Ads
related to: desk bookcase combo dorm size top speed fan
Search results
Results From The WOW.Com Content Network
Where noise is an issue, larger, slower-turning fans are quieter than smaller, faster fans that can move the same airflow. Fan noise has been found to be roughly proportional to the fifth power of fan speed; halving the speed reduces the noise by about 15 dB. [22] Axial fans may rotate at speeds of up to around 38,000 rpm for smaller sizes. [23]
Computer desks in a Fermilab control room An uncommon office computer desk with the screen under the top The top of a typical home computer desk. The computer desk and related ergonomic desk are furniture pieces designed to comfortably and aesthetically provide a working surface and house or conceal office equipment including computers, peripherals and cabling for office and home-office users.
The ingenuity of his work resided in the economy of space it provided. Thirty-two volumes of the American Cyclopedia could be stored in a compact space, and readily available for perusal at the touch of a finger. Danner's bookcase appeared in the 1894 Montgomery Ward catalog. In 1878 he exhibited his bookcases at the Paris International ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The desk given to Henry Grinnell's widow, in recognition of the large sums of money her husband spent trying to find Sir John Franklin and his ships, is now known as the Grinnell desk. [14] [79] This desk is 42.25 in (107.3 cm) high, 48 in (120 cm) wide, and 26.75 in (67.9 cm) deep.
Steam engines promoted automation through the need to control engine speed and power.. The introduction of prime movers, or self-driven machines advanced grain mills, furnaces, boilers, and the steam engine created a new requirement for automatic control systems including temperature regulators (invented in 1624; see Cornelius Drebbel), pressure regulators (1681), float regulators (1700) and ...