Four equal masses m are so small they can be treated as points, and they are equally spaced along a long, stiff wire of neglible mass. The distance between any two adjacent masses is l. What is the rotational inertia, Icm, of this system about its center of mass?A.) (1/2)ml^2 B.) ml^2 C.) 5ml^2 D.) 6ml^2 E.) 2ml^2 F.) 3ml^2 G.) 7ml^2 H.) 4ml^2

d) the number of neutrons plus the number of protons

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures

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