Will mark as brainliest. what type of substance would be best for use in a heating system? a liquid with a low specific heat a gas with a low specific heat a liquid with a high specific heat a solid with a high specific heat

A liquid with low specific heat. This is because it cost less one, two, it's better than gas because they give more energy, and finally because it is a good heating temperature. In other words, it's the first option.

Hope this helps! Thanks for posting the question, glad to help! :-)

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.   

The correct answer should be a.