<span>During a micro-sleep, you are likely to have a blank stare, sudden shake of the body, head snapping and you are not able to recall a last minute.
The duration of micro-sleep are from 1 second to 30 second.
It can happen to anyone and at any time of the day. there are many reason of micro-sleep and it is said to be dangerous, especially when you are driving.
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Less gray matter is associated with schizophrenia and is denoted as option B.
<h3>What is Grey matter?</h3>
These are usually darker tissues which are found in the brain and spinal cord. They contain a rich network of neurons present.
This is therefore the reason why schizophrenia is associated with mental health.
Read more about Grey matter here brainly.com/question/13782390
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The property of DNA which causes it to migrate to the positive pole of the electrophoresis apparatus is B. the negative charge of the DNA.
It acts just like a magnet - positive and negative forces attract.
C is the answer to your problem
Given data:
● Angular velocity of the turntable ω = 33 rev/min
Therefore,
ω = 33 rev/min
ω = 33rev/min × 2π rad/rev × 1 min/60 sec = 3.45 rad/s
● The distance of the watermelon seed from the axis of rotation r = 7.8 cm = 0.078 m
● μs = the coefficient of static friction
Section a:
The seed is undergoes circular motion and it is been effected by centripetal acceleration.
ac = rω^2
ac = 0.078 × 3.45^2
ac = 0.9284 m/s^2
Therefore,
the centripetal acceleration of the seed is 9.274 m/s^2
Section b:
If the seed is observed not to slip at the course of the circular motion, then the supplied frictional force given by the seed and surface of turntable would at least be equivalent to the centripetal force working on the seed.
Centripetal Force = Frictional Force
mrω^2 = μsmg
μs = rω^2 /g
μs = 0.078 × 3.45^2
------------
9.81
μs = 0.09464
Thus,
the coefficient of static friction is 0.09464.