You need to insert a screw into a piece of wood. to do so, you apply or a force over a distance to create circular motion in the screw.

The answer is "Torque"

Explanation:

Torque is a turning effect of a force applied at distance. This is the force that helps in the tightening and loosening of elements such as bolts and screws. So, if you need to insert a screw in a piece of wood to drive it in, the force you need to apply using a screwdriver is called Torque. Therefore, the answer is "Torque"

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.