Question

1. what kind of speed is registered by an automobile speedometer: average speed or instantaneous speed?

Explanation:

To determine the type of speed an automobile speedometer registers, we analyze the definitions:

• Average speed is total distance divided by total time over a period.
• Instantaneous speed is the speed at a specific moment.

A speedometer shows the speed of the car at the exact instant it is read (e.g., when you glance at it while driving), not an average over a longer time. Thus, it measures instantaneous speed.

Answer:

Instantaneous speed