While very high or very low anxiety impairs performance, moderate anxiety facilitates it. These findings illustrate the bidirectional relationship of emotion and .

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

answer seismograph;