The electric chair was invented by a dentist!
122
Energy is being wasted if a toaster is left plugged in after use.
21
Whale oil was used in automobile transmissions as late as 1973.
56
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
More than a billion transistors are manufactured every second.
-25
