Which list gives the correct numbers of subatomic particles for a neutral atom of helium? O A. Two protons, two neutrons, two electrons O B. Two protons, two neutrons, four electrons O C. Two protons, four neutrons, six electrons O D. Four protons, four neutrons, four electrons

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