determine which variables are known and which are not. an air-filled pipe is found to have successive harmonics at 480 hz , 800 hz , and 1120 hz . it is unknown whether harmonics below 480 hz and above 1120 hz exist in the pipe. what is the length of the pipe?

Non - Metals:

Some terms:

★ Malleable: This means that metals can be beaten into thin sheets with hammer.

★ Ductile: This means that metals can be drawn into thin wires.

★ Brittle: This means that non-metal break into pieces on hammering.

★ Sonorous: This means capable of producing a ringing sound.

Porter's Five Forces is a framework used to analyze the competitive intensity and attractiveness of an industry. The five forces are: Threat of New Entrants, Bargaining Power of Suppliers, Bargaining Power of Buyers, Threat of Substitute Products or Services and Intensity of Competitive Rivalry.

Threat of New Entrants: This force considers the ease or difficulty for new competitors to enter an industry. It includes barriers to entry such as high capital requirements, economies of scale, brand loyalty, and government regulations.

Example: The airline industry is known for its high barriers to entry due to the significant capital required to purchase aircraft, establish routes, and secure necessary licenses and permits. Additionally, established airlines often have loyal customer bases and strong brand recognition, making it challenging for new entrants to compete effectively.

Bargaining Power of Suppliers: This force assesses the power suppliers have over the industry in terms of pricing, quality, and availability of inputs. It considers factors such as the concentration of suppliers, uniqueness of their products, and their ability to forward integrate.

Example: In the smartphone industry, major suppliers of components like microchips and display screens hold significant bargaining power. These suppliers provide essential inputs, and their products may have limited alternatives or require specialized manufacturing processes. As a result, smartphone manufacturers must negotiate favorable terms with these suppliers to ensure a reliable supply chain and competitive pricing.

Bargaining Power of Buyers: This force examines the power customers have in influencing prices, demanding better quality or service, and potentially switching to alternative products or suppliers. It considers factors such as buyer concentration, product differentiation, and switching costs.

Example: The retail industry experiences strong buyer power, particularly in highly competitive markets. Customers have access to various options, and their ability to compare prices and products easily through online platforms empowers them to demand competitive pricing, promotions, and high-quality products and services.

Threat of Substitute Products or Services: This force looks at the availability of alternative products or services that can satisfy customer needs. It considers factors such as price-performance trade-offs, switching costs, and customer loyalty.

Example: The rise of streaming services such as Netflix, Amazon Prime Video, and Hulu posed a significant threat to traditional cable and satellite TV providers. These streaming platforms offer a wide range of content at competitive prices, allowing customers to switch from traditional TV services to streaming options, resulting in a decline in subscriber numbers for traditional providers.

Intensity of Competitive Rivalry: This force evaluates the level of competition among existing firms in the industry. It considers factors such as the number and size of competitors, industry growth rate, product differentiation, and exit barriers.

Example: The soft drink industry, dominated by major players like Coca-Cola and PepsiCo, experiences intense competitive rivalry. These companies fiercely compete for market share through advertising campaigns, new product launches, pricing strategies, and distribution channels. The rivalry is further intensified by the high market saturation and the limited scope for differentiation among similar products.

The interconnection of these forces lies in their collective influence on the competitive dynamics and profitability of an industry. Changes in one force can trigger a chain reaction that impacts the others. For instance, a high threat of new entrants may lead to increased competitive rivalry as existing firms strive to defend their market share. Similarly, a strong bargaining power of buyers can limit the pricing power of suppliers and impact their profitability. Understanding these interconnections helps businesses assess the overall attractiveness and competitive landscape of an industry and develop appropriate strategies to thrive within it.

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If light from an infinite distance away hits a convex lens, the image will form at the focal point of the lens. So, the answer is B.

This is because when the object is at an infinite distance, the incoming light rays are parallel to each other. When these parallel rays pass through the convex lens, they converge to a point, which is the focal point of the lens.

Since the light rays converge at the focal point after passing through the lens, the image of the object will be formed at the focal point as well. Therefore, the correct option is B: at the focal point of the lens.

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Answer: C

Explanation: When you have a tomato for example, it absorbs every color but red and therefore, appears red.

The ratio of the force of gravity acting upon you when standing on Earth versus when standing on Nemesis is:

Fearth/Fnemesis = 735 N / 147 N = 5.00

To calculate the ratio of the force of gravity acting upon you when standing on Earth versus when standing on Nemesis, we need to use the formula for the gravitational force:

F = G * (m1 * m2) / r^2

where F is the force of gravity, G is the gravitational constant (6.67 x 10^-11 N * m^2 / kg^2), m1 and m2 are the masses of the two objects, and r is the distance between them.

