4. AL FRENTE DE CADA MATERIAL DETERMINE SI ES UN ELEMENTO QUIMICO UN COMPUESTO QUIMICO, UNA MEZCLA HOMOGÉNEA, UNA MEZCLA HETEROGENEA

1. Oxigeno
2. Cloruro de sodio
3. jarabe
4. Nitrogeno liquido
5. Leche
6. Limonada sin azucar
7. nubes
8. Acido clorhidrico
9. Ajiaco
10. Tintura para el pelo​

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.