What is the function of the lens of an eye

Answers

Answer 1
The lens changes the focal distance of the eye so that you can focus on images/objects. 
Answer 2

Answer:

The lens is located in the eye. By changing its shape/curvature, the lens changes the focal distance of the eye. In other words, it focuses the light rays by changing its curvature and let light pass through it in order to create clear images of objects . It also works together with the cornea to refract, or bend, light.


Related Questions

How much work can a 23,000 Watt car engine do in 35 seconds if it is 100% efficient?

Answers

Power = Work / Time in cases where there is 100% efficiency. 

Our given power is 23,000 Watts, and our time is 35 seconds.

23,000 Watts = Work / 35 seconds

We multiply both sides by 35 seconds to get...

805,000 Joules of work (since Watts x seconds = Joules)

What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?

(a) 200,000 s

(b) 2 s

(c) 0.5 s

(d) 100 s

Answers

Uh it's c) 0.5 :), and for some reason i need to write 20 characters to explain it well, okay you need to divide speed/wavelength, that's it
It's 0.5 I thought it was 2 but I was wrong it's 0.5

What should a sailboat operator do when approaching a PWC head-on

Answers

In accordance with the International Regulation for the prevention of collisions at sea:

1.- A sailing boat has a passing preference over a motorized boat, except when the motor boat is limited by its draft.

2.- The sailboat must maintain its course and speed.

3.- If it is evident that the PWC does not respond, the sailboat must sound the warning signal, and change its course to starboard.

4.- All actions must be taken as soon as possible.

5.- If a sailboat is using its engine, the situation changes, and in that case, both ships must alter to starboard.

Final answer:

When a sailboat operator approaches a PWC head-on, the operator should change course to starboard (right), while keeping the vessel at a safe speed and maintaining a proper observation to assess risk of collision.

Explanation:

When a sailboat operator is approaching a PWC (Personal WaterCraft) head-on, the operator should follow rules regarding right of passage, which are set in place to minimize the risk of collision. These rules are part of the numerous international maritime navigation laws.

The primary method of avoiding collision is by steering to the right, or 'starboard', when it is safe to do so. The rule 'starboard to starboard' means that both vessels should deviate their course to starboard. This is akin to 'keep to your right' rule on the road.

However, before attempting any manoeuvre, it is crucial to maintain a safe speed and have a proper lookout for assessing risk of collision. One should use all available ways like sight, sound or radar to ascertain any risk.

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Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings
decrease the electric current
change the core from wood to iron
all of the above

Answers

To INcrease the strength of an electromagnet ...

... INcrease the number of windings
... INcrease the electric current (by increasing the voltage of the battery)
... change the core from wood to iron

change the core from wood to iron


Which adaptation is likely to increase the chances of survival of an animal in a rainforest?
Capacity to glow in the dark to attract predators
Bright colors as camouflage while stalking prey
Green color so that it can photosynthesize using sunlight
Black-spotted skin coat as camouflage while stalking prey

Answers

Black-spotted skin coat as camouflage while stalking prey.
Survival = avoiding predators or capturing prey successfully

Answer: Option D

Explanation: The rainforest is the place rich in diversity. There are different types of plants and animals in the rain forest.

The organism that is living their should have black spotted skin coat which can act as camouflage when the organism is stalking the prey.

So, the best adaption in the rain forest will be black spotted skin.

How is it possible you can feel heat from the sun?

Answers

there are three ways by which we can transfer heat from one place to other

1. Conduction

In this method of heat transfer heat can be transferred from one place to other without actual movement of medium molecules. This is possible in solid conducting mediums

2. Convection

Here heat energy is carried away along with the medium molecules where medium molecules can move from one place to other while heat is transferred. It is possible in liquid and gas but not possible in solids

3. Radiation

In this mode of heat transfer we do not require any medium and here heat transferred by electromagnetic waves

So we can feel heat from sun in form of electromagnetic waves and it is the fastest way to transfer the heat also it do not require any medium

How do scientists detect the various electromagnetic waves coming from space?

