Which statement is true about a polarized object?
2 answers:
Answer: Option (3) is the correct answer.
Explanation:
When an object is polarized then it means that if a negatively charged object is brought near a neutral atom then a positive charge will develop on the neutral object near the area of contact.
Whereas a negative charge will develop on the opposite side neutral object which is not in contact with the negatively charged object.
Hence, in a polarized object there are equal number of both positive and negative charges.
Thus, we can conclude that the statement number of positive and negative charges can be the same, is true about a polarized object.
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Answer:
2.84 m/s
Explanation:
At the top position of the circular trajectory, the normal reaction is zero:
N = 0
So it means that the only force that is providing the centripetal force is the gravitational force (the weight of the bucket). Therefore we have:
where
m is the mass of the water bucket
g = 9.8 m/s^2 is the acceleration of gravity
v is the speed of the bucket
r = 0.824 m is the radius of the circle
Solving for v,