Answer:
La variación de calor por unidad de tiempo es 4285.714 watts, es decir, joules por segundo.
Step-by-step explanation:
Asumamos que la transferencia de calor es enteramente por conducción, en estado estable y unidimensional´y que la ventana es representada por una placa plana. Bajo estas consideraciones, la ecuación de conducción es la siguiente:
[tex]\dot Q = \frac{k\cdot w\cdot h}{l}\cdot (T_{i}-T_{o})[/tex] (1)
Donde:
[tex]\dot Q[/tex] - Tasa de transferencia de calor, medida en watts.
[tex]k[/tex] - Conductividad térmica, medida en watts por metro-grado Celsius.
[tex]w[/tex] - Ancho de la ventana de vidrio, medido en metros.
[tex]h[/tex] - Altura de la ventana de vidrio, medida en metros.
[tex]l[/tex] - Espesor de la ventana de vidrio, medida en metros.
[tex]T_{i}[/tex] - Temperatura interior del vidrio, medida en grados Celsius.
[tex]T_{o}[/tex] - Temperatura exterior del vidrio, medida en grados Celsius.
Si conocemos que [tex]k = 0.8\,\frac{W}{m\cdot ^{\circ}C}[/tex], [tex]w = 2.5\,m[/tex], [tex]h = 1.5\,m[/tex], [tex]l = 2.8\times 10^{-3}\,m[/tex], [tex]T_{o} = 16\,^{\circ}C[/tex] y [tex]T_{i} = 20\,^{\circ}C[/tex], entonces la tasa de transferencia de calor es:
[tex]\dot Q = \left[\frac{\left(0.8\,\frac{W}{m\cdot ^{\circ}C} \right)\cdot (2.5\,m)\cdot (1.5\,m)}{2.8\times 10^{-3}\,m} \right]\cdot (20\,^{\circ}C-16\,^{\circ}C)[/tex]
[tex]\dot Q = 4285.714\,W[/tex]
La variación de calor por unidad de tiempo es 4285.714 watts, es decir, joules por segundo.
here is an easy question for points ♥
look at the image linked below
Answer:
x∧8 have a nice day
Step-by-step explanation:
to prove ∆LMN ≅ ∆PQR by SSS you need _______________ and
______________ and ______________
Given:
To prove ∆LMN ≅ ∆PQR by SSS you need _____________ and
_______________ and ______________.
To find:
The missing values.
Solution:
If ∆LMN ≅ ∆PQR by SSS, then all sides of ∆LMN are congruent to corresponding sides of ∆PQR.
[tex]LM\cong PQ[/tex]
[tex]MN\cong QR[/tex]
[tex]LN\cong PR[/tex]
Therefore, the missing values are [tex]LM\cong PQ, MN\cong QR,LN\cong PR[/tex].
A student saves $30 per month. How much is saved in 4 months?(PLz help)
Answer:
$120
Step-by-step explanation:
30 x 4 is 120 (think of it as 3 x 4 then add the 0 at the end)
Step-by-step explanation:
it so easy bro
$30*4=$120
The slope of the graphed line is
the rise is 5 and the run is 2 so the answer is 5/2
work out the angle of size x
Answer:
x=75
Step-by-step explanation:
[tex]We\ are\ given\ that, \\Angle GFE=105\\We\ observe\ that, \\Angle\ GFE\ and Angle\ EFB\ form\ a\ linear\ pair\ and\ hence,\ are\ supplementary.\\Hence,\\Angle\ GFE\ + Angle\ EFB=180\\Hence,\\105+Angle\ EFB=180\\Angle\ EFB=180-105\\Angle\ EFB=75\\We\ know\ observe\ that\ Angle\ EFB\ and\ Angle\ ABC\ are\ corresponding\ angles\ and\ are\ equal\\Hence,\\Angle\ EFB\ = \ Angle\ ABC\\75=Angle\ ABC\\75=x\\x=75[/tex]
f(x) = –22 + 10x - 6
Find f(-5)
Answer:
Step-by-step explanation:
-31
Answer:
-31
Step-by-step explanation:
just enter -5 into x and solve
PLEASE HELP!!
