Suppose that the price level is constant and the investment decreases sharply. How would you show this decrease in the aggregate expenditures model? What would be the outcome for real GDP? How would you show this fall in investment in the aggregate demand-aggregate supply model assuming the economy is operating in what, in effect is a horizontal section of the aggregate supply curve?

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.

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank