What subatomic particle has a positive charge? ?

All of the following are part of the biosphere except

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.