Change the chapter
Question
A section of superconducting wire carries a current of 100 A and requires 1.00 L of liquid nitrogen per hour to keep it below its critical temperature. For it to be economically advantageous to use a superconducting wire, the cost of cooling the wire must be less than the cost of energy lost to heat in the wire. Assume that the cost of liquid nitrogen is $0.30 per liter, and that electric energy costs$0.10 per kW·h. What is the resistance of a normal wire that costs as much in wasted electric energy as the cost of liquid nitrogen for the superconductor?
$0.30 \textrm{ }\Omega$
Solution Video

# OpenStax College Physics for AP® Courses Solution, Chapter 34, Problem 31 (Problems & Exercises) (2:13)
{"ft_lang_label":"__label__en","ft_lang_prob":0.9351912,"math_prob":0.92164314,"size":2352,"snap":"2022-40-2023-06","text_gpt3_token_len":515,"char_repetition_ratio":0.1511925,"word_repetition_ratio":0.036117382,"special_character_ratio":0.21768707,"punctuation_ratio":0.04025424,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.9864084,"pos_list":[0,1,2,3,4],"im_url_duplicate_count":[null,5,null,null,null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2023-02-02T18:41:54Z\",\"WARC-Record-ID\":\"<urn:uuid:cb5cb42a-4efb-4247-8cab-fcce4e750d53>\",\"Content-Length\":\"48886\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:186b0906-54d7-4ba8-bc64-edda7cdded5f>\",\"WARC-Concurrent-To\":\"<urn:uuid:d4d189fd-3e35-4ae5-b29a-2844eb4b6bf8>\",\"WARC-IP-Address\":\"34.238.11.122\",\"WARC-Target-URI\":\"https://collegephysicsanswers.com/openstax-solutions/section-superconducting-wire-carries-current-100-and-requires-100-l-liquid-0\",\"WARC-Payload-Digest\":\"sha1:G73THNGBXZPYLONRN73KKZPLAPF7TKLB\",\"WARC-Block-Digest\":\"sha1:STWTYABNIPLAWFC3RQIHTYZZZAOJG6RK\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2023/CC-MAIN-2023-06/CC-MAIN-2023-06_segments_1674764500035.14_warc_CC-MAIN-20230202165041-20230202195041-00830.warc.gz\"}"}