Journey_to_the_surface_of_the_earth_pt2
... asthenosphere is part of the upper mantle – It is consider a “plastic” zone – not complete molten, but not really rigid – Rocks in the asthenosphere are very close to their melting points and so deform easily – Convection in this region is thought to be the driving force of plate tectonics ...
... asthenosphere is part of the upper mantle – It is consider a “plastic” zone – not complete molten, but not really rigid – Rocks in the asthenosphere are very close to their melting points and so deform easily – Convection in this region is thought to be the driving force of plate tectonics ...
EXERCISES 1. Separation is easy with a magnet (try it and be
... velocity. (Interestingly enough, in an accelerator called a betatron, the electric field is produced by a changing magnetic field.) 35. Speed or KE doesn’t increase because the force is perpendicular, doing no work on the particle. 36. Associated with every moving charged particle is a magnetic fiel ...
... velocity. (Interestingly enough, in an accelerator called a betatron, the electric field is produced by a changing magnetic field.) 35. Speed or KE doesn’t increase because the force is perpendicular, doing no work on the particle. 36. Associated with every moving charged particle is a magnetic fiel ...
21.2 Electromagnetism
... work ___________ that can do __________. • Common example: ______________ ...
... work ___________ that can do __________. • Common example: ______________ ...
6 September 2016 Physics 2073
... A mass of 0.1 kg vibrates with an amplitude of 0.2 m with a period of 0.75 sec. Calculate the maximum k.E(0.14J). A spring is stretched by 8 cm by a force of 10N. Find the force constant. What will be the period of vibration of a 4 kg mass suspended by it ? (125 N/m; 1.12 sec) A spring of force cons ...
... A mass of 0.1 kg vibrates with an amplitude of 0.2 m with a period of 0.75 sec. Calculate the maximum k.E(0.14J). A spring is stretched by 8 cm by a force of 10N. Find the force constant. What will be the period of vibration of a 4 kg mass suspended by it ? (125 N/m; 1.12 sec) A spring of force cons ...
L29
... magnetic field lines are always closed loops – no isolated magnetic poles • permanent magnets: the currents are atomic currents – due to electrons spinning in atomsthese currents are always there • electromagnets: the currents flow through wires and require a power source, e.g. a battery ...
... magnetic field lines are always closed loops – no isolated magnetic poles • permanent magnets: the currents are atomic currents – due to electrons spinning in atomsthese currents are always there • electromagnets: the currents flow through wires and require a power source, e.g. a battery ...
on Fast Moving Electrons
... THE ELECTRONS EMITTED ARE CALLED THERMIONS. EDISON WAS THE FIRST PERSON TO FIND THAT HOT FILAMENT EMITS ELECTRONS. HOWEVER Sir J.J.THOMSON IN 1897 DISCOVERED THE ELECTRON WHICH LED TO MORE UNDERSTANDING OF EDISON’S EXPT IN 1883. ...
... THE ELECTRONS EMITTED ARE CALLED THERMIONS. EDISON WAS THE FIRST PERSON TO FIND THAT HOT FILAMENT EMITS ELECTRONS. HOWEVER Sir J.J.THOMSON IN 1897 DISCOVERED THE ELECTRON WHICH LED TO MORE UNDERSTANDING OF EDISON’S EXPT IN 1883. ...
Faraday`s law S2017
... of the induced emf is proportional to the rate at which the magnetic flux changed. Faraday’s law can be written as, ...
... of the induced emf is proportional to the rate at which the magnetic flux changed. Faraday’s law can be written as, ...
24.1-4, 24.11
... Circular motion: Is there radiation emitted? Classical physics says “YES” orbiting particle must lose energy! speed decreases particle comes closer to center Classical model of atom: Electrons should fall on nucleus! To explain the facts - introduction of quantum mechanics: Electrons can move ...
... Circular motion: Is there radiation emitted? Classical physics says “YES” orbiting particle must lose energy! speed decreases particle comes closer to center Classical model of atom: Electrons should fall on nucleus! To explain the facts - introduction of quantum mechanics: Electrons can move ...
Electromagnets - Cornell Center for Materials Research
... group. Students should be encouraged to ask questions about their classmates’ experiments. Challenge (45 minutes) Using all of the results from the different groups, students will try to build an electromagnet that can pick up the most paperclips. Before each group goes, they will explain what varia ...
... group. Students should be encouraged to ask questions about their classmates’ experiments. Challenge (45 minutes) Using all of the results from the different groups, students will try to build an electromagnet that can pick up the most paperclips. Before each group goes, they will explain what varia ...
plasma
... to conduct electricity in neon signs and fluorescent bulbs. Gift shops sell cool novelties called Plasma spheres and scientists have made special chambers to experiment with plasma in laboratories. Naturally occurring plasma is relatively rare on Earth, occurring only in lightning discharges and in ...
