Forces
... Combining forces • Often, more than a single force acts on an object at one time. • A combination of forces on an object is called the net force. • When forces that act in the same direction, the net force can be found by adding the strengths of the individual forces. • When forces act in opposite ...
... Combining forces • Often, more than a single force acts on an object at one time. • A combination of forces on an object is called the net force. • When forces that act in the same direction, the net force can be found by adding the strengths of the individual forces. • When forces act in opposite ...
Unit 2
... ◦ North + South= Magnets Attract ◦ North + North= Magnets Repel ◦ South + South= Magnets Repel ...
... ◦ North + South= Magnets Attract ◦ North + North= Magnets Repel ◦ South + South= Magnets Repel ...
9.4.2 Photoelectric Effect
... 9.4.2 Photoelectric Effect The reconceptualisation of the model of light led to an understanding of the photoelectric effect and black body radiation ...
... 9.4.2 Photoelectric Effect The reconceptualisation of the model of light led to an understanding of the photoelectric effect and black body radiation ...
Home Work 12
... atoms whose dipole moment is antiparallel to is proportional to e-μB/kT. (a) Show that the magnitude of the magnetization of this solid is M = Nμtanh(μB/kT). Here tanh is the hyperbolic tangent function: tanh(x) = (ex – e-x)/( ex + e-x). (b) Show that the result given in (a) reduces to M = Nμ2B/kT f ...
... atoms whose dipole moment is antiparallel to is proportional to e-μB/kT. (a) Show that the magnitude of the magnetization of this solid is M = Nμtanh(μB/kT). Here tanh is the hyperbolic tangent function: tanh(x) = (ex – e-x)/( ex + e-x). (b) Show that the result given in (a) reduces to M = Nμ2B/kT f ...
Physics 2049 Exam 4 Solutions 1. A Gaussian surface
... we have total internal reflection, θ2 = 90◦ , and therefore sin θc = n2 /n1 = 0.75, so that θc = 48.8◦ . The radius R of the circle is given by R = h tan θc = 91 cm, so that the diameter of the circle is d = 182 cm. 10. A beam of unpolarized light is sent through a system of two polarizing sheets. T ...
... we have total internal reflection, θ2 = 90◦ , and therefore sin θc = n2 /n1 = 0.75, so that θc = 48.8◦ . The radius R of the circle is given by R = h tan θc = 91 cm, so that the diameter of the circle is d = 182 cm. 10. A beam of unpolarized light is sent through a system of two polarizing sheets. T ...
Magnetic Forces and Fields
... • We have so far focussed on how charges give rise to electric fields, which exert forces on other charges • Moving charge constitutes a current, and creates new phenomena not described by electric forces : magnetism • We will now begin to explore deep connections between these different phenomena ...
... • We have so far focussed on how charges give rise to electric fields, which exert forces on other charges • Moving charge constitutes a current, and creates new phenomena not described by electric forces : magnetism • We will now begin to explore deep connections between these different phenomena ...
physics terminolgy, definitions and laws
... The speed of an aeroplane is supersonic if its Mach number is greater than 1, i.e. it is moving faster than the speed of sound. ...
... The speed of an aeroplane is supersonic if its Mach number is greater than 1, i.e. it is moving faster than the speed of sound. ...
Disputes exist in Electromagnetic Induction
... Secondly, overall and unilateral? Our experiments prove that, in the experiments shown in graph 1 and graph 2, the current directions in the coil are the same. This indicate that: ①Lorentz magnetic force can explain the experiment in graph 1 as well as graph 2. ② Maxwell’s theory can only explain th ...
... Secondly, overall and unilateral? Our experiments prove that, in the experiments shown in graph 1 and graph 2, the current directions in the coil are the same. This indicate that: ①Lorentz magnetic force can explain the experiment in graph 1 as well as graph 2. ② Maxwell’s theory can only explain th ...
Electromagnetism
Electromagnetism is a branch of physics which involves the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually shows electromagnetic fields, such as electric fields, magnetic fields, and light. The electromagnetic force is one of the four fundamental interactions in nature. The other three fundamental interactions are the strong interaction, the weak interaction, and gravitation.The word electromagnetism is a compound form of two Greek terms, ἤλεκτρον, ēlektron, ""amber"", and μαγνῆτις λίθος magnētis lithos, which means ""magnesian stone"", a type of iron ore. The science of electromagnetic phenomena is defined in terms of the electromagnetic force, sometimes called the Lorentz force, which includes both electricity and magnetism as elements of one phenomenon.The electromagnetic force plays a major role in determining the internal properties of most objects encountered in daily life. Ordinary matter takes its form as a result of intermolecular forces between individual molecules in matter. Electrons are bound by electromagnetic wave mechanics into orbitals around atomic nuclei to form atoms, which are the building blocks of molecules. This governs the processes involved in chemistry, which arise from interactions between the electrons of neighboring atoms, which are in turn determined by the interaction between electromagnetic force and the momentum of the electrons.There are numerous mathematical descriptions of the electromagnetic field. In classical electrodynamics, electric fields are described as electric potential and electric current in Ohm's law, magnetic fields are associated with electromagnetic induction and magnetism, and Maxwell's equations describe how electric and magnetic fields are generated and altered by each other and by charges and currents.The theoretical implications of electromagnetism, in particular the establishment of the speed of light based on properties of the ""medium"" of propagation (permeability and permittivity), led to the development of special relativity by Albert Einstein in 1905.Although electromagnetism is considered one of the four fundamental forces, at high energy the weak force and electromagnetism are unified. In the history of the universe, during the quark epoch, the electroweak force split into the electromagnetic and weak forces.