Let's assume that Nemesis has the same density as Earth and has a radius of 3200 km (half the radius of Earth). Its mass can be calculated as follows:

\(Mnemesis = (4/3) * pi * (r^3) * density\)

\(= (4/3) * pi * (3200 km)^3 * 5500 kg/m^3\\\)

        = 1.24 x 10^24 kg

Now, we can calculate the force of gravity acting upon you when standing on Earth:

\(Fearth = G * (mEarth * mYou) / rEarth^2\)

\(= 6.67 x 10^-11 N * m^2 / kg^2 * (6 x 10^24 kg * 75 kg) / (6400 km)^2\)

      = 735 N

And we can calculate the force of gravity acting upon you when standing on Nemesis:

\(Fnemesis = G * (mNemesis * mYou) / rNemesis^2\)

\(= 6.67 x 10^-11 N * m^2 / kg^2 * (1.24 x 10^24 kg * 75 kg) / (3200 km)^2\)

        = 147 N

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People have looked up at birds for years and they have inspired us to fly. Airplanes have wings, just like birds. They also have a light skeleton (or framework) to decrease their weight, and they have a streamlined shape to decrease drag.

The airplane's airspeed is 120.0 km/h, with a heading of 30.0° east of north. We can break this down into northward and eastward components. The northward component is 120.0 km/h * cos(30.0°) ≈ 103.9 km/h, and the eastward component is 120.0 km/h * sin(30.0°) ≈ 60.0 km/h.

The wind is blowing towards the west at 30.0 km/h, so it has a westward component of 30.0 km/h.

To find the airplane's ground speed, we need to combine these components. The northward component remains unchanged at 103.9 km/h, while the eastward component gets reduced due to the westward wind, giving us 60.0 km/h - 30.0 km/h = 30.0 km/h.

Now, we can find the resultant ground speed using the Pythagorean theorem: √((103.9 km/h)^2 + (30.0 km/h)^2) ≈ 107.9 km/h.

So, the approximate speed of the plane relative to the ground is 107.9 km/h.

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Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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The centripetal acceleration of the ball been whirled in a circular path is 6m/s².

Hence, Option D) 6m/s² is the

Given the data in the question:

Centripetal acceleration is the acceleration of a particle moving in a circular path. It is expressed as:

\(a_c = \frac{v^2}{r}\)

Where \(a_c\) is the Centripetal acceleration, v is the speed of the motion and r is the length of the string or radius of the circular pattern.

We substitute our given values into the equation

\(a_c = \frac{(3m/s)^2}{1.5m}\\\\a_c = \frac{9m^2/s^2}{1.5m}\\\\a_c = 6m/s^2\)

The centripetal acceleration of the ball been whirled in a circular path is 6m/s².

Hence, Option D) 6m/s² is the correct answer.

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If a person is forced to utilize self-defense, the offensive techniques that should be recommended are as follows:

I would advise them to employ the following defense strategies:

Based on the films, the move(s) that appear to be the most successful for the offense in a circumstance requiring self-defense are to target the problem rather than the person.

An aggressive competitive strategy is a form of company strategy that involves actively pursuing industry changes.

Companies that go on the offensive typically make acquisitions and invest extensively in R&D and technology in order to remain ahead of the competition.

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When a process is said to be at a certain sigma level, it refers to its level of process performance or capability.

Sigma (σ) is a statistical term that represents the standard deviation of a process, which measures the variability or spread of data within that process. In the context of process improvement methodologies like Six Sigma, sigma level is used as an indicator of process quality and defect rate.

A process at 4 sigma level means that it exhibits a level of performance where the process variation is such that there are about 6.68 defects per million opportunities (DPMO), or a defect rate of 0.000668%. This level of performance indicates that the process has a relatively higher variability and there is room for improvement to reduce defects and improve quality.

On the other hand, a process at six sigma level represents a higher level of process performance. It means that the process exhibits a very low level of variation, with only about 3.4 defects per million opportunities (DPMO), or a defect rate of 0.000034%. A six sigma level process is considered to be highly capable and aims to achieve near-perfection in terms of quality and minimizing defects.

Comparing a process at 4 sigma level to a process at six sigma level, the key difference lies in the level of process performance and the associated defect rates. A process at six sigma level has significantly lower variation and defect rate compared to a process at 4 sigma level. The six sigma level represents a higher standard of quality and is more reliable and consistent in delivering products or services with minimal defects. The 4 sigma level, while still considered good, has a higher potential for improvement and may benefit from further efforts to reduce variation and defects to achieve higher levels of quality and process capability.

