what is the typical absolute threshold for vision in humans?

Answers

Answer 1

The typical absolute threshold for vision in humans is approximately 1 candle (0.1 foot-lambert) of luminance. This means that humans can typically detect the presence of a visual stimulus when its brightness reaches this level.

The conclusion is that the typical absolute threshold for vision in humans is around 1 candle (0.1 foot-lambert) of luminance. This represents the minimum amount of light required for a person to perceive a visual stimulus.

The absolute threshold refers to the lowest intensity or magnitude of a stimulus that can be detected by a person's sensory system. In the case of vision, the absolute threshold is the minimum amount of light needed for the human visual system to detect the presence of an object or stimulus. The threshold is typically measured in units of luminance, which represents the amount of light emitted or reflected by an object.

It's important to note that the absolute threshold for vision can vary among individuals and is influenced by factors such as age, visual acuity, and the presence of any visual impairments or conditions. Additionally, the absolute threshold can differ for different types of stimuli and may be affected by factors such as contrast, color, and background noise.

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Related Questions

How are all of the three health aspects linked to each other? The physical, mental and social health.

Answers

Answer:

If mental health is not good, that person will stop taking good care of their body (physical). Then they try to isolate themselves from others (social). Mental health is the biggest issue here.

Explanation:

(Long question at least 1 page)How does gender equality decrease fertility?​

Answers

Answer: A few researchers have recently theorized that the relationship between gender equality and fertility is U-shaped: higher gender equality may reduce fertility at first, but eventually encourages it.

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Need this paper written asap please help me and write it
WRITING: PRINCIPLES OF CARBOHYDRATE LOADING
Write a 300-500 word essay. Explain the purpose of carbohydrate loading. What benefit is it in terms of performance? Give examples of when carbohydrate loading is appropriate and for approximately how long. Give a sample diet for one day of carbohydrate loading; portions are not needed. The emphasis is on food choices. Include three meals and two snacks.

Answers

Explanation:

Definition

A carbohydrate-loading diet, also called a carb-loading diet, is a strategy to improve your athletic performance for endurance events by increasing the amount of fuel stored in your muscles.

Carbohydrate loading occurs when you eat a high-carbohydrate "training diet" at the same time that you scale back your activity level in the days before an event.

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Purpose

Any physical activity requires carbohydrates for fuel. For most recreational activity, your body uses its existing energy stores for fuel.

But when you engage in long, intense athletic events, your body needs extra energy to keep going. The purpose of carbohydrate loading is to give you the energy you need to complete an endurance event with less fatigue, improving your athletic performance.

Carbohydrate loading may be most beneficial if you're an endurance athlete — such as a marathon runner, swimmer, cyclist or all three — preparing for an event that will last 90 minutes or more. Other athletes generally don't need carbohydrate loading. It's usually enough to get about half of your calories from carbohydrates.

Diet details

The role of carbohydrates

Carbohydrates, also known as starches and sugars, are your body's main energy source. Complex carbohydrates include legumes, grains and starchy vegetables, such as potatoes, peas and corn. Simple carbohydrates are found mainly in fruits and milk, as well as in foods made with sugar, such as candy and other sweets.

During digestion, your body breaks down carbohydrates into sugar. The sugar enters your bloodstream, where it's then transferred to individual cells to provide energy. Sugar is stored in your liver and muscles as glycogen — your energy source.

Increase your energy storage

Your muscles normally store only small amounts of glycogen — enough to support you during recreational exercise activities. If you exercise intensely for more than 90 minutes, your muscles may run out of glycogen. At that point, fatigue might set in, and your performance may suffer.

But with carbohydrate loading, you may be able to store more energy in your muscles. This may give you the stamina to make it through longer endurance events. But, you'll still need to consume some energy sources during your event.

Carbohydrate loading

Carbohydrate loading is done the week before a high-endurance activity. One to three days before the event, increase your carbohydrate intake to about 8 to 12 grams of carbohydrate per kilogram of body weight. Cut back on foods higher in fat to compensate for the extra carbohydrate-rich foods.

