Like terms.}}} \end{aligned} (f+g)(x)=f(x)+g(x) Define.=(x+1)+(x2−2x+5) Substitute.=x+1+x2−2x+5
Answer:
As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and glows red. The star has now reached the red giant phase. It is red because it is cooler than it was in the main sequence star stage and it is a giant because the outer shell has expanded outward. In the core of the red giant, helium fuses into carbon. All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which of the following life cycle paths it will take from there.
diagram of the life cycles of low and high-mass stars
The life cycle of a low mass star (left oval) and a high mass star (right oval).
the different evolutionary paths low-mass stars (like our Sun) and high-mass stars take after the red giant phase. For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.
Explanation:
Air masses<span> can affect the weather because different air masses differ in temperature, density, and moisture content.</span>
<span>it doesn't matches with your options but it was formed in 1814
Although Christopher Columbus sighted
Guyana during his third voyage (in 1498), the Dutch were the first to
establish colonies: Essequibo (1616), Berbice (1627), and Demerara
(1752). After the British assumed control in 1796, the Dutch formally
ceded the area in <span>1814</span></span>
Answer:
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Explanation:
An earthquake is caused by a sudden slip on a fault. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
There are many different types of earthquakes: tectonic, volcanic, and explosion. The type of earthquake depends on the region where it occurs and the geological make-up of that region. The most common are tectonic earthquakes.
The National Earthquake Information Center (NEIC) locates an average of 50 earthquakes every day, or about 20,000 a year.