Una barra de estaño tiene la forma de un prisma recto de 4cm2 de base y 1m de longitud a la temperatura de 68º F. Determine la longitud y el volumen de esa barra a 518º F. Considere el coeficiente de dilatación lineal del estaño a = 20 x10-6ºC-1. me pueden ayudar con este ejercicio?

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.