Answers

The electromagnetic spectrum defines all the wavelengths of light. Scientist uses different kinds of telescopes sensitive to different wavelengths of the spectrum. Large infrared telescopes are used to view the core of our galaxy. Moreover, radio telescopes are used to map the structure of our galaxy while microwave telescopes captures the remnant glow of the Big Bang.

Which one of the following statements best describes the just world hypothesis?

Answers

The just-world hypothesis is the assumption that a person's actions are inherently inclined to bring morally fair and fitting consequences to that person, to the end of all noble actions being eventually rewarded and all evil actions eventually punished. 

The statement that best describes the just world hypothesis is people deserve what happens to them, whether good or bad. The correct option is a.

What is a hypothesis?

A hypothesis is a testable declaration about the relationship among two or more variables or a suggested explanation for some observed phenomenon in a scientific context.

A hypothesis is an assumption formed based on evidence. This is the first step in any investigation that converts research questions into predictions. It consists of variables, a population, and the relationship between the variables.

A hypothesis is a statement rather than a question. The scientific question in your project is not your hypothesis. The hypothesis is a well-informed, testable prediction of what will occur.

A scientific paper should begin with a clear statement of the hypothesis. This helps the reader understand the issue. People deserve what happens to them, whether good or bad, according to the statement that best describes the just world hypothesis.

Thus, the correct option is a.

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Your question seems incomplete, the missing options are:

a. People deserve what happens to them, whether good or bad.

b. If people act with integrity, they contribute to a just world.

c. The world is just, but some people don't think it is.

d. People who work hard are superior to those who are lazy. User: If you exhibit a high level of psychological hardiness, you're probably the type of person who

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places?

Answers

If a ball is if a ball is dropped from a 576ft building it would take about 8 seconds for it to hit the ground.

Vivisection refers to the live dissection of animals or the use of live animals for experimental research. Please select the best answer from the choices provided T F

Answers

the answer to this question is true

Answer:

The given statement is true.

Vivisection derives from the Latin words "vivus" which means "alive" and "sectio" which means cutting.

Thus, it refers to the surgery or dissection of living organism conducted for the experimental purposes.

It not only helps in medical and biological research but also in education and training of the veterinarians and doctors.

Which of the following measurements is used to measure the distance between astronomical bodies?

Speed of light
Speed of sound
Speed of spacecraft
Speed of rotation of Earth

Answers

combination   of  the orbit of the earth  and the speed of light.
distances   are measured in light years.

Generally we use speed of light to measure the distance between two astronomical bodies

Because astronomical bodies are very far from each other

and we use light year as the unit of distance for large distances

1 light year is the distance covered by light in one year

so speed of light is correct option here

The voltage of electricity traveling away from a power plant is very high. How high may it be? Why is the voltage so high?

Answers

- The voltage travelling away from a power plant through transmission lines is very high, and it is typically of hundreds of kilovolts (typical values are between 138 kV and 765 kV).

- The main reason to use these high values of voltage is to reduce power dissipation.
In fact, the cables that are used to transmit electricity have a certain resistance R which is fixed. The power generated from the power plant and that should be transmitted through the lines is P, and it is also fixed. 
The power dissipated through the cables is calculated as
[tex]P_{diss}=I^2 R = (\frac{P}{V} )^2 R[/tex]
where I is the current and V the voltage.
As it  can be seen, using higher voltages reduce the amount of power dissipated through the lines (while using higher currents will have the opposite effect).

if the mass of a moving object decreases from 100 grams to 25 grams, what happens to its momentum?

a. its reduced 1/4 of the original momentum
b. its reduced 1/2 of the original momentum
c. not affected by change in mass
d. becomes 4 times the orignal momentum

Answers

The correct answer is c. not affected by change in mass

The law of conservation of momentum states that, for an isolated object (=zero net external force acting on it), the momentum of the object is conserved.

As a result, if there are no external forces acting on the object in the problem, its momentum will not change even though its mass changes. In fact, the momentum is given by the product between mass and velocity:

[tex]p=mv[/tex]

therefore, when the mass of the object decreases by a factor of 4, the velocity will increase by a factor of 4, keeping the momentum of the object constant.

