Answer:
it's 200
Explanation:
I searched it on the internet
Answer:
Australia is a nation in transition. In the span of a generation, Australia's population has increased by more than half. Demographically we are aging, with an average age 7 years older than it was 3 decades ago, but with a life expectancy 7 years greater than it was in 1984.
The answer is A to this question primary
If a hot gas cloud is moving toward us, the frequency of the emission lines will be more elevated than those of a gas cloud that is inert or stationary.
<h3>What are emission lines?</h3>
Emission lines are indicative of a bright line in the spectrum of emission related to gas or vapor.
Thus it is correct to state that If a hot gas cloud is moving toward us, the frequency of the emission lines will be more elevated than those of a gas cloud that is inert or stationary. This is because gases expand as they get hotter.
Learn more about emission lines at;
brainly.com/question/24176807
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