What would be the first thing you would do if your clothes caught fire while working in a laboratory? select one of the options
1 answer:
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Complete Question
The complete question is shown on the first uploaded image
Answer:
The dopant density is ND ≈ 8.135*10¹² cm⁻³
Explanation:
The explanation is shown on the second , third ,fourth and fifth uploaded image
(a) 119.3 rad/s
The angular speed of the wheel is
we need to convert it into radiands per second. We know that
Therefore, we just need to multiply the angular speed of the wheel by this factor, to get the angular speed in rad/s:
(b) 596.5 rad
The angular displacement of the wheel in a time interval t is given by
where
and
t = 5 s is the time interval
Substituting numbers into the equation, we find
(c) 127.3 rad/s
At t=10 s, the angular speed begins to increase with an angular acceleration of
So the final angular speed will be given by
where
is the initial angular speed
is the angular acceleration
is the time interval
Solving the equation,
(d) 616.5 rad
The angle through which the wheel has rotated during this time interval is given by
Substituting the numbers into the equation, we find
(e) 222 m
The instantaneous speed of the center of the wheel is given by
(1)
where
is the average angular velocity of the wheel during the time t=10 s and t=15 s, and it is given by
and
R = 36 cm = 0.36 m is the radius of the wheel
Substituting into (1),
And so the displacement of the center of the wheel will be