What is the primary function of a rheostat in an electrical circuit?
Protecting from Overload | Controlling Resistance | Amplifying Current | Generating Electricity
What word is the name for a fencing sword and a sheet of thin metal?
Which US chat-show host had an acting role in the film "The Color Purple"?
Ellen DeGeneres | Oprah Winfrey | David Letterman | Jay Leno
Which president is credited with supporting the Argentine Formula 1 Grand Prix circuit opened in 1952?
Néstor Kirchner | Carlos Menem | Juan Perón | Raúl Alfonsín
The Mariana Trench, the deepest point on earth, is located in which ocean?
In which direction does the tail of a comet point as it passes through our solar system?
Towards the sun | Away from the sun
What is the boiling point of helium at standard atmospheric pressure?
-269oC | 0oC | -153oC | -232oC
