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zloy xaker [14]
3 years ago
12

The eyes of many older people have lost the ability to accommodate, and so an older person’s near point may be more than 25 cm f

rom the eye. Does the older person’s eye have a larger or smaller refractive power than a normal eye, when focused on an object at the near point? Explain.
Physics
1 answer:
tensa zangetsu [6.8K]3 years ago
4 0

Answer:

Smaller refractive power

Explanation:

The refractive power of an eye is the extent to which it can converge or diverge the light rays.

Near point is the the closest point for an eye such that when an object is placed at that point the image it forms is sharp and clearly visible to the eye.

A the person ages, the ciliary muscles of the eyes weakens and as a result the lens contracts and the formation of the image takes place behind the retina instead of forming at the retina.

Thus the near point also increases and the refractive power becomes smaller.

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Which of the following best describes the human population from early times to the present?
Makovka662 [10]

Answer:

We have a not significant increase of the population until 1700s or 1800s and then a significant increase growth from these years to the present.

Explanation:

From the figure attached we see the evolution of the human population since early times (1050).

We see that from 1050 until 1750-1850 we have an increase slowly with a low value for the increase per year.

But after these years (1750-1850) we see a considerable increase of the population, like an exponential model.

So then we can conclude in general terms this:

We have a not significant increase of the population until 1700s or 1800s and then a significant increase growth from these years to the present.

7 0
3 years ago
Which statement provides the most complete description of an object's motion?
vivado [14]

Answer:

A. The bird watcher followed the south trail a distance of five kilometers in 45 minutes.

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3 years ago
In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten
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Answer:

(E) it seems like the best option

3 0
3 years ago
A system is a group of objects that’s analyzed as one unit. Consider a car moving along a road that has a flat section and a hil
vladimir1956 [14]

Answer:

a) Em= K +U,  b) Em= K

Explanation:

The system in this case is formed by the mobilizes and the hill.

Let's write the expressions correctly and completely.

a) When the car moves in the path, the mechanical energy is the siua of the kinetic energy of the car and the potential energy of the car when going up the hill.

              Em = K + U

be) when the car moves in the flat part all the mechanical energy is formed by its kinetic energy that is calculated with the mass and speed of the car

             Em = K

c) When the car goes up the hill the energy the mechanical energy is conserved, but part of the kinetic energy is transformed into potential energy.

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3 years ago
Electromagnetic wav​
krek1111 [17]

Answer:

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Explanation:

6 0
3 years ago
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