How did scientist obtain environmental DNA (eDNA) from carp in the waterways near Chicago?

Explanation:

they capture live fish and extract dna directly from their tissues. ... they collect and filter water samples to isolate the dna carp left behind.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft