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MrMuchimi
3 years ago
12

When calculating global population growth,the death rate is

Physics
2 answers:
weeeeeb [17]3 years ago
8 0
Using just these variables, Population growth = Population*(Birth rate - Death rate). However, a couple of real-life refinements: 1. Although the number of births and deaths …depends on the population, it is related to the age-structure of the population. A very old population, for example, will not have many births but many deaths whereas a young population will have more births and fewer deaths. So, the population should be stratified according its age structure. 2. Net migration also needs to be taken into account.      
inessss [21]3 years ago
6 0
When calculating global population growth, the death rate is subtracted from the birth rate
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You place a light bulb 8 cm in front of a concave mirror. You then move a sheet of paper back and forth in front of the mirror.
Alika [10]

sorry - late reply...just stumbled across tis...hope u can still use it :)


By the mirror equation: 1/di + 1/do = 1/f

<span>
</span>

<span>where di = distance to image = +12cm (+ for real image)</span>


and do = distance to object = +8cm


Substitute and solve for f, the focal length

<span><span>
1/12 + 1/8 = 1/f
</span><span>
1/f = (8 + 12) / 12 * 8 = 20/96
</span><span>
so f = 96/20 = 4.8 cm</span>
</span>
5 0
3 years ago
What affects sounds at their source? MENTION DOPPLER EFFECT AND VIBRATIONS
wel

Answer:

Doppler effect, the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source. This phenomenon is used in astronomical measurements, in Mössbauer effect studies, and in radar and modern navigation.

Explanation:

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