A wagon of wood beams needs to be removed from the garage. Is it better for Carlos to push down and forward with 455N at an angle of 25° or Lia to push 350N horizontally? The coefficient of friction is 0.3. The
wagon has a mass of 89kg. Who has the bigger acceleration?

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 doppler effect is used by weather forecasters to measure 

moving clouds