What is depicted as the yellow arrows in the following image? (provide a definition) Which makes a bigger current-faster moving electron or slower moving
Answers
Answer:
In the image, we can see that the arrows go from the negative pole to the positive pole.
This image then represents the flow of electrons in the situation (Remember that we define current as the flow of "holes", so current is usually defined in the opposite direction than the flow of electrons).
Second question:
In a current, the electrons usually do not move really fast (in average velocity).
Now, the current flowing in a given material will depend mostly on:
The area of the material (a cable with larger diameter can have a larger electricity than a thin cable) and the material itself (there are some materials that are really good conductors, and there are materials that are bad conductors)
Now, this concept of good/bad conductor can be thought as follows,
A bad conductor has a lot of particles (for example electrons in the inner energy levels) in the way of the flow of electrons, and when the electrons want to move, they may interact with those particles, and then the flow of electrons is diminished.
For a good conductor, those particles do not interact, and there are not a lot of these particles. (Also good conductors have more electrons in the valence level, so there are more electrons that can flow in the material).
Another important factor is the temperature of the material, we know that when we increase the temperature of a material, the particles of this material will have an increment in its kinetic energy, then those particles will be moving a lot, and there is a larger possibility that there will be an interaction with the flowing electrons.
In the case where the object is really cold, the kinetic energy of the particles will be small, and these will be more "ordered", which helps with the current flow.
Then we can conclude that the electricity does not really depend on the speed of the electron, it depends more of the material of the conductor and the cross-section area.
Related Questions
Ethan’s water bottle is 1/2 full. Olivia’s water bottle is 2/6 full. Who has a more filled water bottle?
Answers
Answer:
Ethan's
Step-by-step explanation:
Ethan's is 1/2 and Olivia's simplified to be 1/3.
Ethan needs only 2 to have a full bottle and Olivia need 3 to have a full bottle.
An unconfined compression test was performed to determine the average strength of concrete cylinders (in psi). It is believed that the strength is approximately normally distributed with a standard deviation of 256 psi. A sample of 70 concrete cylinders was taken, and it was found that the average strength was 3000 psi. Find a 91% confidence interval for the true average strength of the concrete.
Be sure to:
• State the value for α.
• State whether you should use z or t and find the appropriate value. Round z-values to 2 decimals. Round t-values to 3 decimals.
• Find the confidence interval (to 2 decimals). State the parameter your confidence interval is for.
• Write a verbal interpretation of your confidence interval.
Answers
Answer:
Explained below.
Step-by-step explanation:
(1)
The confidence level is, 91%.
Compute the value of α as follows:
[tex]\text{Confidence level}\% =(100-\alpha \%)\\\\91% = 100-\alpha \%\\\\\alpha \%=100-91\%\\\\\alpha \%=9\%\\\\\alpha =0.09[/tex]
(2)
As the population standard deviation is provided, i.e. σ = 256 psi, the z value would be appropriate.
The z value for α = 0.09 is,
z = 1.69
(3)
Compute the 91% confidence interval as follows:
[tex]CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}[/tex]
[tex]=3000\pm 1.69\cdot\frac{256}{\sqrt{70}}\\\\=3000\pm 51.71\\\\=(2942.29, 3057.71)[/tex]
(4)
The 91% confidence interval for population mean implies that there is a 0.91 probability that the true value of the mean is included in the interval, (2942.29, 3057.71) psi.
Factor the expression given below. Write each factor as a polynomial in descending order 9x2-1
Answers
The factored expression of 9x^2 - 1 is (3x -1)(3x + 1)
How to factor the polynomial?The polynomial expression is given as:
9x^2 - 1
Express 9x^2 as a perfect square
(3x)^2 - 1
Apply the difference of two squares
(3x -1)(3x + 1)
Hence, the factored expression of 9x^2 - 1 is (3x -1)(3x + 1)
Read more about factoring at:
https://brainly.com/question/19386208
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Which of the following shows the graph of y= 2ex
Answers
Answer: more detail pls
Step-by-step explanation:
Answer:
Im pretty sure it's the third option C
Step-by-step explanation:
What is an expression that is equivalent to 5x
Answers
If im wrong then I’m sorry, I hope I’m right and you get a good grade or score or etc
Zoey had 3/4 of a pizza left after going to a local restaurant last night. Today she eats 1/3 of the remaining pizza for lunch. How much of the original pizza does Zoey have left now?
