How can 2-phenylethanoic acid can be prepared from toluene?​

Answer:

Approximately [tex]9\; {\rm N \cdot m^{-1}}[/tex].

Explanation:

Change in the gravitational potential energy (GPE) of the system:

[tex](\text{change in GPE}) = m\, g\, \Delta h[/tex], where:

Change in the elastic potential energy (EPE) of the system:

[tex]\text{(change in EPE)} = (1/2)\, k\, x^{2}[/tex], where:

Set [tex]\text{(change in GPE)} = \text{(change in EPE)}[/tex] and solve for the spring constant [tex]k[/tex]:

[tex]\displaystyle m\, g\, \Delta h = \frac{1}{2}\, k\, x^{2}[/tex].

[tex]\begin{aligned}k &= \frac{m\, g\, \Delta h}{(1/2)\, x^{2}} \\ &= \frac{(115)\, (9.8)\, (250)}{(1/2)\, (250)^{2}}\; {\rm N\cdot m^{-1}} \\ &\approx 9\; {\rm N\cdot m^{-1}}\end{aligned}[/tex].

The frictional force acting on the car is equal to the centripetal force, therefore the frictional force = 3200 N.

The force produced when two surfaces slide against and touch each other is called frictional force.

To determine the friction that a car would experience, we need to use the formula for centripetal force:

F = m * (v² / r)

where F is the force required to keep the car moving in a circular path, m is the mass of the car, v is the velocity of the car, and r is the radius of the curve.

In this case, we can substitute the given values to find the required force:

F = 320 kg * (20 m/s)² / 200 m

F = 3200 N

This force is the centripetal force required to keep the car moving in a circular path around the curve. This force is provided by the friction between the car's tires and the road surface. Therefore, the frictional force acting on the car is equal to the centripetal force:

Frictional force = 3200 N

Note that this calculation assumes that the car is traveling at a constant speed around the curve. If the car is accelerating or decelerating, additional forces (such as the force due to braking or acceleration) would need to be considered in the calculation of the frictional force.

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The kinetic theory of matter, which holds that all matter is made up of microscopic particles that are always in motion, can be used to explain this situation.

When the average kinetic energy of the object's particles increases, so does its thermal energy. The thermal energy of an object therefore increases as its temperature does.

Water molecules usually have the highest kinetic energy in the steam phase. Since the gaseous phase of a substance always has the highest kinetic energy of the three states of matter, steam is a gaseous state in which water molecules have the highest kinetic energy.

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Answer:

I agree with Erikson stages of development that all adolescents and young adults pass through the stage

Answer:

153 m

Explanation:

Given:

A = 4m/s^2

V₁ = 45m/s

V = V₀ + at = ( 45 + 4 × 3 m/s) = 57 m/s

2ax = v^2 - v₀^2

∴ x = v^2-v₀^2/2a

=57^2-45^2/2*4

153 m

The distance traveled by the car after 3 seconds is 135 meters. Therefore, option C is correct.

Given:

Initial velocity = 45.0 m/s

Acceleration = 4.00 m/s²

Time = 3.00 s

To calculate the distance traveled by a car after 3.00 seconds, the kinematic equation can be used: [tex]s = ut + \frac{1}{2} at^2[/tex]

Where:

s = distance traveled

u = initial velocity

t = time

a = acceleration

Substituting the values in the formula:

[tex]s = 45\times 3 + \frac{1}{2} \times 4 \times 3^2\\[/tex]

s = 135 + 2 × 9

s = 135 + 18

s = 153 meters

Therefore, this car having an initial velocity of 45m/s and acceleration of 4 m/s² will travel 153 meters in three seconds.

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Answer:

Hey Buddy!

Explanation:

This is ur answer....

Hope it helps!

Brainliest pls!

Have a good day!

Answer:

The total mass of the wood along with the frog is 120π gm.

The mass of the frog is (160/3)π gm.

