A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Energy is being wasted if a toaster is left plugged in after use.
21
Jumbo jets use 4,000 gallons of fuel to take off.
19
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
A toaster uses almost half as much energy as a full-sized oven.
33
More than a billion transistors are manufactured every second.
-25
A small airplane can fly backwards.
75
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41