A Hypodermic Needle Can Be Thought of as a Large

question 33

Multiple Choice

A hypodermic needle can be thought of as a large area pipe leading to a small area pipe that opens into the vein.The diameter of the plunger is 1.2 cm and the needle diameter is 0.15 cm.If the gauge pressure in the vein is 25 mmHg,what minimum force is needed on the plunger in order for a fluid flow into the vein to occur?

• A)0.38 N
• B)0.19 N
• C)0.0060 N
• D)31 N
• E)0.12 N

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Definitions:

Comparative Advantage

The ability of an individual, company, or country to produce a good or service at a lower opportunity cost than competitors, leading to more efficient production and trade.

Absolute Advantage

The capability of a country, individual, or company to produce a greater quantity of a good or service with the same amount of resources as another entity.

Pens

Writing instruments used for applying ink to a surface, typically paper, for writing or drawing.

Pencils

Writing instruments consisting of a narrow, solid pigment core inside a protective casing that prevents the core from breaking or leaving marks on the user's hand.