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oi 7 is c...pacemakers regulate heartbeats by sending electrical impulses to the heart muscle, causing it to contract (beat)...thats a deffinition out of a text book...so they can't be lying!!!...or can they??

the exam wasn't as easy as i had expected...and i swear we neva did the Am/FM radio prac. disasters option was good though i thought...i wrote like nearly 5 pages for the 7mark question on earthquakes and bushfires...so yeh all up i rekon i'll get a band 6...well at least i hope...

question 11 question 11 isnt b, coz the message is transmitted as an electromagnetic wave, the answer is c coz it is transformed from EM to electrical when it is received, but apart from that answer i agree with all your otherss and i reckon i went good so yeh...

q5 is c coz it asked wats davy's theory, not the current theory. he was the dude that sed acids must have hydrogen

these r my answers to the multiple choice... 1.c 2.c 3.d 4.a 5.c 6.b 7.c 8.a 9.d 10.b 11.c 12.b 13.d 14.b 15.a these r pretty similar to urs...so hopefully we r doin ok