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 pressure on A1 is __________.
Definitions:
Neuromuscular Junction
A synapse between a motor neuron and a skeletal muscle cell, where electrical signals or impulses are transmitted to initiate muscle contraction.
Myofilaments
The thin and thick protein filaments within muscle cells that are responsible for muscle contraction.
Muscle Tissue
A type of tissue in animals specialized for contraction, facilitating movement of the body or materials within the body.
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