If a light ray hits the back of the spoon at a 30 degree angle, the angle that the ray will reflect off the spoon is less than 30
30 degree
more than thirty degreese
unpredictable

b.

the accuracy of the data.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

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.