CALC Helmholtz Coils . Figure P28.67 is a sectional view of two circular coils with radius a. each wound with N turns of wire carrying a current I , circulating in the same direction in both coils. The coils are separated by a distance a equal to their radii. In this configuration the coils are called Helmholtz coils; they produce a very uniform magnetic field in the region between them, (a) Derive the expression for the magnitude B of the magnetic field at a point on the axis a distance x to the right of point P , which is midway between the coils, (b) Graph B versus x for x = 0 to x = a /2. Compare this graph to one for the magnetic field due to the right-hand coil alone, (c) From part (a), obtain an expression for the magnitude of the magnetic field at point P . (d) Calculate the magnitude of the magnetic field at P if N = 300 turns, I = 6.00 A, and a = 8.00 cm. (e) Calculate dB/dx and d 2 B / dx 2 at P ( x = 0). Discuss how your results show that the field is very uniform in the vicinity of P . Figure P28.67
CALC Helmholtz Coils . Figure P28.67 is a sectional view of two circular coils with radius a. each wound with N turns of wire carrying a current I , circulating in the same direction in both coils. The coils are separated by a distance a equal to their radii. In this configuration the coils are called Helmholtz coils; they produce a very uniform magnetic field in the region between them, (a) Derive the expression for the magnitude B of the magnetic field at a point on the axis a distance x to the right of point P , which is midway between the coils, (b) Graph B versus x for x = 0 to x = a /2. Compare this graph to one for the magnetic field due to the right-hand coil alone, (c) From part (a), obtain an expression for the magnitude of the magnetic field at point P . (d) Calculate the magnitude of the magnetic field at P if N = 300 turns, I = 6.00 A, and a = 8.00 cm. (e) Calculate dB/dx and d 2 B / dx 2 at P ( x = 0). Discuss how your results show that the field is very uniform in the vicinity of P . Figure P28.67
CALC Helmholtz Coils. Figure P28.67 is a sectional view of two circular coils with radius a. each wound with N turns of wire carrying a current I, circulating in the same direction in both coils. The coils are separated by a distance a equal to their radii. In this configuration the coils are called Helmholtz coils; they produce a very uniform magnetic field in the region between them, (a) Derive the expression for the magnitude B of the magnetic field at a point on the axis a distance x to the right of point P, which is midway between the coils, (b) Graph B versus x for x = 0 to x = a/2. Compare this graph to one for the magnetic field due to the right-hand coil alone, (c) From part (a), obtain an expression for the magnitude of the magnetic field at point P. (d) Calculate the magnitude of the magnetic field at P if N = 300 turns, I = 6.00 A, and a = 8.00 cm. (e) Calculate dB/dx and d2B/dx2 at P(x = 0). Discuss how your results show that the field is very uniform in the vicinity of P.
You're on an interplanetary mission, in an orbit around the Sun. Suppose you make a maneuver that brings your perihelion in closer to the Sun but leaves your aphelion unchanged. Then you must have
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sped up at perihelion
sped up at aphelion
slowed down at perihelion
slowed down at aphelion
The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE ONLY TRIGNOMETRIC FUNCTIONS (SIN/TAN/COS, NO LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!
The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE DO NOT USE LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!
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