[Q]: Objective: Adding foam to the helmet
[A]: Hot glue foam to the inside of the plastic bucket everywhere except the face area.

[Q]: Objective: make cabinet speaker
[A]: cut holes in wood place in cabinet glue speakers and connect

[Q]: Objective: what is the formula for acceleration
[A]: acceleration is the change in the velocity, divided by the time. Acceleration has a magnitude (a value) and a direction. The direction of the acceleration does not have to be the same as the direction of the velocity. The units for acceleration are meters per second squared (m/s2). a = acceleration (m/s2)

[Q]: Objective: How to clean a smoking pipe.
[A]:
Use a fine-tooth pipe cleaner along the inside of the pipe.