On the hertzsprung-russell diagram shown, the sun is closest to letter (in the chart)

a) a
b) b
c) c
d) d

Answer: C) c

The sun is part of the group of stars calld the Main Sequence. It has an absolute magnitude of approximately 4.83, a temperature of 5778 K a luminosity of 1 L☉ and a spectral class of G-type.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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