a 5-foot section of 14"" x 8"" rectangular metal ducting weighs 18 pounds. what would be the weight of a 23-foot section of 14"" x 8"" rectangular duct?

Answer:

A, 0.050 Hz

Explanation:

1) Frequency = speed divided by wavelength

time is 2* 60 = 120 seconds

distance = 6 wave lengths

speed = distance divided by time

speed = 6 wave lengths divided by 120

Hope this helps!

The additional charge that flows to the positive plate from the 8 Volts battery is  12 x 10⁻³ Coulomb's.

We have an uncharged capacitor which is charged in two different ways using battery of two different voltages. Firstly, it is connected to the terminals of a 4.0 V battery, and 12 μc of charge flows to the positive plate. Then, the 4.0 V battery is disconnected and replaced with a 8.0 V battery

We have to determine the Additional charge that flows to the Positive plate from this 8 V battery.

Capacitance is the ability of an object to collect and store energy in the form of an electrical charge. Mathematically -

C = Q/V

According to the question, we have -

Electric potential of battery 1 = V[1] = 4 V

Charge flow from battery 1 to the positive plate = Q[1] = 12 x 10⁻³ C

Electric potential of battery 2 = V[2] = 8 V

Now, using the following relation, we will find Q[2] {Charge flow from battery 2 to the positive plate} →

V[1] / V[2] = Q[1] / Q[2]

Substituting the values -

Q[2] = (12 x 10⁻³ x 8)/4 = 24 x 10⁻³ C

Additional Charge that flowed to the positive plate →

Q[2] - Q[1] = 12 x 10⁻³ Coulomb's

Hence, the additional charge that flows to the positive plate is  \(12\times 10^{-3}\) Coulomb's.

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[ The question given is incomplete, the complete question is -

"An uncharged capacitor is connected to the terminals of a 4.0 v battery,  and 12 μc flows to the positive plate. the 4.0 v battery is then disconnected and replaced with a 8.0 v battery, with the positive and negative terminals connected in the same manner as before. How much additional charge flows to the positive plate" ]

Answer:

\(8.5\frac{m}{s}\)

Explanation:

Use Kinematics:

\(v = v_0 + at\)

\(v = 3 + 1.1 * 5\)

\(v = 8.5 \frac{m}{s}\)

Answer:

sodium

Explanation:

Answer:

sodium

Explanation:

The maximum number of bright spots that can be seen on the screen is 2926.The number of bright spots that can be seen on a screen behind a grating depends on the spacing between the grating lines and the wavelength of the laser.

The formula for calculating the number of bright spots is:

n = (d sinθ) / λ

where n is the number of bright spots, d is the spacing between the grating lines, θ is the angle of diffraction, and λ is the wavelength of the laser.

Without knowing the specific values of d and θ, we cannot calculate the exact number of bright spots that can be seen. However, we can use the formula to determine the possible range of values.

Assuming that the grating has a standard spacing of 1 µm (10^-6 m), the formula simplifies to:

n = (10^-6 m) sinθ / (540 nm)

For small angles of diffraction, sinθ ≈ θ in radians. Therefore:

n ≈ (10^-6 m) θ / (540 nm)

Since the sine function oscillates between -1 and 1, the maximum value of θ is 90 degrees, or π/2 radians. Therefore:

n ≤ (10^-6 m) π / (2 × 540 nm)

n ≤ 2926

So the maximum number of bright spots that can be seen on the screen is 2926. However, this assumes that the grating has a standard spacing of 1 µm and that the angle of diffraction is small. In reality, the number of bright spots may be lower depending on the specific values of d and θ.

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The height of the 5kg mass object with respect to the ground is 2.04m.

Potential energy refers to the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring, as a chemical reactant, or by having rest mass).

