5 - 65000 0.16 0.11 65000 - 8 0.26 0.24 8 - 95000 0.24 0.27 95000 - 11 0.12 0.16 11 - 125000 0.08 0.12 125000- 14 0.03 0.05 compute the following: (a) the number-average molecular weight. entry field with incorrect answer 73800 g/mo

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.