Which physical force is the only one that is always attractive, never repulsive?

More Questions:

Which food manufacturer produces and sells Cheez Whiz?

In the comic book series "Strangers in Paradise', which employee of Mrs. Parker was framed with stealing $850,000 from Senator Chalmers?

What two countries share Lake Geneva?

In which US state is Stone Mountain?

The city of Machu Picchu is located in which country?

Which US state shares a nickname with the Australian state of Queensland?

Snails are members of the class "Gastropoda', which literally means what?

What was the name given to the space missions that took place between the Mercury and Apollo missions?

Bronze is an alloy of what two metals?

In the TV show "The Simpsons', the words across the front of the Springfield museum say "Truth, Knowledge and..." what?

What does Charlie Brown set out to do in the made-for-TV special, A Charlie Brown Christmas?

Kathleen Turner was the voice of which character in the movie "Who Framed Roger Rabbit"?

Who is the target of the Terminator in the original 1984 movie of the same name?

In what city did Anne Frank write her diary?

Who portrayed Marshal Matt Dillon in the TV show "Gunsmoke"?