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Scilla [17]
3 years ago
6

1. In a certain semiconducting material the charge carriers each have a charge of 1.6 x 10-19 C. How many are entering the semic

onductor per second when the current is 2.0 nA?
Physics
1 answer:
Gennadij [26K]3 years ago
5 0

Answer:

The number of charges is 1.25 × 10¹⁰

Explanation:

Current is the amount of charge flowing through a conductor per second. The formula for current (I) is given as:

I = Q/t

Where Q is the charge flowing in coulombs and t is the time taken in seconds.

Given that I = 2.0 nA = 2 × 10⁻⁹ A and t = 1 sec

I = Q / t

Q = It =  2 × 10⁻⁹ × 1 =  2 × 10⁻⁹ C

Since each charge = 1.6 x 10⁻¹⁹ C, therefore:

The number of charges = 2 × 10⁻⁹ C / 1.6 x 10⁻¹⁹ C = 1.25 × 10¹⁰

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dsp73

Answer:

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Explanation:

z = \sqrt{3x^2 + 3y^2}

Relation between the cartesian and polar coordinates

x = r cos ∅

y = r sin ∅

z = \sqrt{3x^2 + 3y^2} = \sqrt{3r}

next we calculate the surface charge density of the cone

б ( r, ∅ ) = xyz^2 = 3r^4 sin∅ cos∅

Charge given as

Q = ∫ б(r,∅ )ds

   = ∫ б(r,∅ ) \sqrt{1 +( \frac{dz}{dx})^2 + (\frac{dz}{dx} )^2 }   dA

after integration

Q  = ∫ б(r,∅ ) 2dA

Attached below is the remaining part of the solution

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3 years ago
PLEASE help me!!! ASAP!! Ill mark you as brainliest!!!!
MakcuM [25]

Answer:

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Explanation:

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8 0
3 years ago
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olganol [36]
2 -An invasive species is a species that is not native to a specific location (an introduced species), and that has a tendency to spread to a degree believed to cause damage to the environment, human economy or human health.[2]

The term as most often used applies to introduced species that adversely affect the habitats and bioregions they invade economically, environmentally, or ecologically. Such species may be either plants or animals and may disrupt by dominating a region, wilderness areas, particular habitats, or wildland–urban interface land from loss of natural controls (such as predators or herbivores). This includes plant species labeled as exotic pest plants and invasive exotics growing in native plant communities.[3][4][5][6] The European Union defines "Invasive Alien Species" as those that are, firstly, outside their natural distribution area, and secondly, threaten biological diversity.[7][8] The term is also used by land managers, botanists, researchers, horticulturalists, conservationists, and the public for noxious weeds.[9]
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pychu [463]
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Answer:

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Explanation:

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