1. How does the Day and night hours differ between north sphere, south sphere, e
ID: 285423 • Letter: 1
Question
1. How does the Day and night hours differ between north sphere, south sphere, equator and cancer ?2. What is observed when the camera is left on all night facing the sky ? Polaris, major zenith, or galaxy Milky Way ?
3. Which part of the Eye responds to dim light ? (retina, lenses, or cone rod)?
4. How to calculate the Slope of the well with the following measurements 120x40x320
5. When does the fetus body organs start forming during the first or second semester ?
6. How are planets formed from a spinning dust cloud ?
7. A Simple magnifying lense is which form of light ? 1. How does the Day and night hours differ between north sphere, south sphere, equator and cancer ?
2. What is observed when the camera is left on all night facing the sky ? Polaris, major zenith, or galaxy Milky Way ?
3. Which part of the Eye responds to dim light ? (retina, lenses, or cone rod)?
4. How to calculate the Slope of the well with the following measurements 120x40x320
5. When does the fetus body organs start forming during the first or second semester ?
6. How are planets formed from a spinning dust cloud ?
7. A Simple magnifying lense is which form of light ? 1. How does the Day and night hours differ between north sphere, south sphere, equator and cancer ?
2. What is observed when the camera is left on all night facing the sky ? Polaris, major zenith, or galaxy Milky Way ?
3. Which part of the Eye responds to dim light ? (retina, lenses, or cone rod)?
4. How to calculate the Slope of the well with the following measurements 120x40x320
5. When does the fetus body organs start forming during the first or second semester ?
6. How are planets formed from a spinning dust cloud ?
7. A Simple magnifying lense is which form of light ?
Explanation / Answer
1. The length of day and night changes according to the positions of latitude and the seasons. At the equator the duration of days and night are almost same. But as we move away from the equator toward the poles one of the becomes longer. For example in the northern hemisphere during the summer as we go towards the poles the length of day time increases and at the same time when we move in the southern hemisphere towards the south pole the length of night time increases and at the south pole it would be completely dark without day light for about 6 months. During the month of June when it is summer in the northern hemisphere the sun rays directly fall on the tropic of cancer which leads to longer duration of days and shorter nights in the northern hemisphere.
3. There are two types of receptor cells namely rods and cones that make up the retina. The cones are responsible for acute vision and are also responsive to colours whereas rods respond in white and black light only. Rods work in dim and dark light this is why we see much less detail and colour. Rods are more sensitive so it takes less light to respond. They are located in all parts of the eye beside the Fovea.
5. Pregnancy occurs when the sperm fertilizes the egg. After the conception the baby begins a period of dramatic change known as embroyonic stage or first trimester. During this embroyonic stage all the major parts organs and body parts of the baby eg nervous system, heart, face, arms and legs, muscles and sexual organs begins to develop. Placenta also develops during this embroyonic stage. The placeta takes blood, oxygen and water from the mother's blood and passes this to the baby with the help of the umbilical cord and also removes the baby's waste.
6. The solar system began to form about 4.56 Ga Bp. as a huge cloud of gas and dust called the solar nebula. The nebular cloud began to collapse gradually under the influence of gravitational attraction. Since it was rotating it flattened to a disk like shape. About 99.9% of the mass collapsed to form the sun and other 0.1% remained in the disk and eventually formed the planets. The process of planetary accretion took place within a strong temperature and pressure gradient generated by the early sun. As a result the more volatile constituents of the nebula evaporated in the inner most portion of the hotter solar system and condensed directly to solids further outward and formed the outer planets of the solar systems whereas the more refractory oxides of the nebula remain within the innermost portion and formed inner planet of the solar system.
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