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Rudik [331]
2 years ago
14

two people are standing 100m apart on the bank of a river that flows due east. if a rock on the opposite bank is along a bearing

of N 25 degrees East from one person and along a bearing of N 15 dEGREES wEST FROM the other person, what is the width of the river?

Physics
1 answer:
salantis [7]2 years ago
3 0

Answer:160.88 m

Explanation:

Given

Distance Between two person is 100

i.e. p+q=100

Let W be the width of River

From First Triangle

p=W\tan 24

From Second Triangle

q=W\tan 10

W\tan 24+W\tan 10=100

W(\tan 24+\tan 10)=100

W=\frac{100}{0.6215}

W=160.88 m

       

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Answer:

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In the opposite case, when the fish looked at the face of the man, the angle of greater reason why it seems to be further away

Explanation:

This exercise can be analyzed with the law of refraction that establishes that a ray of light when passing from one medium to another with a different index makes it deviate from its path,

      n₁ sin θ₁ = n₂ sin θ₂

where n₁ and n₂ are the refractive indices of the incident and refracted means and the angles are also for these two means.

In this case, the index of seawater replacement is 1.33, the index of refraction of air is 1, which is why the angle of replacement is less than the incident angle, so the fish seems to be closer

1 sin θ₁ = 1.33 sin θ₂

        θ₂ = sin⁻¹ ( 1/1.33 sin θ₁)

In the opposite case, when the fish looked at the face of the man, the angle of greater reason why it seems to be further away

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2 years ago
Seema knows the mass of basketball. What other information is needed to find the balls potential energy
Lelu [443]

Answer: The height (position) of the ball and the acceleration due gravity

Explanation:

In this case we are taking about gravitational potential energy, which is the energy a body or object possesses, due to its position in a gravitational field.  In this sense, this energy depends on the relative height of an object with respect to some point of reference and associated with the gravitational force.  

In the case of the Earth, in which the gravitational field is considered constant, the gravitational potential energy U will be:  

U=mgh  

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h is the height (position) of the ball respect to a given point

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Explanation:

This is the right answer i just took the quiz on edge.

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2 years ago
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Answer:

29.4 N/m

0.1  

Explanation:

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F_r = —k*x  

the gravitational force :  

F_g=mg  

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F_r is the restoring force .

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g is the acceleration of gravity

k is the constant force  

xi , x2 are the displacement made by the two masses.

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<em>m1 = 1.29 kg</em>

<em>m2 = 0.3 kg  </em>

<em>x1   = -0.75 m  </em>

<em>x2 = -0.2 m </em>

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Plugging known information to get :

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m1 = 1.95kg , x1 = —0.75m  

Plugging known infromation to get :

l= x1 — (F_1/k)  

= 0.1  

 

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