How does a single fixed pulley, like the one seen here, help you do work? A) Changes the direction of the force.
B) Increases the amount of applied force.
C) Decreases the amount of applied force.
D) Allows you to pull the rope a shorter distance.

the answer will be B

Explanation:

because you are pulling the rope, pullimg applies FORCE. the bucket goes up because you applied FORCE

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.