Overall, Through Space, Galaxies Are

question 193

Multiple Choice

Overall, through space, galaxies are

• A) distributed uniformly, out to the farthest distances.
• B) clustered together in several high-density centers with very little matter linking them together.
• C) concentrated around one position in space, presumably the original site of the Big Bang.
• D) concentrated on filaments separated by huge open spaces or voids.

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Definitions:

Ackerman Arms

Components of the steering mechanism that help achieve different turning radii for the inner and outer wheels, improving cornering.

Pitman Arm

A steering linkage arm that connects a steering gear to a drag link. A Pitman arm is usually splined to the steering gear sector shaft. In a typical steering gear, the Pitman arm converts the rotary motion of the sector shaft into linear motion at the drag link plus adds leverage.

Steering Control Arm

The steering control arm is a vital component of the steering system, connecting the steering knuckle to the vehicle's frame or body, thus allowing for effective steering wheel control over the vehicle's direction.

Drag Link

A connecting linkage between the steering gear Pitman arm and the steering control arm. It is sometimes adjustable.