Answers
Answer:
half of the pizza is left
Step-by-step explanation:
1 ) three quarters are left = 75% of the original pizza
2) she eats one third of the pizza = 1/3 of 75
3) one third of the pizza is 25 %
4) 75-25 = 50
5) 50 is half of the pizza
Find the 2nd Derivative:
f(x) = 3x⁴ + 2x² - 8x + 4
Answers
Answer:
[tex]f''(x)=36x^2+4[/tex]
Step-by-step explanation:
Let's start by finding the first derivative of [tex]f(x)= 3x^4+2x^2-8x+4[/tex]. We can do so by using the power rule for derivatives.
The power rule states that:
[tex]\frac{d}{dx} (x^n) = n \times x^n^-^1[/tex]This means that if you are taking the derivative of a function with powers, you can bring the power down and multiply it with the coefficient, then reduce the power by 1.
Another rule that we need to note is that the derivative of a constant is 0.
Let's apply the power rule to the function f(x).
[tex]\frac{d}{dx} (3x^4+2x^2-8x+4)[/tex]Bring the exponent down and multiply it with the coefficient. Then, reduce the power by 1.
[tex]\frac{d}{dx} (3x^4+2x^2-8x+4) = ((4)3x^4^-^1+(2)2x^2^-^1-(1)8x^1^-^1+(0)4)[/tex]Simplify the equation.
[tex]\frac{d}{dx} (3x^4+2x^2-8x+4) = (12x^3+4x^1-8x^0+0)[/tex] [tex]\frac{d}{dx} (3x^4+2x^2-8x+4) = (12x^3+4x-8(1)+0)[/tex] [tex]\frac{d}{dx} (3x^4+2x^2-8x+4) = (12x^3+4x-8)[/tex][tex]f'(x)=12x^3+4x-8[/tex]Now, this is only the first derivative of the function f(x). Let's find the second derivative by applying the power rule once again, but this time to the first derivative, f'(x).
[tex]\frac{d}{d} (f'x) = \frac{d}{dx} (12x^3+4x-8)[/tex] [tex]\frac{d}{dx} (12x^3+4x-8) = ((3)12x^3^-^1 + (1)4x^1^-^1 - (0)8)[/tex]Simplify the equation.
[tex]\frac{d}{dx} (12x^3+4x-8) = (36x^2 + 4x^0 - 0)[/tex] [tex]\frac{d}{dx} (12x^3+4x-8) = (36x^2 + 4(1) - 0)[/tex] [tex]\frac{d}{dx} (12x^3+4x-8) = (36x^2 + 4 )[/tex]Therefore, this is the 2nd derivative of the function f(x).
We can say that: [tex]f''(x)=36x^2+4[/tex]
Answer:
[tex]y = f(x) = 3 {x}^{4} + 2 {x}^{2} - 8x + 4 \\ \frac{dy}{dx} = 12 {x}^{3} + 4x - 8 \\ \frac{d {}^{2} y}{dx {}^{2} } = 36 {x}^{2} + 4 \\ \boxed{\frac{d {}^{2} y}{dx {}^{2} } = 4(9 {x}^{2} + 1)}[/tex]
f"(x)= 4(9x^2+1)PLS HELP
52
Solve for 44.
4 = [?]
49°
44
Answers
Answer:
angle 4 (the exterior angle) = 101°
Answer:
101
Step-by-step explanation:
first , let angle 4 be x
then
x =52+ 49 (exterior angle of a triangle is equal to sum of opposite interior angles)
=101
hope this helps u
Which table of values could be generated by the equation -10x+5y=15
Answers
9514 1404 393
Answer:
see below
Step-by-step explanation:
I find it convenient to factor 5 from the equation and re-order the left side:
y -2x = 3
This makes it relatively easy to see that the values in the left-most table will satisfy this equation.
__
If we look at the table values for x=2, where all the tables differ, we can easily find the one that works:
1. 7 -2(2) = 3 . . . . this value works in the equation
2. 0.5 -2(2) = -3.5 . . . . no
3. -1 -2(2) = -5 . . . . no
4. 2.5 -2(2) = -1.5 . . . . no
Read the last sentence of "Ain't I a Woman?"
Obliged to you for hearing me, and now old Sojourner ain’t got nothing more to say.
Which best describes the effect of these words?
They remind the audience that Truth has had rich life experience and offers valuable wisdom.
They suggest that the audience has listened to and understood all of Truth’s reasons.
They inform the audience that Truth will not give another speech about women’s suffrage.
They encourage the audience to question Truth’s reasoning and the ideas she has put forth.
