Which of the following does a finding of no significant impact (FONSI) negate the need for?

While out on the International Space Station, an engineer was able to gather a sample of a new type of unidentified rock. What k

kvasek [131]

Answer:

geology and engineering

Explanation:

In this specific scenario, the engineer would use all of his geology and engineering knowledge in order to discover some of the potential uses. This is because the field of geology focuses on understanding rocks and all the minerals that make up that specific rock. While engineers focus on finding new ways to get certain tasks done through new technology and resources. By putting his/her knowledge of both of these tasks, the engineer can quickly determine the potential that the newly discovered rock has and the value that it can bring.

3 0

3 years ago

Read 2 more answers

What kind of job does Malcolm have?

Effectus [21]

Huh? what do you mean?

8 0

3 years ago

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An important concept to aid understanding of electromagnetics is electrical length. Electrical _________ is a unitless measure t

kondor19780726 [428]

Answer: Electrical length is a unitless measure that refers to the length of a wire or device at a certain frquency. It is defined as the ratio of the physical length of the device to the wavelength of the signal frequency.

Explanation:

In nature, the maximum speed achievable for any interaction or perturbation along a medium (like a wire) can't be higher than the speed of light, otherwise it would be violating Einstein's Relativity Theory.

So, in a given circuit, the voltage and current aren't set up instantaneously, and a finite time exists since a battery is connected to a circuit till a stable current traverses a load resistor connected to it.

Now, the electrical length, defines how important in is this delay, in the calculation of the voltage through the resistor, for instance.

We can write the electrical length (L.E.) as follows:

L.E. = L / (v/f) = L / λ

As we can see, the effect depends not only on the circuit dimensions, but the frequency of the signal as well.

If L.E. is much smaller than λ, this means that we can neglect the effects of the delay, and we can use the circuit theory, namely KVL, KCL and Ohm's law to analyze the circuit, assuming that the current establishes instantaneously.

Otherwise, the current and voltage concepts are not valid anymore, as we need to think in terms of propagation of electromagnetic waves, like in transmission lines and antennas.

Roughly, if L.E. ≤ 20 λ, we say that we are still in the realm of the circuit theory.

3 0

3 years ago

g (b) (4 pt) Write a function unique that identifies the repeated elements of a list and returns a list with unique elements. $

Taya2010 [7]

Answer:

I am writing a Python function unique()

def unique(list): # function unique that takes a list as parameter

unique_list = [] #list to store unique elements

for elements in list: # loop that checks every element of the list

if elements not in unique_list: # takes unique elements from list

unique_list.append(elements)

#appends unique elements from list to unique_list

return unique_list #outputs unique_list elements

Explanation:

The unique() function takes a list as argument which is named as list.

unique_list is a new list which stores unique element from the list.

The loop moves through the elements of the list one by one.

if condition checks if the element in list is not present in the unique_list which means that element is unique to the unique_list.

If this condition is true this means that the element is not repeated and is not already present in unique_list. Then that element is included to the unique_list using append() function which appends an element into the unique_list from the list.

If you want to check if this function works you pass a list with repeated elements to this function so that it can print the unique elements as follows:

print(unique([1,2,2,2,2,3,4,4,4,4,4,5]))

Output:

[1, 2, 3, 4, 5]

The screen shot of the function along with its output is attached.

6 0

4 years ago

A 15,000 kg satellite is orbiting at 800 km above the Earth’s surface. What is the potential energy of the satellite?

vredina [299]

Answer:

$-8.34\times 10^{11}\ \text{J}$

Explanation:

m = Mass of satellite = 15000 kg

h = Distance above Earth = 800 km

R = Radius of Earth = 6371 km

M = Mass of Earth = $5.972\times 10^{24}\ \text{kg}$

G = Gravitational constant = $6.674\times 10^{-11}\ \text{Nm}^2/\text{kg}^2$

Potential energy is given by

$U=-\dfrac{GMm}{R+h}\\\Rightarrow U=-\dfrac{6.674\times 10^{-11}\times 5.972\times 10^{24}\times 15000}{(6371+800)\times 10^3}\\\Rightarrow U=-8.34\times 10^{11}\ \text{J}$

The potential energy of the satellite is $-8.34\times 10^{11}\ \text{J}$ .

6 0

3 years ago