Potential energy = mass × height × acceleration due to gravity

According to this question, a 5kg mass has 100 J of potential energy with respect to the ground. The height can be calculated as follows:

100J = 5kg × 9.81 × h

100 = 49.05h

h = 2.04m

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The total time in the air during uniform motion is 10.10 seconds.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 0 m/s

s = 125 m

a = g = 9.8 m/s²

By using the third equation, we can find the time taken to fall to the ground

s = vo . t + 1/2 . a . t²

125 = 0.t + 1/2 . g . t²

1/2 . 9.8 . t² = 125

t² = 250/9.8

t = 5.05 seconds

The total time should be twice

t total = 2t

t total = 2 . 5.05

t total = 10.10 seconds

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Answer:

The length of the x-component of v is 2

Explanation:

Vectors in Two Dimensions

A vector in the plane can be represented as its two components in the rectangular coordinates (x,y), assuming its initial point is the origin (0,0).

The vector plotted in the image provided has the components (-2,5).

The x-component is -2 and the y-component is 5.

The length of the component is the magnitude or absolute value of the x-coordinate, thus the length of the x-component of v is 2

Answer:

The solutions to this exercise is B. 400N

Water has a high heat capacity, allowing it to distribute heat by convection more effectively than air and retain heat during evaporation. It also resists temperature changes better than air due to its low conductivity.

Water's high heat capacity refers to its ability to absorb and store a significant amount of heat energy without experiencing a substantial temperature change. Compared to air, which has a lower heat capacity, water can absorb and retain more heat.

This property makes water an efficient conductor of heat through convection. When water is heated, the molecules gain energy and move faster, causing the water to expand and become less dense. This expansion leads to the upward movement of warmer water, while the cooler water sinks, resulting in the transfer of heat throughout the system.

Additionally, water's heat retention during evaporation contributes to its effectiveness in distributing heat. When water evaporates, it requires energy in the form of heat, leading to a cooling effect. However, the heat absorbed by water during evaporation is released back into the environment when condensation occurs.

This process helps to maintain a stable temperature and prevents rapid fluctuations. Moreover, water has a lower conductivity compared to air, meaning it is a poorer conductor of heat. This low conductivity further contributes to water's ability to resist temperature changes and retain heat.

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The kinetic energy of the moving sled with the given value of mass and velocity is 7.84 × 10³ Joules.

Kinetic energy is simply a form of energy a particle or object possesses due to its motion.

It is expressed as;

K = (1/2)mv²

Where m is mass of the object and v is its velocity.

Given the data in the question;

To determine the kinetic energy of the sled, we substitute our given values into the above expression.

K = (1/2)mv²

K = (1/2) × 20kg × (28.0m/s)²

K = 0.5 × 20kg × 784m²/s²

K = 7840kgm²/s²

K = 7.84 × 10³J

Therefore, the kinetic energy of the moving sled with the given value of mass and velocity is 7.84 × 10³ Joules.

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Answer:1m

Explanation:

2n=0.4m

5n=?

5n×0.4/2n=1m

The position of the image relative to the mirror v = 20cm, position of the image behind the mirror.

Since object is always placed in front of the mirror

Hence, object distance will be negative

Object distance (u) = - 100cm

Focus of a convex mirror is behind the mirror

Hence focal length will be positive

Focal length (f)= + 25cm

Find position of the image

Let the image distance = v

Using formula,

\(\frac{1}{v}\) +\(\frac{1}{u}\) = \(\frac{1}{f}\)

\(\frac{1}{v}\) = \(\frac{1}{f} - \frac{1}{u}\)

\(\frac{1}{v} = \frac{1}{25} - \frac{1}{-100}\)

\(\frac{1}{v} = \frac{1}{25} + \frac{1}{100}\)

\(\frac{1}{v} = \frac{4 + 1}{100}\)

\(\frac{1}{v} = \frac{5}{100}\)

v = \(\frac{100}{5}\)

v = 20cm

Since v is positive

Hence, image is 20cm behind the mirror

Nature of image is Virtual and erect.

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Answer:

0.00012km

Explanation:

I hope this answers your question.

False. The radial velocity method can be used with a wide range of stars, not just limited to white dwarf stars.

