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2. Money booth - Wikipedia

   en.wikipedia.org/wiki/Money_booth

   A money booth, also known as cash booth, money machine, and cash cube, is an arcade game and merchandiser in the form of an enclosure in which paper money (or, alternatively, coupons, tickets, or gift certificates) are blown through the air. A participant inside the booth then has to grab as many banknotes as possible in a limited amount of ...

3. Icemaker - Wikipedia

   en.wikipedia.org/wiki/Icemaker

   An icemaker, ice generator, or ice machine may refer to either a consumer device for making ice, found inside a home freezer; a stand-alone appliance for making ice, or an industrial machine for making ice on a large scale. The term "ice machine" usually refers to the stand-alone appliance. The ice generator is the part of the ice machine that ...

4. Drag coefficient - Wikipedia

   en.wikipedia.org/wiki/Drag_coefficient

   Drag coefficients in fluids with Reynolds number approximately 10 4 Shapes are depicted with the same projected frontal area. In fluid dynamics, the drag coefficient (commonly denoted as: , or ) is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water.

5. Wind turbine - Wikipedia

   en.wikipedia.org/wiki/Wind_turbine

   Wind Power Density (WPD) is a quantitative measure of wind energy available at any location. It is the mean annual power available per square meter of swept area of a turbine, and is calculated for different heights above ground. Calculation of wind power density includes the effect of wind velocity and air density.

6. Air cycle machine - Wikipedia

   en.wikipedia.org/wiki/Air_cycle_machine

   An air cycle machine ( ACM) is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine -powered aircraft. Normally an aircraft has two or three of these ACM. Each ACM and its components are often referred as an air conditioning pack. The air cycle cooling process uses air instead of a phase changing ...

7. John Gorrie - Wikipedia

   en.wikipedia.org/wiki/John_Gorrie

   At the time the theory that bad air — mal-aria — caused diseases was a prevalent hypothesis, and based on this theory, he urged draining the swamps and the cooling of sickrooms. For this he cooled rooms with ice in a basin suspended from the ceiling. Cool air, being heavier, flowed down across the patient and through an opening near the floor.