... to conduct electricity in neon signs and fluorescent bulbs. Gift shops sell cool novelties called Plasma spheres and scientists have made special chambers to experiment with plasma in laboratories. Naturally occurring plasma is relatively rare on Earth, occurring only in lightning discharges and in ...
Modelling ripple transport in two dimensions
... • Particle trapping along the x direction can happen because of the presence of the ripple. • Cases of trapped and passing particles in Fig.3: phase plots in the (x,vII) space of deuterium particles released at the same position (red line), ripple amplitude about 40%, with the same initial v⊥ (same ...
... • Particle trapping along the x direction can happen because of the presence of the ripple. • Cases of trapped and passing particles in Fig.3: phase plots in the (x,vII) space of deuterium particles released at the same position (red line), ripple amplitude about 40%, with the same initial v⊥ (same ...
Seafloor Spreading and Plate Tectonics
... • Nothing in deep earth (>30 km deep) can be permanently magnetized because of T gradient • Outer core is likely the cause of Earth’s magnetic field because it is in convective motion • Moving conductor in magnetic field induces electric current (and vice-versa) • Earth’s outer core is like a “dynam ...
... • Nothing in deep earth (>30 km deep) can be permanently magnetized because of T gradient • Outer core is likely the cause of Earth’s magnetic field because it is in convective motion • Moving conductor in magnetic field induces electric current (and vice-versa) • Earth’s outer core is like a “dynam ...
Chapter 7:2 pages 198-201
... tiny grains of magnetic minerals…These mineral grains contain iron and are like compasses, aligning with the magnetic field of the Earth. 2. When the molten rock cools, the recording of these tiny compasses remains in the rock…carried slowly away from the spreading center of the ridge as seafloor sp ...
... tiny grains of magnetic minerals…These mineral grains contain iron and are like compasses, aligning with the magnetic field of the Earth. 2. When the molten rock cools, the recording of these tiny compasses remains in the rock…carried slowly away from the spreading center of the ridge as seafloor sp ...
SGES 1302 Lecture6 - Department Of Geology
... of basaltic lavas was produced at the ocean ridges, cooled, crystallized and moved away from the ridges as newer oceanic crust replaced it at the ridges. ...
... of basaltic lavas was produced at the ocean ridges, cooled, crystallized and moved away from the ridges as newer oceanic crust replaced it at the ridges. ...
2/28/2006 Chapter 30 Faraday`s Law
... Chapter 30 Faraday’s Law Michael Faraday was a self-taught physicist who developed his ideas in the early 1800’s. His work with electricity and magnetism led him to realize that while a current creates a magnetic field, a magnetic field can be used to create a current. Faraday’s Law describes anothe ...
... Chapter 30 Faraday’s Law Michael Faraday was a self-taught physicist who developed his ideas in the early 1800’s. His work with electricity and magnetism led him to realize that while a current creates a magnetic field, a magnetic field can be used to create a current. Faraday’s Law describes anothe ...
Wednesday, July 8, 2009
... vertically as shown in the figure. A magnetic field B is directed horizontally perpendicular to the wire, and points out of the page. The magnetic field B is very nearly uniform along the horizontal portion of wire ab (length l=10.0cm) which is near the center of a large magnet producing the field. ...
... vertically as shown in the figure. A magnetic field B is directed horizontally perpendicular to the wire, and points out of the page. The magnetic field B is very nearly uniform along the horizontal portion of wire ab (length l=10.0cm) which is near the center of a large magnet producing the field. ...
magnetic field
... A geomagnetic reversal is a change in the Earth’s magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth’s field has alternated polarity, with the time spans of reversal randomly distributed; most being between 0.1 and 1 million years with an average ...
... A geomagnetic reversal is a change in the Earth’s magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth’s field has alternated polarity, with the time spans of reversal randomly distributed; most being between 0.1 and 1 million years with an average ...
Introduction to Geomagnetism - Center for Science Education
... the ridge, geologists discovered that the polarity changes over the course of thousands of years. This was an exciting discovery that not only verified the theory of Continental Drift, but demonstrated that Earth's magnetism isn't constant over millions of years. The magnetic field of Earth actually ...
... the ridge, geologists discovered that the polarity changes over the course of thousands of years. This was an exciting discovery that not only verified the theory of Continental Drift, but demonstrated that Earth's magnetism isn't constant over millions of years. The magnetic field of Earth actually ...
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.