Momentum is reduced to one-quarter of its original value when the mass of an object decreases from 100 grams to 25 grams, assuming velocity remains constant. The correct answer is option 'a'.

Understanding Momentum and Mass

Momentum is defined as the product of an object's mass and its velocity, given by the formula: momentum = mass × velocity.

When the mass of a moving object decreases from 100 grams to 25 grams, while assuming the velocity remains constant, we can calculate the change in momentum as follows:

Initial momentum: [tex]mass_{initial} \times velocity = 100 grams \times velocity[/tex]Final momentum: [tex]mass_{final} \times velocity = 25 grams \times velocity[/tex]

Therefore, the final momentum is one-quarter of the initial momentum because 25 grams is one-quarter of 100 grams.

What is the gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building?

Answers

The gravitational potential energy of a 65.7 kg person standing on the roof of a 135 meter building is 86,752.17 Joules, calculated using the formula PEg = mgh.

The gravitational potential energy (PEg) of a person or object is calculated using the formula PEg = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m/s² on Earth), and h is the height above a reference point in meters.

In the case of a 65.7 kg person standing on the roof of a 135 meter building, the gravitational potential energy can be calculated as follows:

PEg = mgh = (65.7 kg) (9.8 m/s²) (135 m) = 86,752.17 Joules

Hence, the person has a gravitational potential energy of 86,752.17 J when standing on the roof of the building.

If a substance is in the gas phase, which of qualities of the gas will stay constant?

volume
mass
shape
position of particles

Answers

Volume - hope this helps (:


Answer:

Mass is the right answer

Explanation:

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy. The particles move very fast and collide into one another, causing them to diffuse, or spread out, until they are evenly distributed throughout the volume of the container.

Therefore the only constant property about matter in a gas state is its mass!

If you have to apply 40n of force on a crowbar to lift a rock that weights 400n, what is the actual mechanical advantage of the crowbar

Answers

The mechanical advantage is defined as the ratio between the force produced by a machine and the force applied in input:
[tex]MA= \frac{F_{out}}{F_{in}} [/tex]
For the crowbar of the problem, the force applied in input is 40 N, while the force produced in output is equal to the weight of the rock that is lifted, so 400 N. Therefore, the mechanical advantage is
[tex]MA= \frac{400 N}{40 N}=10 [/tex]

The actual mechanical advantage of the crowbar used to lift a 400N rock with a 40N effort is 10.

The actual mechanical advantage of a crowbar is calculated by dividing the load force by the effort force. In this case, if a 400N rock is lifted using a crowbar with an effort of 40N, the mechanic advantage is calculated as follows:

Actual Mechanical Advantage (AMA) = Load Force (N) / Effort Force (N)

AMA = 400N / 40N

AMA = 10

Therefore, the actual mechanical advantage of the crowbar is 10, which means that the force applied is multiplied by 10 times when lifting the rock.

Jake uses a fire extinguisher to put out a small fire. When he squeezes the handle, the flame rettardant is released from the extinguisher with considerable force. As a result, Jake has to reinforce his grip on the extinguisher to hold it in place as it pushes back into his hands. The projectile in this scenario is the . The recoil in this scenario is the . The force on the flame rettardant is the force on the extinguisher. The mass of the flame rettardant is the mass of the extinguisher. The acceleration of the flame rettardant is the acceleration of the extinguisher.

Answers

The projectile in this scenario is the flame r.

The recoil in this scenario is the extinguisher.

The force on the flame r is equal to the force on the extinguisher.

The mass of the flame r is less than the mass of the extinguisher.

The acceleration of the flame r is greater than the acceleration of the extinguisher.

Answer:

The projectile in this scenario is the flame r.

The recoil in this scenario is the extinguisher.

The force on the flame r is equal to the force on the extinguisher.

The mass of the flame r is less than the mass of the extinguisher.

The acceleration of the flame r is greater than the acceleration of the extinguisher.

what is the gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building ?

