Can you solve the BOWL RIDDLE? ft. Kurt Hugo Schneider Part 1/3

Well this is easy. 25F is below freezing (32F) so that bucket is full of ice and the king will sit on top of the ice until it melts. Meanwhile the other bucket has water of 25C whichis quite warm and not frozen so the king will sink to the bottom relatively immediately minus water resistance slowing it down.
12:21 to 21:12, 8 hours 49 minutes or 11:11 and 11:11 so no time difference. 12:12 to 21:21 is 9 hours 9 minutes. no 0 or 4 and 5 are used because there are no hours 30 or 40 and you stipulated the sequence can only include 1 through 4.  I am assuming you are not going from PM to AM but only AM to PM.
Place a flat object that will cover the open end of the bowl and then flip it over carefully so as not to spill the water. the ping pong ball will be at the top of the water and near the sensor at the bottom of the bowl.