All categories

3 years ago

If a 250-foot #12 copper conductor has a resistance of 0.397 ?, how much is the resistance of the same conductor at 800 feet

Mathematics

1 answer:

Andreas93 [3]3 years ago

8 0

Answer: 1.2704 ohm

Step-by-step explanation:

Since resistance is directly proportional to the length of the conductor.

Let x be the resistance of the same conductor at 800 feet.

Then by direct proportion,

$\frac{x}{800}=\frac{0.397}{250}\\\Rightarrow\ x=\frac{0.397\times800}{250}\\\Rightarrow\ x=1.2704$

hence, the resistance of same conductor at 800 feet = 1.2704 ohm

You might be interested in

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function.

finlep [7]

Answer:

zero ang sagot :)

Step-by-step explanation:

(0×6)×(3.15-8)×(9-5)

0(3.15-8)×(9-5)

4 0

3 years ago

What is 2x plus 5y equals 10

Grace [21]

Answer:

2(5)+5(0)=10

Step-by-step explanation:

There are several ways for this equation to work but a very simple way is shown below.

2*510+5*0=10

10+0=10

10=10

7 0

3 years ago

Unit rate of 14.25 for 3 pounds of deli meat

Neko [114]

To find the unit rate, you have to find how much each pound costs

so 14.25/3 is the expression that will get you the answer

14.25/3= 4.75

4.75 per pound is your answer

hope this helps

6 0

3 years ago

Read 2 more answers

Find the product of 12 and 8. Find the greatest common factor of 12 and 8. Find the least common multiple of 12 and 8. Find the

Fudgin [204]

Answer:

12x8=96, GCF is 4, LCM is 24

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students r

BaLLatris [955]

<h2>Answer with explanation:</h2>

Let p be the population proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Given : Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students receive.

Set hypothesis to test :

$H_0: p=0.39\\\\H_a :p\neq0.39$

Sample size : n= 1055

Sample proportion : $\hat{p}=\dfrac{466}{1055}=0.441706161137\approx0.44$

Critical value for 95% confidence : $z_{\alpha/2}=1.96$

Confidence interval : $\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

$0.44\pm (1.96)\sqrt{\dfrac{0.39(1-0.39)}{1055}}\\\\0.44\pm0.0299536805135\\\\0.44\pm0.03\\\\=(0.44-0.03, 0.44+0.03)\\\\=(0.41,\ 0.47)$

Since , Confidence interval does not contain 0.39.

It means we reject the null hypothesis.

We conclude that 95% confidence interval represents evidence that parents' attitudes toward the quality of education have changed.

8 0

3 years ago