find the slope of the line that passes through the following pairs of points. (10, 8) (9, 13)

According to the question C. The values of ΔG° for each reaction are not shown.

A reaction is a chemical process that takes place within a system and is researched using thermodynamic concepts. The study of energy transfer and the behaviour of systems, especially chemical reactions, is the main emphasis of thermodynamics.

Energy changes, notably in the form of heat and work, are a part of thermodynamic reactions. The response has the ability to work with or be worked on by its environment, as well as to either absorb or emit heat energy from it. Enthalpy (H), entropy (S), and Gibbs free energy (G) are examples of thermodynamic parameters that can be used to measure the energy changes brought about by reactions.

The thermodynamic favorability for each component reaction that the combined reaction in a coupled pair of reactions is crucial to comprehending how coupled reactions function. Because of the combination of the unfavorable disintegration of iron oxide into its constituent parts (G°>0) and the advantageous burning of carbon to produce carbon dioxide (G°0), the blast furnace reaction in this instance is favorable.

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Complete Question:

Answer:

  first 31        second 69

Explanation:

Answer:

Refer to the diagram and use the drop-down menus to answer each question. How much energy is reflected by the Earth system? How much energy is absorbed ...

Explanation:

they delted our page

Answer:

I think it is true I'm not saying it is but if you get another person who says its true say true

Explanation:

To determine how much power is needed for a fan to do 500J of work in 4 seconds, we need to use the formula for power which is: Power = Work / Time

Substituting the given values, we have: Power = 500J / 4s. Simplifying this expression, we get: Power = 125 Watts. Therefore, the fan would need 125 Watts of power to do 500J of work in 4 seconds. It is important to note that power is a measure of how quickly work is done, and it is calculated by dividing the amount of work done by the time it takes to do that work. In this case, the fan needs to work at a rate of 125 Watts to accomplish the given task. To calculate the power required for a fan to do 500 J of work in 4 s, we can use the formula for power: P = W/t, where P represents power, W represents work, and t represents time. In this case, W = 500 J and t = 4 s. Using the formula, we get: P = 500 J / 4 s. P = 125 W. So, it takes 125 watts of power for a fan to do 500 J of work in 4 seconds.

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The radius of the track is approximately 22.91 m.

We are given that it takes 840 s to walk completely around a circular track, moving at a speed of 1.20 m/s. We are to determine the radius of the track.

Let the radius of the track be r metres. The circumference of a circle is given by C = 2πr. The time taken to walk around the track is given by time = distance / speed.

We haveC = 2πr

Distance travelled to walk around the circular track = C = 2πr.

Time taken to walk around the track = 840 s.Speed of walking = 1.20 m/s

The distance covered is obtained by multiplying the speed and the time.

Hence;Distance = Speed × Time Distance = 1.20 m/s × 840 s Distance = 1008 m

We can now equate the distance to the circumference of the track. Circumference of the circular track = Distance travelled

C = 2πr = 1008 m

Dividing both sides by 2π,

we get:r = C / (2π)r = 1008 / (2 × 22 / 7)r

= 1008 / 44r = 22.91 m

The radius of the track is approximately 22.91 m.

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The angle θ is approximately 0.688°, and the angle θ' is approximately 1.988°.

To determine the angles θ and θ' in the given scenario, we can use Snell's Law, which relates the angles of incidence and refraction to the refractive indices of the media involved. Snell's Law can be stated as follows:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

Where:

n₁ is the refractive index of the medium of incidence (in this case, air with a refractive index close to 1),

θ₁ is the angle of incidence,

n₂ is the refractive index of the medium of refraction (in this case, linseed oil with a refractive index of 1.48), and

θ₂ is the angle of refraction.

Let's solve for the unknown angles θ and θ' using the given information.

Given:

Angle of incidence θ = 1°

Refractive index of linseed oil n₂ = 1.48

We need to find the angle of refraction θ₂.

Using Snell's Law, we have:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

Since the refractive index of air (n₁) is approximately 1, we can simplify the equation to:

sin(θ₁) = n₂ * sin(θ₂)

Plugging in the values:

sin(1°) = 1.48 * sin(θ₂)

We can now solve for θ₂:

θ₂ = arcsin(sin(1°) / 1.48)

Calculating this value, we find:

θ₂ ≈ 0.688°

Now, let's determine the angle θ'.

Given:

Angle of refraction θ₂ = 0.688°

Refractive index of linseed oil n₂ = 1.48

We need to find the angle of incidence θ'.

