How does a change in the external pressure on a container of gas affect the volume?

A.
as external pressure increases volume increases.

B.
as external pressure increases volume decreases.

C.
as external pressure decreases volume decreases

D.
a change in external pressure has no effect on volume

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

cell/ tissue/ organ/ organ system/ body

because it travels in smaller waves then all other colors, causing it to be the most visible color