A whip ride is provided for amusement parks. One aspect of the present disclosure provides An apparatus configured to wirelessly communicate. The filter circuit can be realized in the filter. When it is determined that the number of contents is equal to or larger than the predetermined number, the search processor issues an additional question. The pre-calculation block receive at least one earlier input signal and generate additional intermediate signals. The conductive powder consists of core particles of inorganic material or organic resin, an interlayer of silicon-base polymer, and a metal plating.