Um, I not positive, but I think fish don't need oxygen.
25,000 Feet = 7620m
PE = mgh where m is mass, g is gravity accel: 9.8 n h is height
= 90 x 9.8 x 7620
= 6720840J
= 6.72MJ
F = ma where m is mass, a is accel = gravity = 9.8
= 90 x 9.8
= 882N
Accel = gravity = 9.8m/s^2
KE = 1/2mv^2 where m is mass n v is vel
if no wind resistance, PE leaving airplane = KE at net
6720840 = 1/2 x 90 x v^2
v^2 = 149352
v = 386.5m/s
Rocks, earth aging, fossils
Answer: The result of "the upper bound of the density" does not go on the denominator.
So simplified, no. The answer is no.
True because friction happens when two things are rubbed against each other and it creates force and sliding something vigorously against something else can create force.
