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3 years ago

Calculate the current in a circuit whose electromotive force is 100 volts and resistance is 5 Ohms. Use the formula i = e/r.

2 answers:

7 0

Answer:
I = 20 amperes

Explanation:
The relation between current, voltage and resistance can be expressed using Ohm's law as follows:
V = I*R
where:
V is the volt = 100 volts
I is the current we want to calculate
R is the resistance = 5 Ohm

Substitute with the givens in the above relation to get the current as follows:
V = I*R
I = v/r
I = 100/5
I = 20 amperes

Hope this helps :)

morpeh [17]3 years ago

6 0

I=20 amps.
By the way, did you know that this is Ohm's Law?

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June served 4/9 of 18 liters of fruit punch. How many liters does she have left?

victus00 [196]

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3 years ago

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The time for a professor to grade an exam is normally distributed with a mean of 16.3 minutes and a standard deviation of 4.2 mi

dem82 [27]

Answer:

62.17% probability that a randomly selected exam will require more than 15 minutes to grade

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 16.3, \sigma = 4.2$

What is the probability that a randomly selected exam will require more than 15 minutes to grade

This is 1 subtracted by the pvalue of Z when X = 15. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{15 - 16.3}{4.2}$

$Z = -0.31$

$Z = -0.31$ has a pvalue of 0.3783.

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3 years ago

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jeka57 [31]

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2 years ago

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Most of the information's are already given in the question. It is important to understand the language of the problem for solving the problem. Once the language is understood, then solving the problem is easy.
Let us assume the number of black jelly beans = x
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Then from the question we can get to a equation.
3x - 7 = y
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x + y = 225
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2 years ago

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