When I was young and single, there was a woman at my church who found me attractive. She invited me over to her parents’ house for Thanksgiving, and I met her father. Her father looked like me, dressed like me, had the same beard style that I did, and even had the same first name as me. Clearly her positive emotional response to me had something to do with the strong resemblance between me and her father. This situation shows the power of _______ in shaping emotional reactions.

It it takes the rock a time of 3.2 s with an initial velocity of 10 m / s, the height of the cliff is 82.12 m

s = ut + 1 / 2 at²

s = Height

u = Initial velocity

a = Acceleration due to gravity

t = Time

u = 10 m / s

t = 3.2 s

a = g = 9.8 m / s²

s = ( 10 * 3.2 ) + ( 1 / 2 * 9.8 * 3.2² )

s = 32 + 50.18

s = 82.18 m

The equation used to find the solution is an equation of motion. Equations of motion are discovered to describe the position of an object in motion at any given time.

Therefore, the height of the cliff is 82.12 m

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Yes, it is correct to say that if no net impulse is exerted on a system, then no change in the momentum of the system will occur.

Impulse is defined as the instantaneous force applied to the object for a very short duration. It is given by the product of force and time. The expression of the impulse is given by

I =  F × t where ,

F is the force

t is the time

The impulse is also defined as the change in the momentum of the object, that is,

[tex]I=Pf-Pi[/tex] where [tex]Pf[/tex] is the final momentum of the object [tex]Pi[/tex] is the initial momentum of the object

Hence, if the net impulse is zero, therefore

0=[tex]Pf[/tex]=[tex]Pi[/tex]

[tex]Pf[/tex]=[tex]Pi[/tex]

hence the momentum of the object will also not change.

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When the magnitude remains came and the direction changes the particle is moving in a circular motion. Speed is equal to the arc length traveled (S) divided by the change in time (Δ),

A particle travels in a uniform circular motion while maintaining a constant speed. The radius R of the circle sweeps out the angle, and the particle's velocity vector v in the illustration has a constant magnitude but changes direction as it advances from location B to position C.

The isosceles triangles OBC and DEF are identical because OB and OC are perpendicular to the velocity vectors, and as a result, the ratio of the chord BC to the radius R is the same as the ratio of the magnitudes of v to v. The chord BC and the arc BC approach one another as approaches zero, and the chord can be replaced by the arc in the ratio.

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Coal gas is produced by using the following equation: 2C (s) + 2 H,O (g) CH, (g) + CO.

Coal gas is a mixture of methane and carbon dioxide that is created when coke and steam are combined. Gas from coal can be burned as fuel or employed as a catalyst in other chemical reactions.

When heating coal without the presence of air. It generates gas known as coal gas. It creates a substance known as coal tar. Additionally, coke, a solid residue, is created.

Coal gas is a fuel composed of hydrogen, oxygen, and carbon.

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Percentage of the solar constant is received at a location if insolation is measured at 343 w/m2  is 25%.

The flux density, or measuring mean of solar electromagnetic radiation, is the solar constant, represented by the symbol GSC. It refers to the sun irradiation per square meter.

At Earth's separation from the Sun, the light has an intensity of 1372 W/m2 —this is also known as the solar constant,  and the fact that it will not change over the long run.

So it would be 100%

But as mentioned in question Solar Constant is received at a location if insolation is measured at 343

W/m^2

Therefore,

Percentage of the Solar Constant is received = (343 / 1372) × 100

                                                                        = 25 %

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The weight of steel can be pulled across a concrete floor by a winch with a capacity of 450 lbs to 1500 lb.

Around 7850 kg/m3, or 7.85 g/cm3, or 490 lbs/ft3, or 13231 lbs/yd3, is the unit weight of steel. The primary usage of the steel bars is as reinforcement to increase the tensile strength of concrete constructions. The weight of steel is typically expressed in kilogrammes, tonnes, and pounds.

Calculate the amount of steel in the slab as 1% of the concrete volume (0.01 x 7850 x 3 = 236kg):

Using the Thumb Rule Given that steel has a density of 7850 kg/m3, the amount of steel needed for an RCC slab should be 1% of the entire volume of concrete, or 236 kg.

The unit weight of structural steel is taken to be 7850 kg/m3 or 78.50 kN/m3 or 7.85 g/cm3 or 490 lbs/ft3 or 13,231 lbs/yd3 according to IS code and Indian standard.

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The fundamental frequency is 102.06 Hz m/s.

