Two Small Insulating Spheres Are Attached to Silk Threads and Aligned

question 677

Multiple Choice

Two small insulating spheres are attached to silk threads and aligned vertically as shown in the figure.These spheres have equal masses of 40 g,and carry charges q₁ and q₂ of equal magnitude 2.0 μC but opposite sign. The spheres are brought into the positions shown in the figure,with a vertical separation of 15 cm between them.Note that you cannot neglect gravity.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²) The tension in the lower thread is closest to

• A) 1.2 N.
• B) 1.4 N.
• C) 1.6 N.
• D) 1.8 N.
• E) 2.0 N.

Understand the differences between the sympathetic and parasympathetic divisions of the autonomic nervous system.

Identify anatomical structures and their functions within the somatic and autonomic nervous systems.

Recognize how various physiological processes are affected by sympathetic and parasympathetic activities.

Describe the role of receptors in detecting changes within the body.

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Definitions:

Pivot Grammar

A simplified grammatical structure often observed in early child speech, allowing for the construction of sentences around a key pivotal word.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or otherwise sensed, a concept developed during infancy.

Frontal Cortex

A region of the brain involved in decision making, problem-solving, control of purposeful behaviors, consciousness, and emotions.