Which two electromagnetic waves are useful for diagnosing illnesses

What is the best way to get rid of a headache?

What types of mixtures are these? peanuts and almonds mixed together in a bowl food coloring dissolved in water a cup of tea and sugar a bucket full of sand and gravel

Why does burning coal produce more heat energy than burning paper

All of the following are signs that a chemical reaction may have taken place in a piece of glass except. a. the shape of the glass changes. b. energy is used or given off. c. new substance besides glass are formed. d. the glass changes color.

What does a liquid with more H + ions than water produce? a: pH above 7 b: base c: alkaline d: acid

02:Matter and Change What is one difference between a mixture and a compound? A. A compound can only be separated into its components by chemical means. B. A compound consists of more than one phase. C.

Charlotte is planning an investigation to learn how temperature affects the amount of salt that can be dissolved in a liquid. In Charlotte's experiment, which of the following things should she control, or keep the same? A. the type of liquid used B.

Which property ofsulphuric acid makes it suitable to use as a catalyst for the preparation of esters?

Which is an example of a covalent bond? Chlorine accepts an electron from calcium to form a stable bond. Ions in a bar of pure iron are surrounded by a large number of valence electrons.

Which frequency has more energy? (high frequency or low frequency)