We need to know about the fundamental resonant frequency to solve this problem. When the string is vibrating at its lowest resonant frequency, it should follow the rule

λ = 2L

where λ is wavelength and L is the length of string

The transverse waves on a string also can be defined as

v = √(F . l/m)

where v is velocity, F is string tension, l is the length of string and m is mass

From the question above, we know that

l = 60 cm = 0.6 m

m = 8 g = 8 x 10¯³ kg

F = 200 N

By substituting the following equation, we can calculate the wavelength

λ = 2L

λ = 2 . 0.6

λ = 1.2 m

Find the speed of the wave

v = √(F . l/m)

v = √(200 . 0.6/(8 x 10¯³))

v = 122.47 m/s

Find the frequency

v = λ . f

122.47 = 1.2 . f

f = 102.06 Hz

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45.7 °F  is the Fahrenheit scale reading equal to  3 times that of the Celsius

-4 °F is 1/6 times that of the Celsius

The relationship between temperature in degrees Fahrenheit, F, and degrees Celsius, C, is

F = 1.8°C + 32

Part a.

If F = 6°C, then

6°C = 1.8°C + 32

6°C - 1.8°C = 32

4.2°C = 32

C = 7.62

Therefore, F = 6×7.62 = 45.71

= 45.7 °F (nearest tenth)

Part b.

When F = (1/5)C, then

0.2°C = 1.8°C + 32

0.2°C - 1.8°C = 32

-1.6°C = 32

C = - 20

Therefore, F = 0.2 × -20 = -4

                      =   -4 °F

Celsius and Fahrenheit are two scales won't to measure temperature. The temperature within the centigrade scale will be expressed in degrees Celsius. The temperature within the Fahrenheit scale will be expressed in degrees Fahrenheit. The relation between Celsius and Fahrenheit is proportional.

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The torque about the origin if the force points in (a) the x direction, (b) the y direction, and (c) the z direction are 12; 36; 37.9 respectively

Torque is a twisting force produced by applying a force at a distance from a point. We would need to choose a distance that is perpendicular to the force's direction. We apply the equation to determine torque,

T=Fd

where F is the force and d is the orthogonal distance to a central point.

i. If the force points in the x-direction, we need to use the y-distance to calculate torque.

T=Fxdy

T=12N *1m

T = 12 N.m

ii. If the force points in the y-direction, we need to use the x-distance to calculate torque.

T=Fxdy

T= 12N * 3m

T = 36 N.m

iii. If the force is directed in the z-direction, the straight-line distance from the origin to the point is orthogonal to the force. The magnitude of the distance will be used as the distance value. This may be determined using the equation.

||d||= √ (X2 + Y2)

where X and Y are the x and y coordinates.

T=Fz||d||

T=(12N) (√ (32 + 12)

T = 37.9 N.m

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The watercraft with an initial velocity of 6.4 m/s and an average acceleration of 2.0 m/s2 [s] for 2.5 s will have a final velocity of: 11.4 m/s

The formula for Uniformly varied rectilinear motion (UVRM) and procedure we will use to solve this exercise is:

vf = vi + (a* t)

Where:

Information about the problem:

Applying the final velocity formula, we have:

vf = vi + (a* t)

vf = 6.4 m/s + (2.0 m/s²* 2.5 s)

vf = 6.4 m/s + 5 m/s

vf = 11.4 m/s

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

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The properties of aluminum are as follows:

Elements are pure substances which are composed of the same type of atoms.

Elements are the building block of all forms of matter.

Aluminum one of the known 118 elements.

In the period table, aluminum has the following properties:

In conclusion, aluminum is an element in the periodic table.

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The electromagnetic energy emitted by an excited sodium atom is 3.47 x 10¯¹⁹ joules.

We need to know about electromagnetic energy to solve the problem. The electromagnetic energy of radiated photons can be calculated by wavelength. It can be determined as

E = h . c / λ

where E is energy, h is Max Planck's constant (6.6 x 10¯³⁴ Js), c is the speed of light (3 x 10⁸ m/s) and λ is the wavelength.

From the question above, the given parameter is

λ = 570 nm = 570 x 10¯⁹ m

By using the equation, we can calculate the energy generated from an sodium atom

E = h . c / λ

E = 6.6 x 10¯³⁴ . 3 x 10⁸ / 570 x 10¯⁹

E = 3.47 x 10¯¹⁹ joules

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The frequency of 0.5 kg mass oscillating on a spring with spring constant k = 5 n/m will be 0.50 Hz.

The oscillation of a spring is governed by the following formulas :

ω =  √k/√m

T = 2π/ω = 2π (√m√/k)

f = 1/T = 1/2π(√k/√m)

Here ω represents the angular frequency

T is the time period

And f is the frequency

We can use the third formula to calculate the frequency by putting the given values in it.

f = 1/2π  √k/√m

f = 1/2π √5/√0.5

f = 1/2π x √10

f = 1/2 x 3.16/3.14

f = 0.50 Hz

Hence, the frequency of 0.5 kg mass oscillating on a spring with spring constant k = 5 n/m will be 0.50 Hz.

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When burned with just the stoichiometric amount of air, under conditions where no heat is lost, the temperature range in which it will produce flames is around 2100 K to 2300 K.

