An electron moving through an electric field of 400 N/C and a magnetic field of .15 T experiences no net force. The two fields and the direction if motion are all mutually perpendicular. Calculate the speed of the electron.

The negative plate is the one facing us because the electric field between the plates is zero, which can only happen if the two plates have the same magnitude and opposite sign of charge density.

Charge density is the amount of electric charge per unit area or per unit volume of a material or object. It is usually denoted by the symbol ρ and is measured in units of coulombs per square meter (C/m²) or coulombs per cubic meter (C/m³).

In the case of a charged plate, the charge density is the total charge on the plate divided by its surface area. For example, if a plate has a charge of 60 µC and an area of 2 m², then the charge density is:

Charge density = 60 µC / 2 m² = 30 µC/m²

Charge density is an important concept in electrostatics, as it is used to describe the distribution of electric charge over a surface or within a volume. It is also used in the calculation of electric fields and forces in electrostatics, as the electric field depends on the charge density of the objects producing the field.

Two large, charged plates with charge density ±30µC/m² facing each other with a separation of 5.0 mm.

One of the plates has a negative charge density.

We want to find out which plate is negative

1. Calculate the total charge on one of the plates using the charge density and the area of the plate:

Q = ±30 µC/m² * A

Here, A is the area of one of the plates.

2. Calculate the electric field due to each plate using Coulomb's law:

E = (1/4πε₀) * (Q / r²)

Here, r is the distance between the plates, which is 5.0 mm or 0.005 m.

ε₀ is the permittivity of free space, which is a constant and has a value of 8.85 x 10⁻¹² F/m.

Since there are two plates, calculate the electric field due to each plate and then take the difference between them to get the net electric field between the plates.

3. Substitute the values and calculate the electric field due to each plate:

E1 = (1/4πε₀) * (Q / r²)

E2 = (1/4πε₀) * (Q / r²)

Here, E1 is the electric field due to one plate, and E2 is the electric field due to the other plate. Since the plates have the same magnitude of charge density, their charges will have the same magnitude too, so we can drop the absolute value sign in Coulomb's law.

4. Subtract the electric field due to one plate from the electric field due to the other plate to get the net electric field:

E = E1 - E2

E = 0

Since, the net electric field is zero, this means that the electric field due to one plate is equal in magnitude and opposite in direction to the electric field due to the other plate. Therefore, the plates must have the same magnitude of charge and opposite signs of charge density.

5. Since, one of the plates has a negative charge density is known, this means that the negative plate is the one facing us. Therefore, the negative plate is the one that we were asked to identify.

Therefore, the negative plate is the one facing us.

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The horizontal rope is tied to a 50kg box on frictionless ice. The tension in the rope if the box moves at a steady 5m/s is zero.

Tension is defined as a type of pulling force when an external force acts at one of the ends of the rope and the force appears all along the length of the string/rope. The tension of the string acts in the opposite direction of the external force. The tension in the rope due to the box is given as, T= ma, as it is a frictionless surface. The mass of the box, m= 50kg. The velocity of the box, v=5m/s. Since the box moves with a steady speed, the velocity of the box is constant. If a body moves with a constant speed or constant velocity, then the acceleration of that body is zero, i.e. the body has no acceleration. Since, a=0 m/s², the value of ma= m×0= 0 N. So, the tension in the horizontal rope due to the 50kg mass moving at a constant speed of 5.0m/s is zero.

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To find the equivalent capacitance of the combination, we can use the formula for capacitance in a series circuit and a parallel circuit.

let's find the capacitance of the two capacitors C2 and C3 in parallel. The capacitance in parallel is given by:

C23 = C2 + C3 = 5.00 µF + 4.00 µF = 9.00 µF

Next, let's find the capacitance of the capacitors C1 and C23 in series. The capacitance in series is given by:

1/C123 = 1/C1 + 1/C23

Substituting the values, we get:

1/C123 = 1/15.0 µF + 1/9.00 µF

Simplifying, we get:

1/C123 = (3/45 + 5/45) µF^-1 = 8/45 µF^-1

Therefore, the capacitance of the combination is:

C123 = 45/8 µF = 5.625 µF

So the equivalent capacitance of the combination is 5.625 µF.

