1) The North African, East African, South African, Central African, and West African regions are on the map. To see all the nations, go to Wikipedia and search "African Countries"
2) The green lines represent the boundaries between these regions, defined by state borders. The light grey and brown text represent the physical land forms, the blue lines represent rivers, and the black lines represent countries' borders. The black dots represent the capital cities of the countries.
The time that it takes a sound to decrease to 1/1000th of its original level is the reverberation time.
Reverberation time (RT) is that the time needed for the sound in a very area to decay over a selected dynamic vary, typically taken to be sixty decibel, once a supply is suddenly interrupted.
The reverberation time depends chiefly on a room's volume and space and on the absorption at the walls. usually absorption is frequency dependent and so the reverberation time of a space varies with frequency. Some materials that could be used to scale back reverberation are fibre board, serious curtains, plastics etc.
To learn more about Reverberation time here
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Answer:
Depth perception
Explanation:
Depth perception can be defined as the ability to be able to see or view things visually through the use of three dimension which are the length, width and depth in which this dimension enable us to be conscious of the world and to judge how far the distance of an object is or are from someone.
Therefore Depth perception is a tool which gives the human eye's the ability to see things in three dimensions and judge the distance of an object.
Which is why when an infant are been coaxed by their mothers to crawl out onto the glass covering, most infants refused to do so, indicating that they had developed DEPTH PERCEPTION.
The correct answers are the following.
1.- In a sprain, the ligaments reinforcing a joint are excessively stretched or torn: T.
2.- Age-related erosion of articular cartilages and formation of painful bony spurs are characteristics of gouty arthritis: osteoarthritis.
3.- Chronic arthritis usually results from bacterial invasion: Acute.
4.- Healing of partially torn ligament is slow because its hundreds of fibrous strands are poorly aligned: vascularized.
5.- Rheumatoid arthritis is an autoimmune disease: T.
6.- High levels of uric acid in the blood may lead to Rheumatoid arthritis: Gouty arthritis.
7.- A "soft" bone condition in children, usually caused by a lack of calcium or vitamin D in the diet is called osteomyelitis: Rickets.
8.- Atrophy and thinning of bone owing to hormonal changes or inactivity (generally in the elderly) is called osteoporosis: T.
A is the answer to the question.