Also scale back your training for three to four days before the event. The combination of eating more carbohydrates and tapering activity appear to boost muscle glycogen stores.

How many carbs you need depends on your total calorie goal as well as your sport. For most athletes, 5 to 7 grams of carbohydrate per kilogram of body weight daily is right for general training. (Note that 1 kilogram equals 2.2 pounds.) Endurance athletes may need up to 12 grams per kilogram.

please help me full out the ones i highlighted in red. i have to turn it in soon!!

Answers

Answer:

Contract

Lower

Relax

Increase

Answer:

Contract

Decrease

Relax

Increase

QUICK
Which part of a product package contains its purpose?
A. product's intended use
B. ingredients
C. warnings
D. warranty

Answers

Answer:

A

Explanation:

I need help. Please.

Answers

Answer:

with all??

Explanation:

2. amino acids are small molecules that are the building blocks of proteins.

3. in short- the food you eat. The best sources of essential amino acids are animal proteins like meat, eggs and poultry. When you eat protein, it's broken down into amino acids.

4. Quinoa, Tofu, Buckwheat, Hemp seeds, Chia seeds

5. plant foods

6. Legumes,  Nuts., Seeds, Whole grains, Vegetables

7. Simple carbohydrates are a shorter type of carb. they're not very nutritional.

8. table sugar and syrups. processed foods.

9. fruits (strawberry, apple) sugar cane, fruit juice.

10 Complex carbohydrates contain longer chains of sugar molecules

11 Buckwheat, Brown rice, Corn, Wheat, Barley, Oats, Sorghum, Quinoa

12.

How does ecosystem affect in our daily life? illustrate in your words​

Answers

Answer:

Explanation:

ecosystem are vital for human welfare and survival, they provide us our essential products and benefits.

Ecosystem services are the benefits that people obtain from ecosystems. Ecosystem services are indispensable to the wellbeing of all people, everywhere in the world. They include provisioning, regulating, and cultural services that directly affect people, and supporting services needed to maintain the other services =^=

Which benefit of playing with others helps me meet new friends and become a team player?

Answers

Answer:

Companionship

Explanation:

maybe

O !!!
9. Your mother likes to buy fresh vegetables. Now that she has a new job, she doesn't
have time to wash, peel, slice, and cook them. Your family doesn't like canned
vegetables. Your mother is afraid she will only have time to serve vegetables on the
weekends. What suggestions could you give her?

Answers

make someone else in the house do it
Just give ipw a call when you get a

Explain why the crossing of 2 hybrid parents only results in a 25% percent chance of having a child with blue eyes according to a punnett square.

Answers

Answer:

The crossing of two hybrid parents results in only a 25% chance of having a child with blue eyes, because the alleles responsible for blue eyes are resective and will only appear in resessive hom0zygosis.

Explanation:

Blue eyes are determined by recessive alleles, which will be represented by the letter "b" in the punnett square. As you may already know, recessive alleles are only expressed in the presence of another recessive allele, in a system called recessive hom0zygosis (bb). In a cross between hybrid parents, that is, with heterozygous (Bb) alleles, the chances of their children having blue eyes are very low and represent a 25% probability, as can be seen in the punnett squad shown below.

Select the principles and aspects of communication that contribute to effective patient care. Check all of the boxes that apply.

good speaking skills

good listening skills

good drawing skills

good reading and writing skills

displaying courtesy and respect

good math skills

Answers

Good speaking skills
Good listening skills
Good reading and writing skills
Displaying courtesy and respect
All of them except the last one

write an essay about physical fitness assessment​

Answers

Answer:

Physical fitness!!!

Explanation:

Physical fitness is to the human body what fine tuning is to an engine. It enables us to perform up to our potential. Fitness can be described as a condition that helps us look, feel and do our best. More specifically, it is the "ability of the human body to function with vigor and alertness, without undue fatigue, and with ample energy to engage in leisure activities. (Physical)."

