Answer:
Negligible weights is a change so minor or insignificant to be deemed to have no effect on weight or balance.
Net force
As it's negative the box will move left
It'll be 152 Hz at the exact instant the bumblebee
is right at the tip of your nose, on his way past you.
Before he gets there, while he's coming at you,
he sounds like a frequency higher than 152 Hz.
After he passes by, and is going away from you,
he sounds like a frequency lower than 152 Hz.
