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kondor19780726 [428]
3 years ago
5

The underwriters laboratories (ul) requirement for ? ground-fault circuit interrupters (gfcis) is that tripping shall occur when

the continuous 60-hertz differential current exceeds six milliamperes, but it shall not trip at less than four milliamperes.
Computers and Technology
1 answer:
Nadusha1986 [10]3 years ago
4 0
The answer is Class A.  The GFCI (Ground Fault Circuit Interrupter) will “sense” the difference in the amount of electricity flowing into the circuit to that flowing out, even in amounts of current as small as 4 or 5 milliamps. The GFCI reacts quickly (less than one-tenth of a second) to trip or shut off the circuit. 
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What is the output of this program ? Assume the user enters 3,6 and 11​
Nostrana [21]

Answer:

C++

Explanation:

C++ Standards

C++ is standardized as ISO/IEC 14882. Currently, there are two versions:

C++98 (ISO/IEC 14882:1998): First standard version of C++.

C++03 (ISO/IEC 14882:2003): minor "bug-fix" to C++98 with no change to the language. Commonly refer to as C++98/C++03 or First C++ standard.

C++11 (ISO/IEC 14882:2011): Second standard version of C++. Informally called C++0x, as it was expected to finalize in 200x but was not released until 2011. It adds some new features to the language; more significantly, it greatly extends the C++ standard library and standard template library (STL).

C++14: Infomally called C++1y, is a small extension to C++11, with bug fixes and small improvement.

C++17: informally called C++1z.

C++2a: the next planned standard in 2020.

C++ Features

C++ is C. C++ supports (almost) all the features of C. Like C, C++ allows programmers to manage the memory directly, so as to develop efficient programs.

C++ is OO. C++ enhances the procedural-oriented C language with the object-oriented extension. The OO extension facilitates design, reuse and maintenance for complex software.

Template C++. C++ introduces generic programming, via the so-called template. You can apply the same algorithm to different data types.

STL. C++ provides a huge set of reusable standard libraries, in particular, the Standard Template Library (STL).

C++ Strength and Pitfall

C++ is a powerful language for high-performance applications, including writing operating systems and their subsystems, games and animation. C++ is also a complex and difficult programming language, which is really not meant for dummies. For example, to effectively use the C++ Standard Template Library (STL), you need to understand these difficult concepts: pointers, references, operator overloading and template, on top of the object-oriented programming concepts such as classes and objects, inheritance and polymorphism; and the traditional constructs such as decision and loop. C++ is performance centric. The C++ compiler does not issue warning/error message for many obvious programming mistakes, undefined and unspecified behaviors, such as array index out of range, using an uninitialized variable, etc, due to the focus on performance and efficiency rather than the ease of use - it assumes that those who choose to program in C++ are not dummies.

6 0
3 years ago
Why are user manuals important? Select all that apply.
Oksi-84 [34.3K]

Answer:

I. User manuals contain text and images to describe how to use the program features.

II. User manuals explain the commands and syntax of programming languages.

III. User manuals often include chapter on problems and their resolutions.

Explanation:

A user manual can be defined as a clear, detailed and an informative guide drafted by the manufacturer (producer) of a product or service, which is to be given to a customer (end user) so as to help them know and understand how to use the product or service properly.

User manuals are important because they contain the following necessary informations;

I. User manuals contain text and images to describe how to use the program features.

II. User manuals explain the commands and syntax of programming languages.

III. User manuals often include chapter on problems and their resolutions.

Additionally, a user manual contains information on the safety precautions that are to be taken by the end user while using a product or service.

4 0
3 years ago
What would you enter at the command prompt to start a new bourne again shell session?
butalik [34]

The answer is bash . The bash command opens a Bourne-again sheel (bash) session. It is the standard shell used in most Linux computers and it uses commands similar to a UNIX shell. Bash includes features such as:

1) Command completion when pressing the tab key.

2) Command history.

3) Improved arithmetic functions.

6 0
3 years ago
Which option will enable Mina to apply several formats to the spreadsheet cells at the same time?
madam [21]
Applying a cell style will enable Mina to apply several formats to the spreadsheet cells at the same time.  <span>To apply several formats in one step, and to make sure that cells have consistent formatting, you can use a cell style. A cell style is a defined set of formatting characteristics, such as fonts and font sizes, number formats, cell borders, and cell shading. </span>
4 0
4 years ago
A credit card company receives numerous phone calls throughout the day from customers reporting fraud and billing disputes. Most
Veronika [31]

Answer:

3.59 minutes

Explanation:

We solve this question using z score formula

Using Excel

Z-SCORE= (DataPoint-AVERAGE(DataSet))/STDEV(DataSet)

IN EXCEL,

AVERAGE, an excel function that calculates the Average of data set

STDEV.S: calculates the standard deviation while treating the data as a ‘sample’ of a population.

STDEV.P: This function calculates the standard deviation while treating the data as the entire population.

Z score formula = x - μ/σ

x = ?? μ = 2.5 minutes σ = 0.5 minutes

We are asked : If 1.5% of the callers are put on hold for longer than x minutes, what is the value of x?

Hence, Longer than = Greater than =

100 - 1.5%

= 100 - 0.015

= 0.985 ( 98.5%)

Using Excel we calculate = z score for 98.5 percentile

= 2.1701

Z score = x - μ/σ

2.1701 = x - 2.5/0.5

2.1701 × 0.5 = x - 2.5

1.08505 = x - 2.5

x = 1.08505 + 2.5

x = 3.58505

Approximately to 2 decimal places = 3.59 minutes

Therefore, 1.5% of the callers are put on hold for longer than 3.59 minutes.

8 0
3 years ago
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