The first alarm clock could only ring at 4 a.m.
120
Castor oil is used as a lubricant in jet planes.
-5
Any modern jet is capable of breaking the sound barrier.
34
In the early 1960's, Porsche commercially manufactured farm tractors.
24
If a car is travelling at 55 miles per hour it will travel 56 feet before the driver can shift his foot from the accelerator to the brake.
25
Sony researchers have developed a refrigerator that only opens when you smile.
9
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4