Energy is being wasted if a toaster is left plugged in after use.
21
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Whale oil was used in automobile transmissions as late as 1973.
56
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
A small airplane can fly backwards.
75