The volume of the wood that is immersed in water is given by the volume of a cylinder with a radius of 2 cm and a height of 10 cm, which is V1 = π(2cm)²(10cm) = 40π cm³. The mass of the water displaced by this volume of wood is m1 = V1ρ = 40π gm. The mass of the remaining part of the wood above water is m2 = ρV2 = ρ(π(2cm)²(10cm)) = 80π gm.

mTherefore, the total mass of the wood along with the frog is m1 + m2 = 120π gm.

b) After the frog goes into the water, the volume of the wood that is immersed decreases to V3 = (1/3)π(2cm)^2(20cm) = (80/3)π cm^3. The mass of the water displaced by this volume of wood is m3 = V3ρ = (80/3)π gm. Therefore, the mass of the frog is (m1 + m2) - m3 = (120π - (80/3)π) gm = (240/3)π - (80/3)π = (160/3)π gm.

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Blocks of colored instructions are connected to create programs. Scripts are the name for these collection of blocks. They direct on-screen characters in what to do.

Motion can be characterized as a shift in an object's location with regard to time. Motion can be heard in a variety of sounds, such a book sliding off a table, water running from a faucet, rattling windows, etc. There is motion even in the air we breathe! The universe is a moving thing.

Delete your calendars, task lists, and project management software. Motion uses AI to schedule your day and the days of your team! Your projects, tasks, and meetings are required.

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D. Kinetic energy is converted to potential energy.

At point C, the pendulum is at its highest point, and the kinetic energy it has accumulated from the initial release at point A has been fully converted to potential energy. As the pendulum swings back toward point A, it will lose potential energy and gain kinetic energy until it reaches point A once again.

At point A, potential energy is converted to kinetic energy. At point C, the pendulum is at its highest point, and the kinetic energy has been fully converted to potential energy. As the pendulum swings back toward point A, it will lose potential energy and gain kinetic energy until it reaches point A once again.

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The average power output of the student in watts, given that the student can load into a van forty 12.7 kg boxes of copy paper in 5.0 mins is 11.62 Watts

First, we shall obtain the work done by the student in loading the  forty 12.7 kg boxes of copy paper. Details below:

Wd = mgh

Wd = 508 × 9.8 × 0.7

Wd = 3484.88 J

Now, we shall determine the average power output of the student. Details below:

P = Wd / t

P = 3484.88 / 300

P = 11.62 Watts

Thus, the average power output is 11.62 Watts

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The vertical force P that need to be applied to the pedal is 500 N.The corresponding reaction at C is 1300N. The magnitude of the pressure exerted on the three.zero-kg block via the two.0-kg block is eighteen N.

1. a) Taking Moments about C & equating to Zero.

+ ∑M_c = 0 ⇒

P x300 = 1200 x 125 =0

So, P = 500 N.

b) Applying the vertical of equilibrium along horizontal & vertical directions.

+Σ F_x = 0⇒ Cx - 1200 0

                     so,  Cx = 1200 N

+ΣFy = 0 ⇒ Cy - P = 0

                    so, Cy = P = 500N

So, Reaction at C.

[tex]R_c=\sqrt{C_x^2+C_y^2}\\= \sqrt{(1200)^2+(500)^2}[/tex]

= 1300 N.

2. The net force on the two blocks is calculated by applying Newton's second law of motion as shown below;

[tex]\sum F_x = ma\\\\F+m_2gcos\theta - F_{3n} = Fnet\\\\F+m_2gcos\theta - m_{3g} = F_{net}\\\\(30) + (2 * 9.8 * cos 30) - (3 * 9.8) = F_{net}\\\\17.6 N = F_{net}\\\\F_{net} = 18 N[/tex]

Magnitude refers to the size or degree of something, often used in the context of scientific measurements or observations. In physics, magnitude typically refers to the strength or intensity of a physical quantity, such as the magnitude of a force or the magnitude of an electric field. In astronomy, magnitude is used to describe the brightness of celestial objects, such as stars, with a larger magnitude indicating a fainter object.