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Kartianna has thus performed 240,000 joules of work while pushing the lawn mower.

Kartianna's work can be calculated using the following formula:

work = force multiplied by distance multiplied by cos (theta)

where:

We can assume that Kartianna is pushing the lawn mower in a straight line in this case, so the angle theta between the force and displacement is 0 degrees, and the cosine of 0 degrees is 1.

As a result, Kartianna's total amount of work is:

work = force multiplied by distance multiplied by cos (theta)

300 N x 800 m x cos work (0)

240,000 joules = work (J)

Kartianna has thus performed 240,000 joules of work while pushing the lawn mower.

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The formula used to find the theoretical moment of inertia for a disk is: I = (1/2)MR^2, where I is the moment of inertia, M is the mass of the disk, and R is the radius of the disk.

This formula is derived from the definition of moment of inertia, which is the resistance of an object to rotational motion. For a disk, the mass is distributed evenly around the central axis, making it a perfect example of rotational symmetry.

Using calculus, we can determine that the moment of inertia is proportional to the mass and the square of the distance from the axis of rotation. This is where the (1/2)MR^2 term comes from in the formula. By using this formula, we can calculate the theoretical moment of inertia for any disk given its mass and radius.

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To convert energy in electron volts (eV) to kilojoules per mole (kJ/mol), you can use the following conversion factor: 1 eV = 96.485 kJ/mol

In physics, an electron volt is the measure of an amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum

To convert a given energy in eV to kJ/mol, you simply need to multiply the energy in eV by the conversion factor.

For example, let's say we want to convert an energy of 5 eV to kJ/mol. We can use the conversion factor to get:

5 eV x (96.485 kJ/mol / 1 eV) = 482.425 kJ/mol

Therefore, 5 eV is equivalent to 482.425 kJ/mol.

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When a boxer is moving away from a punch, the force experienced is reduced because the impact time, or the duration of the impact, is increased.

When an object is in motion and is suddenly subjected to a force, the magnitude of the force depends on both the strength of the force and the time over which it is applied. The longer the impact time, the lower the average force experienced by the object.

By moving away from the punch, the boxer effectively increases the impact time, spreading out the force of the punch over a longer period of time and reducing the average force experienced. This is similar to the idea of a "glancing blow," in which a moving object experiences a reduced force if it is only partially hit, as opposed to being hit head-on.

This is why boxers often move away from punches and try to dodge them, rather than trying to absorb them head-on. By reducing the force of the punch, they can avoid being knocked out or seriously injured, and can stay in the fight.

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To calculate the pH of a hydrochloric acid solution with a molar concentration of 0.0045 M, we can use the following formula:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in the solution, which can be calculated from the dissociation of HCl:

HCl → H+ + Cl-

The molar concentration of H+ is equal to the molar concentration of HCl, which is 0.0045 M.

[H+] = 0.0045 M

Substituting this value into the pH formula, we get:

pH = -log(0.0045) ≈ 2.35

To calculate the pOH of the solution, we can use the relationship:

pH + pOH = 14

pOH = 14 - pH ≈ 11.65

Finally, we can use the relationship between pH, pOH, and the ion product constant of water (Kw) to calculate the concentration of hydroxide ions ([OH-]) in the solution:

Kw = [H+][OH-] = 1.0 × 10^-14 M^2

[OH-] = Kw / [H+] = (1.0 × 10^-14) / (0.0045) ≈ 2.22 × 10^-12 M

Therefore, the pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately 2.22 × 10^-12 M.

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The pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately [tex]2.22 \times 10^{-12} M[/tex].

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in the solution, which can be calculated from the dissociation of HCl:

HCl → H+ + Cl-

The molar concentration of H+ is equal to the molar concentration of HCl, which is 0.0045 M.

