Astronomers can measure it by way of luminosity which is the power of a star or the amount of energy (light) the star admits from its surface. they also measure the brightness of a start as if it were to appear 32.6 light years from Earth
The first question would be B) they are examples of cell organelles. The second question would be A) mitochondria. Hope this helps!
J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. ... Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.
An atomic mass unit is defined as precisely 1/12 the mass of an atom of carbon-12.
Answer:
animal
Explanation:
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