12. In the diagram below, what is the current through the lamp when the
pen; when the switch is closed? (Hint: you can just use Ohm's
law here]

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)