Earth's Magnetic Field Research Paper Example | Topics and Well Written Essays - 1000 words

Earth's Magnetic Field - Research Paper Example The research paper "Earth's Magnetic Field" talks about the magnetic field which is the area which is under the influence of magnetic force and is a vector quantity, i.e. it is denoted in terms of a direction and magnitude, and is measured in Teslas in SI units which are equivalent to (Newton x second)/(coulomb x meter). The magnetic field allows human beings to produce many important devices. The relationship between magnetic field and electric current has enabled humans to produce electric currents in all electric devices such as blenders and power turbines. The magnetic field of Earth is similar to that produced by a bar magnet. The circulating electric currents surrounding the Earth’s surface and in the metallic core of Earth are the source of Earth’s magnetic force. The dynamo effect of these circulating electric charges helps in creating a magnetic field. The rotation is known to be the cause of the production of electric charges and dynamo effect. The area under the influence of Earth’s magnetic force is known as Magnetosphere. A scientist Mariner 2 discovered that the magnetic field of Venus is not as strong as that of Earth. Though the iron content of these two planets is almost same, yet the strength of magnetic field is different. The reason for the difference is the s peed of movement of these two planets. Earth takes 235 days to complete a rotation whereas Venus takes 243 days. The rotation period of Venus is too slow to result in dynamo effect. The evidence of this was found on rocks.

Popular Music and the Moving Image Essay Example | Topics and Well Written Essays - 1000 words

Popular Music and the Moving Image - Essay Example Historically silent films are characterized by certain elements that defined them. These are Projection Speed, title cards, physical acting techniques and music and sound. In the absence of the spoken dialogue, title cards that comprised of printed or drawn frames of text inserted between the film frequencies to serve different roles. The particular types of title cards used in the silent films included dialogue and expository interties. The former were primarily used in conveying dialogue while the latter was used in providing supplemental narrative material whenever what was photographed could not express the full situation by itself. Essentially, the title cards were utilized by the filmmakers in the silent era to add more detail to the films in case the films developed into novelties that entertained a lot. Fundamentally, filmmakers were able to expand their potential to enhance on their storytelling by including some aspects of dialogue and in a way, the title cards served as na rration techniques (Marks, 1997).Another historical element of the silent films was live music and sound. Contrary to today’s films containing spoken dialogue and synched music in the background. The silent films were accompanied by a phonograph recording or live music such as a guitarist or pianist that was critical in reinforcing the mood of a movie and also provided the audience with emotional cues. The above narration explains why there were piano accompaniments in small towns plus the singers.