Answers

''Gravitational PE is calculated as mgh where m is a mass, g is the acceleration due to gravity, and h is a perpendicular height. 
So in this case PE = 1*9.81*50 = 490.5J 
I am assuming that 50m is the height of the building.''

hope this helps

The gravitational potential energy relative to the ground of a 1.0-kg box at the top of a 50-m building is  490 Joule.

What is  gravitational potential energy?

The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.

Mass of the box = 1.0 kg.

Height of the box relative to the ground = 50 meter.

Acceleration due to gravity = 9.8 m/s²

Hence,  the gravitational potential energy is = Mass of the box × Height of the box × Acceleration due to gravity

= 1.0 kg ×  50 meter × 9.8 m/s².

= 490 Joule.

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The density of silver is 10.5 g cm3. a piece of silver with a mass of 61.3 g would ovvupy a volume of ?

Answers

The relationship between mass m, volume V and density d is:
[tex]d= \frac{m}{V} [/tex]
The silver has density [tex]d=10.5 g/cm^3[/tex], and the mass of the piece of silver is [tex]m=61.3 g[/tex]. Therefore we can calculate its volume using the previous formula:
[tex]V= \frac{m}{d}= \frac{61.3 g}{10.5 g/cm^3}=5.84 cm^3 [/tex]
Final answer:

The volume of a piece of silver with a mass of 61.3g and a given density of 10.5 g/cm³ would be approximately 5.83 cm³.

Explanation:

The subject is about density which is the ratio of the mass of a sample of the substance to its volume. The SI unit for density is the kilogram per cubic meter (kg/m³) or for many situations, the grams per cubic centimeter (g/cm³) for solids and liquids, and grams per liter (g/L) for gases.

Given the density (D) of silver as 10.5 g/cm³ and the mass (m) as 61.3 g, we can use the formula Density = mass/volume or rearranged to Volume = Mass/Density. After inserting the given values into the equation, we get that the Volume (V) would be approximately 5.83 cm³.

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In an electron cloud an element that is farther away from the nucleus has

Answers

Hello,

Here is your answer:

The proper answer to this question is that "it has higher energy than a electron cloud closer to the nucleus".

If you need anymore help feel free to ask me!

Hope this helps! 

When a boat moves through the water, the waves in front of the boat bunch up, while the waves behind the boat spread out. this is an example of?

Answers

Answer: Doppler Effect

Doppler Effect can be described as the change in wavelength of a wave like upward shift in frequency for an object whom is approaching and an apparent downward shift in frequency for observers from whom the source is receding. This effect can be observed when a boat moves through the water then the waves in front bunch up while the waves behind the boat spread out.

During the Pleistocene, a land bridge connected Alaska and Asia. What could have caused this bridge to from? the ending of an ice age the beginning of an ice age the erosion of the Alaskan coastline the erosion of the Asian coastline

Answers

The appropriate answer is b. the ending of an ice age. The Pleistocene epoch began 1.8 million years ago. The last ice age is known as the Wisconsin Glaciation, which peaked around 18,000 years ago. During this period there was more than three times the amount of ice on Earth today.
The continents were larger because water was locked in ice and so the shelves surrounding the continents were exposed. The land bridge between Asia and Alaska was created because of this drop in sea level.

The correct answer is beginning of ice age.

During the time of ice age, the supply of water of locked in the ice of the glaciers.

The level of sea worldwide decreased and the land came out of the sea and joined the two continents.

The environment of the Bering bridge was very dried so it remained a dried and there were no glaciers during the whole ice age.

What causes the curved path of a projectile??

Answers

the combination of initial forward velocity and downward vertical force of gravity

The curved path of a projectile, known as its trajectory, is primarily due to the influence of gravity, along with other factors such as air resistance and the rotation of the Earth.

Gravity: The dominant force acting on a projectile is gravity, which pulls the object downward toward the center of the Earth. As a projectile moves forward, gravity pulls it down, causing it to follow a curved path rather than a straight line. The motion creates a parabolic trajectory when air resistance is negligible.

Initial Velocity and Launch Angle: When a projectile is launched, it has an initial velocity and is given a specific angle with respect to the horizontal. These factors contribute to how high and how far the projectile will travel.

