joe now shifts his focus from the tree to the squirrel. to do this, the ciliary muscles in his eyes must have the curvature of the lens, resulting in a(n) focal length for the cornea-lens system. note that curvature is different from radius of curvature. joe now shifts his focus from the tree to the squirrel. to do this, the ciliary muscles in his eyes must have the curvature of the lens, resulting in a(n) focal length for the cornea-lens system. note that curvature is different from radius of curvature. increased / increased increased / decreased decreased / increased decreased / decreased
Answers
When the ciliary muscles contract, they increase the curvature of the lens, which leads to a shorter focal length. This allows Joe to focus on objects that are closer to him, such as the squirrel.
Therefore, the correct answer is "increased / decreased."
When Joe shifts his focus from the tree to the squirrel, the ciliary muscles in his eyes contract or relax to adjust the curvature of the lens. The ciliary muscles control the shape of the lens, allowing it to become more or less curved. This change in lens curvature enables the eye to adjust its focal length.
To focus on a nearby object like the squirrel, the ciliary muscles contract, which increases the curvature of the lens. This increased curvature results in a shorter focal length for the cornea-lens system. The shorter focal length allows the incoming light rays from the squirrel to converge and form a focused image on the retina.
On the other hand, when Joe shifts his focus back to the tree in the distance, the ciliary muscles relax. This relaxation reduces the curvature of the lens, resulting in a longer focal length for the cornea-lens system. The longer focal length enables the eye to focus on objects that are farther away, such as the distant tree.
Therefore, the correct answer to the question is "increased / decreased" for Joe's shift in focus from the tree to the squirrel.
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Related Questions
What factors led to the decline of the Spanish and Portugeuse based on their height of power in the 1450 to 1750 time period?
Answers
The decline of the Spanish and Portuguese empires between 1450 and 1750 can be attributed to a combination of economic decline, political instability, military defeats, and religious and cultural factors. These factors weakened their global influence, ultimately leading to their downfall during this time period.
Several factors led to the decline of the Spanish and Portuguese empires between 1450 and 1750, which were once at the height of their power during this time period.
Firstly, economic decline played a major role in their downfall. The Spanish and Portuguese economies were heavily dependent on their colonies for resources, such as gold, silver, and agricultural products.
However, as other European nations started to establish their own colonies, the demand for goods from the Spanish and Portuguese colonies decreased. This led to a decrease in their trade revenue, and in turn, weakened their economies.
Secondly, political instability contributed to their decline. Both empires faced various internal conflicts, such as the War of Spanish Succession (1701-1714) and the Portuguese Restoration War (1640-1668). These wars drained their resources and weakened their central governments, making it difficult for them to maintain control over their vast territories.
Thirdly, military defeats and the rise of other European powers also played a significant role in the decline of the Spanish and Portuguese empires. For example, Spain suffered several military defeats against England, the Dutch Republic, and France, which led to the loss of some of their territories.
Similarly, Portugal lost its colonies in Asia to the Dutch and British, which further weakened their global influence.
Lastly, the religious and cultural factors cannot be ignored. The Spanish and Portuguese empires were strong supporters of Catholicism, which often led to conflicts with Protestant nations.
The aggressive spread of their religion and cultural practices in their colonies also created tensions, leading to resistance and uprisings among the local populations.
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Which of the following statements is accurate when considering the role of cognition in shaping behavior? A. Cognition helps determine if a consequence is influential enough to control behavior. B. Cognition will most likely decrease the chance for classical conditioning to work. C. One’s cognitive processes are irrelevant when it comes to shaping behavior. D. One’s cognitive processes only work in shaping behavior when a particular consequence is desired. Please select the best answer from the choices provided A B C D
Answers
Answer: the answer is A.
Explanation:
brainliest please?
Answer:
A.
Cognition helps determine if a consequence is influential enough to control behavior.
Explanation:
This is right on edg. 2020
Which of the following quantities are vectors?
Distance
Displacement
Velocity
Speed
Force
Fores
O
Height
Acceleration
Answers
Answer:
Displacement
Velocity
Acceleration are the vector quantity....
Explanation:
hope this was helpfull....
How do you calculate density altitude?
Answers
Density altitude is a measurement of air density used to estimate aeroplane performance. It is determined by combining temperature, pressure, and humidity. The density altitude formula is as follows:
Pressure altitude + [120 x (OAT - ISA temperature)] = density altitude
In the above formula:
The height in the standard atmosphere where the atmospheric pressure equals the measured pressure is referred to as pressure altitude.
OAT is the temperature of the outside air in degrees Celsius.