The radial velocity method, also known as the Doppler spectroscopy method, is a technique used to detect and study extrasolar planets by measuring the small periodic shifts in the radial velocity of a star caused by the gravitational pull of an orbiting planet.

The principle behind the radial velocity method is based on the Doppler effect, which causes the wavelength of light to shift as a star moves towards or away from us. By analyzing these shifts in the star's spectral lines, astronomers can infer the presence and properties of an orbiting planet, such as its mass, orbital period, and eccentricity.

The radial velocity method is applicable to various types of stars, including main-sequence stars, giant stars, and even some types of white dwarf stars. The choice of target stars depends on several factors, such as their spectral characteristics, stability, and brightness.

Main-sequence stars, which include stars like our Sun, are commonly targeted for radial velocity surveys because they are relatively stable and have well-defined spectral lines. These stars provide a suitable baseline for measuring the small shifts in their radial velocity caused by orbiting planets.

Giant stars, which are more massive and larger than main-sequence stars, can also be studied using the radial velocity method. These stars have broader spectral lines due to their lower surface temperatures and higher surface gravities, which present unique challenges in extracting accurate radial velocity measurements. However, with advancements in spectroscopic techniques, the radial velocity method has been successfully applied to giant stars as well.

While white dwarf stars are also suitable for radial velocity measurements, they pose additional challenges due to their compact size and complex spectra. White dwarfs have high surface gravities, which can cause broadening and blending of spectral lines, making it more difficult to extract precise radial velocity measurements. However, astronomers have developed sophisticated methods to overcome these challenges and have successfully detected exoplanets around white dwarf stars using the radial velocity technique.

In conclusion, the radial velocity method is not limited to white dwarf stars. It is a versatile technique that can be applied to various types of stars, including main-sequence stars, giants, and white dwarfs. By studying the radial velocity variations of stars, astronomers have made significant discoveries in the field of exoplanetary science, expanding our understanding of the prevalence and diversity of planets beyond our solar system.

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Answer:

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. ... For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.

Explanation:

Answer:

0.16239316239316239316239

Explanation:

ang haba nang solve ko dito hehe

Answer:

i honestly do not know the awnser , im just setting up my brainly account

Answer:

Q)32) What is the unit of intensity of sound

Ans)Decibel

Q)33) Relate amplitude and distance to the intensity and loudness of sound

Ans)The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of the sound increases. (i can't find the answer for distance and loudness i can't find it on g....o...o....g....l.....e and my textbook u will have to search it on ur own sorry)

Q)34) What is the pitch of sound

Pitch is the rise and fall of our voice when we speak. It is the characteristic of sound by which we can distinguish the sounds of the same loudness. Types: Pitch is generally of two types, high pitch and low pitch. High Pitch: The higher the frequency of the sound, the higher will be the pitch.

Q)35) How is pitch of sound related to its frequency of sound waves?

The sensation of a frequency is commonly referred to as the pitch of a sound. The pitch of the sound we hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound has a low pitch.

Q)36) Define the Doppler effect?

The apparent change in the frequency of sound due to the relative motion between the source and the observer is called the Doppler effect.

Q)37) Explain why the doppler effect occurs

The Doppler effect, or Doppler shift, occurs when the movement of an observer relative to a source (or vice versa) causes a change in wavelength or frequency.

Sorry i can't find the last one i will try to search it afterwards

Answer:

The answer is B. 5 seconds.

Answer:

A

Explanation:

If it is loooking for a proper question, it wants to know how fast the mouse was going

Answer: The answer for this is A.

Explanation: I know this cause i'm smart and totally didn't copy the other guy just to get points

Answer:

144 Joules

Explanation:

The formula for calculating kinetic energy is KE = 1/2 mv^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity.

Plugging in the given values, we get:

KE = 1/2 * 32 kg * (3 m/s)^2

KE = 1/2 * 32 kg * 9 m^2/s^2

KE = 144 J

Therefore, the kinetic energy of the cat moving at a velocity of 3 m/s south would be approximately 144 Joules.

Answer:

the final velocity of the two blobs after collision is 3.21 m/s.

