The diagram below shows structures of the endocrine system. Hormones that regulate the menstrual cycle are secreted by
a. A and D
b. B and F
c. C and E
d. F and A

A1,200 kg car is accelerated at 3.7 m/s2. what force was needed to produce this acceleration? a. 4,440 n b. 324.3 n c. 4,388 n d. 304.3 n

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?