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kifflom [539]
3 years ago
6

A block is sliding on a level surface of varying materials, and so its effective coefficient of friction is variable, 0.1t, wher

e t is the time in seconds for how long the block has been sliding. If the block was initially moving at 43.5 m/s, then how far does it move in 5.1 s
Engineering
1 answer:
4vir4ik [10]3 years ago
5 0

Answer:

\Delta s = 189.166 m

Explanation:

The physical for the system is based on Work-Energy Theorem and Principle of Energy Conservation. The system decelerates because of friction before coming to rest:

K_{1} = W_{loss,1 \longrightarrow 2}

\frac{1}{2} \cdot m \cdot v^{2} = \mu (t) \cdot m \cdot g \cdot \Delta s

The distance before stopping is isolated from expression presented above:

\Delta s = \frac{ v^{2}}{2 \cdot \mu(t)\cdot g}

Where \mu (t) = 0.1\cdot t and g = 9,807 \frac{m}{s^{2}}.

By replacing all variables, the needed distance is finally found:

\Delta s = \frac{(43.5 \frac{m}{s})^{2}}{2 \cdot [0.1\cdot (5.1 sec)]\cdot (9.807 \frac{m}{s^{2}} )}

\Delta s = 189.166 m

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Answer:

Explanation:

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        ("Joan", "unlisted", 12.7) :: Nil

 

type listOfTuples = List[(String, String, Double)]

def find_salary(name: String) = {

 def search(t: listOfTuples): Double = t match {

   case (name_, _, salary) :: t if name == name_ => salary

   case _ :: t => search(t)

   case Nil    =>

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 }

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}

def select(pred: (String, String, Double) => Boolean) = {

 def search(found: listOfTuples): listOfTuples = found match {

   case (p1, p2, p3) :: t if pred(p1, p2, p3)  => (p1, p2, p3) :: search(t)

   case (p1, p2, p3) :: t if !pred(p1, p2, p3) => search(t)

   case Nil => Nil

   case _ => throw new Exception("Invalid Argument in select function")

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println("Searching the salary of 'Joan' at db: " + find_salary("Joan"))

println("")

 

val predicate = (_:String, _:String, salary:Double) => (salary < 100.0)

println("All employees that match with predicate 'salary < 100.0': ")

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7 0
3 years ago
The two types of outlets that are found in an electrical system are:______
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Answer:

a. lighting and receptacle outlets

Explanation:

The two types of outlets that are found in an electrical system are

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Remember from Lab 3C that Mad Libs are activities that have a person provide various words, which are then used to complete a sh
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Answer:

Python code is explained below

Explanation:

CODE(TEXT): -

9A.py:-

def sentence(): #function to read input and display

  name = input("Enter a name: ") #input name

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  number = int(input("Enter a number: ")) #input number typecasted to int

  noun = input("Enter a plural noun: ") #input plural noun

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op = "n" #initially op = n i.e. user not wanting to quit

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9B.py: -

#inputs are strings by default applying a split() function to a string splits it into a list of strings

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numbers = list(map(int, input("Enter the input: ").split()))

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for i in range(1, len(numbers)): #loops for all remaining elements

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1) Relative to electrons and electron states, what does each of the four quantum numbers specify?
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Cite two important additional refinements that resulted from the Wave-mechanical

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