Using Snell's Law, we have:

n₂ * sin(θ₂) = n₁ * sin(θ')

Since the refractive index of air (n₁) is approximately 1, we can simplify the equation to:

n₂ * sin(θ₂) = sin(θ')

Plugging in the values:

1.48 * sin(0.688°) = sin(θ')

Solving for θ', we find:

θ' = arcsin(1.48 * sin(0.688°))

Calculating this value, we get:

θ' ≈ 1.988°

Therefore, the angle θ is approximately 0.688°, and the angle θ' is approximately 1.988°.

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im pretty sure is a?

Explanation:

non given you awnser only

Work done on the cart by friction can be calculated by multiplying the magnitude of the frictional force by the displacement of the cart. In this case, the work done by friction is -700 J.

The work done by a force is given by the equation:

Work = Force * Displacement * cos(θ)

where Force is the magnitude of the force, Displacement is the magnitude of the displacement, and θ is the angle between the force and the displacement.

In this scenario, the frictional force is 35.0 N and the displacement of the cart is 20.0 m. The angle between the force and displacement is 40 degrees below the horizontal, which means the angle is -40 degrees.

To calculate the work done by friction, we substitute the given values into the equation:

Work = 35.0 N * 20.0 m * cos(-40°)

Using the cosine function with the negative angle, we find that cos(-40°) is equal to cos(40°).

Work = 35.0 N * 20.0 m * cos(40°)

Calculating this expression, we determine that the work done on the cart by friction is approximately -700 J.

Therefore, the work done on the cart by friction is -700 J, indicating that the frictional force acts in the opposite direction of the displacement, resulting in negative work.

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The net radiant energy lost by the 2-cm-diameter cylinder per meter of length is X Joules. The temperature of the 6-cm-diameter cylinder is Y °C.

To calculate the net radiant energy lost by the 2-cm-diameter cylinder per meter of length, we need to consider the Stefan-Boltzmann law and the emissivities of both cylinders. The formula for net radiant heat transfer is given:

Q_net = ε1 * σ * A1 * (T1^4 - T2^4)

Where:

- Q_net is the net radiant energy lost per meter of length.

- ε1 is the emissivity of the 2-cm-diameter cylinder.

- σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/(m^2·K^4)).

- A1 is the surface area of the 2-cm-diameter cylinder.

- T1 is the temperature of the 2-cm-diameter cylinder.

- T2 is the temperature of the surroundings (27 °C).

To calculate the temperature of the 6-cm-diameter cylinder, we can use the formula for the net radiant energy exchanged between the two cylinders:

Q_net = ε1 * σ * A1 * (T1^4 - T2^4) = ε2 * σ * A2 * (T2^4 - T3^4)

Where:

- ε2 is the emissivity of the 6-cm-diameter cylinder.

- A2 is the surface area of the 6-cm-diameter cylinder.

- T3 is the temperature of the 6-cm-diameter cylinder.

By solving these equations simultaneously, we can find the values of Q_net and T3.

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A long cylinder having a diameter of 2 cm is maintained at 600 °C and has an emissivity of 0.4. Surrounding the cylinder is another long, thin-walled concentric cylinder having a diameter of 6 cm and an emissivity of 0.2 on both the inside and outside surfaces. The assembly is located in a large room having a temperature of 27 °C. Calculate the net radiant energy lost by the 2-cm-diameter cylinder per meter of length. Also, calculate the temperature of the 6-cm-diameter cylinder

The correct answer is C) they both are powered by wind, as hydrokinetic power is generated by the movement of tides and waves. Wind and hydrokinetic power both involve the use of turbines to generate electricity, and both have minimal environmental impacts.

The statement that is not true about wind and hydrokinetic power is "they both are powered by wind. A rotor blade connected to a shaft converts kinetic energy from the wind into mechanical energy. This mechanical energy is used to rotate a shaft. The shaft is connected to a generator, which converts mechanical energy into electrical energy in a wind turbine. Hydrokinetic power, on the other hand, harnesses the energy of moving water, such as ocean waves or tides, and converts it into electricity.

Turbines are used to harness the kinetic energy of moving water and convert it into electrical energy. Thus, statement c) which says that wind and hydrokinetic power both are powered by wind is false as hydrokinetic power uses the energy of moving water.

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A neutral stimulus will turn into a conditioned stimulus (CS) and cause a conditioned response (CR) that is comparable to the initial unconditioned response if it is combined with an unconditioned stimulus (US) that has already caused an unconditioned response (UR).

