1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
adoni [48]
4 years ago
10

How much work must be done to bring three electrons from a great distance apart to 3.5×10−10 m from one another (at the corners

of an equilateral triangle)?
Physics
1 answer:
-Dominant- [34]4 years ago
8 0

Answer:

1.97 × 10⁻¹⁸J

Explanation:

Charge of an electron  q = -1.9 × 10⁻¹⁹C

Length of one side of the equilateral triangle at whose corners electrons are placed d = 3.5 × 10⁻¹⁰m

Coulomb constant k = 8.99 × 10⁹Nm²/C²

electrostatic potential = (3 kq²) / d

= (3 × 8.99 × 10⁹ × (-1.6 × 10⁻¹⁹)²) / 3.5 × 10⁻¹⁰

= 1.97 × 10¹⁸J

You might be interested in
When we look at a star
stiv31 [10]

I'm not really sure what specific answer they're looking for, but if it's an open-ended question, then let's think about it this way...

A light year, is the distance it takes for light to travel in a year. If an object is 50,000 light years away, then by the time the light travels to us, 50,000 years has passed. We are looking at a 50,000 year old image of that object. (ignoring gravity and spatial expansion fun stuffs)

4 0
4 years ago
what occurs in a chemical reaction? A. Reactants are formed without chemical bonds being broken B. Reactants are formed from pro
Ann [662]
The answer is D. Products are formed from reactants by the breaking and forming of new bonds. 
3 0
3 years ago
Read 2 more answers
1. A student gathered two boxes of the same size made of different materials: glass and clear plastic. She placed them on a wind
Kobotan [32]

Answer:

1.  to relate the type of box material to the temperature of the air within the box

2. Question is incomplete

3. scatterplot

Explanation:

1. The only thing done differently in this experiment is the type of material used in making the boxes, hence the experiment must be about that. Before proceeding to answering this question, we must have this at the back of our minds.

We can gather from the experiment that the boxes are of the same size and were subjected to sunlight for an hour (the same time duration for both). Hence, the temperature of the air inside the box will only be affected by the type of material the box is made of since the boxes have the same size and were subjected to sunlight for the same duration.

From the options provided, the best description for this experiment is; to relate the type of box material to the temperature of the air within the box.

2. The question is incomplete. The value for speed/velocity needed to calculate the average time is missing.

However, the formula needed here is velocity = distance ÷ time

3. There are two variables in this experiment; distance and time

The type of graph that shows two variables on it (of the options provided) is the scatterplot.

8 0
4 years ago
Humans can typically perceive frequencies that range from 20 Hz–20 kHz. Dogs can hear sounds up to 45 kHz. Dog whistles produce
Aleksandr [31]
Pitch is directly related to the frequency of the sound. In this item, we are given that the frequency of the sound is higher compared to those which are audible to the human being's ears. The pitch therefore of the dog's whistle is high. 

On the other hand, the frequency and the wavelength of a certain wave are inversely proportional. This means that the high frequency wave will have a short wavelength. 

Hence, the answer to this item would have to be "high pitch with a short wavelength" 

The answer to this item is the second option. 
6 0
3 years ago
Read 2 more answers
What percentage of the intensity gets through both polarizers?
sp2606 [1]

Answer:

if the two polarizers have the same direction the transmitted light is 50% of the incident and if the two polarizers are at 90º the transmitted light is zero

Explanation:

The incident light is generally random, that is, it does not have a polarization plane, when the first polarized stops by half, this already polarized light arrives at the second polarizer and the causticity passes

                I = I₀ cos² θ

therefore if the two polarizers have the same direction the transmitted light is 50% of the incident and if the two polarizers are at 90º the transmitted light is zero

8 0
3 years ago
Other questions:
  • Janaki Temple and Pashupatinath Temple are increasing our pride how​
    8·1 answer
  • Which factor affects the force of gravity between objects? Check all that apply. A.direction
    6·2 answers
  • When switch S is open, the voltmeter across the battery reads 1.52V. When theswitch is closed , the voltmeter reading drops to 1
    11·1 answer
  • Calculate the average speed 
    7·1 answer
  • An engine can exert a force of 1,000 newtons. How fast can this engine
    7·1 answer
  • Two objects, A and B, are 10 m apart. Objects C and D are 20 m apart. The gravitational attraction between objects C and D is gr
    9·2 answers
  • Which of the following is characteristic of the elements in a pattern?
    10·1 answer
  • How far has a ball traveled after 3.6 seconds when thrown downward at a<br> velocity 3.75 m/s?
    8·2 answers
  • To hit a fish that he sees beneath the water, where should he aim?
    8·1 answer
  • Si el número masico del elemento litio es 7 ¿cual es su nucleo?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!