Your tube is half a meter long, with one end closed and the other open. The speed of sound is 344m/s. What is the lowest resonant frequency (largest wavelength)?
Please give the units in Hz.

Yes, that is correct. The pharynx is a muscular tube that connects the nasal and oral cavities to the larynx and esophagus.

The pharynx does not form the lower part of the vocal tract, but rather it forms the upper part of the vocal tract.

The pharynx is a muscular tube that connects the mouth and nasal cavities to the esophagus and larynx. It is responsible for the passage of air, food, and liquids. The vocal tract includes the larynx, pharynx, oral cavity, and nasal cavity. The pharynx plays an important role in vocalization by aiding in the resonance and modulation of sounds produced by the vocal folds in the larynx. The lower part of the vocal tract is the larynx, which contains the vocal cords and is the primary structure involved in voice production.

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The major axis of an elliptical galaxy has been measured to be 80,000 light years, and its minor axis has been measured to be 40,000 light years.

Elliptical galaxies are one of the three main types of galaxies, along with spiral galaxies and irregular galaxies. They are named for their generally ellipsoidal shape, which ranges from nearly spherical to highly elongated. The shape of an elliptical galaxy is characterized by its axial ratio, which is the ratio of its major axis to its minor axis.

The axial ratio of an elliptical galaxy determines its classification into one of several types, from E0 to E7. E0 galaxies are nearly spherical, with an axial ratio of 1:1, while E7 galaxies are highly elongated, with an axial ratio of 7:1.

In the given question, the major axis of the elliptical galaxy is 80,000 light years and its minor axis is 40,000 light years. To determine the axial ratio, we divide the major axis by the minor axis.

axial ratio = major axis / minor axis

axial ratio =  80,000 / 40,000

axial ratio = 2

Since the axial ratio is 2, this elliptical galaxy falls between the E0 and E3 types. However, it is closer to the E0 type, as its axial ratio is closer to 1:1 than it is to 3:1.

Hence, the given elliptical galaxy is most likely an E0 type elliptical galaxy, which is nearly spherical in shape.

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Answer:

aqnweser of magnitude of the x)2 of the arrow of the manginutre filed

Explanation:

Icebergs are surrounded by fog as :4)The chilled air in the vicinity of iceberg results in condensation of water vapor in air (fog).

Icebergs are much colder than the surrounding air and water, which creates temperature difference between water and air near the iceberg. This temperature difference can cause air to cool and become saturated with water vapor, which can then condense into fog. This is similar to how fog forms over a lake or river on cool morning.

As the air cools near the iceberg, the water vapor in air condenses into tiny water droplets that create fog. This fog can be quite dense, making it difficult for ships and boats to navigate around the iceberg.

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The most likely composition of this sample is a mixture of ionized oxygen, hydrogen and iron.

Specific wavelengths of light that are emitted or absorbed by atoms or molecules are called as spectral lines. Each element has a unique set of spectral lines that are characteristic of that element.

The wavelengths given correspond to spectral lines of ionized oxygen, hydrogen, and iron, respectively. Therefore, most likely composition of the sample is mixture of these elements. It is important to note that other elements could also produce spectral lines at similar wavelengths, but given the prominence of these three lines, it is likely that these are the dominant elements in sample.

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The artifact that results in improper side-by-side positioning reflectors is c. refraction. The refractive index of the surface causes the incident ray to deviate from its intended path when it enters the refracting surface.

The angle formed by the refracted beam and the surface's perpendicular is known as the angle of refraction.

Normal refers to the surface's perpendicular.

The angle between the refracted light and the Normal is hence the angle of refraction.

When light waves cross the line separating two materials with different densities, like air and glass, their speed changes. They alter their direction as a result, which is referred to as refraction.

the rate of change of light as it passes through one medium and then enters another. Refraction results from this. The difference in media affects how light travels through the atmosphere and into water.

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The principles demonstrated in the carbon dioxide and water acidity experiment are evident in many real-life situations such as in the process of ocean acidification.

