Complete Question
The complete question is shown on the first uploaded image
Answer:
a

b

c

Explanation:
From the question we are told that

From the question we are told to find
when t=0 equals the time constant (
)
That is to obtain
.This is mathematically represented as

Substituting 12 V for
and 150Ω for R


From the question we are told to find
when t=0 equals the 3 times the time constant (
)
That is to obtain
.This is mathematically represented as



As tends to infinity 
So
would be mathematically evaluated as



Answer:
It can go back to it's original shape
Explanation:
E all of the answers above correlate to the student and his skateboard
Answer:
The answer is a TRANSLATION TOOL or D
Explanation:
To solve this problem it is necessary to apply the concepts related to frequency as a function of speed and wavelength as well as the kinematic equations of simple harmonic motion
From the definition we know that the frequency can be expressed as

Where,


Therefore the frequency would be given as


The frequency is directly proportional to the angular velocity therefore



Now the maximum speed from the simple harmonic movement is given by

Where
A = Amplitude
Then replacing,


Therefore the maximum speed of a point on the string is 3.59m/s