How does the Skyscreamer relate to Newton's second law of motion A. As the riders accelerate from rest to reach the same speed, riders with greater
mass experience greater force.
B. When the ride starts spinning, inertia pushes the riders back in their seats.
C. The riders exert an action force on the safety bar. The safety bar exerts the same
amount of force on the riders.

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

3. dark matter

empty space could also be a simple vacuum