Which of the following is a result of the transfer of energy? - gravity
- matter
- magnetism
- sound

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

Elements that have one valence electron and are very reactive are called

Which of the following is a transformer used for? alternate a voltage produce a voltage increase or decrease a voltage eliminate a voltage