The given question is incomplete. The complete question is as follows.
The irregularly shaped area of charge in the figure has surface charge density ηi. Each dimension (x and y) of the area is reduced by a factor of 3.68.
What is the ratio ηf/ηi where ηf is the final surface charge density? I found this value to be 13.5 and it is correct
An electron is very far from the area. What is the ratioFf/Fi of the electric force on the electronafter the area is reduced to the force before the area wasreduced? I found this to also be 13.5, but it is wrong.
Explanation:
Let us consider that expression for area will be as follows.
Area () =
As,
= 13.5
Also, = 1
As the electron is very far from the area. Hence, it can be considered as a point charge. Whereas charge is also constant as the force is not changing.
<span>a) light is a form of matter less dense
than air
b) light travels in straight lines
c) light has different
colors
d) light has different intensities and can be dim or bright
Yes, thank you for coming back and supplying the list of choices.
At the level of Physics all the way up to somewhere in college, <em>choice-a)</em>
is not a property of light.
</span>
The answer should be "The object with the greater mass should be attached to the spring with the smaller <span>spring constant."
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
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Answer:
work done=fdcosø
f=mg=450N
d=+3m
ø=180
450×3×cos(180°) power=work done/
time taken
1350×-1 p=135watts
It is simply a question of the amount of water contained, a lake is much bigger than a pool. The energy ratio is just the ratio of the masses of water concerned. <span>Thermal energy is the total kinetic energy of the particles in a substance .</span>The lake is larger, so it contains more total particles than the swimming pool. The thermal energy of a lake is greater than a swimming pool because the lake is larger.