Question

A cooling fan is turned off when it is running at 920 rev/min. It turns 1100 revolutions before it comes to a stop.

Part A What was the fan's angular acceleration, assumed constant? Express your answer using three significant figures.

Part B How long did it take the fan to come to a complete stop? Express your answer to three significant figures and include the appropriate units.

Answer #1

IP A ceiling fan is rotating at 0.80 rev/s .
When turned off, it slows uniformly to a stop in 2.1 min .
Part A
How many revolutions does the fan make in this time?
Express your answer using two significant figures.
Δθ=
rev
Part B
Using the result from part A, find the number of revolutions the
fan must make for its speed to decrease from 0.80 rev/s to 0.40
rev/s .
Express your answer using two significant figures....

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revolutions made by the fan blades during the time that they are
slowing down in part A. (c) How many more seconds are required for
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constant...

An electric fan is turned off, and its angular velocity
decreases uniformly from 550 rev/min to 150 rev/min in a time
interval of length 3.85
A)Find the angular acceleration in rev/s2.
B)Find the number of revolutions made by the motor in the time
interval of length 3.85 s
C)How many more seconds are required for the fan to come to rest
if the angular acceleration remains constant at the value
calculated in part A?

An electric ceiling fan is rotating about a fixed axis with an
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.
a.) Compute the fan's angular velocity magnitude after time 0.209 s
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b.) Through how many revolutions...

When a fan is turned off, its angular speed decreases from 27
rad/s to 4.0 rad/s in 1.7 revolutions. Assuming it is constant,
what is the angular acceleration of the fan?
-210 rad/s2
-1.1 rad/s2
-9.8 rad/s2
-33 rad/s2

A centrifuge in a medical laboratory rotates at a rotational
speed of 2600 rev/min. When turned off, it rotates 25.0 times at a
constant angular acceleration before coming to rest. The angle
through which the centrifuge rotates before coming to rest is A.
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while staring at your ceiling fan, you decide to study the
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the fan has a 1.10 m diameter.
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The drill used by most dentists today is powered by a small
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Find the angular acceleration produced by the drill, assuming...

When a carpenter shuts off his circular saw, the
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Part A What is the angular acceleration of the
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(answer in rad/s2)
Part B What is the distance traveled by a point
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(answer in ft.)
Part C What is the magnitude of the net
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When an x-ray beam is scattered off the planes of a crystal, the
scattered beam creates an interference pattern. This phenomenon is
called Bragg scattering. For an observer to measure an
interference maximum, two conditions have to be satisfied:
The angle of incidence has to be equal to the angle of
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The difference in the beam's path from a source to an observer
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