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saw5 [17]
2 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]2 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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Ethan has 3/4 of a box of cereal. He gives 1/8 of the box to his little brother and Ethan eats 1/4 of the box, himself. What fra
riadik2000 [5.3K]

Answer:

<em>3/8 of the box cereal</em>

Step-by-step explanation: First you must convert 3/4, 1/8, and 1/4 so they have to same denominator. Four can go into eight two times, so you must multiply the numerator by two. So your new fractions are 6/8, 1/8, and 2/8. Now you must subtract 1/8 and 2/8 from 6/8. When you subtract 1/8 from 6/8 you get 5/8. Now subtract 2/8 from 5/8 and you get <em>3/8. </em>That is how you get the answer, I hope this helps you.


5 0
3 years ago
a right trangle has one angle that measures 70 what is the measure of the other acute angle in the triangle
inna [77]

Answer:

20

Step-by-step explanation:

We know that the interior angle measures of a triangle are <u>180,</u> and we are told that this is a <u>right</u> triangle.

Since we know the measure of two angles, we just have to do basic math:

180=90+70+x

solve for x (which equals 20) to get the measure of your acute angle

3 0
3 years ago
Point A’ is the image of Point A when point A is rotated about the origin B. What angle in the counterclockwise direction is A r
liberstina [14]

Answer:

90 degrees

Step-by-step explanation:

8 0
2 years ago
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AlexFokin [52]

Answer:

x\approx7.8

Step-by-step explanation:

In relation to the given angle, we are given the triangle's opposite side and hypotenuse. Therefore, we use the sine function to set up a proportion and solve for the opposite side:

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sin(23^\circ)=\frac{x}{20}

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x=20sin(23^\circ)

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Therefore, the length of the opposite side is about 7.8 units

3 0
2 years ago
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