Iron oxide reacts with aluminum to give aluminum oxide and iron. what kind of chemical reaction is this?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley