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e-lub [12.9K]
3 years ago
6

Earth's lower atmosphere contains negative and positive ions that are produced by radioactive elements in the soil and cosmic ra

ys from space. In a certain region, the atmospheric electric field strength is 118 V/m and the field is directed vertically down. This field causes singly charged positive ions, at a density of 503 cm-3, to drift downward and singly charged negative ions, at a density of 628 cm-3, to drift upward (see the figure). The measured conductivity of the air in that region is 2.69 × 10-14 (Ω-m)-1. Calculate (a) the magnitude of the current density and (b) the ion drift speed, assumed to be the same for positive and negative ions.
Physics
1 answer:
Morgarella [4.7K]3 years ago
5 0

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An engine absorbs 1.69 kJ from a hot reservoir at 277°C and expels 1.25 kJ to a cold reservoir at 27°C in each cycle.
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Given,

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8 0
3 years ago
A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 k
rewona [7]

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                                     =    (1 kg)  (2.25 m²/s²)

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Now is a good time to review the Law of Conservation of Energy:

                     Energy is never created or destroyed. 
                     If it seems that some energy disappeared,
                     it actually had to go somewhere.
                     And if it seems like some energy magically appeared,
                     it actually had to come from somewhere.

The small ball has 2.25 joules of kinetic energy before the collision.
If the small ball doesn't have a jet engine on it or a hamster inside,
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3 0
3 years ago
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Hope this helps!

7 0
3 years ago
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