If it sounds like a humming that is like: mmmMM...MMMmmm...MMMmMmm...
then it may be that your AC is on or that you need to raise your idle speed. It may also be that your car is quiet because of the low accel that you can hear your muffler making that noise.
no but its most likely your catalitic converter get under the car and bang on the cat it will most likely rattle the inside is broke
It would make it go faster.
There is only acceleration if the car's velocity changes. If it moves at a constant velocity, then there is no acceleration.
because the gears are grinding together if its an old car it will make a louder crack sound
There is no sound if they are in good working order.
The point of a car amplifier is the make music sound better, so in most cases all amplifier make music sound better.
vroom vroom
It is good of a car has a slow acceleration rate. This means that the car will probably be great on gas.
What is a "flapping sound" Birds?
No, acceleration is a vector quantity.
Usually it'll be a grinding sound.
all u have to do is put some sugar in the gas tank, its an old trick to make your car sound more powerful than it is, i do it all the time