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The drinking bird is a heat engine that exploits a temperature difference to convert heat energy to a pressure difference within the device, and performs mechanical work. Like all heat engines, the drinking bird works through a thermodynamic cycle. The initial state of the system is a bird with a wet head oriented vertically.
After the bird’s beak is dipped into a cup of water, it springs back into its natural upstanding position, and the water begins to evaporate and cool the head.
A food truck is a large motorized vehicle (such as a van or multi-stop truck) or trailer equipped to store, transport, cook, prepare, serve and/or sell food. [1] [2]Some food trucks, such as ice cream trucks, sell frozen or prepackaged food, but many have on-board kitchens and prepare food from scratch, or they reheat food that was previously prepared in a brick and mortar commercial kitchen.
Many trucks and buses are highly customized and decorated by their owners. External truck decoration can cost thousands of dollars. [12] The decoration often contains elements that remind the truck drivers of home, since they may be away from home for months at a time. [13] The art is a mode of expression for the truck drivers. [14]
Before 2014, turning a vehicle into a food service truck was banned in South Korea over safety and sanitation concerns. [1] The ban was lifted in August 2014 by the President of South Korea at the time, Park Geun-Hye, as part of her deregulation efforts to help revitalise South Korea's economy and create new forms of employment in the country.
Seed dispersal by the slipstream of a passing car.. A slipstream is a region behind a moving object in which a wake of fluid (typically air or water) is moving at velocities comparable to that of the moving object, relative to the ambient fluid through which the object is moving. [1]
The birds in a truck riddle is a riddle that asks whether a container or a truck carrying birds changes in weight when the birds inside are flying. [1] The television series MythBusters investigated the question in a 2007 episode, testing it both with a box of pigeons and again with a model helicopter. They concluded that the contents being in ...
On February 10, 1915, the strip was named Dok's Dippy Duck with no change in what was happening in the plot; the February 10 strip addressed what had happened in the previous day's strip. [7] One change that did happen was to make the comic vertical and larger, with fewer frames; it had only four frames, [ 7 ] where earlier strips had as many ...