Gravity Light is a gravity-powered lamp designed by the company Deciwatt for use in developing or third-world nations, as a replacement for kerosene lamps . It uses a bag filled with rocks or earth, attached to a cord, which slowly descends similar to the weight drive in a cuckoo clock . This action powers the light for up to twenty minutes.
The electric power network has undergone several modifications from the time of its invention. The modern electric power network has many challenges that should be met in order to deliver qualitative power in a reliable manner. There are many factors both internal and external that affect the quality and quantity of power that is being delivered. This chapter discusses the different power quality problems, their causes and consequences. Power Quality : The quality of electric power delivered is characterized by two factors namely-“continuity” of supply and the “quality” of voltage. As indicated by IEEE standard 1100, Power Quality is characterized as- "The idea of controlling and establishing the touchy supplies in a manner that is suitable for the operation of the gear." Power quality Problems There are many reasons by which the power quality is affected. The occurrence of such problems in the power system network is almost indispensable. Therefor...
Keyboard Shorcuts (Microsoft Windows) 1. CTRL+C (Copy) 2. CTRL+X (Cut) 3. CTRL+V (Paste) 4. CTRL+Z (Undo) 5. DELETE (Delete) 6. SHIFT+DELETE (Delete the selected item permanently without placing the item in the Recycle Bin) 7. CTRL while dragging an item (Copy the selected item) 8. CTRL+SHIFT while dragging an item (Create a shortcut to the selected item) 9. F2 key (Rename the selected item) 10. CTRL+RIGHT ARROW (Move the insertion point to the beginning of the next word) 11. CTRL+LEFT ARROW (Move the insertion point to the beginning of the previous word) 12. CTRL+DOWN ARROW (Move the insertion point to the beginning of the next paragraph) 13. CTRL+UP ARROW (Move the insertion point to the beginning of the previous paragraph) 14. CTRL+SHIFT with any of the arrow keys (Highlight a block of text) SHIFT with any of the arrow keys (Select more than one item in a window or on the desktop, or select text in a document) 15. CTRL+A (Select all) 16. F3 key...
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