(1) Find the mass of the air at 20°C in a living room with a 3.66 m × 5.45 m floor and a ceiling of 3.00 m high. (2)Determine the separation distance between two protons if the magnitude of the electric force between these two particles is 2.3×10-26 N. (3) A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2 m length of wire with a uniform radius of 0.40 cm. Calculate the resistivity of the wire.

(1) Find the mass of the air at 20°C in a living room with a 3.66 m × 5.45 m floor and a ceiling of 3.00 m high. (2)Determine the separation distance between two protons if the magnitude of the electric force between these two particles is 2.3×10-26 N. (3) A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2 m length of wire with a uniform radius of 0.40 cm. Calculate the resistivity of the wire.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 83CP: A particle accelerator produces a beam with a radius of 1.25 mm with a current of 2.00 mA. Each...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

(1) Find the mass of the air at 20°C in a living room with a 3.66 m × 5.45 m floor and a
ceiling of 3.00 m high.

(2)Determine the separation distance between two protons if the magnitude of the electric
force between these two particles is 2.3×10-26 N.

(3) A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2 m length
of wire with a uniform radius of 0.40 cm. Calculate the resistivity of the wire.

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