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Astronauts in orbit are weightless. 

A quantity where both the amount and the direction matter.   

This type of velocity is based initial position, final position, and time elapsed. It doesn’t take into account anything that happens between the two. 

Friction associated with sliding motion

Classical texts survived the early medieval period in Western Europe primarily through preservation by monastic scribes and Islamic scholars.

John Calvin taught that signs of salvation might be reflected in a person’s disciplined and moral life, though salvation itself was predetermined.

Technological innovation in Western history has usually followed, rather than caused, major shifts in political or religious power.

Michelangelo’s David presents a relaxed, youthful figure, while Donatello’s version displays heroic tension and classical idealism.

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

Infections within the different layers of cervical fascia may affect other organs within the body. In particular, infections in the retropharyngeal space might spread to the thorax.  How would this, if at all, affect speech?