What is the primary function of a rheostat in an electrical circuit?
Protecting from Overload | Amplifying Current | Controlling Resistance | 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"?
Oprah Winfrey | Jay Leno | Ellen DeGeneres | David Letterman
Which president is credited with supporting the Argentine Formula 1 Grand Prix circuit opened in 1952?
Raúl Alfonsín | Néstor Kirchner | Juan Perón | Carlos Menem
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?
-153oC | -269oC | -232oC | 0oC
