It is <u>true </u>that human population projections are subject to change due to fluctuations in global fertility and mortality rates.
Although people can predict to a certain point what the future population will be like, they cannot predict all of the circumstances in which the population will be changed. They have to take into account mortality rates of people, as well as fertility levels in the future, which is impossible, which means that there projections aren't set in stone - they are likely to change quite a lot.
Dementia an abnormal condition marked by multiple cognitive
deficits that include memory impairment Caused by diseases like Alzheimer's,
Parkinson's, & Huntington's. The most common early symptom is difficulty in
remembering recent events (short-term
memory loss). As the disease advances, symptoms can
include problems with language, disorientation(including easily getting
lost).
Answer:
hertz (Hz); decibels (dB)
Explanation:
The Sound Measurement units are: Hertz (Hz) and Decibels (dB).
As you may know, sound travels in waves. The speed of the vibrations of these waves defines the tone of the sound. The tone is measured in Hertz, vibrations per second. The higher the number of vibrations per second the higher the sound. Hertz therefore measures the pitch of the sound. The decibel, in turn, measures the power of the sound, its energy, the stronger or weaker it is emitted. Measures the volume of the sound.
<span>arteries
are larger, more muscular and more elastic than veins; they carry blood
that is under pressure from having been pumped out of the heart; veins
are under much less pressure, so they are not as strong</span>