instruction:
In this task the focus is on physical knowledge about the world. Given the provided goal task in the input, describe a process that would lead to the asked outcome. This process often involves physical motions with objects, such as moving them, arranging them in a certain way, mixing them, shaking them, etc. 
question:
How often should I flip hamburger patties when making hamburgers?
answer:
Put your patties on the grill and let them sit for 4-5 minutes, then flip and let them cook for 4 minutes.


question:
How can I figure out if something is economical?
answer:
Look up its effect on your wallet, as well as the nessary materials to build it.


question:
To make a steampunk bicycle light
answer:

Use an old lantern.