Air Resistance: In real-world scenarios, air resistance also plays a significant role in shaping the projectile's path. This force opposes the motion of the projectile and causes deviations from the ideal parabolic path. The effect of air resistance can be complex and often results in a more flattened trajectory.

Why is it important to make healthy choices about your diet and exercise?

Answers

I believe it's good because it benifits your body, and it helps the decisions you make. Yoru diet is important because you want to control what you eat. If you eat everything you see that is not going to be good in your adult years. Excersise is good to stay fit, and help work off that extra food you do eat. Overall it's good for your body, mind, and helps reduce the risk of hear disease and cancer. And those do play a big role.
~Deceptiøn

Final answer:

Regular exercise, combined with a healthy diet, offers a myriad of health benefits, from disease prevention to cognitive enhancement.

Explanation:

Regular physical exercise is essential in preventing various diseases such as cardiovascular disease, cancer, diabetes, and obesity. Muscle health and strength significantly improve with consistent exercise.

When combining exercise with a healthy diet, individuals are less likely to be obese and experience benefits such as improved cardiovascular health, lowered blood pressure, enhanced diabetes management, joint flexibility, and muscle strength.

Exercise not only influences physical health but also slows cognitive impairments associated with aging, showcasing the holistic benefits of staying physically active throughout life.

Everything we know about stars comes from studying their _____.

mass
color
temperature
radiation/light
age

Answers

Light / Radiation. The light radiation defines its color. Thermal radiation for its temperature and the overall appearance of the wavelengths the star emits gives off the info from where astronomers and scientist are able to build up knowledge on the age and current state of the stars

Everything we know about stars comes from studying their radiation/light. By measuring the wavelength or frequency of light coming from objects in the universe, we can learn something about their nature.  Starts emit a range of wavelengths. The frequency of light is directly related to its color, so it follows that stars have different colors because they have different peak wavelengths of light.

Two devices with capacitances of 25 μf and 5.0 μf are each charged with separate 120 v power supplies. calculate the total energy stored in the two capacitors. your answer submit

Answers

The energy stored in a capacitor is given by
[tex]U= \frac{1}{2} CV^2[/tex]
where C is the value of the capacitance while V is the voltage difference applied to the capacitor.

Let's calculate the energy of the first capacitor:
[tex]U_1 = \frac{1}{2} (25\cdot 10^{-6}F)(120 V)=1.5 \cdot 10^{-3}J[/tex]

And now the energy of the second capacitor:
[tex]U_2 = \frac{1}{2} (5 \cdot 10^{-6}F)(120 V)=3 \cdot 10^{-4}J[/tex]

So, the total energy stored in the two capacitors is
[tex]U=U_1 +U_2 = 1.8 \cdot 10^{-3}J[/tex]

Answer:

Total energy stored in both is 0.0018J

Explanation:

Formula to calculate the total energy stored between two capacitors = 1/2CV²

Energy stored the First Capacitor = 1/2 × 25× 10⁻⁶f × (120)²

Energy stored = 0.0015J

Energy stored in the second Capacitor = 1/2 × 5× 10⁻⁶f × (120)²

Energy stored = 0.0003J

Total Energy stored = Energy stored in capacitance 1 + Energy stored in Capacitor 2

= 0.0015J+ 0.0003J

= 0.0018J

A skier is gliding down a slope at a constant speed. what energy transformation is taking place?

Answers

In this process, gravitational potential energy is converting into heat/thermal energy.

In fact, the skier starts at a certain height h, so it has gravitational potential energy equal to
[tex]U=mgh[/tex]
as he slides down, he loses this energy. However, the problem says that the speed of the skier remains constant during the motion, so this energy is not converting into kinetic energy, which remains constant. The only possibility is that a frictional force between the skier and the ice is acting on the skier. When the friction acts, the energy of the skier is converted into motion of the molecules of the ice, heating it, so into thermal energy.

When the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.

What will be the energy transformation of a skier sliding at constant speed?

We know that energy can not be created nor be destroyed but only can transfer from one form to another.

