Long wavelengths and low frequencies.
Explanation:
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A)0.0714 a second (7*60)/(30*60)=4.284 4.284/60=0.0714
a.Breccia contains angular clasts and conglomerate contains rounded clasts.
The relationship between object distance, image distance, and focal length of a spherical mirror is given by
1/f=1/v+1/u
Where
f= focal length of a spherical mirror (distance between the pole and the principal focus of the mirror)
u= object distance (distance between pole and object)
v= image distance (the distance between pole and image)