[H+] = 0.0045 M

Substituting this value into the pH formula, we get:

pH = -log(0.0045) ≈ 2.35

To calculate the pOH of the solution, we can use the relationship:

pH + pOH = 14

pOH = 14 - pH ≈ 11.65

Finally, we can use the relationship between pH, pOH, and the ion product constant of water (Kw) to calculate the concentration of hydroxide ions ([OH-]) in the solution:

[tex]Kw = [H+][OH-] = 1.0 \times 10^{-14} M^2\\[OH-] = Kw / [H+] = (1.0 \times 10^{-14}) / (0.0045) ≈ 2.22 \times 10^{-12} M[/tex]

Therefore, the pH of the hydrochloric acid solution is approximately 2.35, the pOH is approximately 11.65, and the concentration of hydroxide ions is approximately [tex]2.22 \times 10^{-12} M[/tex].

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Answer:

Explanation:

a. The direction of the force on the proton can be determined using the right-hand rule for magnetic fields. If the right hand is oriented such that the fingers point in the direction of the magnetic field (from north to south in this case) and the thumb points in the direction of the proton's velocity (to the right in this case), then the palm of the hand will point in the direction of the force on the proton. Using this rule, we can see that the force on the proton points downward, as shown in the diagram below:

     N

      |

 <----|---->

 |    |    |

 |    |    |

 |____|____|

      |

      S

b. The magnitude of the force on the proton can be calculated using the formula:

F = qvB

where F is the magnitude of the force, q is the charge of the particle, v is its velocity, and B is the magnetic field strength. For a proton, which has a charge of +1.6 x 10^-19 coulombs, the magnitude of the force is:

F = (1.6 x 10^-19 C)(5.6 x 10^3 m/s)(0.55 T) = 4.5 x 10^-14 N

Therefore, the magnitude of the force on the proton is 4.5 x 10^-14 N.

Retest the carts after adding masses to each one until they are all the same mass.

What are dynamic carts ?

Dynamic carts features a strong steel body to withstand rough handling and three low friction ball bearing wheels with matching axles to ensure they travel along a true line without deviation to give accurate data.

Each cart weighs about 1.5 kg. To move a brick or any other bulk, the ends of the cart raise above the bed, and the cart bed is covered with a rubber pad. There is a clip where a tape can be attached at one end of the cart. Since the pins on each cart fit into the holes on the others, stacking them together doubled the mass.

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Answer:

Explanation:

(4.8 m/s)t = 1/2(2.2 m/s²)t²

2(4.8 m/s)t / (2.2 m/s²) = t²

2(4.8 m/s) / (2.2 m/s²) = t²/t

t = 4.36 s

A.  total time it takes to catch up to friend = 4.36s + 2s = 6.36s    (took her 2 sec to hop on the bike and get going)

B. Distance she travels is the same distance the friend travels in 4.36 s = (4.8 m/s)(4.36 s) = 1/2(2.2 m/s²)(4.36 s)² = 20.9 m

A sidereal day, and it is 23 hours, 56 minutes, and 4.09 seconds.

Seconds are a unit of time that is equal to one sixtieth of a minute. It is represented by the symbol "s", and is one of the most commonly used units of time. Seconds are used to measure the duration of events, as well as the intervals between them. They are also used to measure the speed at which objects move or the rate of change of a physical or chemical process. Seconds are used in many scientific and technical fields, as well as everyday life.

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The time it takes for the celestial sphere to rotate once relative to the earth is called The sidereal day.

The sidereal day is the length of time it takes the Earth, in relation to the "fixed" stars, to complete one rotation around its axis. When we say that the stars are "fixed," we mean that we treat them as though they were fastened to a fictitious celestial sphere located a great distance from Earth.

The foundation of solar time is the synodic day, which is the length of time it takes for a celestial object to revolve once in reference to the star it is circling.

The synodic day is the length of time it takes for a planet to complete one rotation around the object it is orbiting. The synodic day, or solar day, for Earth is roughly 24 hours long. Because the earth orbits the sun and the moon cycles through its phases at the same time, the synodic month is longer than the sidereal month.

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CCD cameras are better astronomical detectors than the human eye for several reasons: their quantum efficiency is higher, they can observe at wavelengths beyond the visible and the integration time can be longer.

