Determining whether clean groundwater has become dirty and what caused any contamination is a complex pursuit. stephen osborn and three colleagues from duke university set out to learn whether drinking water was really being contaminated by nearby hydrofracking. osborn’s team focused on sites in northeastern pennsylvania and adjacent new york, where the marcellus shale formation overlies the utica shale formation. the sites they tested are indicated in the map below.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

i think the answer is a, hope this : )

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