A grinding wheel is a uniform cylinder with a radius of 8.65 cm and a mass of 0.350kg .
Calculate its moment of inertia about its center.
Calculate the applied torque needed to accelerate it from rest to 1900rpm in 6.00s if it is known to slow down from 1250rpm to rest in 54.0s .

Answer:

Answer is B

Explanation:

Answer:

B. Frequency

Explanation:

Answer:

C

Explanation:

Copper is a conductor because its valence electrons can move freely from atom to atom.

part a: N= 4.39 x 10^10 photons/second. part b: N = 8.25 photons/second are the answers.

The energy of a photon of wavelength 550 nm can be calculated as follows:

h*c/λ = 6.626 x 10^-34 x 3 x 10^8 / (550 x 10^-9)

wavelength = 3.6 x 10^-19 J.

In one second, a 120-W lightbulb emits energy as visible light in the following amount:

120 x 0.035 = 4.2 W.

As a result, the number of photons emitted per second can be computed as follows:

N = Power/Energy of a photon

N = 4.2/3.6 x 10^-19

N = 1.17 x 10^16 photons/second

PART A: The area of a 4.0-mm diameter pupil is given by the following formula:

A = πr^2

A = π(2.0 mm)^2

A= 3.14 x 4.0 x 10^-6 m^2

The distance from the bulb to the pupil is 2.2 m.

The bulb radiates in all directions, therefore the power per unit area is given by:

P = Power/4πr^2

P = 4.2/(4π(2.2)^2)

P = 0.04 W/m^2

The number of photons striking the pupil per second is determined by the following formula:

N = P*A/E

N = (0.04)(3.14 x 4.0 x 10^-6)/3.6 x 10^-19

N  = 4.39 x 10^10 photons/second

PART B: The bulb is now 1.5 km distant from the pupil.

The power per unit area at this distance is:

P = Power/(4πr^2)

P = 4.2/(4π(1500)^2)

P  = 2.98 x 10^-10 W/m^2.

Using the equation for the number of photons striking the pupil per second,

N = P*A/E

N = (2.98 x 10^-10)(3.14 x 4.0 x 10^-6)/3.6 x 10^-19

N = 8.25 photons/second

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Answer:

Water is polar molecule. ... The ionic compounds are dissolved as these ions attract the hydrogen( negative charge attraacts them) and oxygen (positive charge attracts them) whereas methanol is a polar molecule and forms hydrogen bond with water molecules and hence dissolves.

Explanation:

Answer:

Well, if you look up countries with the highest birth rates, also those countries poverty rates and what class the majority of the people are in then you should have a better understanding. Also, education is not passed through genes it is learned through expirience and being taught. Also being rich vs being poor probably doesn't have that big of an effect either. It is the living conditions.

Explanation:

The forces shaping the short-term future of man, perhaps to the turn of this century, are apparent, and the events are in train. The shape of the world in the year 2000 and man's place therein will be determined by the manner in which organized humanity confronts several major challenges. If sufficiently successful, and mankind escapes the dark abysses of its own making, then truly will the future belong to man, the only product of biological evolution capable of controlling its own further destiny.

please mark in brain list

The question is incomplete as it does not provide options to choose from or any context. instead of this, I will explain how to improve communication skills. improving communication skills takes practice, self-awareness, and a willingness to learn and grow. By focusing on these key areas, you can improve your ability to communicate effectively with others in a variety of settings.

Communication skills refer to the ability to convey information effectively and efficiently to others, both verbally and non-verbally. Effective communication involves active listening, clarity of expression, and an understanding of the message being conveyed.

There are several ways to improve communication skills, including:

Practice: Communication skills can be improved through regular practice. Look for opportunities to communicate with others, and take the time to reflect on your communication style and how you can improve.

Active listening: Effective communication requires active listening skills. Pay attention to what others are saying and ask questions to clarify your understanding.

Nonverbal communication: Nonverbal cues such as body language, eye contact, and facial expressions can convey important messages. Practice being aware of and controlling your own nonverbal cues to enhance your communication skills.

Clarity of expression: Clearly expressing your ideas and thoughts is essential for effective communication. Practice organizing your thoughts and speaking clearly and concisely.

Empathy: Being able to put yourself in someone else's shoes and understand their perspective is an essential communication skill. Practice showing empathy by actively listening and acknowledging the other person's feelings.

Feedback: Seek feedback from others on your communication skills. This can help you identify areas for improvement and refine your communication style.

Therefore, It takes time, effort, self-awareness, and a commitment to learn and develop new abilities to improve communication. You can enhance your capacity to interact successfully with others in a range of circumstances by concentrating on five important areas.

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To calculate the mass of the planet, we can use the formula for the period of a satellite in circular orbit:

T = 2π√(r³/GM)

T is the period of the satellite (in seconds)

r is the radius of the orbit (in meters)

G is the gravitational constant (approximately 6.67430 × 10^(-11) m³/kg/s²)

M is the mass of the planet (in kilograms)

First, let's convert the period of the satellite into seconds. 7 hours and 38 minutes is equal to 7 × 60 × 60 seconds + 38 × 60 seconds, which gives us a total of 27,480 seconds.

Plugging the given values into the formula, we have:

27,480 = 2π√((2.1 × 10^6)³/(6.67430 × 10^(-11) × M))

To solve for M, we can rearrange the equation:

M = ((2.1 × 10^6)³ × 6.67430 × 10^(-11))/(2π)² × (27,480)²

M ≈ 6.042 × 10^24 kg

Therefore, the mass of the planet is approximately 6.042 × 10^24 kg.

From the given information about the satellite's radius (2.1 × 10^6 m) and period (7 hours 38 minutes), we calculated the mass of the planet to be approximately 6.042 × 10^24 kg using the formula for the period of a satellite in circular orbit.

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In general, the sum of the squares of the voltages across individual components may not necessarily be equal to the square of the voltage across both elements combined. It would depend on the nature of the circuit and the relationship between the voltage across the components.

It would depend on the nature of the circuit and the relationship between the voltage across the components. To determine if the sum of the square of the maximum voltages across resistor (R) and inductor (L), Vr^2 and Vl^2 respectively, is equal to the square of the voltage across both elements, Vrl^2, in accordance with equation (2), we need to have more context and information about the specific equation and circuit being referred to. The relationship between Vr^2, Vl^2, and Vrl^2 would depend on the specific circuit configuration and the equations governing its behavior.

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The normal force on the truck to the highway surface is 20,534 N. This force is necessary to balance the weight of the truck and provide the centripetal force required for it to move in a circular path around the curve.

To find the normal force on the truck, we need to consider the forces acting on it while rounding the curve.

The two significant forces involved are the gravitational force (weight) and the centripetal force.

1. Gravitational Force (Weight):

The weight of an object is given by the equation:

Weight = mass × acceleration due to gravity

For the truck:

Mass of the truck (m) = 2000 kg

Acceleration due to gravity (g) = 9.8 m/s²

Weight of the truck (W_truck) = m × g

                       = 2000 kg × 9.8 m/s²

       W_truck   = 19,600 N

2. Centripetal Force:

The centripetal force required to keep an object moving in a circular path is given by the equation:

Centripetal Force = (mass × velocity²) / radius

For the truck:

Mass of the truck (m) = 2000 kg

Velocity (v) = 61.1 mi/h = 27.28 m/s (converted to meters per second)

Radius of the curve (r) = 264 m

Centripetal Force (F_c) = (m × v²) / r

                                       = (2000 kg × (27.28 m/s)²) / 264 m

                                 F_c = 20,534 N

The normal force on the truck to the highway surface is 20,534 N.

This force is necessary to balance the weight of the truck and provide the centripetal force required for it to move in a circular path around the curve.

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Answer:

electromagnet

Explanation:

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Answer:

hi. :)))))))))))))))))))))

Answer:

Red, orange, yellow, green, blue, indigo and violet.

Explanation:

Hope I helped! cute copy and paste ☏ ♡ ☆⋆◦★◦⋆°*•°

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° :. ° . ☆ . . • . ● .° °★ Not sure how to copy and paste? Just right click your mouse and choose copy in options, to release repeat the process and just paste it. No mouse? Select the text with your computer pad and use ctrl c to release, ctrl v. On mobile? Press on your screen and select the text, use the option copy and paste wherever you would like!

⭐ Hii ⭐

➡️ Abbreviation for shades of colors often described as creating rainbows: red, orange, yellow, green, blue, indigo, and violet. Its beginning is sometimes called VIBGYOR in reverse order.

Byy...

Answer: i really don't know bu i recomened you watch josie b asmr she is the best

Explanation:

An atom acquires one or more electrons, which results in the formation of an ion with a negative charge known as an anion. Anions of elements in the second row are frequently utilised in chemical processes involving proton transfer and substitution.

Tetrahedral structures are seen by the oxyanions of second-row elements in their group oxidation states. Olivine minerals, also known as (Mg,Fe)₂SiO₄, contain tetrahedral SiO₄ units; nevertheless, the anion does not have a separate existence inside the mineral since the oxygen atoms in the solid state are surrounded tetrahedrally by cations.

Ate anions are extremely resistant to the loss of CH 3 because they have ionic connections between the core atom and the ligands, which are generated by elements that belong to the first three primary groups. Hypervalent anions, which are obtained from the other second-row elements, have predominantly covalent X-C bonding, which gives them (sometimes marginal) resistance to the effects of ligand loss. Hypervalent anions are obtained from the other second-row elements.

