Removing and replacing keys on Acer Aspire laptop's keyboard may require a small screwdriver for precision. Keyboard keys of Acer laptops designed for easy removal and replacement.
How to Measure Air Pollution for a Science Fair Project. Pollution is one among the major problems of todayâs world and air pollution is one root cause of many environmental issues. You can use a magnifying glass for this purpose as the dust particles are too tiny to be seen with necked eye. 2  Count the number of dust particles carefully stuck to the Vaseline in each square and note them down on a note book. 3  Use the number of dust particles sticked to the squares as a proof of air pollution.
Air balancing involves testing and then adjusting the HVAC system so that the proper amount of air is distributed to each room. Several tests are conducted to measure air at the grilles, while manometers measure pressure and hygrometers measure temperature of the system and humidity. The test results are analyzed, and then the duct system dampers are adjusted and duct repairs made as needed to provide balanced airflow. Learn more about air balancing, as well as Griffith Energy Services, Inc.âs air conditioning solutions, or call 888-721-5707.