if m is a constant what is bound current density
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- Solution If the density (and mass) of the wire is constant, then so is its volume, lA = constant. Thus, R = ρl= A = ρl 2 =l A = constant × l 2, and doubling l increases the resistance four times. Problem 35.A cylindrical iron rod measures 88 cm long and 0.25 cm in diameter.(a) Find its resistance. If a 1.5-V potentialdifference is applied between the ends of the rod, find (b) the current, (c) the current density, and (d) the electric field inthe rod. cylindrical iron rod measures 88 cm long and 0.25 cm in diameter. (a) Find its resistance. If a 1.5-V potentialdifference is applied between the ends of the rod, find (b) the current, (c) the current density, and (d) the electric field inthe rod.
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Native Plant Dyes Sumac (Rhus spp.) and walnut (Juglans spp.) are native plant examples of direct dyes. Because these species are high in tannic acid, they do not require additional substances to be added for the dye to attach to fibers and form a durable bond. The tissues of canaigre dock (Rumex hymenosepalus) - a southwest desert native plant used to make yellow, gray or green dye, and widely noted for its medicinal, edible, and social uses-contain toxic oxalate. 2  The needlelike crystals produce pain and edema when touched by lips, tongue or skin.
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Why is voltage constant in a parallel circuit? How about voltage in a parallel circuit? To what can I compare it to for better understanding? For a fair comparison, compare it to gravity. Voltage is a measure of potential energy (or energy per charge, or Joules per Coulomb). Gravity has potential energy in the same way -- potential energy equals mass * height * acceleration constant, or mgh.
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Gravitational constant The constant of proportionality, G, is the gravitational constant. Colloquially, the gravitational constant is also called Big G, for disambiguation with small g (g), which is the local gravitational field of Earth (equivalent to the free-fall acceleration). The two quantities are related by g = GMEr2.
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gravitational constant A number used to calculate the force of the gravitational attraction between two bodies in Newton's law of gravitation. The gravitational constant equals 6.67 × 10-11 cubic meters per kilogram per second squared. See more at Newton's law of gravitation.
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What is charge density? In coordination compounds, charge density can be defined as the ratio of the charge to the radius of the metal ion. Charge density is directly proportional to the stability of Coordination Compounds. E.g The ionic radius of metals CuX2+ and CdX2+ are 69 pm and 97 pm respectively. Stability = 269 and 297 .
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dielectric constant As the dielectric constant increases, the electric flux density increases, if all other factors remain unchanged. This enables objects of a given size, such as sets of metal plates, to hold their electric charge for long periods of time, and/or to hold large quantities of charge.
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- The x|y chart for the 5-kg mass would look as follows: Since we know that the 5-kg mass is in static equilibrium, we know that the sum of the forces in each column equals zero. We only need to write the equation for the y-column since there are no non-zero forces in the x-column. y: C + (-mg) = 0. C - 5(9.8) = 0.
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Homework 2 P49)A point charge (m = 1.0 g) at the end of an insulating string of length 50 cm (Fig. 16-46) is observed to be in equilibrium in a known uniform horizontal electric field, E = 9200 N/C, when the pendulum has swung so it is 1.0 cm high.
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Mass concentration (chemistry) In chemistry, the mass concentration ρi (or γi) is defined as the mass of a constituent mi divided by the volume of the mixture V: For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture. This explains the usage of ρ (the lower case Greek letter rho), the symbol most often used for density.
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What is linear charge density? How do you calculate it? Answer Wiki. Linear density is the measure of a quantity of any characteristic value per unit of length. Linear mass density (titer in textile engineering, the amount of mass per unit length) and linear charge density (the amount of electric charge per unit length) are two common examples used in science and engineering.
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Bantamweight Bantamweight is a weight class in combat sports. 1  For boxing the range is above 115 pounds (52.2 kg) and up to 118 pounds (53.5 kg). 2  In kickboxing, a bantamweight fighter generally weighs between 53 kg (116 lb) and 55 kg (120 lb). 3  In MMA, bantamweight is 126–135 pounds (57.2–61.2 kg).
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Linear density Linear density. Linear density is the measure of a quantity of any characteristic value per unit of length. Linear mass density (titer in textile engineering, the amount of mass per unit length) and linear charge density (the amount of electric charge per unit length) are two common examples used in science and engineering.
