B.
PART A: Which of the following best identifies the central idea of this text?
A. Living creatures have thousands of different cells with genes that determine cel
functions and growth.
The body produces less cells as you get older because adult cells do not need
genes to give them instructions.
Each cell in the human body is unique and stem cells can turn into any cellar
any point in time to replace weak cells.
Stem cells are different from other cells because they stop copying other cells
once a baby is born.

Four objects are being tested to see how they are affected by fluid friction. object w has a surface area of 4.5 cm2, object x has a surface area of 2.5 cm2, object y has a surface area of 6.2 cm2, and object z has a surface area of 3 cm2. which object would experience the most fluid friction?

Distinguish between a transverse wave and a longitudinal wave.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.