Used to find the direction of torque

When a book rests on a table the two forces present are weight downward and the normal force upward.  Where does the normal force come from?

Round 1 of the world’s most boring game show called “Work or Not Work?”    A mouse pushes a block of cheese horizontally across a table’s surface. Work or Not Work?!?!?

Astronauts in orbit are weightless. 

Energy can neither be created nor destroyed only converted into different forms. 

The cultural development of the West saw little interaction with North Africa and Asia until the Age of Exploration.

The invention of the printing press accelerated existing critiques of religious authority, rather than initiating them.

The revival of long-distance trade in the High Middle Ages contributed to the growth of towns and the decline of serfdom.

The medieval Church uniformly suppressed all forms of intellectual inquiry during the Middle Ages.

Which artery and vein supply the anterior tip of the tongue?