A skier is gliding down a slope at a constant speed the gravitational potential energy due to height is converting into heat because of the frictional force.

Since the skier is making a constant speed so the Potential energy will not convert into kinetic energy.

So due to the friction between the ice and the skier the energy converts in the form of heat and dissipated to the ice

Thus when the skier is gliding down a slope at a constant speed the Potential energy is transformed into heat energy.

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A 60 Watt light bulb runs for 120 seconds. How much energy does it use?

Answers

ENERGY = POWER X TIME
=60 X 120=7200KWh

Lee pushes horizontally with a force of 75 n on a 36 kg mass for 10 m across a floor. calculate the amount of work lee did. answer in units of j.

Answers

To find work, you use the equation: W = Force X Distance X Cos (0 degrees)
Following the Law of Conservation of Energy, energy cannot be destroyed nor created.

So you would do 75 N x 10m x Cos (0 degrees)= 750 J
Final answer:

The amount of work Lee did is 750 Joules.

Explanation:

Work is calculated by multiplying the force exerted on an object by the distance it is moved. In this case, Lee exerts a horizontal force of 75 N on a 36 kg mass, moving it for a distance of 10 m. Therefore, the work done by Lee can be calculated as:

Work = Force × Distance

Work = 75 N × 10 m

Work = 750 J

So, the amount of work Lee did is 750 Joules.

How was Uranus different from most other planets

Answers

Its axis is tilted on the side.
Hello,

Here is your answer:

The proper answer to this question is "Uranus is tilted 90 degrees and rotates on its side". 

If you need anymore help feel free to ask me!

Hope this helps!
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Which of these tax forms allows an employee to claim an exemption from federal income tax withholding? Why are you genetically distinct Can I please have help? A survey asked 10 boys and 10 girls how many hours they spent playing video games the previous week. The number of hours are given in the line plots. The probability that an event will occur is fraction 7 over 8. Which of these best describes the likelihood of the event occurring? Likely Certain Unlikely Impossible A 3-year-old has a harder time catching a ball, whereas a 9-year-old has an easier time catching a ball. one contributing factor for why the 9-year-old has an easier time catching the ball in contrast to the 3-year-old is _____. Which pair of angle measures represents a pair of complementary angles 35 and 5545 and 5545 and 12555 and 123 Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 28x + 585 What can be said about the slave trade? Which state of matter has a definite volume and takes the shape of its container massimo has $90 in the bank. Every time he rides the buss he spends $2.50. write and solve an equation that massimo can use to see how many times he can ride the bus. PLEASE HELP ME!!!Read the stanza from "The Bat-Poet":Curled at his breast, he sits there while the sunStripes the red westWith its last light: the chipmunkDives to his rest.Which statement does not explain how the stanza helps create meaning in the poem?A. The description of the sunset describes the coloration of the chipmunkB. The image of the Chipmunk "dive [ing] to his rest" shows that the chipmunk is sluggish and unmotivated. C. The line lengths vary, which suggests the chipmunk's movement: quickly running, then stopping and watching for danger.D. The regular meter of the lines suggests the formal and calculated nature of the chipmunk's life. Jeremy works as a member of a sales team. He never gets involved in conflicts at work. He seems to have the ability to deal with people in a way that does not offend them. Which term best describes Jeremys ability? a. honesty b. integrity c. diplomacy d. cordiality e. sociability which is better to buy?1 lb of walnuts for $3.49 or 10 oz of walnuts for $2.49 What is the expression for the calculation double the product of 8 and 3 If a 70-kg swimmer pushes off a pool wall with a force of 250 N what is her acceleration In To a Poor Old Woman, which symbolic importance or meaning do the plums take on? What is an intervention? Why is it important for a client? What do human services workers hope to prevent by staging an intervention? The 4,000 students at Tech High were surveyed about their use of text messaging. How many students said they text 50-100 times a day? A 0.366 mol sample of pcl5(g) is injected into an empty 4.45 l reaction vessel held at 250 c. calculate the concentrations of pcl5(g) and pcl3(g) at equilibrium.