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2 years ago

Alternating Current or AC is better for use in ___, while DC direct current is needed in _ .

Computers and Technology

2 answers:

PIT_PIT [208]2 years ago

6 0

C electric power transmisson and electronics

Dennis_Churaev [7]2 years ago

3 0

Answer: Electric power transmission, Electronics.

Explanation:

First we need to define what is AC and DC.

AC is basically a current that reverses or changes direction, while a DC is one that follows a specific pattern i.e one directional.

From the question on which is better suited for AC and DC,

For AC, electric power transmission is considered because of its efficiency for transmitting power over long distances and cause of it ability to be produce high voltage by transformer which is more efficient.

Also DC is considered for Electronics because of reasons like:

- accuracy and ease at which we can control it

- most modern electronic devices uses batteries, and we know batteries can't store Ac, but rather it stores DC

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A method a. may have zero or more parameters b. never has parameter variables c. must have at least two parameter variables d. m

Lynna [10]

Answer:

The answer is "Option a"

Explanation:

A method is a technique, that associated with both a message and an object. It includes information, behavior, and actions of an interface defining, how the object can be used, and wrong choices can be described as follows:

In option b, It includes parameters in the method.
In option c, It contains a parameter, that may be one or more.
In option d, It contains one parameter also.

5 0

3 years ago

A computer retail store has 15 personal computers in stock. A buyer wants to purchase 3 of them. Unknown to either the retail st

Dima020 [189]

Answer:

a. 1365 ways

b. Probability = 0.4096

c. Probability = 0.5904

Explanation:

Given

PCs = 15

Purchase = 3

Solving (a): Ways to select 4 computers out of 15, we make use of Combination formula as follows;

$^nC_r = \frac{n!}{(n-r)!r!}$

Where $n = 15\ and\ r = 4$

$^{15}C_4 = \frac{15!}{(15-4)!4!}$

$^{15}C_4 = \frac{15!}{11!4!}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12 * 11!}{11! * 4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{15 * 14 * 13 * 12}{4 * 3 * 2 * 1}$

$^{15}C_4 = \frac{32760}{24}$

$^{15}C_4 = 1365$

Hence, there are 1365 ways 

Solving (b): The probability that exactly 1 will be defective (from the selected 4)

First, we calculate the probability of a PC being defective (p) and probability of a PC not being defective (q)

From the given parameters; 3 out of 15 is detective;

So;

$p = 3/15$

$p = 0.2$

$q = 1 - p$

$q = 1 - 0.2$

$q = 0.8$

Solving further using binomial;

$(p + q)^n = p^n + ^nC_1p^{n-1}q + ^nC_2p^{n-2}q^2 + .....+q^n$

Where n = 4

For the probability that exactly 1 out of 4 will be defective, we make use of

$Probability = ^nC_3pq^3$

Substitute 4 for n, 0.2 for p and 0.8 for q

$Probability = ^4C_3 * 0.2 * 0.8^3$

$Probability = \frac{4!}{3!1!} * 0.2 * 0.8^3$

$Probability = 4 * 0.2 * 0.8^3$

$Probability = 0.4096$

Solving (c): Probability that at least one is defective;

In probability, opposite probability sums to 1;

Hence;

Probability that at least one is defective + Probability that at none is defective = 1

Probability that none is defective is calculated as thus;

$Probability = q^n$

Substitute 4 for n and 0.8 for q

$Probability = 0.8^4$

$Probability = 0.4096$

Substitute 0.4096 for Probability that at none is defective

Probability that at least one is defective + 0.4096= 1

Collect Like Terms

Probability = 1 - 0.4096

Probability = 0.5904

8 0

2 years ago

A pointing device uses light to determine hand motion.

kirill [66]

The answer to this is Optical mouse.

The reason the answer is optical mouse is because the optical mouse is a computer mouse which uses a light source, typically a light-emitting diode, and a light detector, such as an array of photodiodes, to detect movement relative to a surface.

Hope this helped :)
have a great day

3 0

2 years ago

How do I turn of the noise canceling feature on my beats studio wireless?

zysi [14]

You press and hold the "b" button on your left earmuff, but you have to hold it down as long as you want ANC (Automatic Noise Cancelling) to be turned off, in other words, as soon as you release the button, ANC will be turned back on. Unfortunately, this will also mute your music.

5 0

3 years ago

"in troubleshooting a boot problem, what is the advantage of restoring all uefi/bios settings to their default values?"

Alex17521 [72]

When this case would appear, one thing that I would do personally would first, go to the settings, in then, after having this done, I would then "scroll down" to where ti would say "restore (uefi/bios) files, and from there, you would get every value that would would have from the beginning in your chip.

And also, what is truly unique would be the fact that you would be able to choose the "restore point" that you would like for it to appear.

3 0

2 years ago

Alternating Current or AC is better for use in ___________, while DC direct current is needed in _________ .

Alternating Current or AC is better for use in ___, while DC direct current is needed in _ .