What is an engine configuration and some examples?

Oxygen in air causes iron to rust so iron and oxygen are what in this process? Why are the inner planets small and rocky? Simple reflex agents try to maximize their expected happiness? What process is triggered as the slab descends beneath the other plate? Are women cleverer than men? Does Salmonella have a cell membrane? Where in the world do earthquakes occur often? What is the average speed of an asteroid? Is produced when a cold air mass moves into an area where a war air mass is located? Why do most flowers have Bitter taste which terms off other animals? What threat does the water cycle pose to the envirment? Who supplies weapons to Kenya? How many meters 1.5 miles? What is the line of latitude near the north pole? Why do streamline bodies move faster in liquids? Why is individuals moved to different positions? What is the impulse conduction through a reflex arc? Where firs fertilization usually occur? Why did William Cullen invent the refrigerator? What does the metal iridium look like?