In terms of thermal expansion, why is water unusual?

Water is unusual in terms of thermal expansion because other substances are denser in solid form and less dense in liquid form, while water is denser in liquid form and less dense in solid form. Water bonds in such a way that molecules are help farther apart in solid form than in liquid form.

the rearrangement of particles in a physical change. 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