Answer:
Through the period luminosity relation to Cepheid variables
Explanation:
The luminosity of a given Cepheid can be established when the period luminosity relationship is calibrated.
Their brightness is then used to find their distance
Answer:
∠I ≅ ∠K
This is the answer i have concluded from looking at others, not 100%
<span>The gold and salt trade lost a lot of business to the slave trade.
Borders were created that split ethnic groups.
Villages lost many skilled members of the community. </span>
Answer:
The top soil particles are finest and porous so that it allows more water to retain in it. The top soil is darker in colour due to the presence of humus which makes it fertile and best for plant growth.
Increasing wavelength is an indication of a Doppler shift caused by an object moving away from the viewer. Longer wavelengths (of the visible spectrum) are redder, shorter wavelengths are bluer. Objects moving away from you have a red shift, objects moving toward you have a blue shift.
