Misc: Who was the personification of peace?

Questions

Any type of machine that obtains mechanical energy directly from the expenditure of the chemical energy of fuel burned in a combustion chamber that is an integral part of the engine?

Any type of self-propelled vehicle used by railroads to pull or push other types of rolling stock, including passenger, freight, & work cars?

Anything that occupies space & has mass is generally known as ______?

Aphids can give birth how long after being born themselves?

Apparatus or specially constructed chamber for maintaining living organisms in an environment that encourages growth?