hannahkharel2

10.10.2020 • 

Physics

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?

Ответ:

danyelleearly12

26.10.2021

Physics

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Mechanical(ME) energy, in physical sciences, is the sum of kinetic energy (KE) and potential energy (PE). Below are the calculation in obtaining the energies,
 
     (1) KE =   0.5mv²     =  0.5(0.1 kg) x (2 m/s)² = 0.2 J
     (2) PE =    md          = (0.1 kg) x (1.5 m)        = 0.15 J
      (3) ME =  KE + PE = 0.2 J + 0.15 J               = 0.35 J

Thus, the mechanical energy is 0.35 Joules. 

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