             Physical fitness involves the performance of the heart and lungs, and the muscles of the body. And, since what we do with our bodies also affects what we can do with our minds, fitness influences to some degree qualities such as mental alertness and emotional stability.

             Physical fitness is most easily understood by examining the four basic parts: Cardiorespiratory Endurance, muscular strength, muscular endurance and flexibility. Cardiorespiratory Endurance is the ability to deliver oxygen and nutrients to tissues and to remove wastes over sustained periods of time. Long runs and swims are among the methods employed in measuring this component. Muscular strength is the ability of a muscle to exert force for a brief period of time. Upper body strength, for example, can be measured by various weight-lifting exercises. Muscular endurance is the ability of a muscle, or group of muscles, to sustain repeated contractions or to continue applying force against a fixed object. Pushups are often used to test endurance of arm and shoulder muscles. And flexibility is the ability to move joints and use muscles through their full range of motion. The sit and reach is a good measure of flexibility of the lower back and back of the upper legs.

             Physical fitness and the decision to carry out a physical fitness program should not be taken lightly. It requires a lifelong commitment of time and effort. Exercise must become one of those things that is done without question, like bathing and brushing your teeth. Patience is essential.

Hope it helped!!!

Help I’ll give Brainlyest

Answers

Answer: double

Explanation:

The answer is double

what is an organ-system? why is it important

Answers

Answer:

An organ system is a group of organs that act together to carry out complex, interrelated functions, with each organ focusing on a subset of the task. ... One of the most important functions of organ systems is to provide cells with oxygen and nutrients and to remove toxic waste products such as carbon dioxide.

Hope this helps!!!!!!!

If you think a teacher is being tough on you, and you then decide to believe that he or she is trying to push you to do better because you have potential, you have engaged in

Answers

Answer:

??/

Explanation:

If you think a teacher is being tough on you, and you then decide to believe that he or she is trying to push you to do better because you have potential, you have engaged in cooperative and learning mode to achieve good grades.

What is cooperative learning?

Encourage cooperation learning and mutual support by getting learners to study collaboratively. When learners study in a group, they share their ideas and knowledge to complete an assignment. Support from the peer group also helps to boost learnersconfidence.

Unlike learning in isolation where discouragement or a sense of hopelessness may set in, learning becomes more enjoyable when teacher and friends are able to help or motivate one another.

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Match the acts with their functions.
JOLI
OHESPR
CED
a federal grant program that provides economic
assistance to low-income individuals and
families to help make them self-sufficient
a federal grant program that provides financial
support to nonprofit organizations
provides guidance in being ready and responsive
during and after federally declared disasters

Answers

Answer:

first: JOLI - economic assistance

second: CED - financial support

third - ready and responsive

(these are the keywords)

Answer:

(a federal grant program that provides economic

assistance to low-income individuals and

families to help make them self-sufficient) = CED

(a federal grant program that provides financial

support to nonprofit organizations) = JOLI

(provides guidance in being ready and responsive

during and after federally declared disasters) = OHESPR

Explanation:

I did it on Plato and I got it right

This is for my PE class

Answers

Answer:

number 1:B service

number 2: A points

1- spike
2- points i have to add more words to answer so yeah

Take the number from the answer above (N). We will now find the Lower end of the THR. Follow this math equation. ("N" x 0.6) =? Once you find this number, now you will add your (RHR). What number are you left with? This is your lower Target Heart Rate.

Answers

Answer:

See Explanation

Explanation:

The question is straightforward; however, some important details are missing.

The missing details are: N and RHR

To solve this question, we will make assumptions for N and RHR

Represent the target heart rate with THR.

