1. stephanie schneider is running down the street at 10 m/s. she sees a double-tall latte on
the road ahead of her and starts sprinting. after 5 seconds have passed, stephanie is
running at 15 m/s. assuming she does not change direction, what was stephanie's
acceleration?

Stephanie's acceleration is  1 m/.

Explanation:

In the present case, the initial velocity of the runner is given as 10 m/s. After 5 s, the runner runs with velocity of 15 m/s. If there is no change in direction, then the acceleration can be found easily as the change in velocity per unit time.

So,

Thus, the acceleration will be 1 m/.

So the change in velocity will lead to an acceleration of 1 m/.

For longitudinal waves, amplitude is the distance from rest to crest.

Explanation:

Longitudinal Waves.

In a longitudinal wave the particle displacement is parallel to the direction of wave propagation.

longitudinal waves properties includes wavelength, amplitude, period, frequency and wave speed. However instead of peaks and troughs, longitudinal waves have compressions and rarefactions.

The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position. In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.

For longitudinal waves, amplitude is the distance from rest to crest.