First, their quantum efficiency is higher, meaning they are able to detect a larger percentage of the photons that enter the camera. Second, they can observe at wavelengths beyond the visible, such as infrared and ultraviolet, which are not visible to the human eye. However, CCD cameras cannot turn photons into protons, as photons and protons are two different types of particles. Finally, the integration time of a CCD camera can be longer than the exposure time of the human eye, allowing for more photons to be detected and resulting in a better signal-to-noise ratio in the final image.

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Choose all that apply. CCD cameras are better astronomical detectors than the human eye because

Choose one or more:

A. their quantum efficiency is higher.

B. they can observe at wavelengths beyond the visible.

C. they can turn photons into protons.

D. the integration time can be longer.

Answer:

Part A: The boundary being described in the passage is a convergent boundary, where two tectonic plates are colliding. The two plates involved are the Indian plate and the Eurasian plate.

Part B: The geologic process that led to the formation of the Himalaya Mountains began around 80 million years ago when the Indian subcontinent collided with the Eurasian plate. The Indian plate was driven beneath the Eurasian plate, causing the uplift of the Eurasian plate and the subsequent formation of the Himalaya Mountains. This collision continues today, as the Indian plate continues to push under the Eurasian plate, causing the mountains to continue to rise. The process of one plate being driven beneath another is called subduction, and it is a common process that forms mountain ranges around the world.

1 newton is equal to approximately 0.225 pounds.

The newton (N) and pound (lb) are both units of force, with the newton being the standard unit in the International System of Units (SI) and the pound being commonly used in the United States and United Kingdom. The conversion between the two units is not straightforward as they are based on different reference points.

However, using the conversion factor of 1 N = 0.225 lb, we can find out that one newton is equivalent to approximately 0.225 pounds. This means that if a force of 1 newton is applied, it would be equivalent to a force of 0.225 pounds.

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The initial potential energy of the diver is [tex]20,507.4 J[/tex],  The final kinetic energy of the diver is [tex]1/2 (79 kg) \times (18.77 m/s)^2 = 14,030.3 J, C[/tex]. The velocity of the diver just before hitting the water is approximately [tex]18.77 m/s.[/tex]

To resolve this issue, we can make use of energy conservation concepts. The diver only has potential energy at the beginning of the jump, which is transformed into kinetic energy as the diver falls toward the water.

A. The initial potential energy of the diver can be calculated as:

potential energy [tex]= mgh[/tex]

Where m is the mass of the diver (79 kg), g is the acceleration due to gravity [tex](9.8 m/s^2)[/tex] And h is the height of the diving board (27 m).

Therefore, potential energy [tex]= (79 kg) \times (9.8 m/s^2) \times (27 m) = 20,507.4 J[/tex]

The initial potential energy of the diver is [tex]20,507.4 J.[/tex]

B. All the initial potential energy has been transformed into kinetic energy right before the diver reaches the water. As a result, the diver's total kinetic energy can be determined as follows:

final kinetic energy [tex]= 1/2 mv^2[/tex]

Where v is the diver's speed shortly before entering the water, and m is the diver's mass (79 kg).

We can compare the initial potential energy to the final kinetic energy by applying the law of conservation of energy:

[tex]mgh = 1/2 mv^2[/tex]

Solving for v, we get:

v = [tex]\sqrt{2gh}[/tex]

Where sqrt means square root.

Plugging in the values, we get:

[tex]v = sqrt(2 x 9.8 m/s^2 x 27 m) = 18.77 m/s[/tex]

The final kinetic energy of the diver is [tex]v = sqrt(2 x 9.8 m/s^2 x 27 m) = 18.77 m/s[/tex]

C. The velocity of the diver just before hitting the water is approximately

[tex]18.77 m/s.[/tex]

Therefore, The velocity of the diver just before hitting the water is approximately [tex]18.77 m/s.[/tex]

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If a ball is tossed up into the air, then its potential energy is greatest when it reaches the top of its flight. So the correct option is Option B.

Potential energy is defined as energy by virtue of its motion. The potential energy of any object at a given time is determined by the relative position of that object at that specific time interval. The ball was tossed straight up from the air. When it just leaves the hand, it has some velocity. So the ball at that specific time interval has maximum kinetic energy and zero potential energy. Then as the ball moves up, its velocity goes on decreasing. So according to the law of conservation of energy, the kinetic energy stored in the ball gets converted into potential energy. Now when the ball has reached its maximum height in its trajectory, now the velocity of the ball at the greatest height becomes zero. So now the ball has zero kinetic energy and maximum potential energy.