So, the steps are:

Step 1: N * 0.6 = (1)

Step 2: (1) + RHR

Step 3: THR = 2

Hence, the equation to solve THR is:

[tex]THR = N * 0.6+RHR[/tex]

Assume the values of N and RHR are: 50 and 60 respectively

The equation becomes

[tex]THR = 50 * 0.6+60[/tex]

[tex]THR = 30+60[/tex]

[tex]THR = 90[/tex]

Hence, the target heart rate for N = 50 and RHR = 60 is: 90


1. In the list of exercises above, which 3 activities would MOST be considered to work on cardiovascular endurance?

Answers

Answer:

jog in place

jumping jacks

high knees

Jog in place
Jumping jacks
High knees

Those are all cardio hope this helps

Food that is cooked properly can no longer be contaminated.
A serving portion is usually the equivalent to one serving per package or container.

Answers

Both statements are false.

Answer:

false

Explanation:

its false

how did you choose the wodr/s without knowing its definition​

Answers

Answer:

what's the question?

Explanation:

What is wodr/s?

analyzing speed, agility, reaction time

1. stealing a base in a baseball game

a: speed
b: reaction time
c: agility

2. dribbling a soccer ball down the field

a: speed
b: reaction time
c: agility

3. hitting a fastball

a: speed
b: reaction time
c: agility

4. slalom skiing through gates in a downhill slalom ski race

a: speed
b: reaction time
c: agility

5. getting down low to keep a hard downward hit ball (spike) in volleyball from hitting the floor

a: speed
b: reaction time
c: agility

i know it's a lot, i can't focus or think anything. i'm struggling a lot, so this is all i have to ask for. thank you <3

Answers

Answer:

It’s c

Explanation:

Always trying to be better than those around, even actively trying to knock others down, is considered:

Answers

Answer:

that can be both bullying and being cocky or having a big ego and low regard for others

Explanation:

I know I keep making sad stuff now...but to be honest... I sorta like it

When you head hangs low
but your not sure why
when you get this overbearing feeling of sadness
but nothing bad has happened
when you feel like you did something wrong
and you think
"oh that's why I don't have friends"
When people make fun
of the way you look
or talk
or act
but all you can do is cry
and they ask
"what's wrong with you"
"you have everything...why be sad"
but you don't know how to respond because YOU don't even know
and your parent tell you "oh your fine suck it up"
but you don't know how to
and feel like your alone
in a world
full
of sorrows

Answers

Answer:

Explanation:

deep

please give brainlest need one

Select the best forms of patient information from the list below. (Check all of the boxes that apply)

reference books that can be accessed only in a medical library

scientific journal articles written by and for doctors in a given medical specialty

pamphlets and handouts designed for patients

hotlines that offer help with a specific health condition

links to websites with reputable information

the dates, times, and locations of a nearby support group

Answers

Answer:

a, and c

Explanation:

a & c because they are giving you more information about that patient

Answer:

C, D , E, F or 3   4   5   6

Explanation:

took on edg

True or False: Stretching after an intense workout can lessen the strain on your muscles.

Answers

true, you dont want to overdo anything, take it steps at a time

Most Information Technology careers require workers to perform their jobs in

a home office.
a business office.
a secure office.
an off-site office.

Answers

C.) a secure office.

Answer: B) a business office

Explanation:

Which Two strategies can help reduce Richard’s stress?

Answers

Answer:

556 Diathesis-stress model: a person may be predisposed for a psychological disease ... Describe how exposure therapy can help reduce your fear of spiders, and distinguish ... Discuss at least two advantages and two disadvantages. ... Within the context of his job, describe some aspects of Richard's behavior

Explanation:

Answer:

the first one and the fourth one.

Scott eats an average of 21,000 calories each week. He uses about 17,500 calories each week.

Is Scott in a state of energy balance? Yes or No

How many extra calories does Scott eat each week? ___________

If Scott continued his pattern, how much weight might he gain each week? ________ pounds

Answers

Answer:

a. No b. 3500 c. 1-2 pounds per week

Explanation:

If we use the calorie recommendation of 2000 calories a day as a gauge, we find that he eats on average 3000 calories a day. If you eat 500-1000 calories more than what you should be eating each day, every week, you will gain 1-2 pounds per week

the extra calories does Scott eat each week 3500, If Scott continued his pattern,  1-2 pounds per week weight might he gain.

what is calorie ?