In the process of ocean acidification; as carbon dioxide dissolves in seawater, it reacts to form carbonic acid, which increases the acidity of the ocean. This increased acidity can harm many marine organisms, such as shellfish and coral, by making it more difficult for them to build and maintain their shells and skeletons.

Another example is the effect of carbon dioxide emissions from cars and factories on the acidity of rainwater. When carbon dioxide reacts with water in the atmosphere, it forms carbonic acid, which can make rainwater more acidic. This acid rain can damage buildings, trees, and other structures, and can also harm aquatic ecosystems by lowering the pH of rivers and lakes.

Overall, the principles demonstrated in the Carbon Dioxide and Water Acidity Experiment are relevant to many environmental issues and have important real-life implications.

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100% is the maximum efficiency possible in an energy-conversion process that is not limited by the second law of thermodynamics.

The maximum efficiency possible in an energy-conversion process that is not limited by the second law of thermodynamics is 100%.

However, in reality, no energy conversion process can achieve 100% efficiency due to various factors such as friction, heat loss, and other forms of energy dissipation.

The second law of thermodynamics states that the total entropy (disorder or randomness) of a closed system will always increase over time, making it impossible to convert all of the energy input into useful work output without some energy loss or waste.

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The magnitude of the magnetic field is approximately 1.31 × 10^-3 Tesla.

To find the magnitude of the magnetic field, we can use the formula for the cyclotron frequency:

ω = qB / (2πm)

Where ω is the angular frequency, q is the charge of the proton (1.6 × 10^-19 C), B is the magnetic field strength, and m is the mass of the proton (1.67 × 10^-27 kg).

First, we find the angular frequency ω:

ω = 2π / T

Where T is the time taken to go once around the circle (1.00 × 10^-6 s). So:

ω = 2π / (1.00 × 10^-6 s) ≈ 6.283 × 10^6 rad/s

Now, we can solve for B:

B = 2πmω / q

B = (2π)(1.67 × 10^-27 kg)(6.283 × 10^6 rad/s) / (1.6 × 10^-19 C)
B ≈ 1.31 × 10^-3 T

So the magnitude of the magnetic field is approximately 1.31 × 10^-3 Tesla.

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The empirical formula of 1,6-diaminohexane is C3H8N.

What is the empirical formula of 1,6-diaminohexane with a composition of 62.1% C, 13.8% H, and 24.1% N?

To find the empirical formula, we need to determine the simplest whole-number ratio of atoms in the compound.

First, we can assume a 100-gram sample of the compound. This means that 62.1 grams of the sample are carbon, 13.8 grams are hydrogen, and 24.1 grams are nitrogen.

Next, we need to convert the masses of each element to moles using their respective atomic masses:

   Moles of carbon = 62.1 g / 12.01 g/mol = 5.17 mol

   Moles of hydrogen = 13.8 g / 1.01 g/mol = 13.7 mol

   Moles of nitrogen = 24.1 g / 14.01 g/mol = 1.72 mol

Now, we divide each mole value by the smallest mole value to obtain the simplest whole-number ratio of atoms:

   Carbon: 5.17 mol / 1.72 mol = 3

   Hydrogen: 13.7 mol / 1.72 mol = 8

   Nitrogen: 1.72 mol / 1.72 mol = 1

Therefore, the empirical formula of 1,6-diaminohexane is C3H8N.

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The magnitude of the net gravitational force on the mass at the origin due to the other two masses is 4.50 x 10^-11 N.

Using the equation:  [tex]F = G(m1m2)/r^2[/tex]

where G is the gravitational constant [tex](6.67 * 10^{-11} Nm^2/kg^2)[/tex], m1 and m2 are the masses, and r is the distance between the masses, we can calculate the gravitational force between each pair of masses:

Between the 2 kg mass at the origin and the 4 kg mass at (3 m, 0 m):

[tex]F1 = G * (2 kg) * (4 kg) / (3 m)^2 = 3.73 * 10^{-11} N[/tex]

Between the 2 kg mass at the origin and the 6 kg mass at (0 m, 4 m):

[tex]{F2 = G * (2 kg) * (6 kg) / (4 m)^2 = 2.50 * 10^{-11} N[/tex]

Since the two forces act at right angles to each other, we can use the Pythagorean theorem to find the magnitude of the net force:

[tex]fgrav = sqrt((F1)^2 + (F2)^2) = sqrt((3.73 * 10^{-11} N)^2 + (2.50 * 10^-11 N)^2) = 4.50 * 10^{-11} N[/tex]

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--The complete Question is,  Consider three masses arranged in a 2D coordinate system, with masses of 4 kg and 6 kg located at points (3 m, 0 m) and (0 m, 4 m), respectively, and a mass of 2 kg located at the origin (0 m, 0 m). Assuming the gravitational force between any two masses is given by the equation F = G(m1*m2)/r^2, where G is the gravitational constant, m1 and m2 are the masses, and r is the distance between the masses, what is the magnitude of the net gravitational force fgrav on the mass at the origin due to the other two masses? --

The distance between second-order fringes for the 720-nm wavelength is 1.18 mm, and for the 650-nm wavelength, it is 1.03 mm.

The distance between second-order fringes for two wavelengths, we can use the formula:

δy = λD/d

Where δy is the distance between adjacent fringes, λ is the wavelength of light, D is the distance from the slits to the screen, and d is the distance between the two slits.

For the 720-nm wavelength, we have:

δy = (720 × 10⁻⁹ m)(1.0 m)/(0.61 × 10⁻³ m) = 1.18 mm

For the 650-nm wavelength, we have:

δy = (650 × 10⁻⁹ m)(1.0 m)/(0.61 × 10⁻³ m) = 1.03 mm

The distance between second-order fringes for the 720-nm wavelength is 1.18 mm, and for the 650-nm wavelength, it is 1.03 mm.

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The surface temperature of a newly formed white dwarf can be extremely high, reaching up to 100,000 Kelvin. White dwarfs are the remnants of low- to medium-mass stars that have exhausted their nuclear fuel and shed their outer layers.

However, over time, the temperature will gradually decrease as the star continues to cool down. This cooling process can take billions of years, and the temperature of the white dwarf will eventually stabilize at around 4,000 Kelvin. It is important to note that the exact surface temperature of a white dwarf depends on several factors, including its mass and composition.

As a result, they are very dense and extremely hot when they first form. Over time, white dwarfs will gradually cool and become less luminous.

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All of the ice has melted and converted to liquid form, any additional heat energy transferred to the system will start to increase the temperature of the water.

During the time that the temperature remained constant, the heat energy being transferred to the water and ice mixture was being used to melt the ice. This is because when a substance undergoes a phase change, such as from solid to liquid, the temperature remains constant even though energy is still being transferred to the system.

In the case of melting ice, the heat energy is used to overcome the intermolecular forces holding the solid together and convert it to liquid form. This requires a significant amount of energy, known as the heat of fusion, which is the amount of heat energy required to melt a certain amount of solid at its melting point.

In the case of the experiment mentioned in the question, as heat energy was being transferred to the mixture, the temperature remained constant at the melting point of ice (0°C or 32°F). This indicates that the heat energy being transferred was being used to melt the ice rather than increase the temperature of the water.

Once all of the ice has melted and converted to liquid form, any additional heat energy transferred to the system will start to increase the temperature of the water.

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The refrigerator will absorb 400 cal of energy from the freezer compartment and expel 320 cal of energy into the room per cycle, and it will take about 16 minutes to freeze 500 g of water.

The amount of energy absorbed by the refrigerator from the freezer compartment and expelled to the room during each cycle of operation can be calculated using the formula:

Lv × m, where Lv is the latent heat of vaporization of water (80 cal/g) and m is the mass of water (500 g).

Thus, the refrigerator will absorb 400 cal of energy

(Lv × m = 80 cal/g × 500 g = 400 cal) from the freezer compartment and expel 320 cal of energy (80 cal/g × 400 g = 320 cal) into the room per cycle.

Since one cycle occurs every 10 seconds, it will take about 16 minutes (960 seconds) to freeze 500 g of water, initially at 0°C.

Complete Question:

During  each cycle of operation, how much energy does a refrigerator absorb from the freezer compartment and expel to the room. If one cycle occurs every 10 seconds, how many minutes will it take to freeze 500 g of water, initially at 0°C? (Lv = 80 cal/g)?

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The changes in the mass number A and the atomic number Z of a nucleus that undergoes ß+ decay are b. A is unchanged, Z decreases by 1. ß+ decay, also known as positron emission, occurs when a nucleus loses a particle called a positron.

This particle has the same mass as an electron but has a positive charge. During ß+ decay, a proton in the nucleus is converted into a neutron, and a positron and a neutrino are emitted.

- Mass number (A): Represents the total number of protons and neutrons in the nucleus. Since a proton changes into a neutron, the total number of nucleons remains the same. Therefore, A is unchanged.
- Atomic number (Z): Represents the number of protons in the nucleus. Since a proton changes into a neutron during ß+ decay, the number of protons decreases by 1. Therefore, Z decreases by 1.

The mass number, A, of the nucleus remains unchanged during ß+ decay. This is because the number of protons and neutrons in the nucleus does not change. However, the atomic number, Z, decreases by 1. This is because the nucleus loses a positively charged proton, which is replaced by a neutrally charged neutron.

In ß+ decay, a nucleus undergoes a transformation in which a proton changes into a neutron, and a positron (ß+) is emitted.


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a.64.6 cm is their eyes near point and b.78.9 cm is their far point in normal far point is infinity in prescribed glasses.

Farsightedness, also referred to as hyperopia, is an eye refractive mistake in which light entering the eye is concentrated behind the retina rather than directly on it, impairing vision of close objects.

For the first question, we can use the formula 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. We know that the glasses have a power of 2.75 diopters, so the focal length is

f = 1/2.75 m = 0.364 m. The object distance is do = 2.0 cm = 0.02 m. Solving for di, we get:
1/0.364 = 1/0.02 + 1/di
di = 64.6 cm
So the person's near point is 64.6 cm, which is farther than the normal near point of 25 cm.
For the second question, we can again use the same formula, but this time we know that the power of the glasses is -1.30 diopters, which means the focal length is f = -1/1.30 m = -0.769 m (the negative sign indicates a diverging lens). The object distance is the same as before, do = 2.0 cm = 0.02 m. Solving for di, we get:
-1/0.769 = 1/0.02 + 1/di
di = 78.9 cm
So the person's far point is 78.9 cm, which is closer than the normal far point of infinity.

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The user of the energy-efficient bulb saves $0.37 during 115 hours of use, to the nearest cent.

First, we need to find the energy consumption of both types of lightbulbs over 115 hours:

Energy consumption of the energy-efficient fluorescent lightbulb: 11.0 W * 115 h = 1265 Wh = 1.265 kWh

Energy consumption of the conventional incandescent lightbulb: 40.0 W * 115 h = 4600 Wh = 4.6 kWh

Now, we can calculate the cost of using each type of lightbulb over 115 hours:

Cost of using the energy-efficient fluorescent lightbulb: 1.265 kWh * $0.112/kWh = $0.14208

Cost of using the conventional incandescent lightbulb: 4.6 kWh * $0.112/kWh = $0.5152

The user of the energy-efficient bulb saves:

$0.5152 - $0.14208 = $0.37312

Therefore, the user of the energy-efficient bulb saves $0.37 during 115 hours of use, to the nearest cent.

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Answer:

C

Explanation:

Alpha decay

The new period of rotation when the cable is reeled in is 81.7 seconds.

The initial period of rotation is 182.9 seconds. We can use the principle of conservation of angular momentum to find the new period of rotation when the cable is reeled in.

The initial angular momentum of the system is:

L1 = I1ω1 = (½)(m1)(r1)^2(ω1)

where m1 is the mass of one part of the spacecraft, r1 is the distance from the center of mass to the axis of rotation, and ω1 is the initial angular velocity.

Similarly, the final angular momentum of the system is:

L2 = I2ω2 = (½)(m1)(r2)^2(ω2)

where r2 is the new distance between the centers of mass and ω2 is the final angular velocity.

Since the angular momentum is conserved, we can set L1 = L2 and solve for ω2:

I1ω1 = I2ω2

(½)(m1)(r1)^2(ω1) = (½)(m1)(r2)^2(ω2)

Canceling the common factors and solving for ω2, we get:

ω2 = (r1/r2)^2(ω1)

The period of rotation is given by:

T = (2π)/ω

Substituting the expression for ω2, we get:

T2 = (2π)/ω2

T2 = (2π)/[(r1/r2)^2(ω1)]

T2 = (r2/r1)^2T1

where T1 is the initial period of rotation.

Substituting the given values, we get:

T2 = (53.07 m/87 m)^2(182.9 s)

T2 ≈ 81.7 s

Therefore, the new period of rotation when the cable is reeled in is approximately 81.7 seconds.

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In the diagram with 4 small circles representing the positions of the Moon orbiting around the Earth, spring tides occur when the Moon is in a straight line with the Earth and the Sun. This happens during the full moon and new moon phases, when two of the circles are aligned with the Earth-Sun line.

The spring tides occur when the moon is either in the new moon or full moon phase and is in alignment with the sun and the earth. This causes a stronger gravitational pull on the oceans, resulting in higher high tides and lower low tides. The 4 small circles in the diagram likely represent the positions of the moon during different phases of its orbit around the earth.

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The percentage slip in this case is 3.75% (Option B).

To calculate the percentage slip for a six-pole three-phase squirrel-cage induction motor operating at 60 Hz and running at 1155 rpm, first determine the synchronous speed (Ns) and then use the slip formula:

Ns = (120 * f) / P
where f is the frequency (60 Hz) and P is the number of poles (6).

Ns = (120 * 60) / 6
Ns = 1200 rpm

Now, we can calculate the slip (S) using the formula:

S = (Ns - Nr) / Ns
where Nr is the rotor speed (1155 rpm).

S = (1200 - 1155) / 1200
S = 45 / 1200
S = 0.0375 or 3.75%

So, the percentage slip in this case is 3.75% (Option B).

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If I were to shine the headlights of my automobile onto a screen, I would expect to see an interference pattern known as a "double-slit interference pattern." This is because the two headlights act as two coherent sources of light that produce overlapping waves that either reinforce or cancel each other out, depending on their relative phase.

As a result, the pattern on the screen will consist of alternating bright and dark fringes, with the brightest fringe occurring in the center where the waves reinforce each other completely. This phenomenon is a classic example of wave interference and is commonly used in experiments to study the nature of light.

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When a car is 500 m ahead of you, the distance causes the light to appear as one long, red light. As the car gets closer, the distance between you and the car decreases, allowing you to distinguish the individual red lights that make up the tail lights. This is because the individual lights are placed close to each other on the car, but the distance between you and the car affects how they appear to you.

When a car is 500m ahead of you, its tail lights appear as one long, red light due to the distance making it difficult to differentiate between the individual lights. However, when the car is only 100m ahead, you can clearly see that the tail lights are actually several red lights placed close to each other. This is because the closer proximity allows for better visual resolution and the ability to distinguish individual elements.

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The frequency of the single-frequency horn is 375 Hz, as calculated by the difference between the observed beat frequency of 3.0 Hz when one car is at rest and the other car is approaching at 11 m/s.

We can use the formula for the beat frequency to find the frequency of the horns:

beat frequency = |f₁ - f₂|

where f₁ and f₂ are the frequencies of the two horns. When the second automobile is moving toward the first, the frequency of the sound waves emitted by the second automobile is increased due to the Doppler effect. The frequency of the sound waves emitted by the first automobile remains the same.

