PLEASE HELP! :) Frequency describes the rate in which waves move through a given location. In the simulation, the airplane emits waves
as it travels. The closer together the waves appear, the higher their frequency appears.
Imagine you're standing at the center of the simulation, and the airplane flies directly overhead with an object speed of 50
meters per second. From your perspective, how does the frequency of the waves appear to change as the airplane
approaches and then passes you?

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

What is the final velocity of the initial velocity of 25 and -50?

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)