1. A rubber cube of volume 0.8cm3 falls vertically through 6m onto a concrete floor. The cube .
experiences a maximum strain of 1.11% and remains in contact with the ground for 0.8s
before rebounding vertically upwards. Given that the cube impacted with the ground such
that one face of the cube was in complete contact with the ground, find the maximum EPE
stored in the cube at maximum strain.
Density of the cube = 0.9kgm3
A student suggests that the Ek of the cube on impact should be equal to the maximum EPE
stored. Justify whether you agree with the student.​

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?