A neutral stimulus is one that first merely directs attention and doesn't elicit any specific responses. When coupled with an unconditioned stimulus in classical conditioning, the neutral stimulus becomes a conditioned stimulus. The neutral stimulus will also elicit a response, known as a conditioned response, with repeated presentations of both the neutral stimulus and the unconditioned stimulus.

So, CR i.e., conditioned response is after learning while NS i.e.,  Neutral Stimulus is before learning.

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True. In circular motion, the centripetal acceleration changes only the direction of velocity, but not its magnitude.

Centripetal acceleration is the acceleration directed toward the center of the circular path and is responsible for keeping an object moving in a curved path. It is always perpendicular to the velocity vector of the object at any given point on the path.

The magnitude of the centripetal acceleration, denoted as "a_c," can be calculated using the following formula:

a_c = (v^2) / r

Where:

- v is the magnitude of the velocity of the object

- r is the radius of the circular path

As the object moves along the circular path, its velocity vector constantly changes direction. However, the magnitude of the velocity, represented by "v," remains constant unless acted upon by an external force.

Therefore, the centripetal acceleration only affects the direction of the velocity vector, causing it to continuously change, while the magnitude of the velocity remains constant.

True. In circular motion, the centripetal acceleration changes only the direction of velocity, but not its magnitude.

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Answer:

the conservation of both matters because without each other the balance of nature will be destroyed it helps in such a way that the food chain will be maintained.

it is as such considered because without matter there would be no energy and the reverse is such.

it is still considered because without one another famous atomic theories wouldn't have been made such as gas, liquid and solid.

in conclusion all these work together to balance the galaxy as a whole

Both the conservation of energy and the conservation of matter is important because, without each other, the natural equilibrium will be disrupted.

According to the Law of conservation of energy. Energy can not be created nor be destroyed it can transfer from one to another form.

The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.

The conservation of both is important because without each other, the natural equilibrium will be disrupted, and it aids in the maintenance of the food chain.

It is seen as such because there would be no energy without matter and vice versa.

Hence both the conservation of energy and the conservation of matter is important

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compressed0.32 meters

Explanation

Step 1

The force exerted by a spring on objects attached to its ends is proportional to the spring's change in length away from its equilibrium length and is always directed towards its equilibrium position.

so

let

replace and solve for x

the negative symbol indicates the spring is compresed

so, the answer is

0.32 meters

I hope this helps you

When a given molecule absorbs a photon of microwave radiation, its rotational energy state changes.

The absorption of a microwave photon by a molecule causes a change in its rotational energy state. The rotation of a molecule occurs about its center of mass, which is referred to as its rotational energy. When a molecule absorbs microwave radiation, it acquires energy that causes it to transition to a higher rotational energy state.

The absorption of a microwave photon results in an increase in the energy of the molecule, which causes it to spin faster around its axis. In order to make this change, the molecule must first absorb the radiation's energy.

As a result, microwave radiation is often used to investigate molecular structures because it can induce transitions between different rotational energy levels of a molecule.

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The outermost energy shell of the atom, where the electrons are situated in relation to the nucleus. the energy levels are-  1 (only"s"), 2 ("s","p"), 3 ("s","p","d"), 4 ("s", "p", "d", "f").

An atom's energy level is the set distance between its nucleus and any potential location for electrons. Additionally, energy levels might be compared to a staircase's steps.

Most major diseases, including heart disease, many types of cancer, autoimmune diseases like lupus and multiple sclerosis, and anemia, commonly manifest with a lack of energy (too few red blood cells). Another typical indicator of depression and anxiety is fatigue. Additionally, a side effect of several drugs is weariness.

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Answer:

the way you speak with your entire body

Explanation:

Body language is the way you speak with your entire body. Therefore, the correct option is option D.

Body language refers to a form of communications in which information is expressed or conveyed via bodily behaviors rather than words. Face expressions, body posture, movements, eye movement, touch, and use of space are examples of this type of behavior.

Although the phrase "body language" is typically used in reference to people, it can also be used in reference to animals. Kinesics, another name for the research of body language, is related. Although facial expression is a crucial component of communication, much of it occurs subconsciously. Body language is the way you speak with your entire body.

Therefore, the correct option is option D.

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A sound wave produced by a clock 515 m away is heard 1.50 sec later. The speed of sound in the air is 343.3 m/s.

