A silver wire is 0.04 mm it is used to make a resistance of 1ohm if the resistivity of silver is 1.6*10^-8 then calculate the length of the wire needed

Could someone me find the answer to this problem.

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.