You can separate the iron filling from the mixture by using magnet , because we know iron filling can easily attracted towards the magnets, and the mixture of sand and sawdust can be separate when we put the mixture into the water. then you can easily separate the sawdust and sand :)
Proving a theory and writing a law.
Answer:
polypeptide chain
Explanation:
each amino acid unit in a polypeptide is called a residue. A polypeptide chain has polarity because its ends are different, with an α-amino group at one end and an α-carboxyl group at the other.
Water<span> molecules forming </span>hydrogen bonds<span> with one another. the partial negative charge on the O of one molecule </span>can<span> form a </span>hydrogen bond<span> with the partial positive charge on the hydrogens of other molecules.w</span>ater<span> molecules are also attracted to other polar molecules and to ions.</span>
Atoms. they make up everything