Understanding Electricity: Generation, Distribution & Applications
Overview of Electricity
Electricity is a secondary source of energy, meaning it’s derived from other primary sources. In many countries, the primary sources for electricity generation include:
- Hydro (51%)
- Gas (34%)
- Coal (9%)
- Oil or other (6%)
Electrical energy accounts for approximately 17% of total energy sources in some countries. Other significant energy sources include:
- Petroleum (38%)
- Gas (26%)
- Firewood (13%)
- Coal (6%)
Electricity is crucial for various production processes, including industry, mining,
Read MoreBoost Your Windows 7 PC Speed & Performance | PC Repair Clinic
PC Performance Advisor Report
DATE OF TEST: Monday, March 11, 2013 9:04:42 p.m.
Attention: The most common PC troubles are found at locations spread throughout your PC. Do you know where they are? Read on to find out how to pinpoint these locations where errors exist and what potential errors they might cause.
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PC Repair Clinic: Fix PC Errors and Speed Up Windows
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Read MoreBoost Your PC Performance with System Mechanic: The Science Behind It
English
Scans last 24 hrs
any problems found, plus a list of recommended fixes.
PC Hints and Tips
- Registry cleaner myths
- Computer repair
- PC tuneup
- Computer speed up
- Registry repair
- Slow computer
- Windows startup
- Windows cleanup
Acoustic Comfort in Buildings: Noise Sources & Control
Acoustic Intensity
By definition, there is a difference of 1 Bel between two currents if the relationship is 10. When compared with a reference intensity, the number of dB for each intensity level defines its intensity on a scale where the zero level (0 dB) corresponds to the intensity of reference. This is taken as corresponding to the average threshold of perception at 1000 Hz.
Sound
The magnitude of the sensation of sound depends on the acoustic wave intensity and frequency. Increased sensitivity
Read MoreEnvironmental Protection and Management Act (EPMA) Cheat Sheet
EPMA
1a. Duty of Occupier
General (EPMA Sec 2): Occupier must take reasonably practicable measures to ensure safety, considering the conditions, circumstances, technical knowledge, provision/maintenance/proper use of plant, and supervision of any process/operation.
Land and Drain (EPMA Sec 15): Occupier must obtain a license from the Director-General (DG) to discharge trade effluent, oil, chemicals, sewage, or other polluting matters into any drain or land. Failure to do so may result in liability.
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