What is torque?
What will be an ideal response?
Torque is a force that does work with a twisting or turning motion.
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Dust baths _____
a. are part of the mating ritual b. keep feathers clean c. expose chickens to external parasites d. are used to establish the pecking order
Todas las siguientes acciones ayudarán a reducir el riesgo de dermatitis ocasionada por el cemento, excepto _____.
a. bañarse después de cada turno b. usar anteojos o una más- cara c. usar jabón o loción a base de agua d. usar guantes y botas de caucho
What color should hunters wear on at least one article of clothing? Why?
What will be an ideal response?
The magnetic circuit shown in Figure P18.35 is a very simplified representation of devices used as surface roughness sensors. The stylus is in contact with the surface and causes the plunger to move along with the surface. Assume that the flux ? in the gap is given by the expression ? = ? (x), where ? is a known constant and (x) is the reluctance of the gap. The emf e is measured to determine the surface profile. Derive an expression for the displacement x as a function of the various parameters of the magnetic circuit and of the measured emf. (Assume a frictionless contact between the moving plunger and the magnetic structure and that the plunger is restrained to vertical motion only. The cross-sectional area of the plunger is A.)
