The monsoon season lasts during the northern (June September) and the southern (November to February) hemisphere summer.
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:
We are not given with the diagram or sketch the angles that are being referred to in this item but it is easy to conclude that angles knl and lnm are complementary. This means that their sum is a right angle with measure equal to 90°. The angles share a common leg that is the segment ln.
The value of x can be computed by adding up the expressions for knl and lnm and equate it to 90. That is,
(6x - 4) + (4x + 24) = 90
Simplifying the equation will give us,
10x = 70
Dividing both sides by 10 will give us the final value for x which is equal to 7.
<em>ANSWER: x = 7</em>
Answer:
D. (1) low, (2) absorbs, D. The Poles are tilted most toward or away from the Sun on the Solstices
Explanation:
- Albedo plays a major role in the energy balance of the earth's surface, as it is defined as the rate of absorption of part of solar radiation. Albedo ranges from 0.2 for dark, rough soil surfaces, some of the values around to 0.5 show light soil, and snow has an albedo of 0.75
- Thus most of the solar radiation is absorbed by the soil particles there tectonic rate of sand and snow, in contrast, is very high as compared to the normal dull soil surface.
- The poles are slightly tilted due to the axial rotation of the earth and hence, away from the sun and the solstice that occurs is mostly of lower intensity. As solstice is defined by the declination of sun rays over the surface of the earth when the sun is directly overhead the noon.