The International Standard Atmosphere (ISA) temperature is the standard temperature for a certain altitude (ISA).
The altitude in feet above sea level at which the air density is equal to the air density at the actual altitude, temperature, and pressure is the outcome of this computation. A high density altitude indicates that the air is less dense, which can reduce aircraft performance, whereas a low density altitude indicates that the air is denser, which can improve aircraft performance.
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What do you mean by Tribology? Explain its significance in our daily life 2. Explain the role played by friction and wear in a tribological system 3. How do you define Wear? How it affects the properties of a surface?
Answers
(2.)Tribology is particularly important in today's world because so much energy is lost to friction in mechanical components. To use less energy, we need to minimize the amount that is wasted. Significant energy is lost due to friction in sliding interfaces.
(3.) Wear can be defined as an extremely short sliding motion and is executed within a short time interval.
(Idk how it effects the properties of surface sorry )
You can tell the direction of propagation of the initiation by the direction of Group of answer choices a. the wind b. branching c. cloud motion d. tall towers
Answers
You can tell the direction of propagation of the initiation by the direction of cloud motion. Correct answer: letter C.
Cloud motion is the speed and direction of the clouds in the sky, which can indicate the direction of the wind and the propagation of the initiation.
This is especially important for forecasting storms and other weather events, as the direction of wind can help to predict the direction of the storm's movement. Additionally, it can also be used to help predict the intensity of the storm, as the speed of the wind can help to determine the strength of the storm.
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voltmeter is connected in parallel with loads why?
Answers
Answer:A Voltmeter has very high resistance to ensure that it's connection do not alter flow of current in the circuit. Now if it is connected in series then no current will be there in the circuit due to it's high resistance. Hence it is connected in parallel to the load across which potential difference is to be measured.
Explanation:
Convert 2000 mg to g
Answers
Answer: Your answer is 2 grams!
Explanation: Hope this helps!
Answer:
2000 mg = 2 grams
Explanation:
Have a great rest of your day
Sincerely, the one and only
-Mr. Universe
You place a drop of blue food coloring in a cup of cold water and another drop of food coloring in a cup of hot water. Which observation is correct and why? A The food coloring in the hot water will spread more slowly than in the cold water because water molecules move more slowly when hot. B The food coloring in the hot water will spread more quickly than in the cold water because water molecules move more quickly when hot. C The food coloring in the cold water will spread more quickly than in the hot water because water molecules move more quickly when cold. D The food coloring in the cold water will spread at the same rate at the food coloring in the hot water because water molecules at any temperature move at the same rate.
Answers
Answer:
B food coloring will move quicker in hot water because the molecules move faster when they are hot
Explanation:
SCIENCE! aaaaand my physics text book
Option B is correct: The food coloring in the hot water will spread more quickly than in the cold water because water molecules move more quickly when hot since they have more kinetic energy.
Kinetic energy of the molecules:According to the question, we place a drop of blue food coloring in a cup of cold water and another drop of food coloring in a cup of hot water and then observe the spreading of the blue color in both the cups.
Option B will be correct because the kinetic energy of the molecules of a gas or a liquid is directly proportional to the absolute temperature of the gas or the liquid.
High kinetic energy means that the molecules will have higher velocity, which will make it easier for any solvent to dissolve in water since it will spread faster.
So the cup which has water at a higher temperature will have a faster spread of the food coloring.
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Look at the diagram below. It shows a metal. Which of the particles in the metal, X or Y, is free to move and transfer energy?
Answers
Metals' complex structures account for their high melting and boiling temperatures as well as their conductivity. A metal's characteristics can be changed by adding another substance to it to create an alloy.
What metal possesses the maximum conductivity?Of all the metals, silver has the highest electrical conductivity. In actuality, silver is the standard by which conductivity in all other metals is measured. Silver ranks 100 on a scale of 0 to 100, followed by copper at 97 and gold at 76.
Why do metals conduct electricity?Due to the fact that the atoms in metals form a matrix through which outside electrons can easily travel, metals are efficient conductors of both electricity and heat. They produce a sea of electrons surrounding the positive nuclei of the interacting metal ions rather than orbiting their individual atoms.
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A 6.8 kg cannon ball leaves a canon with a speed of 188 m/s. Find the average net force applied to the ball if the cannon muzzle is 4.2 m long.
i want the answer with the steps
Answers
Answer:
its not long dummy, its your imagination
Explanation:
How can your neighborhood be improved?.
Answers
Trim any bushes or trees on your property that provide convenient hiding places too.
