The tensile strength and number-average molecular weight for two poly(methyl methacrylate) materials are as follows: Tensile Strength (MPa) Number-Average Molecular Weight (g/mol) 36 30,000 150 50,000

Estimate the tensile strength (MPa) at a number-average molecular weight of 43,000 g/mol
Express your answer with three significant figures.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?