Let's assume that the frequency of the horn is f. When the second automobile is at rest, the frequency heard by the driver in the first automobile is also f. When the second automobile is moving toward the first at 11 m/s, the frequency heard by the driver in the first automobile is given by:

f' = f ([tex]v_s_o_u_n_d[/tex] + [tex]v_d_r_i_v_e_r[/tex]) / ([tex]v_s_o_u_n_d[/tex] + [tex]v_s_o_u_r_c_e[/tex])

where [tex]v_s_o_u_n_d[/tex] is the speed of sound in air (approximately 343 m/s at room temperature), [tex]v_d_r_i_v_e_r[/tex] is the speed of the first automobile (0 m/s), [tex]v_s_o_u_r_c_e[/tex] is the speed of the second automobile (11 m/s), and f' is the frequency heard by the driver in the first automobile.

Substituting the given values, we get:

f' = f (343 + 0) / (343 - 11) = 1.008 f

The beat frequency is given as 3.0 Hz. Since the driver at rest hears the beat frequency, we can assume that the difference between the frequencies of the two horns is 3.0 Hz. Thus:

|f - 1.008 f| = 3.0

Simplifying, we get:

0.008 f = 3.0

f = 375 Hz

Therefore, the frequency emitted by the horns is approximately 375 Hz.

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If someone in the Andromeda galaxy had a super-telescope through which they were looking at Earth right now, they would see Earth as it was about 2 ½ million years ago.

This is because the Andromeda galaxy is approximately 2.5 million light-years away from Earth. This means that the light emitted from Earth 2.5 million years ago has only just reached Andromeda, and therefore someone observing from there would be seeing Earth as it was at that time.

It is important to note that due to the vastness of the universe, observing objects from such distances means that we are essentially looking back in time. The light from these distant objects takes time to reach us, and therefore we see them as they were at the time the light was emitted, not as they currently are. This concept is known as “look-back time”.

So, if someone in Andromeda were to observe Earth right now, they would be seeing an image of our planet as it was in the distant past. This is just one example of how the vastness of the universe can impact our perception of time and distance.

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The normal force on a Ferris wheel. When you're at the top of the Ferris wheel and in motion, the normal force N exerted by your seat changes due to the combined effect of your weight mg and the centripetal force needed to keep you moving in a circle.

At the top of the Ferris wheel, the normal force and gravitational force work together to provide the centripetal force. This can be represented by the equation:
N + mg = mv²/r

where N is the normal force, m is your mass, g is the acceleration due to gravity, v is your velocity, and r is the radius of the Ferris wheel.

From this equation, we can see that the normal force N at the top of the Ferris wheel when in motion is:
N = mv²/r - mg

Since the Ferris wheel is in motion, the velocity v will be greater than zero, making mv²/r a positive value. Thus, the normal force N at the top of the Ferris wheel when in motion will be less than the normal force when the Ferris wheel is at rest (which is equal to mg).

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You ran at a speed of 12 km/h.

To calculate the speed at which you ran, we need to use the formula: speed = distance / time. In this case, the distance you ran is 2km and the time it took you is 10 minutes.

First, we need to convert the time to hours as the distance is given in kilometers per hour.

10 minutes = 10/60 hours = 0.1667 hours

Now we can substitute the values in the formula:

speed = distance / time = 2km / 0.1667 hours

This gives us a speed of approximately 12 kilometers per hour (km/h). Therefore, you ran at a speed of 12 km/h.

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The phase difference from the perspective of the observer is zero because the speakers are connected in phase, meaning they vibrate in sync and emit sound waves with the same frequency and wavelength.

Since the observer is equidistant from both speakers and directly in front of one of them, they will perceive the sound as if it is coming from a single point source.

Therefore, there will be no phase difference between the sound waves reaching the observer's ears from the two speakers.

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