In a gaseous mixture of massive molecules and light molecules with the same average ke, which have the greater speed?

they have the same speed.
the massive molecules
cannot be determined
the light molecules

statement #3 on andre"s list is false.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

not too sure thinking all accelerations are pointed down

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