Answer:
d) Chemical composition of its outer regions
Explanation:
Spectroscopy is the study of spectral lines, it's an important part of studying the chemistry that goes on in stars and interstellar clouds, spectral lines can give relevant information because every atom or molecule gives off light at a specific frequency, thus, astronomers can look for gas containing a particular atom or molecule by tuning the telescope to one of the gas's characteristic frequencies. Therefore, we can know the chemical composition or a star's outer regions analyzing the spectral lines.
Even though the spectral shape of a blackbody continuum depends on the temperature of the object an there's a relationship between an object’s temperature and the peak of its spectrum, we don't consider this answer as correct because we are not measuring spectral lines but the continuum.
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Answer: The answer is Southern Germany
Answer:
Technology is the sustainable way to generate tha alternate new sources of energy and suffice the demand of earth's resources.
Explanation:
Coal and firewood is the only conventional sources of energy in the world since Industrial revolution. After introduced modern machineries, oil and natural gas were diggiong out using modern tools but these resources also exhaustable. So many countries and international organisations innovate the new technology and produce the renewable energy in the cost effective manner such as Solar energy, Wind energy, Biofuel and so on, they are not pollute the environment and generate sustainable earth for our future's world.
Answer:Resources such as rocks, soil, water, and air, nonliving things that help to meet our needs. This lesson focuses on students learning about Earth's Resources. They learn that water and air are renewable resources that can be replaced quickly. They learn that soil and rocks are non-renewable and they cannot be replaced quickly.
Explanation:
That was the system that became known as 'Apartheid'.