Answers
Answer:
They suggest that the audience has listened to and understood all of Truth’s reasons.
Step-by-step explanation:
Obliged to you for hearing me, and now old Sojourner ain’t got nothing more to say.
This Implies that she needs to say nothing more, because the truth was so blaringly obvious that everyone in the crowd understood it. It also implies that no better argument for her cause could be put forward, and none was needed.
The statement that most adequately recounts the impact of the given words is: Option A: They remind the audience that Truth has had rich life experiences and offers valuable wisdom.
Effect of WordsFrom the story of "Ain't I a Woman?", we can see that Sojourner is a strong-headed woman that had gone through serious battles all her life in seeking equal rights of women.
Now, the last sentence from "Ain't I a Woman" given in the question exists to help tell the reader that Truth had encountered standard experiences in his life and as such it promotes useful understanding and ideas.Finally, words used like "obliged" and "old" are descriptive words that help show us that she is a humble, and experienced person.
In conclusion, the correct answer is Option A.
Read more about effect of words at; https://brainly.com/question/14031409
3y(2y+5) solve the problem
Answers
3y×(2y+5)
Multiply each term in the parentheses by 3y
3y×2y+3y×5
Calculate the product
6y²+3y×5
Now we do the same thing only different way
3y×2y
Multiply the numbers
6y×y
If a term doesn't have an exponent , it is considered that the exponent is 1
6y^1×y^1
Multiply the terms with the same base by adding their exponents
6y^1+1
add the numbers
6y²
6y^2+3y×5×
calculate the product
6y²+15y
It's the same thing only different way ok
3y×5
Multiply the numbers
15y
answer: 6y²+15y
PLEASE MARK ME AS BRAINLIEST
Write an expression:
The temperature today was 10 degrees colder then twice(times two) yesterday’s temperature “t”
Answers
Answer: T=10-2 x y
Step-by-step explanation: that is the reason
Dana and Steven read the same book with 60 pages. Dana read 1/4 of the book in 3/10 hour. Steven read 1/5 of the book in 1/6 hour. Which statement is true?
Answers
Answer: Steven read more pages per minute than Dana
Step-by-step explanation:
Find x so that the triangle shown below is a right triangle.
Answers
i think its 7.5
Hopefully this helped
PLEASE HELP I REALLY NEED HELP
Answers
Answer:
Hi I am not sure but I think it is A
a map is drawn using a scale of 1cm/80mi
two cities are 280 miles apart.
how far apart are the cities on the map?
A. 4.5 mi
B. 3.5 cm
C. 3.5 mi
D. 4.5 cm
Answers
Answer:
B) 3.5cm
Step-by-step explanation:
1/80 = n/280
1 * 280 = n * 80
280 = 80n
3.5 = n or n = 3.5
I need help with this
Answers
Answer:
The missing value in the ordered pair is 6.
Step-by-step explanation:
Given that:
The ordered pairs are (-1, 3) and (x,-7)
We have to find the missing value x so that the ordered pairs have a slope -2.
Slope is the steepness of a line which is denoted by m.
Slope =m= -2
Here,
[tex]x_1=-1, y_1=3\\\\x_2=x, y_2=-7[/tex]
Slope is given by;
m = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Putting the given values,
[tex]-2=\frac{-7-3}{x-(-1)}\\-2=\frac{-10}{x+1}\\-2(x+1)=-10\\-2x-2=-10\\-2x=-10-2\\-2x=-12[/tex]
Dividing both sides by -2
[tex]\frac{-2x}{-2}=\frac{-12}{-2}\\x=6[/tex]
Hence,
The missing value in the ordered pair is 6.
please answer this. i’ve asked 3 questions of this same thing bc people don’t even answer them, i’ll give brainliest to whoever answers correctly. i’m failing and really need this answered
1. A wave has a wavelength of 5 m and a frequency of 2 Hz. At what speed/velocity does the
wave travel?
2. The speed/velocity of a wave on a guitar string is 100m/s and the frequency is 1,000 Hz. What
is the wavelength of the wave?
3. If the speed/velocity of a wave is 25 m/s and the wavelength is 5 m, what is the frequency of
this wave?
