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Natali [406]
2 years ago
13

A metal rod is 25.000cm long at 25.0 degrees Celsius. When heated to 102.0 degrees Celsius, it is 25.054 cm long. What is the co

efficient of linear expansion for this metal?
Mathematics
2 answers:
inn [45]2 years ago
6 0
<span>You may deduce what it represents by analyzing the formula you just wrote.
Well, </span>the coefficient of linear expansion as the fractional change in length per degree of temperature change. 

ΔL = c x L(initial) x ΔT 

where c is the coefficient of linear expansion. You can rewrite the equation to give you c. 

c = ΔL / [L(initial) x ΔT] 

<span>Just substitute the variables and the answer will be
c = 0.000028. </span>

Now, what it represents.It may represent the extent to which the rod expands with temperature when compared to its original length. 
alekssr [168]2 years ago
6 0

α =2.81 E -5 degrees C

or 

α =2.81 x 10^ -5 degrees C

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The total area of the polygon is 176 square feet. Find the value of x.
My name is Ann [436]

Answer:

x = 6 ft

Step-by-step explanation:

Total area of the given polygon = Area of triangle 1 + Area of rectangle 2 + Area of triangle 3

Area of triangle 1 = Area of triangle 3 = \frac{1}{2}(\text{Base})(\text{Height})

                                                              = \frac{1}{2}(x)(8)

                                                              = 4x square feet

Area of rectangle 2 = Length × Width

                                 = 16 × 8

                                 = 128 square feet

Total area of the given polygon = 4x + 128 + 4x

176 = 8x + 128

8x = 176 - 128

x = \frac{48}{8}

x = 6 ft

5 0
2 years ago
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The baker pays $0.80 per pound for sugar and $1.25 per pound for butter. Write an expression that shows how much the baker will
alekssr [168]
X is sugar
y is butter
z is total money

$0.80x + $1.25y = z

the total money spent if the Baker bought 6 pounds of butter and 20 pounds of sugar would be $23.50.
5 0
2 years ago
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A vehicle travels 250 feet every three seconds find the value of the ratio the unit rate and the constant of proportionality how
PSYCHO15rus [73]

to find the unit rate/constant of proportionality , you'd have to dive 250 by three. and they are related because they are the same thing.

8 0
2 years ago
Help me answer this math question please!!
marusya05 [52]
Hope this helps you!

6 0
2 years ago
After triangle ace is dilated by a factor of 5, it has an area of 100 square inches. What was its area before dilation?
NISA [10]

Answer:

20in^2

Step-by-step explanation:

Since you multiply the original area of the triangle by the scale factor to get the new area, you can find the original area (before dilation) by dividing the dilated triangle's area by the scale factor. Since 100 is the area of the dilated triangle, and 5 is your scale factor, you do 100/5 to get the area of the triangle before it was dilated.

5 0
2 years ago
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