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Vadim26 [7]
3 years ago
6

Write a function named is_float(s) that takes one argument that is a string. It returns True if string s represents a floating p

oint value and returns False otherwise. You are required to use try-except. The basic concept is to "try" to convert string s to a float and if it succeeds, return True, but if it fails (that is, an exception is raised), return False. Note that float() raises a ValueError exception.
Engineering
1 answer:
Vedmedyk [2.9K]3 years ago
8 0

Answer:

Explanation:

# Python Programme

#!/usr/bin/python

# Function definition is here

def is_float( str ):

try:

float(str)

return True

except ValueError:

return False

# Now you can call is_float function

print(is_float("3.45"))

print(is_float("3e4"))

print(is_float("abc"))

print(is_float("4"))

print(is_float(".5"))

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Answer:

At steady state output will be 2

Explanation:

We have given transfer function G(S)=\frac{6}{12S+3}

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Y(S)=\frac{1}{2S(S+\frac{1}{4})}

Now using partial fraction

\frac{1}{2S(S+\frac{1}{4})}=\frac{A}{2S}+\frac{B}{(S+\frac{1}{4})}

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AS+\frac{A}{4}+2BS=1

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y(t)=2-2e^{\frac{-t}{4}}

Steady state means t tends to infinite

So output at steady state = y(t)=2-2e^{\frac{-\infty}{4}}

y(t)=2-0=2  

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