Prune where trees and bushes block your view of your front door or obscure your view out of your home's windows. Keep your porch visible and make sure your home looks like it has the neighborhood in mind. Keeping our neighborhoods clean is important because unclean neighborhoods attract germs and diseases.
Our neighbors get sick when they aren't. Also, it's better to live in a clean neighborhood than a dirty one. The home and neighborhood in which you grow up influence your health and longevity. A safe tidy stable and affordable home also affect a child's academic performance.
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An Object with a mass o 5.13kg placed on top of a spring compresses it by 0.25m (a) what is the force constant of the spring (b) How high will this object go when the spring releases its energy?
Answers
The force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m
The spring constant is the force needed to stretch or compress a spring, divided by the compressive or expansive distance. It's used to determine stability or instability in the spring, and therefore the system it's intended for. we know,
F = kx
Therefore,
k = F/x
We also know that the force being exerted on the spring is equal to the mass of the object. Hence, F = mg = 5.13 * 9.8 N = 50.174 N and we know compression due to the mass is 0.25m. Therefore,
K = 50.174/0.25 N/m
K = 200.696 N/m
Therefore, The Spring Constant is 200.696 N/m
On release, the spring potential energy gets converted to kinetic energy. Hence, on release, the height attained by the object is given by:
h = \(1/2 kx^{2}\)
We know that k=200.696 N/m and x=0.25 m. Therefore the height is:
h = \(1/2 (200.696 N/m)(0.25 m)^{2}\)
h = 2.5087 m
Therefore, the force constant of the spring is 200.696 N/m & The height the object achieves when the spring releases its energy is 2.5087 m
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how can you convert 54 grams to kilograms
Answers
Answer:
0.054 kilograms
Explanation:
divide 54 by 1000
so, 54/1000=0.054 kilograms.
Oxygen makes up more than 90 percent of the volume of the Earth's crust. Is oxygen found as a solid, liquid, or gas?
Answers
Answer:
Oxygen is an element that can be a solid, liquid or gas depending on its temperature and pressure. In the atmosphere it is found as a gas, more specifically, a diatomic gas. This means that two oxygen atoms are connected together in a covalent double bond.
Describe how transferring energy into the container affected the speed of the marbles.
Answers
The speed changes as a result of the energy being transferred into a container filled with magnetic marbles and the kinetic energy produced by the container's gentle shaking. Phase shifts will result from this.
The energy of a system changes together with each phase change it undergoes. These involve kinetic energy transmission to a system. Endothermic reactions occur when a condition changes from being more ordered to being less ordered. Exothermic reactions are always involved in transitions from one state to another that is more organised.
When a substance transforms from one state to another, a phase change occurs in the system. When the system receives enough energy or loses enough energy, these changes take place. Phase changes also happen when the system's pressure is altered.
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Complete Question:
Describe how does transferring energy into a container of magnetic marbles affect the speed by shaking the container gently?
A child is sitting on a merry-go-round 2.8 m from the
center. If the tangential velocity of the ride is 0.89 m/s,
what is the centripetal acceleration of the dragonfly?
A. 0.11 m/s2
C. 0.32 m/s2
B. 0.28 m/s2
D. 2.2 m/s2
Answers
Answer:
b
Explanation:
a=v2/r
=0.89^2/2.8
=0.2828...
=0.28
The centripetal acceleration of the child sitting on a merry-go-round 2.8 m from the center will be 0.283 m/s².
What is centripetal acceleration?
Centripetal acceleration is the constant change in velocity necessary for an object to maintain a circular path. We can write the formula for centripetal acceleration as -
a[C] = v[T]²/r
where -
v[T] is tangential velocity
r is radius
Given is a child is sitting on a merry-go-round 2.8 m from the center and the tangential velocity of the ride is 0.89 m/s.
We can write -
Radius [r] = 2.8 m
Tangential velocity = v[T] = 0.89 m/s.
Using the formula for centripetal acceleration -
a[C] = v[T]²/r
a[C] = (0.89 x 0.89)/2.8
a[C] = 0.283 m/s²
Therefore, the centripetal acceleration of the child sitting on a merry-go-round 2.8 m from the center will be 0.283 m/s².
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PLEASE HELP MEEEE. A girl throws a ball 15 m into the air. The ball has the maximum potential energy at a height of
a. O m.
b. 5 m.
c. 10 m.
d. 15 m.
Answers
Answer: 15m..............
