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dolphi86 [110]
3 years ago
10

If most wildfires are suppressed (all fires are put out) for many years, how does the risk of wildfire in the area change in the

future?
There will be a higher risk of wildfires
There will be a lower risk of wildfires
There is no difference in risk

Explain your answer.
Engineering
1 answer:
Serjik [45]3 years ago
5 0

Answer:

there is no difference in risk

Explanation:

even though they put out the fires, if they don't get rid of the source from which the wildfires comes from then wildfires wont stop coming

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A 75 ohm coaxial transmission line has a length of 2.0 cm and is terminated with a load impedance of 37.5 + j75 Ohm. If the diel
Hatshy [7]

Answer:

The load reflection coefficient, \Gamma =0.62\angle 82.875^{\circ} \Omega

Reflection coefficient at input,  \Gamma = 0.62\angle - 147.518^{\circ} \Omega

SWR = 4.26

Given:

Characteristic impedance of the co-axial cable, Z_{c} = 75 \Omega

Length of the cable, L = 2.0 cm = 0.02 m

Z_{Load} = 37.5 + j75 \Omega

Dielectric constant, K = 2.56

frequency, f = 3.0 GHz = 3.0 \times 10^{9} Hz

Explanation:

In order to calculate the reflection coefficient at load, we first calculate these:

The line input impedance Z_{i} is given by:

Z_{i} = Z_{c}\frac{Z_{Load} + jZ_{c} tan(\beta L)}{Z_{c} + jZ_{Load} tan (\beat L)}                     (1)

Now, we calculate the value of \beta:

\beta = \frac{2\pi}{\lambda'} = \farc{2\pi f\sqrt{K}}{c}

(since, \lambda' = \farc{c}{f\sqrt{K}})

\beta = \farc{2\pi f\sqrt{2.56}}{3\times 10^{8}} = 100.53

Now, Substituting the value in eqn (1):

Z_{i} = 75\frac{37.5 + j75 + j75 tan(100.53\times 0.02)}{75 + j(37.5 + j75) tan ( 100.53\times 0.02)} = 18.99 - j20.55 \Omega = 27.98\angle - 47.257^{\circ} \Omega    

Now, the load reflection coefficient is given by:

\Gamma = \frac{Z_{Load} - Z_{c}}{Z_{c} + Z_{Load}}}

Thus

\Gamma = \frac{37.5 + j75 - 75}{75 + 37.5 + j75}} = 0.077 + j0.615 = 0.62\angle 82.875^{\circ} \Omega

Similarly,

Reflection coefficient at input:

\Gamma' = \frac{Z_{i} - Z_{c}}{Z_{c} + Z_{i}}}

\Gamma' = \frac{18.99 - j20.55 - 75}{75 + 18.99 - j20.55}} = - 0.523 - j0.334 = 0.62\angle - 147.518^{\circ} \Omega

Now, the SWR is given by:

SWR, Standing Wave Ratio = \frac{1 +|\Gamma|}{1 - |\Gamma|}

SWR = \frac{1 +|0.62|}{1 - |0.62|} = 4.26

8 0
3 years ago
Which of the following best defines the term nanotechnology?
anastassius [24]
I had this quiz before. But The Answer Is C :)
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To measure the voltage drop across a resistor, a _______________ must be placed in _______________ with the resistor. Ammeter; S
gulaghasi [49]

Answer:

The given blanks can be filled as given below

Voltmeter must be connected in parallel

Explanation:

A voltmeter is connected in parallel to measure the voltage drop across a resistor this is because in parallel connection, current is divided in each parallel branch and voltage remains same in parallel connections.

Therefore, in order to measure the same voltage across the voltmeter as that of the voltage drop across resistor, voltmeter must be connected in parallel.

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1. One of these is NOT a type of pneumatic tool. Which one?
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Answer:Circular

Explanation:

It’s the only thing not list under pneumatic tools‍♂️

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Compare and contrast the roles of agricultural and environmental scientists.
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Answer:

HUHHHHHH BE SPECIFIC CHILE

Explanation:

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