For the purpose of measuring the electric resistance of shoes through the body of the wearer standing on a metal ground plate, the American National Standards Institute (ANSI) specifies the circuit shown in Figure P27.14. The potential difference Δ V across the 1.00-MΩ resistor is measured with an ideal voltmeter. (a) Show that the resistance of the footwear is R shoes = 50.0 V − Δ V Δ V (b) In a medical test, a current through the human body should not exceed 150 μ A. Can the current delivered by the ANSI-specified circuit exceed 150 μ A? To decide, consider a person standing barefoot on the ground plate. Figure P27.14
For the purpose of measuring the electric resistance of shoes through the body of the wearer standing on a metal ground plate, the American National Standards Institute (ANSI) specifies the circuit shown in Figure P27.14. The potential difference Δ V across the 1.00-MΩ resistor is measured with an ideal voltmeter. (a) Show that the resistance of the footwear is R shoes = 50.0 V − Δ V Δ V (b) In a medical test, a current through the human body should not exceed 150 μ A. Can the current delivered by the ANSI-specified circuit exceed 150 μ A? To decide, consider a person standing barefoot on the ground plate. Figure P27.14
For the purpose of measuring the electric resistance of shoes through the body of the wearer standing on a metal ground plate, the American National Standards Institute (ANSI) specifies the circuit shown in Figure P27.14. The potential difference ΔV across the 1.00-MΩ resistor is measured with an ideal voltmeter. (a) Show that the resistance of the footwear is
R
shoes
=
50.0
V
−
Δ
V
Δ
V
(b) In a medical test, a current through the human body should not exceed 150 μA. Can the current delivered by the ANSI-specified circuit exceed 150 μA? To decide, consider a person standing barefoot on the ground plate.
What is the force (in N) on the 5.4 µC charge shown below? (Express your answer in vector form.) −3.1 µC5.4 µC9.2 µC6.4 µC
An ideal gas in a sealed container starts out at a pressure of 8900 N/m2 and a volume of 5.7 m3. If the gas expands to a volume of 6.3 m3 while the pressure is held constant (still at 8900 N/m2), how much work is done by the gas? Give your answer as the number of Joules.
The outside temperature is 25 °C. A heat engine operates in the environment (Tc = 25 °C) at 50% efficiency. How hot does it need to get the high temperature up to in Celsius?
Chapter 28 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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How To Solve Any Resistors In Series and Parallel Combination Circuit Problems in Physics; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=eFlJy0cPbsY;License: Standard YouTube License, CC-BY