A cone of mass m is dropped so that it falls a distance h and then penetrates styrofoam placed on the ground. The magnitude of the styrofoam resisting force to penetration is cx^2, where c is a constant and x is the penetration distance measured downward from the top surface of styrofoam. Calculate the value of mass m, if the cone comes to rest at x.

i think they are all correct

explanation:

they seem good

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015

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.