In another physics experiment, carts run along a frictionless, level track. Cart A is 1 kg and Cart B is 2 kg. Initially cart A is moving to the right at 2.0 m/s and cart B is moving to the left at 7.0 m/s. After they collide, Cart B is moving to the left at 3.5 m/s. What is the magnitude of the velocity of Cart A?

= 5 m/s

Explanation: For collisions, use linear momentum, whose formula is: P = m.v and knowing the law of conservation states that momentum of a closed system is constant in time, i.e. initial momentum equals final momentum:

Suppose the referential for velocity is positive to the right:

The negative sign, in this case, indicates cart A is going to the left.

The magnitude of velocity of cart A is 5 m/s

the dictionary definition of ubiquitous is "present, appearing, or found everywhere".

i think the correct answer would be adjustments in life roles.  this causes for one to adjust or change totally his/her career or lifestyle since the present is not beneficial to the life role he is at. for instance, you became a mother you would of course stop going to malls and enjoying life outside. you would be staying at home taking care of your child.