Physics - Assignment Point

Physics

Lunatics: Sun, Earth, and Moon

The aim of this lecture is to present on Lunatics: Sun, Earth, and Moon. In a lunar eclipse, the Earth moves between the sun and the moon and casts a shadow on the moon. Lunar Libration: The spin of the Moon proceeds at a uniform rate while the orbit is at a slightly nonuniform rate. The spin .....

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Presentation on Sun Seasons

Prime purpose of this lecture is to present on Sun Seasons. Here briefly describe on Properties of the Sun; Influence on Earth: Gravity; Light and Solar wind and Life cycle of the Sun. Many people believe that Earth is closer to the sun in the summer and that is why it is hotter. And, likewise.....

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Cosmic Rays and Solar Flares

Cosmic rays are fast-moving ionizing particles from the Sun. The Earth’s magnetic field prevents them from reaching us because they would be very harmful. Solar flares (bursts of energy from the Sun) interfere with these satellite systems. Cosmic rays are not really rays at all, they are a stre.....

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Lecture on the Atomic Nucleus

Basic purpose of this lecture is to present on Atomic Nucleus. Two ways to rearrange nuclei and get energy. Fission: produces energy by breaking up massive nuclei like Uranium into less massive nuclei like Barium and Krypton; A-bombs; nuclear reactors needs Uranium 235, Plutonium 238. Problem.....

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How to Converting Mass to Energy?

General purpose of this lecture is to present on How to Converting Mass to Energy. Out of the special theory of relativity comes the most famous equation in science: E=mc². This equation tells us that mass (m) is just another form of energy (E). The c² is the square of the speed of light. 1 .....

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Acceleration Calculation

Acceleration means speeding up. Acceleration is the rate at which velocity changes. This can be an Increase in speed; Decrease in speed or Change in direction. Example: How can a car be accelerating if its speed is a constant 65 km/h? If it is changing directions it is accelerating. To calcula.....

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The Sun: A Nuclear Powerhouse

The Sun gives off energy. The energy must come from somewhere – there’s no free lunch. Conservation of energy is a fundamental tenet of physics. Now question where does the energy come from? Until the 20th century only two possibilities were known: Chemical reactions and Gravity. To und.....

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Solar Flare and Resulting Prominence

A solar flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. Radiation is emitted across virtually the entire electromagnetic spectrum, from radio waves at the long wavelength end, through optical emission to x-rays and gamma rays at the short waveleng.....

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Radiation and Earth’s Atmosphere

The earth’s global average surface temperature in present climate is 15C (59F). Without the atmosphere, it would be -18C (-0.4F). About 33C or 59.4F colder; Atmosphere is the most important component of the earth’s climate. The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and othe.....

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How is the Sun Active?

Principle objective of this lecture is to present on how is the Sun Active. The Sun is an average-size yellow star, just like billions of others in the universe. It is the center of the solar system. Earth orbits around it. Sun formed about 4.6 billion years ago. The sun has a mass of 2×103.....

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Presentation on Sunspots

Sunspots typically about 10000 km across. At any time, the sun may have hundreds or none. They are dark color because they are cooler than photospheric gas (4500K in darkest parts). They look dark only in comparison with the brighter and hotter regions of the photosphere around them. Each spot c.....

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Energy Transport within the Sun

The Sun is our sole source of light and heat in the solar system. This is a very common star, a glowing ball of gas held together by its own gravity and powered by nuclear fusion at its center. This lecture briefly focus about Energy Transport within the Sun. The sun has extremely hot core R.....

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