How
did the solar system begin? ( use complete sentences ) will mark b
Answers
At the center, gravity pulled more and more material in. Eventually the pressure in the core was so great that hydrogen atoms began to combine and form helium, releasing a tremendous amount of energy. With that, our Sun was born, and it eventually amassed more than 99 percent of the available matter.
Matter farther out in the disk was also clumping together. These clumps smashed into one another, forming larger and larger objects. Some of them grew big enough for their gravity to shape them into spheres, becoming planets, dwarf planets and large moons. In other cases, planets did not form: the asteroid belt is made of bits and pieces of the early solar system that could never quite come together into a planet. Other smaller leftover pieces became asteroids, comets, meteoroids, and small, irregular moons.
The manager of a Canadian pension fund knows that the fund must make a lump-sum payment of C$5 million 10 years from now. She wants to invest an amount today in a GIC so that it will grow to the required amount. The current interest rate on GICs is 6 percent a year, compounded monthly. How much should she invest today in the GIC
Answers
The amount manager should invest today in GIC to have C$5 million in 10 years is C$2,775,633.
To find the amount the manager should invest today in a GIC, we can use the future value formula:
FV = PV(1 + r/n)^(nt)
Where FV is the future value, PV is the present value, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years.
In this case, FV = C$5 million, r = 6% (0.06), n = 12 (compounded monthly), and t = 10 years. We need to solve for PV.
Rearrange the formula to solve for PV:
PV = FV / (1 + r/n)^(nt)
Now, plug in the given values:
PV = 5,000,000 / (1 + 0.06/12)^(12*10)
PV ≈ C$2,775,633
The manager should invest approximately C$2,775,633 in the GIC today to have C$5 million in 10 years.
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a plane sheet of length l and width w is made of an insulating material. this sheet holds a net charge of q, which is distributed uniformly over the area of the sheet. what is the surface charge density, , of this charged sheet?
Answers
The surface charge density of the charged sheet is σ = q/(l*w).
The surface charge density of a charged sheet is defined as the amount of charge per unit area of the sheet. It can be calculated using the formula:
σ = Q/A
Where σ is the surface charge density, Q is the net charge of the sheet, and A is the area of the sheet.
Given that the sheet has a length l and width w, the area of the sheet can be calculated as:
A = l*w
Substituting this into the formula for surface charge density gives:
σ = Q/(l*w)
Given that the net charge of the sheet is q, we can substitute this into the formula to find the surface charge density:
σ = q/(l*w)
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Apply the 5 porter forces to Suncor Energy but specifically focus on:
Please analyze and apply Suncor:
Determine the underlying factors of,
and the total strength of, each force.
• Assess the overall industry structure
and attractiveness.
• Assess recent and expected future
changes for each force.
1. Bargaining Power of Suppliers
The suppliers are concentrated (few of
them).
• Suppliers provide a specialist or rare
input.
• Switching costs are high (it is disruptive
or expensive to change suppliers).
• Suppliers can integrate forwards (e.g.
low-cost airlines have cut out the use of
travel agents).
2. Rivalry in the Industry
Competitor concentration and balance.
• Industry growth rate.
• High fixed costs.
• High exit barriers.
• Low differentiation.
Answers
The bargaining power of suppliers for Suncor Energy is influenced by factors such as supplier concentration, specialized inputs, high switching costs, and the potential for suppliers to integrate forwards. Rivalry in the industry is affected by competitor concentration, industry growth rate, high fixed costs, high exit barriers, and low differentiation.
1. Bargaining Power of Suppliers:
The bargaining power of suppliers for Suncor Energy can be analyzed based on several factors. If the suppliers in the industry are concentrated and there are only a few of them, it may give them more power to dictate terms and conditions. Additionally, if the suppliers provide specialized inputs that are rare or unique, it can increase their bargaining power. High switching costs, where it is disruptive or expensive for Suncor Energy to change suppliers, can also strengthen the suppliers' position. Furthermore, if suppliers have the ability to integrate forwards, such as low-cost airlines cutting out the use of travel agents, it can further impact the bargaining power.
2. Rivalry in the Industry:
The level of rivalry in the industry can be assessed by considering various factors. Competitor concentration and balance play a role in determining the intensity of competition. If there are a few dominant players or a balanced market share distribution, it can impact the competitive dynamics. The industry growth rate is also important as a high growth rate can lead to more intense rivalry. High fixed costs, such as those associated with infrastructure or equipment, can create barriers to entry and affect the competitive landscape. Similarly, high exit barriers, which make it difficult for companies to leave the industry, can contribute to intense rivalry. Finally, low differentiation among competitors can lead to price-based competition and increased rivalry.
By analyzing these factors, Suncor Energy can gain insights into the overall industry structure and attractiveness. Additionally, assessing recent and expected future changes for each force can help anticipate shifts in the competitive landscape and make informed strategic decisions.
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Calculate the force of an object shot in the air with a mass of 2 kg and an acceleration of 9.81 m/s2.
Answers
Answer:
Force = 19.62 Newton
Explanation:
Given the following data;
Mass = 2kg
Acceleration = 9.81 m/s²
To find the force;
Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
Force = mass * acceleration
Substituting into the formula, we have;
Force = 2 * 9.81
Force = 19.62 Newton
derp derp derp chicken strips don't answer lol i just want to be here.
Answers
Answer:
ok lol
Explanation:
ok but I will still answer
Answer:daddy
Explanation:
Suppose that you are standing on a cardboard carton that just barely supports you. what would happen to the cardboard box if you jumped up in the air? it will
Answers
The cardboard box will collapse when you jumped up in the air.
When they are standing over the cardboard. Cardboard is supporting our weight which results in the whole system is in equilibrium position.
In the equilibrium condition the box will not collapse. But as soon as you want to jump in the upward direction then a force has to be applied. in the upward direction there will be an acceleration according to the Newton second law.
As we know, Newton's third law states that every action has an equal and opposite reaction.
So to push the body upward, we will push the cardboard in the downward direction. With equal force by which we have to make a jump.
Due to this jump the systems equilibrium will not maintained and the box will collapse.
The cardboard box will collapse when you jumped up in the air.
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Oil having a density of 924 kg/m³ floats on
water. A rectangular block of wood 3.18 cm
high and with a density of 965 kg/m³ floats
partly in the oil and partly in the water. The
oil completely covers the block.
How far below the interface between the
two liquids is the bottom of the block?
Answer in units of m.
Answers
Explanation:
The bottom of the block is 0.1365 meters (or 13.65 centimeters) below the interface between the two liquids.
A compounded reverted gear train is to be designed as a step up gear to increase the speed by 48 times. With pressure angle of 20
∘
, specify suitable numbers of teeth to minimize gearbox size and avoid interference problem in the teeth. Sketch the designed compounded reverted gear system, indicating the gear positions and their numbers of teeth.
Answers
The first gear set (12-72) provides a speed increase of 6, and the second gear set (8-64) further increases the speed by a factor of 8, resulting in an overall speed increase of 48.
To design a compounded reverted gear train as a step-up gear with a speed increase of 48 times while minimizing the gearbox size and avoiding interference problems, we need to carefully select the numbers of teeth for the gears.
The compounded reverted gear train consists of two sets of gears: the first set is the compound gear train, and the second set is the reverted gear train. The compound gear train is used to achieve a moderate speed increase, and the reverted gear train further amplifies the speed.
To determine suitable numbers of teeth, we can start by considering the speed increase ratio of 48. This ratio can be achieved by breaking it down into smaller ratios for the compound and reverted gear sets. For example, we can choose a speed increase ratio of 6 in the compound gear train and a ratio of 8 in the reverted gear train.
Next, we need to select suitable numbers of teeth for each gear to avoid interference problems and ensure smooth operation. To minimize gearbox size, we aim to keep the gears as small as possible. One approach is to use gears with a small number of teeth, which can help reduce their size.
For the compound gear train, we can select gears with, for example, 12 and 72 teeth. This gives a speed increase ratio of 6. For the reverted gear train, we can choose gears with 8 and 64 teeth, resulting in a speed increase ratio of 8.
The sketch of the designed compounded reverted gear system would show the gear positions and their numbers of teeth as follows:
---- 12 teeth ----
/ \
--- 72 teeth 8 teeth ---
\ /
---- 64 teeth ----
In this configuration, the first gear set (12-72) provides a speed increase of 6, and the second gear set (8-64) further increases the speed by a factor of 8, resulting in an overall speed increase of 48. By carefully selecting the numbers of teeth and the gear ratios, we can achieve the desired speed increase while minimizing the size of the gearbox and avoiding interference problems between the gear teeth.
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A pinball bangs against a bumper of a pinball machine with a speed of 0.9 m/s. If the ball has a mass of 0.056 kg, what is the ball's kinetic energy?
Answers
It would be 2.356
i dont need answers, i just want to know what you guys think....just anything
if energy can't be created or destroyed, then it means there must have been a certain amount of energy when the universe was born, right? Is it possible to measure how much energy there was in the beginning?
Answers
Answer:
I am not sure really.
Explanation:
I just don't know
What does the blackboard do when white light falls on it?