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Maxwell's Equations If there is no current through the surface, then the charge in the volume remains unchanged. It follows from Maxwell’s equations that an electromagnetic field has energy and momentum. The energy density w (the energy per unit volume of the field) is equal to. Electromagnetic energy can travel in space.
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ASTR 207 - Ch. 26: Cosmology The DENSITY and MASS of the universe will determine this. If the universe is OVER critical density (9x10 to the power of -27kg/m3) then it will continue to expand until everything simply disappears and the Milky Way becomes cold and dark.
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physics Two very large parallel sheets are 5.00 cm apart. Sheet A carries a uniform surface charge density of -9.00 microcoulombs per meter squared, and sheet B, which is to the right of A, carries a uniform charge of -11.6 microcoulombs per meter squared. Assume the sheets are large enough to be treated as infinite. A) Find the magnitude of the net electric field these sheets produce at a point 4.00 cm to the right of sheet A. B) Find the magnitude of the net electric field these sheets produce at a point 4.00 cm to the left of sheet A.
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Density of Water The conversion between the two is 1000 kg/m3 to 1 g/cm3. Water never has an absolute density because its density varies with temperature. Water has its maximum density of 1g/cm3 at 4 degrees Celsius. When the temperature changes from either greater or less than 4 degrees, the density will become less then 1 g/cm3. Water has the maximum density of 1 g/cm3 only when it is pure water.
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- A commonly encountered constant defined as. where h is Planck's constant. h-bar commonly occurs in applications involving angular momentum.It is implemented in Mathematica as PlanckConstantReduced in the Mathematica add-on package. Planck's Constant.here h is Planck's constant. h-bar commonly occurs in applications involving angular momentum. It is implemented in Mathematica as PlanckConstantReduced in the Mathematica add-on package. Planck's Constant.
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Hysteresis If the intensity of the magnetizing field is gradually increased, the magnetic flux density B rises to a maximum, or saturation, value at which all of the atomic magnets are aligned in the same direction.
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Question: A block with mass m = 5 kg is attached to two springs with spring constants kleft = 30 N/m and kr... A block with mass m = 5 kg is attached to two springs with spring constants kleft = 30 N/m and kright = 55 N/m. The block is pulled a distance x = 0.22 m to the left of its equilibrium position and released from rest. 1)What is the magnitude of the net force on the block (the moment it is released)=18.7.
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definitions - Sunlightreport a problem The solar constant, a measure of flux density, is the amount of incoming solar electromagnetic radiation per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) (roughly the mean distance from the Sun to Earth).
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- The constant of proportionality K is called the hydraulic conductivity . The Darcy Velocity VD: VD = – K (∆h/∆L) and since Q = VD A ( where A = total area) Q = – KA (dh/dL) * Darcy’s Experiment 2. Head difference doesn’t change with inclination of the sand filter 3.
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Faraday constant The Faraday constant represents the amount of electric charge carried by one mole, or Avogadro's number, of electrons. It is an important constant in chemistry, physics, and electronics and is commonly symbolized by the italic uppercase letter F.oth the faraday and the farad are named for Michael Faraday, one of the independent inventors of the electric motor in the early 1800s. See also: Table of Physical Constants. See a video about calculation with Faraday's constant:
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dielectric constant The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is an expression of the extent to which a material concentrates electric flux, and is the electrical equivalent of relative magnetic permeability.
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- When electric current in a material is proportional to the voltage across it, the material is said to be ohmic, or to obey Ohm's law. A microscopic view suggests that this proportionality comes from the fact that an applied electric field superimposes a small drift velocity on the free electrons in a metal.he current density (electric current per unit area, J=I/A) can be expressed in terms of the free electron density as. The number of atoms per unit volume (and the number free electrons for atoms like copper that have one free electron per atom) is.
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What is the relationship between air density and air pressure? where P = pressure, rho = mass density, R = universal gas constant, MW = average molecular weight, and T = absolute temperature. so that at a constant temperature the density is proportional to the pressure. It also varies inversely with temperature if that changes. Even at very high pressures, where air deviates from ideal gas behavior, it is still true that at constant temperature its density is roughly proportional to its pressure.