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Ostrovityanka [42]
4 years ago
6

In the diagram, ∠D is b

Physics
1 answer:
Degger [83]4 years ago
3 0

Answer:

The answer is B

Explanation:

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In a thunderstorm, electric charge builds up on the water droplets or ice crystals in a cloud. Thus, the charge can be considere
jolli1 [7]

1) 333.6 C

In order to have breakdown, the electric field at the surface of the cloud must be equal to the breakdown electric field:

E=3.00\cdot 10^6 N/C

The electric field strength at the surface of a charged sphere is given by

E=\frac{1}{4\pi \epsilon_0} \frac{Q}{R^2}

where

\epsilon_0 = 8.85\cdot 10^{-12} C^2/(N^2 m^2) is the vacuum permittivity

Q is the charge on the sphere

R is the radius of the sphere

Here we have a cloud of radius

R = 1.00 km = 1000 m

So we can re-arrange the previous equation in order to find the charge on the cloud:

Q=4\pi \epsilon_0 ER^2=4\pi (8.85\cdot 10^{-12})(3.00\cdot 10^6)(1000)^2=333.6 C

2) 2.08\cdot 10^{21} excess electrons

The total charge of the cloud must be (in magnitude)

Q = 333.3 C

We know that one electron carries a charge of

e = 1.6 \cdot 10^{-19}C

The total charge is just given by the charge of each electron multiplied by the number of excess electrons in the cloud:

Q=Ne

where

N is the number of excess electrons

Solving for N, we find:

N=\frac{Q}{e}=\frac{333.3 C}{1.6\cdot 10^{-19} C}=2.08\cdot 10^{21}

6 0
3 years ago
If a freely falling object were equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s², then i
babymother [125]

Answer:

20 m/s

Explanation:

The acceleration of an object determines the increase in velocity per second.

In this case the acceleration is 20m/s^2.

a=\frac{v}{t}=\frac{\frac{20m}{s}}{s}

That is, the increase is 20m/s each second.

I hope this is useful for you

Regards

7 0
4 years ago
Read 2 more answers
Which series of energy transfers happens when light from the sun is used to power a light bulb?
sergij07 [2.7K]

Answer:

b. Light ➪ mechanical ➪ electrical

6 0
3 years ago
1. Explain a stretching routine for your work environment. As you consider your routine, keep in mind the specific individuals w
weeeeeb [17]

Answer:

Explanation:

A stretching routine should target most of the main muscles in the body and at least one stretching exercise per section of the body. Also in a work environment since individual's sizes, ages, and cultures vary you should design a routine that is for beginners and very easy and effective. Regardless, each individual should be able to move at their own pace and push as far as they are physically able. One such routine would be the one in the attached picture below which targets all major areas, is easy and effective. It starts at the neck muscles and works its way down the arms, back, and legs.

3 0
3 years ago
The unit of length most suitable for measuring the thickness of a cell phone is a
Elis [28]

centimeter or millimeter.

Explanation:

The unit of length most suitable for measuring the thickness of a cell phone is centimeter or millimeter.

Length refers to how long a material is.

  • There are different units of length.
  • Smaller units that are microscopic are used to measure length dimensions that are very small
  • For example, nanometre is used to express microscopic length values.
  • Centimeters and millimeters are used for small dimensions that we can easily see.
  • Longer lengths can take the order of a yard, kilometer, miles e.t.c

Learn more:

Length brainly.com/question/13035995

#learnwithBrainly

8 0
4 years ago
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