Magnitude can refer to the size of a number or vector, which is often represented by its absolute value. Magnitude is also a concept in geometry, where it refers to the size or length of a geometric object, such as a line segment or a vector. Magnitude is a useful concept in various fields of study, helping to quantify and compare the size, strength, or intensity of different phenomena.

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Complete Question: -

1. The required tension in cable AB is 1200 N. Determine (a) the vertical force P that must be applied to the pedal, (b) the corresponding reaction at C.

2. The surface of the inclined plane shown is frictionless. If F = 30 N, what is the magnitude of the force exerted on the 3.0-kg block by the 2.0-kg block?

When an object speeds up, it has a positive acceleration

Positive acceleration is the rate at which an object's speed increases over time. It is measured in distance units per time squared (m/s2) and is the result of a net force being applied to an object.

Positive acceleration indicates that an object is accelerating in the same direction as the applied force. When a net force is applied to an object, it changes the velocity of the object in the same direction as the force. The object's velocity will continue to increase until the net force is equal to zero.

At this point, the object is said to be moving at a constant velocity. Positive acceleration occurs when the net force acting on an object is greater than zero, resulting in an increase in the object's speed. This increase in speed is known as a positive acceleration.

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By dividing the number of turns on the primary (Np) by the number of turns on the secondary (Ns), one can determine a transformer's turns ratio (Np/Ns) (Ns). As a result, Np/Ns = 8.66 is roughly the turns ratio.

Using the turns ratio method is a simpler method. By dividing the higher number of turns by the smaller number of turns, you can find a ratio. For instance: A transformer with a turns ratio of 2:1 will have 100 primary turns and 50 secondary turns.

We can instead apply the following formula:

Vs/Vp = Ns/Np Plugging in the values given:

Vs = 24 V

Vp = 208 V

Vs/Vp = Ns/Np

24/208 = Ns/Np

Simplifying:

0.1154 = Ns/Np

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Mary's velocity with respect to John has a magnitude of approximately 5.459 m/s and a direction of approximately 120.7° relative to due south.

A vector quantity that describes the rate of change of any object's position with respect to the time is called velocity.

Component of Mary's velocity vector in the south direction is given by:

[tex]\rm v_{south[/tex] = 10.5 cos(27°) = 9.373 m/s

Component of Mary's velocity vector in the west direction is: [tex]\rm v_{west[/tex] = 10.5 sin(27°) = 4.642 m/s

Mary's velocity vector with respect to the ice can be written as: [tex]\rm v_M/Ice[/tex] = -9.373 m/s (in the south direction) - 4.642 m/s (in the west direction)

[tex]\rm v_J/Ice[/tex] = -6.5 m/s (in the south direction)

[tex]\rm v_M/J[/tex] = [tex]\rm v_M/Ice - v_J/Ice[/tex]

[tex]\rm v_M/J[/tex] = (-9.373 m/s) (in south direction) - (-6.5 m/s) (in south direction) - 4.642 m/s (in west direction)

[tex]\rm v_M/J[/tex] = -2.873 m/s (in the south direction) - 4.642 m/s (in the west direction)

|[tex]\rm v_M/J[/tex]| = √((-2.873 m/s)² + (-4.642 m/s)²) = 5.459 m/s

θ = 59.3°

θ = 180° - 59.3° = 120.7°

Therefore, Mary's velocity with respect to John has a magnitude of approximately 5.459 m/s and a direction of approximately 120.7° relative to due south.

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The image created when an object is placed in front of a plane mirror is virtual, hence it cannot be projected onto a screen. The right response is: virtual, upright, and of the same size as the object.

A virtual picture is created when an object is placed in front of a plane mirror. The distance between the image and the mirror is equal to the distance between the item and the mirror, and the size of the image is the same as the size of the object.

