<https://secure.gravatar.com/avatar/bf334b99a1afebb61da9499965762ec0?s=96&amp;d=blank&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://gurumuda.net/contoh-soal-kalor-jenis-dan-kapasitas-kalor.htm>