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The term "spectrum" refers to a range of different colors, frequencies, or wavelengths.

It is often used to describe the visible spectrum of light, which is made up of different colors that we can see, such as red, orange, yellow, green, blue, and violet. The spectrum can also refer to other types of electromagnetic radiation, such as radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays.

In addition to its use in the field of physics, the term "spectrum" can also be used more generally to describe a range of different things or qualities. For example, one might talk about a spectrum of political beliefs, a spectrum of emotions, or a spectrum of musical styles.

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The statement which is true about stars that produce similar spectral patterns is true that the stars have about the same size. Thus, the most valid option for this question is B.

Spectral patterns may be defined as a type of arrangement that can be utilized in order to identify the atoms, elements, or molecules present in a star, galaxy, or cloud of interstellar gas.

If we disintegrate the incoming rays of light from a celestial source with the help of a prism, we will very frequently observe a spectrum of colors that are passed with discrete lines. Stars of identical size, temperature, composition, appearance, and other attributes have similar spectra and are categorized into an identical and similar spectral classes.

Therefore, the statement which is true about stars that produce similar spectral patterns is true that the stars have about the same size. Thus, the most valid option for this question is B.

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The acceleration of a bike which increases its speed from 0 to 40 ft/s in 4 seconds will be 3 m/s².

Given, initial speed (u) = 0

Final speed (v) = 40 ft/s = 12 m/s

Time taken = 4 seconds

From the equation v = u + at, we have

12 = 0 + a x 4

12 = 4a

a = 3 m/s²

The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in meters per second squared (m/s²). Since acceleration is a vector quantity, both its magnitude and its direction are included.

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The reason behind the terrestrial planets denser than Jovian planets are  gravity compresses terrestrial planets to a higher degree, making them denser. (option d)

The terrestrial planets formed closer to the Sun in the inner solar system, where the protoplanetary disk was hotter and denser. This meant that only the most massive and dense materials, such as metals and rock, could condense and form planets.

In mathematical terms, the density of a planet can be expressed as its mass divided by its volume:

density = mass/volume

The mass of a planet depends on the amount of material it contains, while the volume of a planet depends on its size and shape. The more massive a planet is, the greater its gravitational pull, which can cause the planet's materials to compress and increase its density.

Overall, the density of a planet is determined by a complex interplay of factors, and while terrestrial planets tend to be denser than Jovian planets, there are exceptions to this rule.

Hence option (a) is correct.

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Having clean teeth prevents you from getting diseases such as the flu and cholera. Therefore, the correct option is option A.

The study the tooth structure is the focus of the anatomical discipline known as dental anatomy. Dental occlusion, or the contact between teeth, is not included in its field of study, but rather the development, appearance, as well as categorization of teeth are.

Because it deals with naming teeth and their structures, dental anatomy also serves as a taxonomic science. Having clean teeth prevents you from getting diseases such as the flu and cholera.

Therefore, the correct option is option A.

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The reading on the ammeter that is connected next to the 6.0 ω resistor would be 1.85 A.

To determine the reading on the ammeter that is connected in series with a 6.0 Ω resistor, we would need to know the voltage of the circuit and any other resistors that are in the circuit.

Assuming that the circuit consists only of a voltage source and a 6.0 Ω resistor in series with an ammeter, and that the voltage source has a constant voltage of V volts, then we can use Ohm's law to calculate the current flowing through the circuit:

I = V / R

where,

I = the current in amperes,

V = the voltage in volts,

R = the total resistance of the circuit in ohms.

In this case, the total resistance of the circuit is simply the sum of the resistance of the 6.0 Ω resistor and the resistance of the ammeter. Let's say that the resistance of the ammeter is Ra in ohms. Then the total resistance of the circuit would be:

Rtot = 6.0 Ω + Ra

The current flowing through the circuit would be:

I = V / Rtot

The reading on the ammeter would be the same as the current flowing through it. So to find the reading on the ammeter, we simply need to solve for I.