Stoichiometric combustion, in which all available oxygen is fully used, is burning without excess or lack of air. The general equation of a stoichiometric combustion can be determined by presuming that nitrogen reacts in extremely small amounts and is discovered after combustion in molecule form.

Stoichiometric or theoretical air is the smallest amount of air required for a fuel to burn completely. Stoichiometric combustion theoretically gives the ideal fuel to air ratio, which reduces losses and gets all of the energy from the fuel; but, in practice, stoichiometric combustion is not possible due to a variety of different variables.

Since heat losses are unavoidable, 100% efficiency is not possible.

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Some of the coal's energy was turned into other forms of energy.

According to the first law of thermodynamics, energy can neither be created nor destroyed but is converted from one form to another. We know that from the first law of thermodynamics, the energy that originally in the coal does not  vanish into thin air but undergoes a conversion.

Thus, want to find out what accounts for the energy of the coal. Thus, we could say that some of the coal's energy was turned into other forms as this is in consonance with the first la of thermodynamics.

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We need photons of wavelength 0.0177 nm

When photons interact with matter, there are four competing processes. Compton scattering is one of them.

A photon can be completely absorbed, and its energy can eject an electron from its host atom at energies of a few eV to a few keV, which correspond to visible light through soft X-rays. This phenomenon is known as the photoelectric effect.

The Compton effect was discovered by Arthur Compton.

The Compton effect is the lengthening of electron-scattered X-ray and other electromagnetic wave wavelengths. It is the fundamental process by which matter absorbs radiating energy.

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J. J. Thompson created an apparatus composed of a sealed glass tube with electrodes of different polarities fixed at each end. By passing a high voltage through the gas in the sealed tube, he was able to create a cathode ray. J.J. Thompson called the particles that makeup cathode rays as negatively charged particles.

In the experiment, the flow of particles was from the negative terminal (cathode) to the positive terminal (anode). He also placed two plates of opposite charges around the cathode rays. The cathode rays were deflected towards the positive place.

J.J Thompson concluded that the cathode rays were composed of negatively charged particles.

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The aqueous solution with a ph of 2.00 is diluted from 1.0 l to 3.0 l.The ph of the diluted solution will be 2.48.

The pH serves as a gauge for a solution's acidity or alkalinity, as well as its hydrogen ion concentration. The pH scale typically ranges from 0 to 14. Acidic aqueous solutions at 25 °C are those with a pH below 7, and basic or alkaline solutions are those with a pH above 7.

Anything that is acidic is below 7.0, while everything that is alkaline or basic is above 7.0. A pH scale that lists the pH values of common substances and ranges from 0 (extremely basic/alkaline) to 14 (very basic/alkaline).

A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution.

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The density of cheese is 1.33 g/cm³ or 1.33 g/mL.

We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as

ρ = m / V

where ρ is density, m is mass and V is volume

From the question above, we know that

m = 44 g

V = 33 cm³

As we know that 1 cm³ is equal to 1 ml, hence the answer will be the same.

By substituting the following parameters, we get

ρ = m / V

ρ = 44 / 33

ρ = 4/3

ρ = 1.33 g/cm³

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The average acceleration of the ball, while it is in contact with the wall, is -3969.27 m/s².

Acceleration is the rate of change of velocity per unit of time. Its S.I. unit is m/s². It is equal to the change in velocity divided by the time taken to change the velocity.

Acceleration a =  Change in velocity/ Time taken

Given in the question

Initial Velocity = u = + 20.6 m/s ( towards the wall is positive direction )

Final Velocity = v = - 11.948 m/s (away from the wall is negative direction)

Change in Velocity = Final Velocity - Initial Velocity

                                = (- 11.948) - ( + 20.6)

                                = -11.948 - 20.6

                                = -32.548 m/s

So Change in velocity = 32.548 m/s

Time Taken = Time of contact with the wall

                    = 0.0082 seconds

Put in the Formula: a =  Change in velocity/ Time taken

a = -32.548/0.0082

a = -3969.27 m/s²

Therefore the average acceleration of the ball, while it is in contact with the wall, is -3969.27 m/s².

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The stopping distance for a car traveling at a velocity of 20 m/s and acceleration of -4 m/s^2 is 50 m.

The above situation is a case of motion in one dimension, which is governed by the following equations,

V = u + at ..........(i)

V^2 - u^2 = 2as ..........(ii)

S = ut + 1/2 at^2 .........(iii)

As we are given the initial velocity, the final velocity, and the acceleration, therefore we have to apply the second equation to get the answer

v^2 - u^2 = 2as

Here v is the final velocity = 0 m/s

u is the initial velocity = 20 m/s

a is the acceleration = -4 m/s^2

And s is the distance traveled by car

Putting the given values in the above equation,

(0) ^2 - (20)^2 = 2(-4)s

-400 = -8s

S = 50 m

Hence, The stopping distance for a car traveling at a velocity of 20 m/s and acceleration of -4 m/s^2 is 50 m.