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Answer:

Because the output force is greater than the input force, the input distance must be greater than the output distance.

Explanation:

Answer: The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases.

Explanation: I just did a quiz with this question

A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.

In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

Therefore, A micrometer is used to measure the diameter of a length of copper wire. The zero error and scale reading are as shown.The correct answer should be the micrometer.

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Answer:

i don't know.. but it get to me every day..

Explanation:

Given that a 12 V battery is connected to four resistors. We need to calculate the current in the 8.0 Ω resistor.

To find the current flowing through the resistor we need to use Ohm's law.

Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

The formula is given as,I = V/R where,I is the current V is the voltage R is the resistance

Therefore, the current through the 8.0 Ω resistor is given by: I = V/R = 12 V / 8.0 ΩI = 1.5 A

So, The current in the 8.0 Ω resistor is 1.5 A.

Resistor : An electrical component that regulates or restricts the flow of electrical current in an electronic circuit is known as a resistor. Additionally, resistors can be utilized to supply a particular voltage to an active device like a transistor.

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Answer:

the answer is 200seconds(s)

The stereo's current is roughly 2.15 A.

The resistance of the wire that makes up the toaster's heating element is roughly 8.70.

Ohm's law can be used to determine the current in the stereo:

I = V / R

where V is the potential difference, I is the current, and R is the resistance.

By entering the specified values, we obtain:

I = 140 V / 65 Ω ≈ 2.15 A

As a result, the stereo's current is roughly 2.15 A.

The following is the power equation in terms of voltage and resistance:

P = V² / R

P stands for power, V for voltage, and R for resistance.

By entering the specified values, we obtain:

1150 W = (100 V)² / R

When we rewrite the equation, we obtain:

R = (100 V)² / 1150 W ≈ 8.70 Ω

As a result, the resistance of the wire that makes up the toaster's heating element is roughly 8.70.

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Answer:

Explanation:

m = 1500 kg

u = 15 m/s

v  = 25 m/s

s = 100 m

\(v^{2} = u^{2} + 2as\)

\(25^{2} = 15^{2} + 2a\) × 100

625 = 225 + 200 a

-200a = 225 - 625

-200a = -400

a = 400 / 200

a = 2 m/s

f = ma

f = 1500 × 2

= 3000 N

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According to the conservation of energy

At the top of the hill, only the potential energy will work as it is at rest.

Also, potential energy increases with height, so if the height of the first hill is the highest, the total energy will be more.

The statement is true, equipotential surfaces of 50 v, 40 v, 30 v, 20 v and 10 v near a single, positive point charge are equally spaced in the radial direction.

The surface in an electric field where the value of electric potential is the same at all the points on the surface is called equipotential surface. The potential difference between two points in an equipotential surface is zero.

Thus, work done in moving the charge from one point to another in an equipotential surface is zero. since the work is done is zero when the direction of force (electric field) and displacement is normal.

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Answer:

Circuit Breaker - a protective device used to automatically blows and cuts the current when trouble in the circuit such as short circuit or overload occurs

Answer

As the earth is an oblate spheroid, its radius near the equator is more than its radius near poles. Since for a source mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth.

Explanation:

As oxygen levels increase, polarization tends to decrease. This is because oxygen is a highly electronegative element, meaning it has a strong attraction for electrons.

As oxygen molecules are introduced to a system, they will attract electrons away from other molecules, causing an overall decrease in polarization. This can have various effects on the system, depending on the specific context. For example, in certain chemical reactions, decreased polarization can lead to a decrease in reactivity or a decrease in the strength of intermolecular forces. However, in other contexts, such as in biological systems, decreased polarization may be beneficial, as it can help to stabilize important molecules like proteins and DNA. Overall, the relationship between oxygen levels and polarization is an important factor to consider in many different scientific fields, and can have a significant impact on the behavior of systems ranging from the smallest chemical reactions to the largest ecosystems.

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Answer:

Centrifugal Force = 45.65N

Explanation:

Given the following data;

Mass, m = 80kg

Radius = 487m

Velocity = 60km/h to m/s = 60*1000/3600 = 16.67m/s

To find the centrifugal force;

Centrifugal Force = mv²/r

Substituting into the equation, we have;

Centrifugal Force = 80*16.67²/487

Centrifugal Force = 80*277.89/487

Centrifugal Force = 2223.12/487

Centrifugal Force = 45.65N