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EleoNora [17]
3 years ago
7

You and your dog are walking along a pond. Your dog looks into the still water and is startled to see its reflection. Which phen

omenon is responsible for the appearance of the dog’s reflection on the water's surface? A. diffraction of water waves B. reflection of lightwaves C. refraction of lightwaves D. reflection of water waves E. refraction of water waves
Physics
2 answers:
Lostsunrise [7]3 years ago
4 0

<u>Answer:</u> Option B: Reflection of light waves.

<u>Explanation: </u>

Reflection occurs when light waves bounce back from any surface. When the dog looks into the still water, it could see its own reflection. This is because the light waves incident from dog gets reflected on the surface of water and dog is able to see its own reflection.

Hence, the phenomenon responsible for appearance of dog's reflection on surface of water is reflection of light waves.

attashe74 [19]3 years ago
3 0

You just identified the image as a "reflection", so it's a pretty good bet that
the phenomenon involves reflection somehow.

Your dog can see his reflection in a mirror inside the house just as easily
as in the surface of the pond.  My dogs do it all the time.  The phenomenon
doesn't require water.

It's reflection of light waves.

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4 0
3 years ago
A fisherman is fishing from a bridge and is using a "42.0-N test line." In other words, the line will sustain a maximum force of
lara31 [8.8K]

Answer:

(a) 42 N

(b)36.7 N

Explanation:

Nomenclature

F= force test line (N)

W : fish weight  (N)

Problem development

(a) Calculating of weight of the heaviest fish that can be pulled up vertically, when the line is reeled in at constant speed

We apply Newton's first law of equlibrio because the system moves at constant speed:

∑Fy =0

F-W= 0

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W = 42N

(b) Calculating of weight of the heaviest fish that can be pulled up vertically, when the line is reeled with an acceleration whose magnitude is 1.41 m/s²

We apply Newton's second law because the system moves at constant acceleration:

 m= W/g , m= W/9.8 ,  m:fish mass , W: fish weight g:acceleration due to gravity

∑Fy =m*a

m= W/g , m= W/9.8 ,  m:fish mass , W: fish weight g:acceleration due to gravity

F-W= ( W/9.8 )*a

42-W=  ( W/9.8 )*1.41

42= W+0.1439W

42=1.1439W

W= 42/1.1439

W= 36.7  N

8 0
3 years ago
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Answer:

hi there!!

Explanation:

Nickel  149 pm

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Potassium  243 pm

So Potassium is the correct answer

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