Explanation:

Given;

mass of first blob, m₁ = 9 kg

mass of the second blob, m₂ = 5 kg

initial velocity of the first blob, u₁ = 5 m/s

initial velocity of the second blob, u₂ = 0

Let the final velocity of the two blobs after collision = v

Apply the principle of conservation linear momentum to determine v;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

9 x 5   +    5 x 0 = v(9 + 5)

45 = 14v

v = 45 / 14

v = 3.21 m/s

Therefore, the final velocity of the two blobs after collision is 3.21 m/s.

Ferromagnetism is a type of magnetism that is observed in materials like iron, nickel, and cobalt. It arises from the alignment of magnetic moments of electrons in a material. Electrons possess a property called spin, which is a measure of their intrinsic angular momentum.

Spin can be either up or down and behaves like a tiny magnet with north and south poles. When a large number of electrons in a material have their spins aligned in the same direction, the material becomes magnetic, exhibiting ferromagnetism. In a ferromagnetic material, the atoms are arranged in a regular pattern, and each atom has its own magnetic moment due to the spin of its electrons. At low temperatures, these magnetic moments align themselves in a particular direction, resulting in a net magnetic moment for the entire material. When an external magnetic field is applied to a ferromagnetic material, it causes the alignment of magnetic moments of electrons to change, resulting in the material becoming magnetized.

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If the amplitude, frequency, tension, or density of the medium changes, then the wavelength and wave speed will be affected.

This statement suggests that altering any of these factors will lead to changes in the characteristics of the wave, specifically its wavelength and speed.Explanation: The amplitude, frequency, tension, and density of the medium are key variables that influence the properties of a wave. By modifying any of these factors, such as increasing the amplitude or changing the tension, it will result in a corresponding alteration in the wavelength and wave speed. Understanding the relationship between these variables is crucial in comprehending how waves behave in different mediums.If the amplitude, frequency, tension, or density of the medium varies, then wave power will be impacted. This statement implies that changes in these factors will affect the intensity or strength of the wave.Explanation: Wave power is determined by several factors, including the amplitude, frequency, tension, and density of the medium through which the wave propagates. Altering any of these parameters will influence the power of the wave. For instance, increasing the amplitude or frequency will result in a more powerful wave, while changing the tension or density of the medium will also affect its strength. Understanding these relationships helps in analyzing wave behavior and its impact on various phenomena.If two or more waves combine, then the resulting wave will exhibit characteristics such as interference, superposition, and beat frequencies. This statement suggests that when waves overlap or merge, specific properties will manifest in the resulting wave.Explanation: When two or more waves combine, they undergo a phenomenon known as wave interference, resulting in a new wave that exhibits unique characteristics. This combined wave showcases properties such as constructive or destructive interference, superposition (the combination of individual wave amplitudes), and beat frequencies (resulting from the interaction between waves with slightly different frequencies). Understanding the characteristics of combined waves is essential in various fields, including acoustics, optics, and signal processing.

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It is true that x-ray diffraction can be used to determine the atomic spacing between crystalline planes in a solid.

X-ray diffraction is a technique that can indeed be used to determine the atomic spacing between crystalline planes in a solid. When X-rays are directed at a crystalline solid, they interact with the electron clouds of the atoms and are scattered in different directions. The scattered X-rays form a diffraction pattern, which can be analyzed to determine the atomic spacing and arrangement in the crystal structure.

X-ray diffraction is a useful tool for determining the atomic spacing between crystalline planes in a solid.

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Answer:

i dont have a clue whats going on but ill act like i do

Explanation:

its a refrence from naruto

Answer:

Năng lượng tăng gấp đôi.

Explanation:

Như chúng ta biết

E = nhf

Năng lượng tỷ lệ thuận với f

Thay đổi về tần số sẽ tương đương với những thay đổi tương tự về Năng lượng

Nếu tần số trở thành hai lần, thì năng lượng sẽ trở thành 2 lần.

Answer:

8550 Joules of energy.

Explanation:

                                                                                             = -8550 J