stamamen-
Okey-dokey, you want more answers.
Here you go:
b) The balloon will move forward, stay in the same place, or move backward relative to the car. Since gas (i.e. regular air in this case) is compressible, it will undergo slight compression toward the read of the car due to inertial drag. Therefore:
B1) Under normal acceleration, the compression is negligible, so the balloon will move forward as initially explained.
B3) Under extreme acceleration, the air in the car will be compressed backward and the balloons inertia will combine to such a great extent that the balloon will actually move backward.
6) a) You saw the table in half. You then put the two halves together, making a whole. You exit the blender thru the whole.