i think its iron...
<span>Presence of trace elements, irradiation and iron impurities give the gem its purplish color .
:))
merry christmas</span>
Answer:
Rest and motion are the relative terms because they depend on the observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body.
0.4375 m/s^2
Acceleration is change in velocity over time
Change in velocity (Vf-Vi) 9.7m/s - 6.2m/s = 3.5 m/s
Time is 8 seconds
Acceleration = 3.5m/s / 8s = 0.4375 m/s^2
<span>when a wave causes vibration in a nearby object that matches the frequency of the wave, the phenomenon that occurs is called resonance.
It produces a sound of larger amplitude as a result of vigorous vibration of the body.
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Animal communication on khan academy