The pattern of disruption brought on by energy moving away from the sound source is known as a sound wave. Longitudinal waves are what make up sound. This indicates that the direction of energy wave propagation and the particle vibrational propagation are parallel. The atoms oscillate when they are put into vibration. A high-pressure and a low-pressure zone are created in the medium as a result of this constant back and forth action. Compressions and rarefactions, respectively, are terms used to describe these high- and low-pressure zones. The sound waves go from one medium to another as a result of these regions being transmitted to the surrounding media.

As we know that

Speed = Distance ÷ time

So, here speed be 515 m

And, the time is 1.50 seconds

So, the speed of the sound is

= 515 m ÷ 1.50 seconds

= 343.3 m/s

hence, the speed of the sound in the air is 343.3 m/s

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Answer:

God is a metal- gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard condition.

•Gold is the chemical element with 79 protons in each atomic nucleus. Every atom containing 79 protons is a gold atom.

Therefore, based on the estimated duration of a galactic year, Earth has been around for approximately 18.4 to 20.4 galactic ye

A "galactic year" refers to the time it takes for our solar system to complete one orbit around the Milky Way galaxy. The exact duration of a galactic year is not precisely determined due to various factors, such as the varying speeds of stars within the galaxy. However, it is estimated to be roughly 225-250 million years.

To calculate the number of galactic years Earth has been around based on the age of the solar system (4.6 billion years), we can divide the age of the solar system by the estimated duration of a galactic year:

Number of Galactic Years = Age of the Solar System ÷ Duration of a Galactic Year

Number of Galactic Years = 4.6 billion years ÷ 225-250 million years

Number of Galactic Years ≈ 18.4 to 20.4 galactic years

Therefore, based on the estimated duration of a galactic year, Earth has been around for approximately 18.4 to 20.4 galactic years.

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The average frequency of the two forks will be 457 Hz.

Frequency:

In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time. When a body in periodic motion goes through a series of events or positions before returning to its initial state, it is said to have experienced one cycle or one vibration.

Average Frequency;

Mathematically,

                           \(f_{Avg}=\frac{f_{1}+f_{2} }{2}\)

Given,

         \(f_{1} = 454 Hz\)

         \(f_{2}=460 Hz\\\)

Using the Average frequency formula,

                         \(f_{Avg}=\frac{f_{1}+f_{2} }{2}= \frac{454+460}{2}\)

                        \(f_{Avg}=\frac{914}{2}\)

                         \(f_{Avg}=457Hz\)                       

Hence,

         The average frequency of the two forks will be 457 Hz.

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A steel wire 4.5 m long stretches 0.15 cm when it is given a tension of 370 N. then the diameter of the wire is 2.6 × 10⁻³ m.

Given,

length of the wire L = 4.5 m

elongation l = 0.15 cm = 0.15 × 10⁻² m

restoring force F = 370 N

In this problem young's modulus of the wire is not given, consider the young's modulus of the wire is Y = 2 × 10¹¹ pa.

Youngs modulus Y = Fl ÷ AL

where A is cross sectional area of the wire,

Putting all the values

2 × 10¹¹ pa. = 370 N × 4.5 m ÷ A × 0.15 × 10⁻² m

A. = 370 N × 4.5 m ÷  2 × 10¹¹ pa × 0.15 × 10⁻² m

A = 5.55 × 10⁻⁶

πr² = 5.55 × 10⁻⁶

r = 1.32 × 10⁻³ m

Diameter d = 2r = 2 × 1.32 × 10⁻³ m = 2.6 × 10⁻³ m.

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Answer:

3/2 Ω

Explanation:

ONE WAY :

1/ (1/3 + 1/3)  = 1/(2/3) =  3/2 Ω

When you have two resistors in parallel , here is another way

   3*3 /(3+3)  = 9/6 = 3/2  Ω    

 ( you can use this method ONLY when you have two parallel resitances !)

Answer: 5.42 kg

Explanation:

The formula for kinetic energy is:

KE = 1/2 * m * v^2

where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

We are given the kinetic energy (KE) and velocity (v), so we can rearrange the formula to solve for the mass (m):

m = 2 * KE / v^2

Substituting the given values, we get:

m = 2 * 390 J / (12 m/s)^2

m = 2 * 390 J / 144 m^2/s^2

m = 5.42 kg (rounded to two decimal places)

Therefore, the mass of the stone is approximately 5.42 kg.

Answer:

\(density = \frac{mass}{volume} \\ \\ density = \frac{14.4}{2} \\ \\ { \boxed{ \boxed{density = 7.2 \: g {cm}^{ - 3} }}}\)