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1.32A is  the current for such a computer if over the course of an 8 hour day, 3.8x104 c of charge pass through a typical computer

What do you mean by current?

A flow of charged particles, such as electrons or ions, through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flow through a surface is how it is described.

Although current and electron flow in the opposing directions, current is the flow of electrons. While electrons move from negative to positive, current moves from positive to negative. The number of electrons that flow across a conductor's cross section in a second determines current.

q ⇒ 3.8x10^4 C i.e. 34000C

t ⇒ 8 hour i.e. 8×60×60 = 28800 s

i ⇒ q/t ⇒ 34000/28800 i.e. 1.32A

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Answer:

A roller coaster:

The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force.

Hope this helps!

Answer:

This

Explanation:

First Law: Newtons first law of motion explains what happens in a car crash because it basically states that the passenger will continue to travel at the same velocity until an unbalanced force acts on he or she. The force that will act upon he or she would be the window, so you should always wear a seat belt!

Second Law: In other words, it states that the force that is applied in the crash is proportional to mass of impacting cars. This means that the bigger the force of impacting cars, the bigger the force applied, which implies a greater destruction.

Third law: Newton's Laws Applied to Collisions. Newton's third law of motion is naturally applied to collisions between two objects. In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction.

Explanation:

I'm corona positive and isolated feeling depressed just logged in to talk someone but people ignoring me thanks for this behaviour got disappointed bye everyone logging out had a great time

Answer:

Folk dance

Explanation:

hope i helped :)

The [tex]$y(x) = Ax^n e^{-\frac{mwx^2}{2h}}$[/tex]  is an approximate solution to the given differential equation.

The given Differential equation is:

[tex]\[-\left(\frac{h^2}{2m}\right) \frac{d^2y}{dx^2} + \frac{1}{2}mw^2x^2y = Ey\][/tex]

Let us calculate the derivatives of [tex]$y(x)$[/tex] with respect to [tex]{x}[/tex]

First derivatives:

[tex]\[\frac{dy}{dx} = Anx^{n-1} e^{-\frac{mwx^2}{2h}} - mwx Ax^n e^{-\frac{mwx^2}{2h}}\][/tex]

Second derivatives:

[tex]\[\frac{d^2y}{dx^2} = An(n-1)x^{n-2} e^{-\frac{mwx^2}{2h}} - 2mwx Anx^{n-1} e^{-\frac{mwx^2}{2h}} - (mwx)^2 Ax^n e^{-\frac{mwx^2}{2h}}\][/tex]

Now, substitute [tex]$y(x)$[/tex] and its derivatives into differential equations:

[tex]\[-\left(\frac{h^2}{2m}\right) \left[ An(n-1)x^{n-2} e^{-\frac{mwx^2}{2h}} - 2mwx Anx^{n-1} e^{-\frac{mwx^2}{2h}} - (mwx)^2 Ax^n e^{-\frac{mwx^2}{2h}} \right] + \frac{1}{2}mw^2x^2 Ax^n e^{-\frac{mwx^2}{2h}} = Ey\][/tex]

Simplifying the equations we get:

[tex]\[e^{-\frac{mwx^2}{2h}} \left[ An(n-1)hx^{n-2} - 2mwx Anhx^{n-1} - (mwx)^2Ax^n + \frac{mw^2}{2}x^2 Ax^n \right] = Ey\][/tex]

Since, [tex]$y(x) = Ax^n e^{-\frac{mwx^2}{2h}}$[/tex] satisfies the differential equation after simplification, we can conclude that it is an approximate solution to the given differential equation.

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The wavelength of the light in nanometers is 321 nm.

The angular position of the nth bright fringe above the central fringe is,

θ = (nλ)/d

where,

θ = angle to the nth bright fringe

λ = wavelength of the monochromatic light

d = distance between the two slits

n = order of the bright fringe

The given values,

θ = 3.21°

n = 3

d = 0.0340mm = 3.4 × 10⁻⁵m

Substituting these values in the above equation,

3.21° = (3λ)/(3.4 × 10⁻⁵m)

λ = (3.21 × 3.4 × 10⁻⁵m)/3

λ = 3.21 × 10⁻⁵m

  = 3.21 × 10⁻⁷m

  = 321 nm

Therefore, the wavelength of the light in nanometers is 321 nm.

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Answer:

i dont know

Explanation:

sorry

Transform plate tectonic boundaries slide/move past each other, rubbing along the edges causing earthquakes, tsunami, landslides

An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.

The answer is c is because when tectonic plates are rubbing against each other that’s how an earthquake is formed.

another reason the answer is C is because when the tectonic plates are moving together it can cause the land to slide.

the last reason the answer is C is because when the tectonic plates in the ocean move it can cause a tsunami.

