Every solutions for problem 3 and 4 that we receive from May 1, 2012 to May 28, 2012 will get -10% deduction. 

Every solution that we received after May 11, 2012 for problems 1 and 2 will get -20% deduction.

There is a correction for problem 6 part 5.

In the problem the period is claimed to be T = v_0/λ. It should be T = λ/ v_0.

We still accepting solutions for problem 1 and 2 after April 3rd, 2012. Solutions that we get after April 3rd, 2011 will only get 10% point deduction from your total point of the particular problem.

Problem 6 already online

Due to a lot of participants have difficulties uploading solutions for problem 1 and 2, because the file size is exceed 1 MB. The deadline for uploading solutions for problem 1 and 2 extended to April 3rd, 2012. If there is still a problem uploading the solutions, the solution could be send by e-mail to wopho.selection@stkipsurya.ac.id

Problem 5 already online and could be download at WoPhO selection round website. 

Dear WoPhO Participants,

There are Serbian translation for problems 3 and 4 at WoPhO Selection Round website. Participant who need Serbian translation could download them at WoPhO Selection Round website

In problem 4, paragraph between section 1.E and 1.D. The specific heat of water c_w should be 4200 J/(K kg).

There a correction for problem 2. Part 4.A.1 printed twice. The second one should be part 4.A.2. You could download the latest version at WoPhO selection round website.

Problems 3 and 4 already uploaded. The deadline for problems 3 and 4 is April 30, 2012

Problem 2 Loaded Hoop on conveyor belt.

Part 3. μ_s   is coefficient of static friction and μ_k is coefficient of kinetic friction.

The 2nd WoPhO Selection Round already started on February 1st, 2012.

Before register for the Selection Round, please read the rules.

The previous WoPhO problems and result could be seen at WoPhO About