<span>From the
small number of impact craters on moon, planetary geologists suspect
that virtually all its original surface has been covered over by younger
volcanic activity</span>. Most
of the Moon's surface is densely covered with craters, but we find relatively few
craters within the lunar maria.<span> </span>
The interaction of light that distorted the image of where Bill's goggles appear to be is Refraction.
<h3>
What happens to the speed of light when it hits water in a swimming pool?</h3>
The light slows down when it passes from the less dense air into the water, this slow down of the ray of light which causes the ray of light to change direction and then the changes the speed of the light that causes refraction.
The swimming pool appears shallow than it appear to be because the rays of light coming from the bottom of the swimming pool that is refracted by the water making the height of the swimming pool to be above the actual swimming pool bed and there by misleading the observer(Bill).
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Answer:
(a) 498.4 Hz
(b) 442 Hz
Solution:
As per the question:
Length of the wire, L = 1.80 m
Weight of the bar, W = 531 N
The position of the copper wire from the left to the right hand end, x = 0.40 m
Length of each wire, l = 0.600 m
Radius of the circular cross-section, R = 0.250 mm = 
Now,
Applying the equilibrium condition at the left end for torque:
The weight of the wire balances the tension in both the wires collectively:
Now,
The fundamental frequency is given by:
where
(a) For the fundamental frequency of Aluminium:
where
(b) For the fundamental frequency of Copper:
where
Well since we're doing the Lewis dot diagram do you know which element on the table that it is?