What is the equation of the line in slope-intercept form?
Answer:
y=3/5x+3
Step-by-step explanation:
The first blank is the slope. To find the slope, you first get 2 points on the graph. I chose (-5,0) and (0,3). You then find the difference in the Y values, which is positive 3, and find the difference in the X values, which is 5. Slope is y/x, so the slope would be 3/5. The second blank is the y-intercept, which is where the line meets the y value with an x value of 0. The y-intercept would be 3.
Please Help Me This Is Due Today
Answer:
1.Y 2.AC 3.R
Step-by-step explanation:
1. Y is a point.
2. AC is a line segment
3. The name of the plane is R
A soccer field measures 90 meters wide by 120 meters long starting together in one corner you walk the diagonal to the opposite corner while your friend walks the length and with to get the same corner how much further dose your friend walk
Answer:
The friend walks 60 m further than the other person
Step-by-step explanation:
Given the dimensions of the soccer field:
Width = 90 m
Length = 120 m
One person walks along its diagonal.
As the length and width of the field are perpendicular, Diagonal can be calculated using Pythagorean Theorem:
[tex]Diagonal ^2 =Length^2+Width^2[/tex]
[tex]Diagonal ^2 =90^2+120^2\\\Rightarrow Diagonal ^2 =8100+14400\\\Rightarrow Diagonal ^2 =22500\\\Rightarrow Diagonal =150\ m[/tex]
So, the distance walked by the person along the diagonal = 150 m
Distance walked by the person's friend to reach the opposite point = Width + Length = 120 + 90 = 210 m
So, the difference of the two distances will give us the distance that was walked further by the friend.
The difference is = 150 - 90 = 60 m
So, the friend walks 60 m further than the other person.
Which are necessary conditions to apply the SAS Triangle Congruence Theorem? Select all that apply.
A. Two sides and the included angle of a triangle are congruent to the corresponding parts of another triangle.
B. Two angles and the included side of one triangle are congruent to the corresponding parts of another triangle.
C. An angle and the two sides collinear with the angle's rays are congruent to the corresponding parts of another triangle.
D. Two sides and any angle of one triangle are congruent to the corresponding parts of another triangle.
Answer:
A and C
Step-by-step explanation:
Two sides and the included angle of a triangle are congruent to the corresponding parts of another triangle.
An angle and the two sides collinear with the angle's rays are congruent to the corresponding parts of another triangle.
The statements that will apply that meets the conditions for two triangles to be considered congruent to each other by the SAS Congruence Theorem are:
A. corresponding two sides and an included angle that are congruent in both triangles
C. A pair of two sides that are collinear to an angle's ray and an angle, which are congruent to the corresponding two sides and angle in the other triangle.
Recall:
SAS Triangle Congruence Theorem states that if two triangles have a pair of corresponding two sides and an included angle that are congruent to each other, then the two triangles are considered congruent to each other.The image shows two triangles that are congruent by the SAS Congruence Theorem.Therefore the statements that will apply that meets the conditions for two triangles to be considered congruent to each other by the SAS Congruence Theorem are:
A. corresponding two sides and an included angle that are congruent in both triangles
C. A pair of two sides that are collinear to an angle's ray and an angle, which are congruent to the corresponding two sides and angle in the other triangle.
Learn more here:
https://brainly.com/question/19807547
Complete the statement using or =.
B) 16/11 ____ 1.45….
Answer:
greater than sign (>)
Step-by-step explanation:
1.45 can be rewritten as a fraction (1 and 1/20). 16/11 can be rewritten as 1 and 5/11. The greater the denominator, the smaller the number. So, with the previous sentence in mind, 16/11 (1 and 5/11) is greater than 1.45 (1 and 1/20).
Consider function g. Which function could be the inverse of function g? PLEASE HELP !
Answer:
Step-by-step explanation:
The correct answer is B .
