Two pistons push down on the fluid filling two cylinders connected by a narrow hose,as shown in the figure.The area A1 is 1 square inch,and the area A2 is 10 square inches.A force of 4 pounds is exerted downward on piston 1,as shown. 
-The force F2 needed to keep piston 2 in place is __________.
Definitions:
Parietal Pleura
The outer membrane that lines the inner surface of the chest wall and diaphragm in the thoracic cavity, but does not cover the lungs directly.
Peritonitis
Inflammation of the peritoneum, the thin tissue that lines the inner wall of the abdomen and covers most of the abdominal organs.
"-Itis"
A suffix used in medical terminology to denote inflammation of an organ or tissue.
Inflammation
A biological response to harmful stimuli, including pathogens, damaged cells, or irritants, characterized by redness, warmth, swelling, and pain.
Q2: When a 4-cubic-ft block of wood floats
Q19: like charges do this<br>A)AC<br>B)attract<br>C)critical temperature<br>D)electric current<br>E)DC<br>F)electric field<br>G)negative
Q28: When a car comes to a stop
Q32: During the period of one day,the number
Q39: The pressure on your left palm is
Q62: Doppler radar can<br>A)catch speeders.<br>B)measure the speed of
Q71: When you jump,you accelerate upward because the
Q71: A tire pressure gauge reads 30 psi
Q112: If the temperature of a wire increases,its
Q152: the maximum possible humidity<br>A)bimetallic strip<br>B)Carnot efficiency<br>C)conduction<br>D)convection<br>E)entropy<br>F)evaporation<br>G)heat<br>H)heat engine<br>I)heat