The Resistivity of Gold Is $2.44 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m }$

question 61

Multiple Choice

The resistivity of gold is $2.44 \times 10 ^ { - 8 } \Omega \cdot \mathrm { m }$ at a temperature of $20 ^ { \circ } \mathrm { C }$ . A gold wire that is $0.50 \mathrm {~mm}$ in diameter and $44 \mathrm {~cm}$ long carries a current of $380 \mathrm {~mA}$ . How many electrons each second pass a given cross section of the wire at $20 ^ { \circ } \mathrm { C } ? \left( e = 1.60 \times 10 ^ { - 19 } \mathrm { C } \right)$

• A) \(2.4 \times 10 ^ { 18 }\)
• B) \(2.4 \times 10 ^ { 17 }\)
• C) \(6.3 \times 10 ^ { 15 }\)
• D) \(2.8 \times 10 ^ { 14 }\)
• E) \(1.2 \times 10 ^ { 22 }\)

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Neurochemical Process

Involves the interactions and functions of neurotransmitters, chemicals that transmit signals across a neurosynaptic gap from one neuron to another in the brain.

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The subjective perception and interpretation of sensory input from the environment.

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The theory that certain neurons or groups of neurons in the brain are dedicated to responding to very specific stimuli.

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