Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread is typically 2.0 m in diameter, and the silk has a Young's modulus of 4.0 10 N/m. Assuming that there is no appreciable space between the parallel strands, how many strands N would be needed to make a rope 8.8 m long that would stretch only 1.04 cm when supporting a pair of 91-kg mountain climbers? 6.01 x107 N = Incorrect Again assuming that there is no appreciable space between the parallel strands, what would be the diameter d of the rope? strands 1.55 d = cm Incorrect