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Hace 11 horas · massive stars in our chameleon model (see Sec.IVC). B. Scalar Profiles In Fig.3, we display the radial profiles for the scalar fieldϕ(r) and its gradient σ(r) for two different parame-ter choices for the chameleon model (20), namely n= 1 and n= 2 for fixedβ= 0.05 and Λ = 10−19 M P. In Fig.4 we plot the same radial profiles but forβ= 0.01 ...
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Hace 11 horas · The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day ...
Hace 11 horas · Cameroon, officially the Republic of Cameroon, is a country in Central Africa.It shares boundaries with Nigeria to the west and north, Chad to the northeast, the Central African Republic to the east, and Equatorial Guinea, Gabon and the Republic of the Congo to the south. Its coastline lies on the Bight of Biafra, part of the Gulf of Guinea and the Atlantic Ocean.