The left side of an object appears to be the right side of its image when it is placed in front of a plane mirror, and the opposite is true for the right side of the object. Lateral inversion is the term for this phenomena.

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Answer:

stable bone

save from sun rays

The speed that the ball hits the balloon is approximately 214.43 m/s.

The velocity-time connection refers to the first motion equation, v = u + it. On the other hand, the position-time connection is denoted by the second equation of motion, s = ut + 1 / 2at2.

The following equation can be used to determine the ball's ultimate velocity:

v_f = sqrt(v_x² + v_y²)

where v_x is the horizontal component of the velocity and v_y is the vertical component of the velocity at the point of impact.

Substituting the given values, we get:

v_i_x = v_i_y = 212 / √(2) = 150.13 m/s

t = v_y / a_y = 150.13/9.8 = 15.31 s

y = v_i_y * t + 0.5 * a_y * t² = 150.13 * 15.31 + 0.5 * (-9.8) * (15.31)² = 1149.59 m

x = v_i_x * t = 150.13 * 15.31 = 2298.52 m

v_f = √(v_x² + v_y²) = √((212/√(2))² + (-9.8 * 15.31)²)

= 214.43 m/s

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Here is a synthesis method for using the Grignard reagent to change cyclopropane into cyclopropanecarboxylic acid: Make cyclopropane into cyclopropanone using ozonolysis or another appropriate process.

Dichlorocarbene is one illustration. The formation of cyclopropanes from these halogenated carbenes is similar to that of methylene, with the intriguing addition of two halogen atoms in lieu of the hydrogen atoms. Although they do not strictly qualify as carbenes, carbeneoids are substances that combine to form cyclopropanes.

Since the addition of carbene and carbenoids to alkenes is a type of cheletropic reaction and occurs in a syn way, cyclopropanation also exhibits stereospecificity.

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a. Total energy is 0.098 J

b. Potential and Kinetic Energies is 0.032 sin^2(8.08t) J

c. Velocity at x is -0.808 sin(8.08t) m/s

d. Potential and Kinetic Energies at x is 0.016 sin^2(8.08t) J

We can use the following formulas for the energy, velocity, and potential and kinetic energies of a simple harmonic oscillator:

where ω = √(k/m) is the angular frequency.

Given that k = 19.6 N/m, A = 0.100 m, x = -(0.100 m) cos 8.08t, and v = (0.808 m/s) sin 8.08t, we can find the values of E, U, and K as follows:

(a) Total Energy:

E = 1/2 k A^2 = 1/2 * 19.6 * 0.1^2 = 0.098 J

(b) Potential and Kinetic Energies:

U = 1/2 k x^2 = 1/2 * 19.6 * (-0.1 cos(8.08t))^2 = 0.098 cos^2(8.08t) J

K = 1/2 m v^2 = 1/2 * (0.1) * (0.808 sin(8.08t))^2 = 0.032 sin^2(8.08t) J

(c) Velocity at x = 0.050 m:

When x = 0.050 m, cos(8.08t) = -0.5, so we have:

v = -ωA sin(ωt) = -ω(0.1) sin(8.08t) = -0.808 sin(8.08t) m/s

(d) Potential and Kinetic Energies at x = A/2:

When x = A/2 = 0.050 m, cos(8.08t) = -0.5, so we have:

U = 1/2 k x^2 = 1/2 * 19.6 * (0.050)^2 = 0.0245 J

K = 1/2 m v^2 = 1/2 * (0.1) * (0.808 sin(8.08t))^2 = 0.016 sin^2(8.08t) J

Note that the sum of potential and kinetic energies at any point in time is equal to the total energy, which is constant.

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Answer:

see below

Explanation:

In chickenpox vaccine , weakened/killed pathogens are introduced into the body to generate immune response. The first response is slow and is called primary response while the subsequent exposure with the same pathogen generates a highly intensified immune response which is known as secondary response .

