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saw5 [17]
3 years ago
8

For a wall of a given material and of a fixed surface area, the rate of heat loss by conduction through the wall is inversely pr

oportional to the thickness (T) of the wall, and directly proportional to the temperature difference (d) across the wall. The rate of heat loss could be given by which of the following expressions?
A. 2d/T
B. 2 T/d
C. 2d + ½ T
D. 2(d + ½ T)
E. T/d
Mathematics
1 answer:
asambeis [7]3 years ago
6 0
The answer is        A .2d/T
Since d is directly proportional to the heat lost it should be the numerator
since T is inversely proportional to the heat lost it shoudl be the denormirator
 that is      1/T ;         2 is the constant
the actual formula is        R = kd/T
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A survey of 347 high school students asked students to describe their
vampirchik [111]

Answer:

Step-by-step explanation:

Conditional relative frequency is a frequency that is obtained in fraction that tells you what particular group has a particular feature.

In the questions above

Total number of high school students = 347

We have 3 groups based on their political tendencies

Liberal

Total number of Liberal students: 95

Total number of male Liberal Students = 27

Total number of female Liberal student = 95 - 27 = 68

Moderate

Total number of moderate students: 128

Total number of female moderate Students = 91

Total number of male moderate students is calculated as = 128 - 91

= 37

Conservative

Total number of conservative students: is not given in the question.

This is calculated as Total number of High school student - ( Total number of Liberal students + Total number of Moderate students)

347- (95+128) = 347- 223

= 124

Total number of female conservative Students= 93

Total number of male conservative students was not given in the question. Therefore it is calculated as = 124 -93 = 31

To determine the conditional relative frequency of males = Total number of high school male students in the school ÷ Total number of high school students in the school

Total number of male high school students is calculated as = Number of male Liberal students + Number of male Moderate students + Number of male Conservative students.

= 27 + 37 + 31

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3 0
3 years ago
Solve this system equation y=4x+2, x=3
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Answer:

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Step-by-step explanation:

Put the x value where it belongs

y=4(3)+2    Now do the math ( id.k what to say here for the problem other than that lol)

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3 0
3 years ago
Read 2 more answers
In the accompanying diagram,
shepuryov [24]

^congruence concept^

ok. i already answer it

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3 years ago
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