Answer:
The range of powers is
Explanation:
From the question we are told that
The far point of the left eye is
The near point of the left eye is
The near point with the glasses on is
From these parameter we can see that with the glass on that for near point the
Object distance would be
Image distance would be
To obtain the focal length we would apply the lens formula which is mathematically represented as
substituting values
converting to meters
Generally the power of the lens is mathematically represented as
Substituting values
From these parameter we can see that with the glass on that for far point the
Object distance would be
Image distance would be
To obtain the focal length of the lens we would apply the lens formula which is mathematically represented as
substituting values
converting to meters
Generally the power of the lens is mathematically represented as
Substituting values
This implies that the range of powers of the lens in his glass is
Answer:
35.67°
Explanation:
Given that:
angle of glance(i) = 30°
Depth of water d = 1.20 m
The height of the observer above the water is h = 3.10 m - 1.20 m
= 1.90 m
Refractive Index of water (n) = 1.33
Using Snell's Law at the water air interface;
n₁ × sin (90- i) = n₂ × sin (90 - r)
1 × cos (i) = 1.33 cos (r)
r = cos ⁻¹ (cos 30/1.33)
r = 49.4
D = h/tan (i)
D = 1.9 / tan (30)
D = 3.291 m
D' = d/tan (r)
D' = 1.2 m/ tan (49.4)
D' = 1.0285 m
∴ the angle at which the spear is to be thrown is :
x = tan⁻¹ [(h+d)/(D+D')]
x = tan⁻¹ [(1.9+ 1.2)/(3.291+1.0285)]
x = tan⁻¹ [3.1/4.3195]
x = 35.67°
∴ At an angle of 35.67° below horizontal is required for you to throw the spear in order to hit the target.
Answer:
Lymphatic vessels connect to the subclavian veins, which are part of the blood circulatory system and connect to the heart. Their key function is to transport excessive tissue fluid from interstitial spaces throughout the body back to the blood stream.
Explanation:
The lymphatic system works with the cardiovascular system to return body fluids to the blood. The lymphatic system and the cardiovascular system are often called the body's two "circulatory systems."
The lymphatic system consists of all lymphatic vessels and lymphoid organs which include the tonsils, thymus gland, the lymph nodes, spleen, thymus as well as the lymphatic tissue found in the small intestine (Peyer's patches) and throat (adenoid tonsils, palatine and tubal tonsils), to name a few, all represent lymphatic organs.
The cardiovascular and lymphatic are both integral parts of the circulatory system. The cardiovascular system basically moves blood throughout the body. Rather than blood the lymph systems carries a clear fluid called lymph (from Latin lympha, meaning “water goddess”) a fluid containing infection-fighting white blood cells, throughout the body unidirectionally towards the heart. The lymphatic system help rid the body of toxins, waste and other unwanted materials.