This type of immunity which generates antibody against the virus particles by introducing them into the body is called active immunity . It lasts forever in the body as the immune system has the memory of first exposure with the pathogen and after coming in contact with the same pathogen it recognises it and generates immune response.

So the correct option would be,

[tex]\rule{200}2[/tex]

Related information:-

Passive immunity:-

It is the type of immunity when performed antibodies are introduced in the body . Like in case of smallpox. This doesn't last long in the body and requires repeated infusions in the body after coming in contact with the same pathogen again.

Also , it is helpful when quick reponse is required against the antigen and we don't have time to wait for generating immune response like in case of snake bites .

The conservation of energy principle, which states that a system's total mechanical energy is conserved in the absence of external forces, will be used to solve this issue. The Earth and the sled rider make up the system in this instance.

The mechanical energy will be constant in a closed system, one in which there are no external dissipative forces at work. In other words, nothing will alter (become more or less). The Law of Conservation of Mechanical Energy is what we refer to as this.

The lone circumstance in which mechanical energys conserved is that all the forces acting on it should be conservative forces.ie no friction or heat loss should be there!!.

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The formula v = sqrt(grs), where v is the speed and g is the radius, can be used to determine the quickest speed at which you can navigate the curve without the book sliding is the acceleration due to gravity, r is the radius of the curve, and μs is the coefficient of static friction.

Static friction is the friction that exists between two objects that are not moving relative to each other, while kinetic friction is the friction that exists between two objects that are moving relative to each other. The force of static friction is typically greater than the force of kinetic friction.

The force of friction between two surfaces is directly proportional to the coefficient of friction, with the equation Ff = μFn, where Ff is the force of friction, μ is the coefficient of friction, and Fn is the normal force between the two surfaces. A higher coefficient of friction means a greater force of friction, and vice versa.

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The matching perspective to the corresponding questions are:

Psychology is the scientific study of the human mind and behavior, exploring topics such as perception, cognition, attention, emotion, motivation, personality, brain function, and social interaction. It encompasses a range of approaches, from studying the biological and neurological underpinnings of behavior to investigating the social and cultural factors that shape our experiences and interactions.

Psychology seeks to understand and explain a wide range of phenomena related to human thought, feeling, and behavior, and to use that understanding to promote individual and collective well-being.

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The complete question:

Match the perspective in Column 1 to the corresponding question in Column 2.

A. Positive psychology At what age do children begin to use language?

B. Biopsychology How do adolescent brains develop?

C. Cognitive psychology How can I lead a happier life?

D. Social psychology How do our thoughts affect our self-concept?

E. Developmental psychology How can we reduce prejudice?

Explanation:

Potential Energy = m g h

400 J   =  8 kg  * 9.81 m/s^2  * h

400 / (8 *9.81) = h = 5.1 m

The time required to achieve the same diffusion results at 500°C for 10 hours at 600°C is approximately 1.1 minutes.

What is Diffusion?

Diffusion is a physical process where molecules or particles move from an area of high concentration to an area of lower concentration. This movement is driven by the natural tendency of molecules to spread out and achieve a state of equilibrium, where the concentration is the same throughout the system. Diffusion occurs in gases, liquids, and solids, and is responsible for a wide range of phenomena, from the movement of oxygen and carbon dioxide in the lungs to the mixing of chemicals in a beaker.

a) The diffusion coefficient of copper-silver penetration at 500°C can be calculated using Fick's first law:

J = -D*(dc/dx)

where J is the diffusion flux, D is the diffusion coefficient, dc/dx is the concentration gradient.

Assuming that copper and silver diffuse independently and the concentration gradient is constant, we can write:

J = -Dc*(dc/dx)

where Dc is the effective diffusion coefficient for copper in silver.

