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There's this question that I dunno how to tackle :| A person throws a cricket ball so that it's path is given by x=20t, y=16t(3-t), where x and y are measured in metres and t in seconds. Find the: a) Initial velocity and the initial angle of projection. b) Find the greatest height reached. c)...

Solve for 0\leq x\leq 2\pi \cos x=\frac{1}{2} I completely forgot how to do these equations. It had something to do with ASTC ..

I was wondering if emf (electromotive force) can be negative? And what formula would you suggest to use for the following question? Q1.2 A model plane has wings that are each 2.55m long. If the plane is travelling at 84.0km/h in a region where Earth's magnetic field has a vertical...

This time, there's only 1 questions haha. Question 1)- I remembered how,so ignore this one :D. Question 2)- Same goes with this one. Question 3)

All clear! ;D Thanks to everyone! Rep added :] Question 1) - Solved, thanks to roadrage75. Question 2) - Solved, thanks to youngminii. Question 3) - Solved, thanks to kurt.physics + jetblack2007. Question 4) - Solved, thanks to gurmies. Question 5) - Solved, thanks to...

Yes. More help >_<""" 1) 2) 3) Don't worry about sketching the graph >.<" I think I can manage that. All for now ^_^

I need full working out :) Or else I'll end up not getting it again ><" Thanks! 1)Simplify 2) A country property increased in value by 12.5% to a new value of $36 000. What was the value of the property before the increase? 3) 4) 5) 6) 7) 8) a) b) Please help D: