Which statement best characterizes the relationship between the elasticity of demand, price, and total revenue?.

Answer:Hydrogen fusion in a shell outside the core generates enough thermal pressure to push the upper layers outward.

Explanation:

4. B They have observed the very rapid orbits of stars close to the area.

5. A. 95%

im doing the test right now

Hey there!

Based on the info this planet is likely to be located near the sun. If you would like to be exact it would be between Mercury and Venus. This is because it’s orbital period is half a year, Venus is about 3/4 of a year, and Mercury is about 1/3 of a year. Hopefully this helps! Good luck!

Given:

The charge is q1 = 9.4 nC

The charge q2 = -2.31 nC

The distance between them is r = 4.94 cm

To find the electric field strength at the midpoint between two charges.

Explanation:

The electric field strength at the midpoint will be the sum of electric field strength due to q1 and q2.

The electric field strength can be calculated by the formula

Here, k is the electrostatic constant whose value is

The electric field strength due to the charge q1 is

The electric field strength due to the charge q2 is

The electric field strength at the midpoint will be

Thus, the electric field strength at the midpoint between the two charges is 173000 V/m

When you double the distance from a sound source, the intensity of the sound reduces to one-fourth its original value.

The increase in length of a copper wire with a 200 kg load hung on it is approximately 0.50 mm.

The length of a steel bridge span will increase by approximately 6 cm when it undergoes a temperature change from winter to summer.

The heat required to raise the temperature of a 4.0 kg aluminum block from 10°C to 54°C is 173,360 J.

The intensity of the sound reduces to one-fourth its original value.

The intensity of sound is inversely proportional to the square of the distance from the source. When you double the distance, the intensity decreases by a factor of 1/4 (1/2)², resulting in one-fourth its original value.

To calculate the increase in length, we can use Hooke's law:

ΔL = (F * L) / (A * Y)

where ΔL is the change in length, F is the force applied, L is the original length, A is the cross-sectional area, and Y is the Young's modulus.

Substituting the given values:

ΔL = (200 kg * 9.8 m/s² * 2.0 m) / (7.1 × 10⁻⁶ m² * 11 × 10¹⁰ N/m²)

Calculating the expression:

ΔL ≈ 0.50 mm

Therefore, the increase in length of the copper wire is approximately 0.50 mm.

The change in length (ΔL) can be calculated using the equation:

ΔL = α * L0 * ΔT

where ΔL is the change in length, α is the coefficient of linear expansion, L0 is the original length, and ΔT is the change in temperature.

Substituting the given values:

ΔL = (12 × 10⁻⁶ K⁻¹) * (25 m) * (ΔT)

Assuming the temperature change from winter to summer is 20 degrees Celsius (ΔT = 20°C = 20 K):

ΔL = (12 × 10⁻⁶ K⁻¹) * (25 m) * (20 K)

Calculating the expression:

ΔL = 0.006 m = 6 cm

Therefore, the length of the steel bridge span will increase by approximately 6 cm when it undergoes a temperature change from winter to summer.

4. The heat (Q) required to raise the temperature of an object can be calculated using the equation:

Q = m * c * ΔT

where Q is the heat, m is the mass of the object, c is the specific heat capacity, and ΔT is the change in temperature.

Substituting the given values:

Q = (4.0 kg) * (910 J/kg·C) * (54°C - 10°C)

Calculating the expression:

Q = 173,360 J

Therefore, the heat required to raise the temperature of the aluminum block from 10°C to 54°C is 173,360 J.

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Complete Question:

You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound? It reduces to one-fourth its original value. one-eighth its original value. one-sixteenth its original value. none of the above A copper wire of length 2.0 m, cross sectional area 7.1 times 10^6 m2 and Young's modulus 11 times 10^10 N/m2 has a 200-kg load hung on it. What is its increase in 9.8 m/s2) 0.50 mm 1.0 mm 2.5 mm 5.0 mm The coefficient of linear expansion of steel is 12 times 10^-6 K^-1. What is the length of a 25-m steel bridge span when it undergoes a temperature change of winter to summer? 1.2 cm 1.4 cm 1.6 cm 1.8 cm 2.0 cm A 4.0-kg aluminum block is originally at 10C. How much heat is temperature to 54C? The specific heat capacity of aluminum is 910 J/kg.

Earth today is estimated to have around 40 to 80 million species, which represent approximately 1% of all the species that have ever lived on our planet. This percentage might seem small, but it demonstrates the vast biodiversity that has existed throughout Earth's history.

Many species have gone extinct due to various reasons, such as natural disasters, climate change, and human activities. The remaining species continue to evolve and adapt to their environments, maintaining the richness and complexity of Earth's ecosystems.

Conservation efforts are crucial to protect the existing biodiversity and ensure the survival of future generations of species.

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When the control rods in a reactor core are completely lowered between the fuel rods, they act as a crucial safety measure in controlling the nuclear reaction.

Control rods are made of materials that absorb neutrons, such as boron or cadmium. By lowering them into the reactor core, they effectively reduce the number of free neutrons available to collide with the fuel rods' atomic nuclei, which are typically made of uranium or plutonium.

As the control rods absorb more neutrons, the chain reaction slows down, and the rate of nuclear fission decreases. This reduction in fission events leads to a decrease in the amount of heat and energy produced within the reactor core. As a result, the temperature and pressure in the reactor are maintained at safe levels.

In summary, fully lowering control rods in a reactor core serves as a vital mechanism to manage and control the nuclear reaction taking place. This action ensures the stability and safety of the reactor's operation, preventing potential accidents or overheating. It is important for nuclear power plants to continuously monitor and adjust the position of control rods to maintain the desired reaction rate and keep the facility operating safely and efficiently.

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Answer:

Option 4

Explanation:

The difference between the Paleozoic and Mesozoic Era is that animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic Era.

The Paleozoic is the first part of the Phanerozoic Era, and is followed by the Mesozoic Era, which is the second part.

The difference between the Paleozoic and Mesozoic eras is "Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era." The correct option is D.

The Paleozoic era and Mesozoic era are two major divisions of geological time.

The Paleozoic era, also known as the "age of invertebrates," spanned from about 541 million years ago to about 252 million years ago. During this era, the first multicellular organisms evolved, and there was a rapid diversification of life forms. This era saw the rise of fish, amphibians, and reptiles, as well as the first forests and the development of early land plants. The Paleozoic era ended with a mass extinction event that wiped out about 90% of all marine species and nearly 70% of all land species.

The Mesozoic era, also known as the "age of dinosaurs," spanned from about 252 million years ago to about 66 million years ago. During this era, reptiles continued to dominate the land, and dinosaurs evolved and became the dominant terrestrial animals. This era also saw the rise of birds, the evolution of flowering plants, and the emergence of mammals. The Mesozoic era ended with a mass extinction event that wiped out the non-avian dinosaurs, as well as many other species of plants and animals.

Here in the Question,

Option A, "Animals lived in the water during the Mesozoic and on land in the Paleozoic," is not a correct difference between the two eras. In fact, animals lived both in the water and on land during both the Paleozoic and Mesozoic eras. The Mesozoic era is famous for the rise of the dinosaurs, which were primarily land-dwelling animals, while the Paleozoic era saw the rise of amphibians and the first land-dwelling vertebrates.

Option B, "The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic," is also not a correct difference between the two eras. In fact, birds did not emerge until the Jurassic period of the Mesozoic era, while the first mammals are believed to have emerged during the late Triassic period.

Option C, "Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic," is not correct either. Dinosaurs first appeared during the Mesozoic era and dominated the terrestrial ecosystem for more than 150 million years before they went extinct at the end of the Cretaceous period. The Paleozoic era ended more than 100 million years before the first dinosaurs appeared.

Therefore, The correct option is D. Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

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It will take the 10.0 hp motor 5.18 seconds to lift the 2000 lb elevator a distance of 19.3 feet.

The time it will take a 10.0 hp motor to lift a 2000 lb elevator a distance of 19.3 feet can be determined using the formula for work, which is

Work = Force × Distance.

In this case, the force is the weight of the elevator, which is 2000 lbs, and the distance is 19.3 feet. Therefore, the work done is:

Work = Force × Distance = 2000 lbs × 19.3 feet = 38600 ft-lbs

To convert the work done to time, we use the formula for power, which is

Power = Work ÷ Time.

Here, the power of the motor is 10.0 hp, which is equivalent to 7457 watts.

Therefore, we can substitute the values we have into the formula to solve for time:

Power = Work ÷ Time7457 watts = 38600 ft-lbs ÷ TimeTime = 38600 ft-lbs ÷ 7457 watts = 5.18 seconds

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The time it would take a 10.0 hp motor to lift a 2000 lb elevator a distance of 19.3 feet would be 7.01 seconds. This is calculated using the conversions and the concept of power which is work done per unit time.

To calculate how many seconds it will take a 10.0 hp motor to lift a 2000 lb elevator a distance of 19.3 feet, we need to understand the relationship between power, force, distance and time. Power (P) is the rate at which work is done, or energy is transferred. In this case, we can use the formula P = work/time. The work done in lifting the elevator can be found by multiplying the force (weight of the elevator) by the distance.

First, convert the power from horsepower to watts: 1 hp = 745.7 watts, so 10.0 hp = 7457 watts. Secondly, convert the weight of the elevator to Newtons (N), knowing that 1 lb is approximately equals to 4.448 N, thus 2000 lbs = 8896 N. Lastly, convert the distance from feet to meters: 1 foot = 0.3048 meters, therefore 19.3 feet = 5.88 meters.

The work done is therefore 8896 N * 5.88 m = 52303.68 Joules. Using the power formula P = work/time, we can rearrange to solve for time: time = work / power, thus the time taken is 52303.68J / 7457W = 7.01 seconds.

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MTTF or Mean Time to Failure can be calculated using the given data. The term MTTF is often used to describe the expected lifetime of electronic devices and other items.

Here is how to calculate MTTF when given data:(c) Life testing was made on six non-replaceable) electrical lamps and the following results were obtained.

Calculate MTTF.The following data has been given:Number of lamps, n = 6Total time, T = 10000 hoursFailures, f = 2MTTF formula is given as:MTTF = T / n * fWhere, T = total time during which the test was conducted.n = the number of items tested.f = the number of items failed.Using the given data, we can calculate the value of MTTF as follows:MTTF = T / n * f = 10000 / 6 * 2= 1666.67 hoursTherefore, the MTTF of the six non-replaceable electrical lamps is 1666.67 hours.

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Answer:

Imp_{1-2}=5000[kg*m/s]

Explanation:

In order to solve this problem, we must use the principle of conservation of momentum, which is defined as the product of mass by Velocity.

It must be defined that the impulse after the force is applied is equal to the momentum before the impulse applied on the body.

ΣPbefore = ΣPafter

P = momentum = m*v [kg*m/s]

In this way, we will construct the following equation.

\((m_{1}*v_{1})+ Imp_{1-2}=(m_{1}*v_{2})\)

where:

m₁ = mass of the object = 200 [kg]

v₁ = velocity of the object before the impulse = 15 [m/s]

v₂ = velocity of the object after the impulse = 40 [m/s]

Now replacing:

\((200*15) + Imp_{1-2} = (200*40)\\Imp_{1-2}=5000[kg*m/s]\)

The statement that is correct is that all the carbon atoms in the glucose would end up in the palmitic acid. Option C.

In science a model is used for the purpose of explanation. The model could be used to describe what is going on in the reaction system. We can see from the model that there is a combination of the molecule of glucose with the molecule of oxygen in the molecule.

Now, we can see that the bonds in the glucose that are carbon to carbon bonds are broken and then recombined in such a way that they now lead to the formation of the palmitic acid molecule.

By the law of the conservation of mass, the number of atoms of the reactant is equal to the number of atoms in the product. This would play out as we carry out an atom count of the reactants and the products.

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In the  tetherball game, struck ball whirls around a pole. The vertical component of the tension balances the weight and the horizontal component of tension provides the centripetal force that points toward the center of the circle.

There are two forces acting on a tether ball as it is rotating in uniform circular motion. The force of tension acts along the rope while the weight acts in downward.

The ball will move in a circular motion due to centripetal force and the tether which keeps the ball linked to the pole pulling to the center. For centripetal force, the tether can be an actual object, like a chain, or it may be a force, like gravity that acts like a tether.

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remote control

Explanation:

A remote control uses light waves just beyond the visible spectrum of light—infrared light waves—to change channels on your TV.

The runaway star is farther away from Earth than the sun. the sun is closer to Earth than the runaway star if it seems brighter than the star and the star is 90 times bigger than the sun.

An exceptionally high proper motion, known as a runaway star, is a star that was supposed to have been ejected from a nearby binary system when its companion star exploded supernova. Beyond the Milky Way, these runaway stars seem to be widespread, especially in massive galaxy clusters.

Astronomers have found hundreds of billions of runaway stars in the Virgo cluster. The Milky Way's sun and all of its stars are revolving around its nucleus. Although there are some little local motions within this broader stream of stars, it is largely orderly. Compared to the sun, the runaway star is closer to Earth.

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Answer: Uh i do not know

Explanation:

Answer:

Usually, a solution can have several criteria and constraints. Even though all are important, some criteria are more important than others. The same holds true for constraints. But what do you do if it's impossible for a solution to cover every criterion while avoiding every constraint? In cases like this, you can use prioritization. Listing criteria and constraints based on priority shows the relative importance of each. You will need to prioritize the criteria and constraints for each sub-problem so that you can design a solution for each one individually. Prioritization can help you compare two different possible solutions. For example, the criterion that cars travel at 15 mph through the neighborhood might be a higher priority than the constraint that homeowners are only willing to spend $10,000 on this issue. If this is the case, you would want to generate solutions that also follow the priority in mind. All criteria are important, but engineers must sometimes make a trade-off, which is a compromise or change in one or more criteria or constraints so that they can be met at the same time. This is where prioritization comes in handy as it helps determine the trade-offs. A solution that is doing a better job of meeting one criterion may result in not completely meeting another criterion. Prioritization will help you choose which solution to go with.

Explanation:

I got this from quizlet :)

Answer:

B ) He was the first to systematically study force and motion.

Explanation:

I seen this one before and know the answer since there's 4 options

Answer:6000

Explanation:

Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2. We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

The paint vibrates in response to pressure waves created by the speaker, demonstrating energy transfer as a wave.

The lab set-up with paint poured onto a speaker and afterward turned on with clearly music playing shows energy being moved as a wave thanks to air. At the point when the speaker is turned on, it makes the stomach of the speaker vibrate, which thusly makes the air particles around it vibrate too.

These vibrations make pressure waves all around, which travel outwards from the speaker this way and that.As the tension waves travel through the air, they make the paint on the speaker vibrate and move too, making a noticeable example.

This example is made in light of the fact that the paint isn't quite as adaptable as air, so it doesn't vibrate similarly. All things considered, it moves because of the strain waves, making a noticeable portrayal of the wave energy.

In this manner, the lab set-up shows how energy is moved as a wave through a medium. The energy is conveyed by the tension waves, which cause development and vibrations in the medium.

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Answer:

Jsdiwkwdmxxj we

Explanation:

hcndjnjwidjxnwnjwi

The steel tank can be able to take in a greater air pressure than the balloon.

We have to know that air is a compressible fluid. We must also know that the balloon is an elastic material. The fact is that as you add more air to the balloon the material of the elastic would continue to be stretched.

On the other hand, the steel tank is not elastic but can be able to withstand a greater pressure as you add more air to the tank. The balloon would burst but the tank would not burst.

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To determine the + or - sign of the electric potential, we need to know the signs and positions of the charges relative to point P.

To calculate the electric potential at point P, we need to use the equation for electric potential due to a point charge. The formula is:

V = k * q / r

Where:

V is the electric potential

k is the electrostatic constant (k = 9 * 10^9 Nm^2/C^2)

q is the charge

r is the distance between the point charge and the point at which we are calculating the electric potential.

Since we have two charges, q1 and q2, at point P, we need to calculate the electric potential due to each charge and then add them together.

Let's assume that point P is located at a distance r1 from charge q1 and a distance r2 from charge q2.

Electric potential due to q1:

V1 = k * q1 / r1

Electric potential due to q2:

V2 = k * q2 / r2

To find the total electric potential at point P, we add the potentials due to each charge:

V_total = V1 + V2

To determine the + or - sign of the electric potential, we need to know the signs and positions of the charges relative to point P. Please provide additional information about the positions of point P and the charges q1 and q2 in the diagram.

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Answer:

It is easier to hear a musician in the classroom than outdoors

Explanation:

It is easier to hear a musician in the classroom due to the improved acoustics provided by the walls of the classroom whereby along with the direct sound of the musician, which is the lead source of the sounds, there is an increased number of indirect sound reaching the ear in the classroom than outdoors and due to precedence effect, all the sound appear to come from the musician

In music played outside, along side the direct sound from the musician, the indirect sound that reach the ear is echoed from maybe by only the ground while the majority of the sound from the music wanders away with the wind and in other directions as well as being absorbed such that speakers will be required to improve the sound of the music outdoors.

Answer:

the answer is 1.8°f...

Answer:

33.8 degrees.

Explanation:

the magnitude of the linear momentum of the electron just after it collides with the photon is (7.558 × 10⁻²⁶) kgm/s.

Let the photon's wavelength before it collides. =  λ

After a collision, the photon's wavelength equal = λ'

before a collision, the photon's frequency = f

After-collision photon frequency = f'

Pp = (h/) is the momentum of the photon prior to collision.

Prior to collision, the photon's momentum is given by Pp' = (h/'), where h is Planck's constant.

Let P represent the electron's post-collision momentum.

According to Compton's theory, the elastic collision between a photon and an electron abides by the principles of momentum and energy conservation.

The conservation of momentum

Momentum before collision = momentum after collision

Before momentum collision = Pp.

After-collision momentum = (Pp' + P)

Pₚ = (Pₚ' + P)

P =  (Pp - Pp') = (h/) - (h/') = h[(1/) - (1/')]

With the exception of the photon's after-collision wavelength, all of the variables needed to determine the electron's momentum are known.

We utilize the Compton's wavelength formula to determine this.

Compton established from the principle of conservation of mass and momentum that the wavelength of the electron following a collision i λ's given by

λ' - λ = (h/m₀c) (1 - cos θ)

where; h = Planck's constant = 6.63 × 10⁻³⁴ J.s

m₀ = mass of the electron = 9.11 × 10⁻³¹ kg

c = speed of light = 3.0 × 10⁸ m/s

θ = angle of scattering of the photons after collision = 60°; cos 60° = 0.5

λ = 0.102 nm = 1.02 × 10⁻¹⁰ m

λ' - λ = [(6.63 × 10⁻³⁴/(9.11 × 10⁻³¹ × 3.0 × 10⁸)] × 0.5

λ' - λ = 1.213 × 10⁻¹² m

λ' = λ + (1.213 × 10⁻¹²) = (1.02 × 10⁻¹⁰) + (1.213 × 10⁻¹²) = (1.032 × 10⁻¹²) m

P = (Pₚ - Pₚ') = (h/λ) - (h/λ') = h[(1/λ) - (1/λ')]

P = h[(1/λ) - (1/λ')] = (6.63 × 10⁻³⁴) [(1/(1.02 × 10⁻¹⁰)) - (1/(1.032 × 10⁻¹²))] = (6.63 × 10⁻³⁴) (113999088) = (7.558 × 10⁻²⁶) kgm/s

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Answer:

velocity=2m/s

I hope it's helps you

Answer:

Its average speed, pretending that it traveled at a constant speed, is

v = s / t

= 600 m

5 x 60 s

= 2 m/s

Hope it help...

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