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Hey braintic, thank you for your reply but i tried applying everything you provided but kept getting answers not in the MC options. I kept getting -2.98 a lot.

A point moving with simple harmonic motion starts from a point 5 cm from the centre of the motion with a speed of 1 cm/s. The period is 8 seconds. What is the maximum acceleration? A) 4.9 B) 5.2 C) 24.4 D) 25.6 Could anyone help me with this question plsss:frown2:

all i can say is the oxford one is no good. sometimes my teacher gave us photocopies from spotlight which include some succinct summaries best to just get all the good handouts from your teacher

Re: 2015 HSC Economics Marathon For this question, Evaluate the effectiveness of regulations compared with market-based policies in achieving environmental sustainability. Other than talking about how regulations do not spark innovation for new environmentally-friendly production methods...