How many times has the ITU-R revised the CCIR 601 international standard? A. four B. five C. six D. seven

Answer:

Inside the Sun.

Explanation:

Inside the Sun, this process begins with protons (which is simply a lone hydrogen nucleus) and through a series of steps, these protons fuse together and are turned into helium. This fusion process occurs inside the core of the Sun, and the transformation results in a release of energy that keeps the sun hot.

Let f(z) = (4z ² + 2z) / (2z ² - 3z + 1).

First, carry out the division:

f(z) = 2 + (8z - 2) / (2z ² - 3z + 1)

Observe that

2z ² - 3z + 1 = (2z - 1) (z - 1)

so you can separate the rational part of f(z) into partial fractions. We have

(8z - 2) / (2z ² - 3z + 1) = a / (2z - 1) + b / (z - 1)

8z - 2 = a (z - 1) + b (2z - 1)

8z - 2 = (a + 2b) z - (a + b)

so that a + 2b = 8 and a + b = 2, yielding a = -4 and b = 6.

So we have

f(z) = 2 - 4 / (2z - 1) + 6 / (z - 1)

or

f(z) = 2 - (2/z) (1 / (1 - 1/(2z))) + (6/z) (1 / (1 - 1/z))

Recall that for |z| < 1, we have

[tex]\displaystyle\frac1{1-z}=\sum_{n=0}^\infty z^n[/tex]

Replace z with 1/z to get

[tex]\displaystyle\frac1{1-\frac1z}=\sum_{n=0}^\infty z^{-n}[/tex]

so that by substitution, we can write

[tex]\displaystyle f(z) = 2 - \frac2z \sum_{n=0}^\infty (2z)^{-n} + \frac6z \sum_{n=0}^\infty z^{-n}[/tex]

Now condense f(z) into one series:

[tex]\displaystyle f(z) = 2 - \sum_{n=0}^\infty 2^{-n+1} z^{-(n+1)} + 6 \sum_{n=0}^\infty z^{-n-1}[/tex]

[tex]\displaystyle f(z) = 2 - \sum_{n=0}^\infty \left(6+2^{-n+1}\right) z^{-(n+1)}[/tex]

[tex]\displaystyle f(z) = 2 - \sum_{n=1}^\infty \left(6+2^{-(n-1)+1}\right) z^{-n}[/tex]

[tex]\displaystyle f(z) = 2 - \sum_{n=1}^\infty \left(6+2^{2-n}\right) z^{-n}[/tex]

So, the inverse Z transform of f(z) is [tex]\boxed{6+2^{2-n}}[/tex].

can you give more of an explanation to what the product need sti be

Answer:

Ceramic coating offers good protection to the car's surface. The nano-coating can protect the car from most scratches, dirt and chemical contaminants. Ceramic coating also doesn't have any side-effects to the original paint. Ceramic coating also lasts longer than regular paint.

Answer:

by placing one of the two measurements below the other or by separating them with a stroke

Explanation:

I had a test on this and it was correct

Answer:

Answer:

Sustainability and durability

Explanation:

Answer:

enables the representation, analysis and communication of various aspects of an information system. These aspects correspond to varying and incomplete views of information systems and the processes therein.

Answer:

True.

Explanation:

Answer: $597015

Explanation:

Let the salary of the starter be x.

Since Jamal earns $400,000 and makes 67% of what starters make, then this can be written mathematically as:

67% of x = $400000

67% × x = $400,000

67/100 × x = $400,000

0.67 × x = $400,000

0.67x = $400,000

x = $400,000 / 0.67

x = $597014.93

x = $597015

His next salary will be $597015

Answer:

Economic considerations must be considered when designing a model.

Explanation:

The engineers wanted to use a specially formulated glass which was lighter than ordinary glass for the design requirement of light weight and portability with helicopter. However the cost was very high than the budgeted amount for the material to be used in the project. The alternative was to use a plastic wind shield. In design perspective considering the weight and portability criteria, this will still work .In the economic perspective, the budget will fit. This concludes that economic considerations must be considered when designing a model. Though this factor might not be the most important one , but it helps in ensuring projects budgets are within expected margins.

Answer:

"The client will use the information gathered from the original design and modify the vehicle."

Explanation:

Answer:

Sprockets.

Explanation:

A chain drive is an efficient technique used for the transmission of mechanical power from one point to another. For example, it is used for transmitting power to the wheels of a bicycle, motorcycle, motor vehicle and other machineries such as chain saw etc.

Chain drive ratio is the ratio between the rotational speeds of the input and output sprockets of a roller chain drive system. This ultimately implies that, chain drive ratio is the ratio of the number of teeth on the driving sprocket (T1) divided to the number of teeth on the driven sprocket (T2).

Also, the chain drive ratio can be calculated by dividing the number of teeth on the large sprocket by the number of teeth on the small sprocket.

Additionally, the rotational speed of a sprocket is measured in revolutions per minute (RPM).

One of the issues with the roller chain is that, as the roller chain moves round the sprocket link by link, it affects its speed (surge) due to the change in acceleration and deceleration i.e the rise and fall of its pitch line.