April surveyed 200 bicyclists riding on the Two Rivers Bridge and recorded the
helmet color and brand of bicycle (name-brand or generic) the cyclist was riding
Of the 80 cyclists riding name-brand bikes, 60 had black helmets. If helmet
color and brand of bicycle are independent, how many cyclists riding generic
bicycles would be expected to have black helmets?
A. 5
B. 20
C. 30
D. 90
E. 100
what must be included in a algebraic expression?
Answer:
Variable (or coefficients)
Step-by-step explanation:
Answer:
you have to be more specific but, There is no official antonym for algebraic expression. The only thing that is the opposite of an algebraic expression is something that is not an algebraic expression.
Step-by-step explanation:
☜(ﾟヮﾟ☜)
the lacrosse team is raising money by selling cheesecakes. the players plan to sell an entire cheesecake for $24
Answer:
what is the rest of the question
Step-by-step explanation:
then i can help you answer it.
BRAINLIEST AND 50 POINTS FOR THE ACTUAL RESPONSIBLE ANSWERS
Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting two slanting rods, one of which, labeled PR, is shown:
A support structure is shown in which a right triangle PQR is formed with the right angle at Q.
Part A: What is the approximate length of rod PR? Round your answer to the nearest hundredth. Explain how you found your answer, stating the theorem you used. Show all your work. (5 points)
Part B: The length of rod PR is adjusted to 17 feet. If width PQ remains the same, what is the approximate new height QR of the scaffold? Round your answer to the nearest hundredth. Show all your work. (5 points)
Answer:
Part A: 2 * sqrt(65) ft, or about 16.12451549... ft
Part B: sqrt(93) ft, or about 9.64365076... ft
Step-by-step explanation:
Part A: A right triangle is formed, so we can use the Pythagoren theorem to solve for the length of rod PR. The Pythagoren theorem is a^2 + b^2 = c^2, with PR being c^2, and PQ and QR being a^2 and b^2 (interchangeably). So, we plug in the lengths and get the equation 14^2 + 8^2 = c^2. This is equal to 144 + 64 = c^2. Simplified, we have 208 = c^2. Getting the square root of both sides, we find that c is equal to approximately 16.12451549... feet.
Part B: Now we are solving for a side length rather than the hypotenuse. We can use the Pythagorean theorem here too. We have: a^2 + 14^2 = 17^2. We solve and get a^2 + 144 = 289. Simplified, a^2 = 145. The square root of 145 is approximately 9.64365076... feet, our answer.
I would appreciate brainliest, have an amazing day!
What is the volume of this prism?
Water is filling a pool at a rate of 5 gallons per minutes. Write equivalent ratios for the first 5 minutes of the pool filing up. *
Time
1 2 3 4 5
___________________________________________
5 10 15 20 25
Amount of water
Mathematics I need help
Answer:
The answer is b
Step-by-step explanation:
0.63-0.2=0.43
HELP ASAP 45 POINTS!!!!
1
Write in slope-intercept form an equation of the line that passes through the points (−5,3) and (7,−9).
The equation is y=
2
Find the distance between (0, −9) and (9, −8). Write your answer using a radical sign.
d=
1
Write in slope-intercept form an equation of the line that passes through the points (−5,3) and (7,−9).
The equation is y=
Answer:
D = -4,5
Step-by-step explanation:
I took the test on k12
find an equation which may be left factored for a polynomial function with given degree and zeros. Degree 4, with 0, -3, and 4 as zeros.
I need this answered as soon as possible, please.
Answer:
В РУССЕЙН
Step-by-step explanation:
В РУССЕЙНВ РУССЕЙ
Для Русскихъ: Дорогие братья и сестры! Данный канал посвящаю нашей с вами русской ку
Для Русскихъ: Дорогие братья и сестры! Данный канал посвящаю нашей с вами русской культуры. Ролике на моем
Answer:
Step-by-step explanation:
40 x 0-3 -0000
easy
Scooter travels 30 feet into seconds at a contest speed
Answer:
Step-by-step explanation:
A.15 FEET PER SEC
Answer:
A=15 1sec=15 3sec=45 4sec=60 5sec=75
Step-by-step explanation:
IF he travels 30 feet in 2 seconds, then 30/2=15 so the answer is 15
Question 2 of 10
w
What do you know to be true about the values of p and q?
