The drop_last generator takes one iterable and one int as a parameter (call it n): it produces every value from the iterable except for the last n values (without being able to count how many values the iterable produces) hint: i used an explicit call to iter and a while loop and a comprehension that creates a list that stores at most n values (so that data structure is allowed here). for example for i in drop_last('combustible', 5): print(i, end='') prints combus; if the iterable produces < n values, it terminates immediately, on the first call to next.

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.