Hence transform plate tectonic boundaries slide/move past each other, rubbing along the edges causing earthquakes, tsunami, landslides

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Answer:

Hello There!!

Explanation:

The answer is=>Conduction.

hope this helps,have a great day!!

~Pinky~

[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]

Conduction.

Answer:

handle, trigger, spindle

Sz, the z-component of the Poynting vector at (x = 0, y = 0, z = 0) at t = 0 is 0.

A monochromatic electromagnetic wave with wavelength λ = 2.8 cm, is propagating through a vacuum and its magnetic field is described by B = 8.4 sin(2π(1.0 × 10^9)t - 2π(1.0 × 10^4)x) µT.

The Poynting vector can be used to explain this in more detail. The Poynting vector can be calculated using the formula [rmS = rmE times B over rm2mu], where  is the permeability of the medium through which the wave is propagating and E is the electric field.

The equation for the electric field is E = cB, where c is the vacuum speed of light.

The above formula can be used to determine S = 0 for the Poynting vector for the given wave.

The Poynting vector has a z-component of 0 at (x = 0, y = 0, z = 0) and t = 0.

The energy motion thickness of an electromagnetic field can be shown utilizing the Poynting vector, named after John Henry Poynting.

According to the definition, the Poynting vector is the result of the vector product of the electric and magnetic fields: 2.22) S → = E → × H →

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The orbital period of the farther asteroid will be less than twice the orbital period of the closer one.

The orbital period of an object around the Sun depends on its distance from the Sun. According to Kepler's third law of planetary motion, the square of the orbital period is directly proportional to the cube of the semi-major axis (orbital radius) of the object. Since the two asteroids have different orbital radii, their orbital periods will differ.

However, the relationship between orbital radius and orbital period is not linear but follows a power law. In this case, the ratio of the orbital periods can be calculated by taking the cube root of the ratio of the orbital radii. By applying this formula, we find that the ratio of the orbital periods is approximately 1.5874. Therefore, the orbital period of the farther asteroid will be less than twice the orbital period of the closer one, making option 4 the correct answer.

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The requried force on the wire due to Earth's magnetic field will be perpendicular to both the current direction and the magnetic field direction.

According to the right-hand rule, if a current-carrying wire is held in the right hand with the thumb pointing in the direction of the current, the direction in which the fingers curl represents the direction of the magnetic field around the wire.

In this case, the wire is carrying the current vertically downward. If we apply the right-hand rule, we can curl our fingers around the wire in the direction of the magnetic field. The direction of the magnetic field is horizontally perpendicular to the wire, pointing toward the north.

Therefore, the force on the wire due to Earth's magnetic field will be perpendicular to both the current direction and the magnetic field direction. Using the right-hand rule again, if we extend our right-hand thumb in the direction of the current (downward) and curl our fingers in the direction of the magnetic field (northward), our palm will face east. This indicates that the force on the wire will be directed eastward.

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An Otto cycle is used in gasoline engines to convert the thermal energy of burning gasoline into mechanical work. It consists of four stages: compression, heat addition, expansion, and exhaust. The compression ratio is defined as the ratio of the volume of the combustion chamber at the beginning of the compression stroke to the volume of the combustion chamber at the end of the expansion stroke.

Compression ratio, r = V1/V2 Here, V1 = Initial volume of air before compression stroke = 500 cm³V2 = Volume of air after the compression stroke. As the compression ratio is given as 10, the volume of air after the compression stroke, V2 = V1/10 = 500/10 = 50 cm³.

Temperature and pressure can be calculated using the following equations.

PV¹⁴ = Constant (P₁V₁¹⁴) T₁/V₁ = T₂/V₂ (isentropic process)

a) The highest temperature can be found at the end of the combustion stroke.

Here, V3 = V2T3/T2 = V4T4/T3T1V1¹⁴ = V2V3¹⁴ Pmax = T3V3/V2 = T4V4/V3 = P4

b) Amount of heat transferred, Qn = Cn (T4 - T1) Where Cn is the specific heat at constant volume.

Qn = Cn (T4 - T1) = cv (T4 - T1)

c) Thermal efficiency,

η = (Wnet)/Qn = (Qn - Qout)/Qn = 1 - (Qout/Qn) = 1 - (cv (T3 - T2))/(cv (T4 - T1))

d) Mean effective pressure, MEP = (Pmax - Pmin)/2 = (P4V3/V4 - P2V1/V2)/2

The formula for the constant specific heat approach - k-1.4, cp= 1.005 kJ/kg.K cv=0.718 kJ/kg.K, R = 0.287 kJ/kg.K is given below.

Cn = cp/(k-1) = 1.005/(1.4 - 1) = 1.005/0.4 = 2.5125 kJ/kg.Kcv = R/(k-1) = 0.287/(1.4 - 1) = 0.287/0.4 = 0.7175 kJ/kg.K

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