Calories are the basic units of energy  which are provided from food,  calorie counts can be counted on food items, and wearables like the best fitness.

some foods, like fatty, fried, or processed foods, tend to show more calories. Other foods, such as fresh fruit and vegetables, tend to have fewer calories.

some healthy fruits and vegetables releases  more calories, while low-calorie foods, such as diet soda, don’t provide any nutritional value.

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Question 8 of 20 Doug would like to reduce his risk of diabetes and protect his joints. Which of these behaviors would most help him reach this health goal? O A. Using recreational drugs in moderation B. Maintaining a healthy weight O C. Getting less sleep D. Cutting down on exercise​

Answers

B. Maintaining a healthy weight. Less weight = less stress on joints

Answer:

An apple, potato, and onion all taste the same if you eat them with your nose plugged

Explanation:

Other Questions
what was the location of the attack that caused the United States to enter world war 12 A drug or other agent that induces defects during embryonic development is known as a:_______ a) carcinogen b) teratogen c) syncytia d) capsomere Jean estimates that her friend complete a new level of a game on the first try 20% of the time. she conducts a simulation to predict how manytimes out of 80 her friend would complete a new level on the first try. jin uses a random number generator. every digit that is eight or nine representatives complete in the level. what is the problem ability that her friend completes a new level on the first try written as a percent Which function has a vertex at the origin?O f(x) = (x+4)Of(x) = x(x-4)Of(x)=(x-4)(x + 4)Of(x) = -x Who was the 39th President of the United States 2. The National Institute of Health reports that about 85 percent of children born to Deaf parents are hearing. Often Children of Deaf Adults (CODA) have been exposed to (and learn) sign language from an early age. How do you think the life of a hearing CODA differs from that of a deaf child born into a hearing family? A board of directors consists of fourteen men and six women. A four-member search committee is randomly chosen to recommend a new company president. What is the probability that all four members of the search committee will be women The processes of decoding nonverbal communications and using schemas during impression formation are both examples of __________ processes. A high compression ratio may result in; 10 points + BRAINEST An integrated transcriptomic and epigenomic analysis identifies CD44 gene as a potential biomarker for weight loss within an energy-restricted program FAST PLEASE PLEASERead the following selection from Act II of Romeo and Juliet. What does the line in bold most likely mean?JULIETThe clock struck nine when I did send the nurse;In half an hour she promised to return.Perchance she cannot meet him: that's not so.O, she is lame! love's heralds should be thoughts,Which ten times faster glide than the sun's beams,Driving back shadows over louring hills:Therefore do nimble-pinion'd doves draw love,And therefore hath the wind-swift Cupid wings.Now is the sun upon the highmost hillOf this day's journey, and from nine till twelveIs three long hours, yet she is not come.Had she affections and warm youthful blood,She would be as swift in motion as a ball;My words would bandy her to my sweet love,And his to me:But old folks, many feign as they were dead;Unwieldy, slow, heavy and pale as lea From nine a.m. to noon is three hours, but the Nurse has not returned. Juliet has done three hours' worth of work, but she is still not tired. The Nurse has not sent word back to Juliet in nearly three full days. Romeo lied when he told Juliet that he would be ready at nine a.m. A river flows at 2m/s . Juan's boat can travel twice as fast down the river as it can go up the river. how fast the boat go in still water? Write an expression for the x-component of acceleration of the given velocity field as a function of x, y, z, and/or t. what is the coefficient of (3y^2 + 9)5 Even though we all know that junk food is not healthy, it can be difficult to resist it, especially when we are busy. Do you think a person should never eat junk food? How might a persons health be affected by the amount of junk food they eat? What is the relationship between nutrition and wellness? A standard number die is tossed. Find P(3 or odd). Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods? Ionization energy is the energy required to remove an electron from an atom in the gas phase. The ionization energy of gold is 890.1 kJ/mol. Calculate the maximum wavelength of light that will ionize gold. Anthropological perspectives on participation in CBPR: Insights from the water project, Maras, Peru.