If an astronomical object's parallax is one-half arcsecond, how many parsecs is it from earth? a. 1/2 b. 1 c. 2 d. 30

thw answer is C. 2

i do not know why! Sorry!

i just took the test and it was right

d. learned preferences i believe is your answer

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be