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telo118 [61]
2 years ago
8

How many frequencies does a full-duplex qam-64 modem use?

Computers and Technology
2 answers:
Vsevolod [243]2 years ago
8 0

The answer is 2 frequencies.

A Full-Duplex QAM 64 K Modem uses two frequencies. One frequency is used for upstream and the other for downstream. A variety of common QAM forms are available and include, 16 QAM, 32 QAM, 64 QAM, and 256 QAM. For example, for domestic broadcast use, 64 and 256 QAM are used for cable modem and digital cable TV. The modulation scheme for this modem uses both amplitude and phase.

notka56 [123]2 years ago
6 0

A full-duplex qam-64 modem uses 2 frequencies.

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Most ________ are accompanied by several common utility programs, including a search program, a storage management program, and
diamong [38]

Answer:

operating systems

Explanation:

The operating systems is shortly known as OS. It is a system software which manages the software resources of the computer, computer hardware and also provides some common services for the various computer programs.

Most of the operating systems available in the market provides some common utility programs such as the search program, a backup program and a storage management program also.

Some common operating systems are : Linux, Microsoft Windows, Ubuntu, macOS, Unix, and many more.

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2 years ago
Browsers ignore any values specified for the left or top properties under _____ positioning.
blagie [28]

Browsers ignore any values specified for the left or top properties under _____ positioning.

B

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2 years ago
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Define a function compute_gas_volume that returns the volume of a gas given parameters pressure, temperature, and moles. Use
jeyben [28]

Question:

Define a function compute_gas_volume that returns the volume of a gas given parameters pressure, temperature, and moles. Use the gas equation PV = nRT, where P is pressure in Pascals, V is volume in cubic meters, n is number of moles, R is the gas constant 8.3144621 ( J / (mol*K)), and T is temperature in Kelvin.

Answer:

This solution is implemented in C++

double compute_gas_volume(double P, double T, double n){

   double V = 8.3144621 * n * T/P;

   return V;

}

Explanation:

This line defines the function, along with three parameters

double compute_gas_volume(double P, double T, double n){

This calculates the volume

   double V = 8.3144621 * n * T/P;

This returns the calculated volume

   return V;

}

To call the function  from the main, use:

<em>cout<<compute_gas_volume(P,T,n);</em>

<em />

<em>Where P, T and n are double variables and they must have been initialized</em>

5 0
2 years ago
Using Amdahl’s Law, calculate the speedup gain of an application that has a 60 percent parallel component for (a) two processing
Nina [5.8K]

Answer:

a) Speedup gain is 1.428 times.

b) Speedup gain is 1.81 times.

Explanation:

in order to calculate the speedup again of an application that has a 60 percent parallel component using Anklahls Law is speedup which state that:

t=\frac{1 }{(S + (1- S)/N) }

Where S is the portion of the application that must be performed serially, and N is the number of processing cores.

(a) For N = 2 processing cores, and a 60%, then S = 40% or 0.4

Thus, the speedup is:

t = \frac{1}{(0.4 + (1-0.4)/2)} =1428671

Speedup gain is 1.428 times.

(b) For N = 4 processing cores and a 60%, then S = 40% or 0.4

Thus, the speedup is:

t=\frac{1}{(0.4 + (1-0.4)/4)} = 1.8181

Speedup gain is 1.81 times.

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2 years ago
Moore’s Law is said to be more of a trend, rather than a representation of the actual number of transistors on a silicon chip. W
inna [77]

Answer:

Moores Law is defined to be the computer law which defines that the number of transistors on the integrated circuits will double time to time such as in an interval of 2 years. Moore's Law was coined by Intel employee, Gordon Moore.Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. ... Moore's law describes a driving force of technological and social change, productivity, and economic growth.

Explanation:

Moore's Law is named after Intel cofounder Gordon Moore. He observed in 1965 that transistors were shrinking so fast that every year twice as many could fit onto a chip, and in 1975 adjusted the pace to a doubling every two years. ... Intel has suggested silicon transistors can only keep shrinking for another five years.Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. ... Moore's law describes a driving force of technological and social change, productivity, and economic growth.Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. ... Moore's law describes a driving force of technological and social change, productivity, and economic growth. Moore's law is an observation and projection of a historical trend.Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. The observation is named after Gordon Moore, the co-founder of Fairchild Semiconductor and CEO of Intel, whose 1965 paper described a doubling every year in the number of components per integrated circuit,[2] and projected this rate of growth would continue for at least another decade.[3] In 1975,[4] looking forward to the next decade,[5] he revised the forecast to doubling every two years, a compound annual growth rate (CAGR) of 40%.[6][7][8]

The doubling period is often misquoted as 18 months because of a prediction by Moore's colleague, Intel executive David House. In 1975, House noted that Moore's revised law of doubling transistor count every 2 years in turn implied that computer chip performance would roughly double every 18 months (with no increase in power consumption).[9] Moore's law is closely related to MOSFET scaling, also known as Dennard scaling,[10] as the rapid scaling and miniaturization of silicon MOSFETs (metal-oxide-semiconductor field-effect transistors, or MOS transistors)[11][12] is the key driving force behind Moore's law.[10][13]

Moore's prediction proved accurate for several decades and has been used in the semiconductor industry to guide long-term planning and to set targets for research and development (R&D).[14] Advancements in digital electronics are strongly linked to Moore's law: quality-adjusted microprocessor prices,[15] memory capacity (RAM and flash), sensors, and even the number and size of pixels in digital cameras.[16] Digital electronics has contributed to world economic growth in the late twentieth and early twenty-first centuries.[17] Moore's law describes a driving force of technological and social change, productivity, and economic growth.[18][19][20][21]

Moore's law is an observation and projection of a historical trend. It is an empirical relationship and not a physical or natural law. Although the rate held steady from 1975 until around 2012, the rate was faster during the first decade. In general, it is not logically sound to extrapolate from the historical growth rate into the indefinite future. For example, the 2010 update to the International Technology Roadmap for Semiconductors predicted that growth would slow around 2013,[22] and in 2015, Gordon Moore foresaw that the rate of progress would reach saturation: "I see Moore's law dying here in the next decade or so."[23]

Microprocessor architects report that semiconductor advancement has slowed industry-wide since around 2010, below the pace predicted by Moore's law.[24] Brian Krzanich, the former CEO of Intel, announced, "Our cadence today is closer to two and a half years than two."[25] Intel stated in 2015 that improvements in device have slowed, starting at the 22 nm feature width around 2012, and continuing at 14 nm.[26] Krzanich cited Moore's 1975 revision as a precedent for the current deceleration, which results from technical challenges and is "a natural part of the history of Moore's law".[27][28][29] Leading semiconductor manufacturers, TSMC and Samsung Electronics, have the 10 nm and 7 nm nodes in

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2 years ago
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