Windows power shell run commands with timeout

run-processes.ps1

$array = "folder1", "folder2"
cd c:\experiments
Foreach ($element in $array) {echo "Processing $element"; `
$p = $(Start-Process java -ArgumentList "-jar script.jar $element" -RedirectStandardOutput $element\out.log -RedirectStandardError $element\err.log -PassThru);`
if ( ! $p.WaitForExit(1800000) ) 
  { echo "$element did not exit after 30min"; $p.kill() }
}