9
60°
1459
45°
A. p> a
B. p
O c. p= 9
D. Can't be determined
The value of p is equal to q from the given triangles
Sum of interior angle of a triangleThe sum of interior angle of a triangls is 180 degrees
For the first triangle
p + 60 + 30 = 180
p + 90 = 180
p = 180 - 90
p = 90 degrees
For the second triangle
q + 45 + 45 = 180
q + 90 = 180
q = 90degree
From both results, you can see that the value of p is equal to q
Learn more on triangles here: https://brainly.com/question/17335144
#SPJ1
A pumpkin is thrown out of a window that is 4 feet high with an upward velocity of 14. When will the pumpkin hit
the ground?
A. 0.4 seconds
OB. 1.1 seconds
O c. 7 seconds
OD. 0.22 seconds
Answer:
Step-by-step explanation:
Given
Height H = 4 feet
Velocity = 14ft/s
Required
Time the pumpkin will hit the ground
Using the equation of mottion
H = ut + 1/2gt²
4 = 14t + 1/2(9.8)t²
4 = 14t + 4.9t²
4.9t²+14t-4 = 0
t = -14±√196+16(4.9)/2(4.9)
t = -14±√196+78.4/2(4.9)
t = -14±16.57/9.8
t = -14+16.57/9.8
t = 2.57/9.8
t = 0.2seconds
helpppppppppppppppppppppppp for brainliest
I dont know how to solve this does anybody?
Answer:
3x + 7 + 5
Step-by-step explanation:
I could be wrong... there are 3 x's so that would be 3x, and then the 7 and 5. sorry if i'm wrong
WILL GIVE BRAINLIEST
Which of the following statements represents a mathematical expression?
A. The difference of 17 and 9.
B. The product of 8 and 7 is 56.
C. Seven to the second power is equal to 49.
D. Two plus 4 has the same value as 4 plus 2
Answer:
a the difference of 17 and 9
Answer:
A.
Step-by-step explanation:
Because there is a difference between a expression and equation. Expressions don’t have a equal sign or an answer. But equations have an equal sign and an answer. So because everything else has an answer or equal sign, the correct answer would be A.
There were 12 stray cats in a town the first year. The next year, there were 21 stray cats in the town. What is the percent increase?
Answer: 75% increase
Step-by-step explanation:
Percentage Increase=(Final Value−Starting Value/Starting Value)×100
Percentage Increase=(21-12/12) ×100
Percentage Increase=(9/12) ×100
Percentage Increase=0.75 ×100
Percentage Increase=75%
Answer:
75 percent
Step-by-step explanation:
21-12=9
9=x%*12
/ /
12 12
3/4 = x
0.75 =x
75% = x
7. In the table of values below, y represents the number of hot dogs that Snidely Snodgrass
ate in the National Coney Island Hot Dog Contest, and x represents the number of minutes.
X Minutes
Y Hot Dogs
0
0
28
8
50
Based on the information in the table, what is the constant of proportionality, k, for this
situation 2
A
84
B
7
72
D
12
A
Answer:
a direct proportionality constant (k) is calculated by dividing any quantity of the 2nd magnitude by the corresponding quantity of the 1st.
Step-by-step explanation:
K = y/x
PLS HELP I WILL GIVE BRAINLIEST
Answer:
See below for answers
Step-by-step explanation:
12/15=4/5
8/10=4/5
18/27=2/3
6/9=2/3
8/12=2/3
12/18=2/3
9/15=3/5
10/25=2/5
Answer:
4/5, 4/5, 2/3, 2/3, 2/3, 2/3, 3/5, 2/5
Step-by-step explanation:
