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rjkz [21]
3 years ago
9

A solid spherical conductor has a radius of 12 cm. The electric field at 24 from the center of the sphere has a magnitude of 640

N/C. What is the charge density (in C/m2) on the sphere
Physics
1 answer:
hoa [83]3 years ago
4 0

Answer:

Charge density on the sphere = 2.2 × 10⁻⁸ C/m²

Explanation:

Given:

Radius of sphere (r) = 12 cm = 0.12 m

Distance from the electric field R = 24 cm = 0.24 m

Magnitude (E) = 640 N/C

Find:

Charge density on the sphere

Computation:

Charge on the sphere (q) = (1/K)ER²            (K = 9 × 10⁹)

Charge on the sphere (q) = [1/(9 × 10⁹)](640)(0.24)²

Charge on the sphere (q) = 4 × 10⁻⁹ C

Charge density on the sphere = q / [4πr²]

Charge density on the sphere = [4 × 10⁻⁹] / [4(3.14)(0.12)²]

Charge density on the sphere = [4 × 10⁻⁹] / [0.18]

Charge density on the sphere = 2.2 × 10⁻⁸ C/m²

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Explanation:

Given parameters:

Mass of car = 1000kg

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final speed = 30m/s

time taken = 20s

For centripetal force:

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Unknown:

Average speed  = ?

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Average force = ?

Centripetal force = ?

Solution:

Average speed is the rate of change of distance with time.

In this problem, we were given two speeds and we will simply just find their average. We sum them up and divide by 2

  Average speed =  \frac{initial speed + final speed }{2}

 Average speed = \frac{10 + 30}{2} = 20m/s

Acceleration is the change in the velocity or speed of a body with time.

     Acceleration = \frac{final speed - initial speed }{time}

     Acceleration = \frac{30 - 10}{20} = 1m/s²

Average force on the car is the product of its mass and acceleration:

  Acceleration = mass x acceleration

   Acceleration = 1000 x 1 = 1000N

Centripetal force is the inward pull when a body moves round a fixed center.

It is given as:

  F = \frac{mv^{2} }{r}

m is the mass of the body

v is the velocity

r is the radius

input the parameters:

   F = \frac{1000 x 5^{2} }{30} = 833.3N

learn more:

Acceleration brainly.com/question/11025333

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#learnwithBrainly

6 0
4 years ago
I take 1.0 kg of ice and dump it into 1.0 kg of water and, when equilibrium is reached, I have 2.0 kg of ice at 0°C. The water w
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Answer:

.c. −160°C

Explanation:

In the whole process one kg of water at  0°C loses heat to form one kg of ice and heat lost by them is taken up by ice at −160°C . Now see whether heat lost is equal to heat gained or not.

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heat gained by ice at −160°C to form ice at  0°C

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How far would a horse that rides at 5.5 m/s travel in 6.3 minutes?
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The​ half-life of a certain radioactive substance is 12 hours. There are 19 grams present initially. a. Express the amount of su
neonofarm [45]

Answer:

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