Magnetic Fields ch 20
... A magnetic field does not mess with a stationary charge, but an electric field does. For every magnet, there is a North and South pole which can never be “separated”. Ain’t no thing as a North by itself. ...
... A magnetic field does not mess with a stationary charge, but an electric field does. For every magnet, there is a North and South pole which can never be “separated”. Ain’t no thing as a North by itself. ...
23sun6s
... a) One year is the period of the comet b) The meteors disperse after one year c) The comet debris occupies one spot on the Earth’s orbit d) It takes one year for the comet to produce more debris e) It is only one year for short period comets, for long period comets the ...
... a) One year is the period of the comet b) The meteors disperse after one year c) The comet debris occupies one spot on the Earth’s orbit d) It takes one year for the comet to produce more debris e) It is only one year for short period comets, for long period comets the ...
Summary of lesson
... 1. Read the information on page 1.2. Then answer question 1 in the tns file and/or on the worksheet. Although you may not have enough information to fully answer the question, make a prediction based on what you have learned about electromagnets so far. You will be testing your prediction by making ...
... 1. Read the information on page 1.2. Then answer question 1 in the tns file and/or on the worksheet. Although you may not have enough information to fully answer the question, make a prediction based on what you have learned about electromagnets so far. You will be testing your prediction by making ...
magnetic field
... Opposite fields from two different magnets show us that there is an attraction. ...
... Opposite fields from two different magnets show us that there is an attraction. ...
Review of dielectric and magnetic materials
... Review of dielectric and magnetic materials Dielectric properties of materials are due to atomic-scale electric dipoles. Atoms and molecules have induced dipoles so that when an electric field is applied they have a dipole moment. Often the response is linear a low fields so ~ where α is the electri ...
... Review of dielectric and magnetic materials Dielectric properties of materials are due to atomic-scale electric dipoles. Atoms and molecules have induced dipoles so that when an electric field is applied they have a dipole moment. Often the response is linear a low fields so ~ where α is the electri ...
Electromagnetism
... Opposite fields from two different magnets show us that there is an attraction. ...
... Opposite fields from two different magnets show us that there is an attraction. ...
Lecture 14: Magnetism
... For a long time, people knew only one source of magnetism (from iron). In 1821, a Danish physicist, Oersted noticed that an electrical wire carrying current made the nearby compass reorient. First clue of inter-relation between electricity and Magnetism. Ampere, Faraday established the nature of e ...
... For a long time, people knew only one source of magnetism (from iron). In 1821, a Danish physicist, Oersted noticed that an electrical wire carrying current made the nearby compass reorient. First clue of inter-relation between electricity and Magnetism. Ampere, Faraday established the nature of e ...
The Solar Cycle
... A sunspot is an Earth-sized dark blemish found on the surface of the Sun. The dark color of the sunspot indicates that it is a region of lower temperature than its surroundings. Sunspots are caused by magnetic disturbances that occur in the Sun. They are magnetic storms on the Sun. The average numbe ...
... A sunspot is an Earth-sized dark blemish found on the surface of the Sun. The dark color of the sunspot indicates that it is a region of lower temperature than its surroundings. Sunspots are caused by magnetic disturbances that occur in the Sun. They are magnetic storms on the Sun. The average numbe ...
CH 31 solutions to assigned problems
... 27. From Eq. 31-16b, the instantaneous energy density is u 0 E 2 . From Eq. 31-17, we see that this instantaneous energy density is also given by S c . The time-averaged value is therefore S c . Multiply that times the volume to get the energy. S 1350W m2 U uV V 1.00m3 4.50 106 J ...
... 27. From Eq. 31-16b, the instantaneous energy density is u 0 E 2 . From Eq. 31-17, we see that this instantaneous energy density is also given by S c . The time-averaged value is therefore S c . Multiply that times the volume to get the energy. S 1350W m2 U uV V 1.00m3 4.50 106 J ...
Radiative energy transport
... - There is a possibility for electron to absorb a light and be ripped off an atom (ionization – recombination process). This is called bound-free transition. - Bound-free transitions do not have exact wavelength: they contribute to continuum radiation, or everything except absorption lines. ...
... - There is a possibility for electron to absorb a light and be ripped off an atom (ionization – recombination process). This is called bound-free transition. - Bound-free transitions do not have exact wavelength: they contribute to continuum radiation, or everything except absorption lines. ...
Aurora
An aurora is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.