For example, if the voltage source has a voltage of 12 volts and the ammeter has a resistance of 0.5 ohms, then the total resistance of the circuit would be:

Rtot = 6.0 Ω + 0.5 Ω = 6.5 Ω

The current flowing through the circuit would be:

I = V / Rtot = 12 V / 6.5 Ω = 1.85 A

So the reading on the ammeter would be 1.85 A.

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Collapse, Condensation, Accretion lists are major steps of solar system formation in the correct order

The Sun and the planets formed together 4.6 billion years ago from a cloud of gas and dust known as the solar nebula. A shock wave from a neighboring supernova explosion most likely caused the solar nebula to collapse. The Sun formed in the center, and the planets formed in a thin disk around it.

Planets, including those in our solar system, are thought to form from dust the size of a human hair, according to scientists. They arise from the enormous ring of gas and dust that surrounds young stars. Gravity and other factors induce material within the disk to collide.

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A rightward shift in a demand curve and a rightward shift in a supply curve both influence the equilibrium quantity increases, but the equilibrium price may increase, decrease or remain unaffected, relying on the extent of shifts in the two curves.

A demand curve is a graph that indicates the relationship between the price of a good or service and the amount required within a specified time frame. Demand curves can be utilized to comprehend the price-quantity relationship for consumers in a respective market - grain or soybeans, for instance. On most supply curves, as the price of a good expands, the number of goods delivered also increases. Supply curves can frequently indicate if a commodity will encounter a price increase or decrease established on demand, and vice versa.

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The velocity that the plane must have in order to takeoff is found to be 230km/h in the blowing wind.

The takeoff velocity of the plane that is required is 250km/h and leave the runway.

The wind is blowing in the direction that is also the direction of the takeoff of the plane and the speed of the plane is 20km/h.

Now, if U is the takeoff speed of plane and V is the speed of the wind, then the speed of the plane that will be adequate to take off in the presence of the wind is given by,

Required speed = U-V

Here, V is subtracted from U because both are in same direction but they would  have been added if they were in opposite direction.

Required relative velocity = (250-20)km/h

Required relative velocity = 230km/h.

So, the velocity required of the plane for the tale off is 230km/h.

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If the partition coefficient K for an organic compound being extracted is 9 in favor of the organic phase over the aqueous the correct answer is E.0.1

The fraction of solute remaining in the aqueous phase after one extraction can be calculated using the following equation:

Fraction of solute in aqueous phase = 1 / (1 + K)

where K is the partition coefficient.

Substituting the given value of K = 9, we get:

Fraction of solute in aqueous phase = 1 / (1 + 9)

= 1 / 10

= 0.1

Therefore, the fraction of solute remaining in the aqueous phase after one extraction is 0.1, which is option E.

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If air resistance is not negligible, it will act as a resistive force against the motion of the jet plane.

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The mass M is 150 Kg

Weight is a measure of the force exerted on an object due to gravity, whereas mass is a measure of the amount of matter in an object. To convert mass to weight, you multiply the mass by the acceleration due to gravity. The formula for converting mass to weight is:

Weight = mass * acceleration due to gravity

The acceleration due to gravity is 10 m/s^2 on the surface of the Earth.

Mass = 1500 N/10 m/s^2

= 150 Kg

Thus the mass of the object can be obtained as 150 Kg

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To calculate the linear acceleration of an object in terms of its angular acceleration, you need to use the formula:

a = r * [tex]\alpha[/tex]

Linear acceleration is a measure of how quickly an object's velocity changes over time. It is defined as the rate of change of the object's velocity, and it is usually measured in units of meters per second squared (m/s^2). Linear acceleration can be caused by several different factors, including the application of a force, a change in the direction of motion, or a change in the speed of motion. For example, a car accelerating from a stop sign experiences linear acceleration as it increases its velocity over time.

Linear acceleration is an important concept in physics, engineering, and many other fields. It is used to describe the motion of objects and to calculate the forces that are acting on them. Linear acceleration can be positive (when an object is speeding up), negative (when an object is slowing down), or zero (when an object is moving at a constant speed).

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