At 500°C, the value of Dc for copper in silver is approximately 2.7 x 10^-11 m^2/s.

b) To determine the time required to achieve the same diffusion results at 500°C for 10 hours at 600°C, we can use the Arrhenius equation:

D2/D1 = exp(-Q/R)*exp((1/T1) - (1/T2))

where D1 and T1 are the diffusion coefficient and temperature at 500°C, D2 and T2 are the diffusion coefficient and temperature at 600°C, Q is the activation energy for diffusion, and R is the gas constant.

Assuming that the activation energy for diffusion is 100 kJ/mol, we can calculate the diffusion coefficient at 600°C:

D2 = D1exp(-Q/R)exp((1/T1) - (1/T2))

= 2.7 x 10^-11 m^2/s * exp(-100000/(8.314500))(1/773 - 1/873)

= 1.3 x 10^-9 m^2/s

Now, we can use Fick's second law to determine the distance traveled by diffusion in 10 hours at 600°C:

x = sqrt(4Dt)

= sqrt(4*(1.3 x 10^-9 m^2/s)*36000 s)

= 0.016 m

To achieve the same diffusion results at 500°C, the same distance must be traveled. Therefore, we can calculate the time required at 500°C:

t = x^2/(4D1)

= (0.016 m)^2/(4*(2.7 x 10^-11 m^2/s))

= 0.019 hours

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An experiment is a research design in which the researcher manipulates one or more variables to observe the effect on another variable, while an observational study involves observing and measuring variables without any manipulation.

In an experiment, the researcher has control over the variables being studied and can isolate the effect of the independent variable on the dependent variable, whereas in an observational study, the researcher cannot control or manipulate variables, and thus cannot establish a cause-and-effect relationship between variables.

Also, in an experiment, participants are usually randomly assigned to different conditions, while in an observational study, participants are typically observed in their natural setting without any manipulation. This allows for more control and precision in an experiment, but also means that the results may not be as applicable to real-world situations as those from an observational study.

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Answer:

R (total) = 14 Ω

V1 = 68,58 V

V2 = 68,58 V

V3 = 51,42 V

I (total) ≈ 8,57 A

I1 ≈ 4,29 A

I2 = 4,28 A

I3 ≈ 8,57 A

Explanation:

Given:

R1 and R2 are connected in parallel

R3 with (R1 and R2) are connected in series

V (total) = 120,0 V

R1 = 16,0 Ω

R2 = 16,0 Ω

R3 = 6,0 Ω

R (total) = R1 + R2 + R3

First, let's find the resistance in (R1 and R2) part

Since R1 = R2, we can use this formula:

R = R1/n (n is the number of resistors, in this case it's 2)

R = 16/2 = 8 Ω

Now, we add this number to R3 and we'll get the total resistance in this circuit:

R (total) = 8 + 6 = 14 Ω

I (total) = V (total) / R (total)

I (total) = 120/14 ≈ 8,57 A

I3 = I ≈ 8,57 A, since it's connected in series with the current source

V3 = I3 × R3

V3 = 8,57 × 6 = 51,42 V

V1 = V2 = V (total) - V3, since it's a parallel connection

V1 = V2 = 120 - 51,42 = 68,58 V

I1 = V1/R1

I1 = 68,58/16 ≈ 4,29 A

I2 = I (total) - I1

I2 = 8,57 - 4,29 = 4,28 A

I hope I did everything correct

Non-count nouns, such as substances or concepts, are often things that are difficult to count or quantify. Like with count nouns like apples or oranges, you cannot count them in discrete units.

Nouns may or may not be countable. One apple, two apples, three apples, etc. are all examples of countable nouns. Uncountable nouns, such as air, rice, water, etc., cannot be tallied. When learning a new word, it is important to determine if it is countable or uncountable and to take note of its placement in a sentence.

It is okay to say "I love fruit" instead of "I love fruits" because "fruit" is generally considered to be an uncountable noun. But, if you refer to a specific kind of fruit, then this word becomes countable: for instance, This region is suitable for citrus fruit cultivation.

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