Diaphragm...is the muscle that helps in respiration.....there are also some other but....you said flat so diaphragm !
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does this make sense ? I tried to set up the square best I can
Actually, heavier objects fall faster. The difference is infinitesimal, but there is a tiny difference because more mass causes objects to fall faster (e.g. objects fall faster on earth than on the moon). On earth, the different rate of fall between heavier and lighter objects is negligible (because objects are tiny compared to the earth's mass), so objects of different weights fall at virtually the same rate. But not at exactly the same rate. Objects of different weights must accelerate at different rates because accel.
A contour interval is the lines on a topographic map that state the height (from sea level) of the hill, valley, mountain or the ground level.
