Warning (2): file_put_contents(/home/pdemos/sales.physicsdemos/logs/debug.log): failed to open stream: Permission denied [CORE/src/Log/Engine/FileLog.php, line 133]
file_put_contents - [internal], line ??
Cake\Log\Engine\FileLog::log() - CORE/src/Log/Engine/FileLog.php, line 133
Cake\Log\Log::write() - CORE/src/Log/Log.php, line 384
Cake\Log\Log::info() - CORE/src/Log/Log.php, line 517
App\Controller\AppController::beforeFilter() - APP/Controller/AppController.php, line 146
App\Controller\PagesController::beforeFilter() - APP/Controller/PagesController.php, line 100
Cake\Event\EventManager::_callListener() - CORE/src/Event/EventManager.php, line 416
Cake\Event\EventManager::dispatch() - CORE/src/Event/EventManager.php, line 393
Cake\Controller\Controller::dispatchEvent() - CORE/src/Event/EventDispatcherTrait.php, line 110
Cake\Controller\Controller::startupProcess() - CORE/src/Controller/Controller.php, line 502
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 114
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 93
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 60
[main] - ROOT/webroot/index.php, line 36
Warning: file_put_contents(/home/pdemos/sales.physicsdemos/logs/error.log) [function.file-put-contents]: failed to open stream: Permission denied in /home/pdemos/sales.physicsdemos/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 133
Warning (2): file_put_contents(/home/pdemos/sales.physicsdemos/logs/audit.log) [<a href='https://secure.php.net/function.file-put-contents'>function.file-put-contents</a>]: failed to open stream: Permission denied [CORE/src/Log/Engine/FileLog.php, line 133]
file_put_contents - [internal], line ??
Cake\Log\Engine\FileLog::log() - CORE/src/Log/Engine/FileLog.php, line 133
Cake\Log\Log::write() - CORE/src/Log/Log.php, line 384
Cake\Log\Log::info() - CORE/src/Log/Log.php, line 517
App\Controller\AppController::beforeFilter() - APP/Controller/AppController.php, line 146
App\Controller\PagesController::beforeFilter() - APP/Controller/PagesController.php, line 100
Cake\Event\EventManager::_callListener() - CORE/src/Event/EventManager.php, line 416
Cake\Event\EventManager::dispatch() - CORE/src/Event/EventManager.php, line 393
Cake\Controller\Controller::dispatchEvent() - CORE/src/Event/EventDispatcherTrait.php, line 110
Cake\Controller\Controller::startupProcess() - CORE/src/Controller/Controller.php, line 502
Cake\Http\ActionDispatcher::_invoke() - CORE/src/Http/ActionDispatcher.php, line 114
Cake\Http\ActionDispatcher::dispatch() - CORE/src/Http/ActionDispatcher.php, line 93
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 60
[main] - ROOT/webroot/index.php, line 36
Warning: file_put_contents(/home/pdemos/sales.physicsdemos/logs/error.log) [function.file-put-contents]: failed to open stream: Permission denied in /home/pdemos/sales.physicsdemos/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 133
Warning (2): file_put_contents(/home/pdemos/sales.physicsdemos/logs/error.log) [<a href='https://secure.php.net/function.file-put-contents'>function.file-put-contents</a>]: failed to open stream: Permission denied [CORE/src/Log/Engine/FileLog.php, line 133]
if (!$mask) {return file_put_contents($pathname, $output, FILE_APPEND);}
$level = 'warning'
$message = 'Headers already sent in /home/pdemos/sales.physicsdemos/vendor/cakephp/cakephp/src/Error/Debugger.php:850'
$context = [
'scope' => []
]
$output = '2025-07-08 11:35:33 Warning: Headers already sent in /home/pdemos/sales.physicsdemos/vendor/cakephp/cakephp/src/Error/Debugger.php:850
'
$filename = 'error.log'
$pathname = '/home/pdemos/sales.physicsdemos/logs/error.log'
$mask = null
file_put_contents - [internal], line ??
Cake\Log\Engine\FileLog::log() - CORE/src/Log/Engine/FileLog.php, line 133
Cake\Log\Log::write() - CORE/src/Log/Log.php, line 384
Cake\Log\Log::warning() - CORE/src/Log/Log.php, line 469
Cake\Http\Response::sendHeaders() - CORE/src/Http/Response.php, line 517
Cake\Http\Response::send() - CORE/src/Http/Response.php, line 492
Cake\Routing\Dispatcher::dispatch() - CORE/src/Routing/Dispatcher.php, line 65
[main] - ROOT/webroot/index.php, line 36
Warning: file_put_contents(/home/pdemos/sales.physicsdemos/logs/error.log) [function.file-put-contents]: failed to open stream: Permission denied in /home/pdemos/sales.physicsdemos/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 133 The Education Group - Home
The Video Encyclopedia of Physics Demonstrations is a valuable resource presenting concepts of physics not otherwise easily understood by students. Consisting of 600 carefully curated flawlessly produced high quality physics demonstrations in English, Spanish and Portuguese with optional subtitles and other valuable written material. Available Online • On Local Servers • On Flash Drives
An educational social network designed to help teachers create online classrooms to provide rich interaction and collaboration among teachers and students.
TAKE YOUR STUDENTS OUTSIDE THE FOUR WALLS OF THE CLASSROOM
with the 600 videos of Encyclopedia of Physics Demonstrations in English, Spanish and Portuguese, considered to be the most valuable in teaching physics and physical science to students in universities, secondary schools and also to younger students.
The Video Encyclopedia of Physics Demonstrations is a valuable resource presenting concepts of physics not otherwise easily understood by students. Consisting of 600 carefully curated flawlessly produced high quality physics demonstrations in English, Spanish and Portuguese with optional subtitles and other valuable written material.
Moodle
Moodle, the open source course management system used by thousands of educational institutions around the world providing organized e-learning as an integral asset of the series when licensed online or on microprocessors for groups of students
Products
FOR STUDENTS · PROFESSORS · CLASSROOMS AVAILABLE ONLINE · ON MICROPROCESSOR · ON FLASHDRIVE WITH SEVERAL PRICE OPTIONS