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Answer:

Доброе утро, ответ 5+5="4

Explanation:

The entropy change when 2.00 kg of water at 100°C is heated to form steam at 100°C is 12.1kJ/K.

Entropy is a metric for a system's unpredictability or disorder. The mass of a system affects the value of entropy. It has units of joules per kelvin and is represented by the letter S. The value of entropy can be either positive or negative.

Total energy change = latent heat of of vapourization × mass

Total energy change = [tex]2.26[/tex] × [tex]10^{6}[/tex] × 2

Total energy change = 4520kJ

Now, entropy change is given as:

Δ[tex]S = \frac{Total energy change}{Temperature}[/tex]

Δ[tex]S = \frac{4520}{273.15+100}[/tex]

Entropy = 12.1kJ/K

Therefore, the entropy change when 2.00 kg of water at 100°C is heated to form steam at 100°C is 12.1kJ/K.

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When pressure is decreased, a substance is more likely to undergo an expansion process.

The total applied force per unit of area is known as the pressure.

The pressure depends both on externally applied force as well the area on which it is applied.

For constant pressure, the pressure of a substance would decrease with the increase in volume which clearly represents the process of expansion.

Thus, when pressure is decreased, a substance is more likely to undergo an expansion process.

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A company can calculate its profit by using the foreign currency exchange rates prevailing in the market. The cost incurred in foreign currency can be converted into domestic currency first. The spot rates prevailing in the market can be used for such conversion. Once the expenses are converted into the domestic currency, the profits can be computed in the normal manner as now both the revenues and the cost are in domestic currency.

Foreign Exchange Rate is defined as the cost of the residential currency with regard to another currency. The reason of foreign trade is to compare one currency with another for appearing their relative values.

Foreign exchange rate can also be said to be the rate at which one currency is traded with another or it can be said as the price of one currency that's expressed in terms of another currency.

Exchange rates of a currency can be either fixed or floating. Fixed trade rate is decided by the central bank of the nation whereas the floating rate is decided by the flow of market request and supply.

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Answer:

V = IR

V = voltage = 9 volts

I = current

R = resistance = 18 ohms

V = IR

9 = I·18

The magnitude of the resultant displacement of your boat will be 33.5 m

Displacement is the distance travelled in a specific direction. It is a vector quantity and it is measured in meter.

If starting from one shore you row a boat across a narrow river to the other shore. the river is 30.0 m wide as u row the river current moves your boat down the river a distance of 15.0 m

The resultant displacement of your boat can be calculated by using Pythagoras theorem.

The horizontal component = 15 m, while the vertical component = 30 m

The magnitude of the resultant displacement D = √(x² + y²)

D = √(15² + 30²)

D = √(225 + 900)

D = √1125

D = 33.5 m

Therefore, the magnitude of the resultant displacement of your boat will be 33.5 m

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The distance traveled by the puck is 0.203 m.

This can be defined as the length between two points.

To calculate the distance which the puck accelerate, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the distance traveled by the puck is 0.203 m.

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The addition operation of the given figures is determined as 19.95 m in 4 significant figure.

A significant figure is a figure or a digit that contributes to how accurately something can be measured.

The given values;

2 m ------> 1 significant figure

9.35 m ---------> 3 significant figure

8.6 m -------------> 2 significant figure

Addition operator in mathematics is denoted by the symbol "+" and it implies summing the giving digits together.

2 m + 9.35 m + 8.6 m = 19.95 m (4 significant figure).

Thus, the addition operation of the given figures is determined as 19.95 m in 4 significant figure.

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A diode that has the iso=10 fa and a built-in voltage of 0.8 v, its reverse basis for 10v is 36.7fA

As rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators, diodes are a versatile electrical component.

A diode’s propensity to transmit electric current solely in one direction is its fundamental characteristic.

An electrical device with two terminals is a diode. A semiconductor, most frequently silicon but occasionally germanium, is used to create diodes.

There are many different kinds of diodes, but the ones being addressed here include the silicon-controlled rectifier, TRIAC, transient voltage suppressor, Zener, rectifier, and Schottky diodes.

A diode’s most frequent use is to permit an electric current to flow in one direction while blocking it in another. This is known as the diode’s forward direction.

It is provided that

Vr = 10V

ϕj = 0.8 V

Iso = 10fA

The reverse current Is

Is = Iso sqrt [1 + Vr/ϕj]  → 1

Substituting all the values provided in question to equation 1, we have

Is = 10fA sqrt (1+10/0.8)

=(10fA) sqrt (13.5)

= 36.7fA

Thus Is = 36.7fA

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