Book: principle of electric circuits 9th edition by thomas L. floyd

Questions:
ch8, section 4, Q7,8,9,11,15 and 17 need help quick!

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

What can you increase the strength of an electromagnet by

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?