What Materials Are Used to Make Instruments?
Many of them are made in factories. Others are made by hand. Historians say the first instruments were likely made by chance. This hap
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Machines
How Do Satellites Stay up While Orbiting the Earth?
Satellites are any objects that revolve around (orbit) another object in space. Some satellites are natural, while others are artificial (man-made). The moon is an example…
How Do Vertical Wind Tunnels Work?
The invention of large machines called vertical wind tunnels launched an entirely new sport: indoor skydiving! After donning a jumpsuit, goggles, a helmet, and…
How Do Drink-vending Machines Work?
Drink-Vending Machines are operated electronically when coins are inserted and a button pressed to select the beverage required. They have f
Who Was Rube Goldberg?
Who Was Rube Goldberg? Reuben Lucius “Rube” Goldberg was born on July 4, 1883, in San Francisco, California. As a teen, he loved to draw a