What is another term for weight transfer in the cha-cha dance?

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;

Ithink the answer for this is: an electromagnet is a magnet  with a soft metal core.

The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.