Answers
We will be using the formula: Speed = Wavelength * Frequency
1. Given: Wavelength = 5 m and Frequency = 2 Hz
Speed of the wave = Wavelength * Frequency
Speed of the wave = 5 * 2
Speed of the wave = 10 m/s
__________________________________________________________
2. Given: Speed of the wave = 100 m/s and Frequency= 1000 Hz
Wavelength = Speed / Frequency
Wavelength = 100 / 1000
Wavelength = 0.1 m
__________________________________________________________
3. Given: Speed of the Wave = 25 m/s Wavelength = 5 m
Frequency = Speed / Wavelength
Frequency = 25 / 5
Frequency = 5 Hz
Can someone plzzzzz help!
Thank u
I will give brainlist!
Answers
Answer:
I think B
Step-by-step explanation:
Identify the property used in each step of solving the inequality 7x+4<46
Answers
Answer:
your answer would be : x<6
Answer:
Step 2) Addition
Step 3) Multiplication
Step-by-step explanation:
Edge 2021
I have a 82.92 in anatomy class but I recieved a 60 percent on an exam.. what will this bring my grade to?
Answers
Answer:
-D
Step-by-step explanation:
Using the paths shown, the distance from Brookfield to Seaside is 20.4 kilometers.
How far is it from Brookfield to Yardley?
Answers
Answer:
7.2 km
Step-by-step explanation:
Distance between Brookfield to Seaside = 20.4 km
Distance between Yardley and Seaside = 13.2 km
Let distance between Brookfield to Yardley be x.
Thus:
x + 13.2 km = 20.4 km
Subtract 13.2 from each side
x = 20.4 - 13.2
x = 7.2
Distance from Brookfield to Yardley is 7.2 km
Need help on algebra b1
b-8 -53
Answers
Feed:
i would recommend you to put the correct statement of the question so people can understand it better but from what i get your trying to ask is that : b-8-53
Step-by-step explanation:
well i dont get what your trying to say or ask
2x^2+3x=(2x-1)(x+1)
Pls do explain
Answers
[tex]x=-\frac{1}{2}[/tex]
Step-by-step explanation:You could solve this problem by either: Factoring or by using the Quadratic Formula.
SOLVING BY FACTORING STEPS
STEP 1: Move (2x−1)(x+1) to the left side of the equation by subtracting it from both sides.
[tex]2x^2+3x-(2x-1)(x+1)=0[/tex]
STEP 2: Simplify 2x^2+3x−(2x−1)(x+1).
[tex]2x+1=0[/tex]
STEP 3: Simplify each term.
[tex]2x^2+3x-2x^2-x+1=0[/tex]
STEP 4: Simplify by adding terms.
[tex]2x+1=0[/tex]
STEP 5: Subtract 1 from both sides of the equation.
[tex]2x=-1[/tex]
STEP 6: Divide each term by 2 and simplify.
[tex]x=-\frac{1}{2}[/tex]
SOLVE BY USING THE QUADRATIC FORMULA STEPS
STEP 1: Move all terms to the left side of the equation and simplify.
[tex]2x+1=0[/tex]
STEP 2: Subtract 1 from both sides of the equation.
[tex]2x=-1[/tex]
STEP 3: Divide each term by 2 and simplify.
[tex]x=-\frac{1}{2}[/tex]
expand and simplify (3c+4)(5+2c)
Answers
Answer:
6c(square)+23c+20
Step-by-step explanation:
15c+6c(square)+20+8c=6c(square)+23c+20
Help now pleaseee
The ratio of blue marbles to red marbles in a bag is 2:3. In the same bag, the ratio of blue marbles to yellow marbles is 1.1. Which of the following statements is true?
There are less yellow marbles than blue marbles
There are less yellow marbles than red marbles
There are less blue marbles that yellow marbles
There are less red marbles than blue marbles
Answers
Answer:
There are less yellow than red
Step-by-step explanation:
2/3 = .6666666 blue to red
1/1 = 1 blue to yellow
Help ASAP Please with this math problem. Just look at the picture.
Answers
[tex] {( \sqrt{9)} }^{2} [/tex]
[tex] ={3}^{2} [/tex]
[tex] = 9[/tex]
[tex] {9}^ \frac{1}{2} [/tex]
[tex] = ({3}^{2} ) ^{ \frac{1}{2} } [/tex]
[tex] = 3 ^{1} [/tex]
[tex] = 3[/tex]
Please answer the question
Answers
7,574 divided 5 if u get it right ur my best friend
Answers
Answer:
Step-by-step explanation:
1514.8 can i get brainlis if correct
Which decimal is equivalent to
11/50
Answers
Answer:
0.22
Step-by-step explanation:
To get 11/50 converted to decimal, you simply divide 11 by 50.