A Uniform U-Tube Is Partially Filled with Water

question 11

Multiple Choice

A uniform U-tube is partially filled with water.Oil, of density 0.75 g/cm³, is poured into the right arm until the water level in the left arm rises 3 cm.The length of the oil column is then:

• A)2.25 cm
• B)8 cm
• C)6 cm
• D)4 cm
• E)need to know the cross-sectional area of the U-tube

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Definitions:

Leptin

A hormone produced by fat cells that helps to regulate body weight by inhibiting hunger and thus reducing food intake.

Estrogen

A group of steroid hormones that play a crucial role in the development and regulation of the female reproductive system and secondary sexual characteristics.

Synaptic Pruning

The process by which extra neurons and synaptic connections are eliminated in the brain to increase the efficiency of neuronal transmissions.

Dendrites

The branched extensions of a neuron that receive signals from other neurons.