three charges of magnitude 3.0x10^-4 C each located at x=1.0m, y=0.0m, at x=0.0m, y=0.0m, and at x=-1.0m, y=0.0m. the one in the middle is negative, while the other two are positive. what is the net coulombic force exerted by them on a negative 3.0x10^-5 C charge located at x=0.0m, y=2.0m? (the value of k is 9.0x10^9 N.m^2/C^2)

Answer:

About 410

Explanation:

Answer:

4 m/s

Explanation:

Divide 400 m by 100 s to get 4 m/s. It also equals about 8.95 mph, 8.94775 mph to be exact.

Electron shielding reduces the effective nuclear charge.

Electron shielding refers to the phenomenon where inner electron shells in an atom partially block the attractive force of the positively charged nucleus on the outer electrons. This shielding effect arises from the repulsion between negatively charged electrons. As a result, the outer electrons experience a reduced effective nuclear charge, which is the positive charge felt by an electron due to the nucleus.

The shielding effect can be explained by considering the electron distribution in an atom. Inner electrons occupy regions closer to the nucleus, creating a barrier that diminishes the electrostatic attraction between the outer electrons and the nucleus. This reduction in the effective nuclear charge affects various atomic properties, such as atomic size and ionization energy.

the concept of electron shielding and its impact on atomic properties, including atomic radius and ionization energy. Understanding electron shielding helps in explaining trends and behaviors observed in the periodic table.

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The power of the eye when viewing an object 33.0 cm away is 53 diopters.

The unit of measurement for an eye prescription is the diopter. Your contacts or glasses' focusing power is expressed in diopters. In other words, diopters represent the strength of your prescription. A stronger prescription will have greater numbers, whilst a softer prescription will have lesser numbers.

(1) Object distance \($=u=-33 \mathrm{~cm}$\).

Image distance \($=D$\) instance tow tens fretina

\($$\Rightarrow v=+2 \mathrm{~cm} \text {. }$$\)

Hence, focal length of the wens \($f$\) ' is given

\($$\text { by: } \begin{aligned}& \frac{1}{f}=\frac{1}{v}-\frac{1}{u}=\frac{1}{2}-\frac{1}{-33}=\frac{1}{2}+\frac{1}{33} \\\Rightarrow & \frac{1}{f}=\frac{33+2}{2 \times 33} \mathrm{~cm}^{-1} \\\Rightarrow & p=\frac{1}{f} \simeq 0.53 \mathrm{~cm}^{-1}=53 \mathrm{~m}^{-1} \\\Rightarrow & P=53 \text { diopters }\end{aligned}$$\)

(2) Focal lengths of the thin lenses are:

\($$f_1=24.7 \mathrm{~cm} \& f_2=-55.1 \mathrm{~cm} \text {. }$$\)

Hence, focal bength of the compound bens, 'f' is given by:

\($$\begin{aligned}\frac{1}{f} & =\frac{1}{f}+\frac{1}{f_2} \Rightarrow f=\frac{f_1 f_2}{f_1+f_2} \\& \Rightarrow f=\frac{24.7 \times(-55.1)}{24.7-55.1} \mathrm{~cm} \\& \Rightarrow f \simeq+44.77 \mathrm{~cm}\end{aligned}$$\)

Since, the focal length' \($f$\) ' is the, the compound lens is a converging owe.

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Answer: They Are all gas giants.

Explanation:

When a metal is illuminated by light, photoelectrons are observed provided the light's wavelength is less than 669 nm. The work function will be 0.030 * \(10^{-17}\) J

The work function (or work function) is defined as the minimum amount of thermodynamic work (i.e. energy) required to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.

When light of suitable frequency falls on a metal surface, electrons are emitted. These photo (light) generated electrons are called photoelectrons

h = 6.62 x \(10^{-34}\) J/Hz

c = 3 * \(10^{8}\) m/s

lambda = 669 * \(10^{-9}\) m

work function = h*c/lambda

                       = 6.62 x \(10^{-34}\)  * 3 * \(10^{8}\) /  669 * \(10^{-9}\)

                       = 0.030 * \(10^{-17}\) J

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Rarefactions are areas where the medium's particles have spread further apart.

A rarefaction is a localized decrease in the density of a medium caused by an increase in pressure or temperature. This decrease in density causes the particles of the medium to spread farther apart. This phenomenon is typically observed in sound waves but can also be seen in other forms of wave propagation, such as in light and water waves. As sound waves move through a medium, they cause the particles of the medium to compress, or come closer together. This creates a region of high pressure. As the wave continues to move, the pressure decreases, and the particles spread farther apart. This creates a rarefaction region. Rarefactions can also be caused by a decrease in temperature, which reduces the pressure of the medium, causing the particles to spread farther apart.

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The International System of Units (SI) is a globally accepted standard system to measure length, temperature, time, amount of substance, and mass. It provides a consistent framework for measuring fundamental physical quantities.

The SI system ensures uniformity and facilitates accurate and reliable communication of measurements across different disciplines and regions.

By establishing precise definitions and internationally agreed-upon units, such as the meter, Kelvin, second, mole, and kilogram, the SI system enables scientists, engineers, and researchers worldwide to conduct experiments, make accurate calculations, and exchange data with ease and precision.

Its widespread adoption promotes compatibility, comparability, and coherence in the field of measurement.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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Internal energy can be calculated by first law of thermodynamics as well as using specific heat.

From a microscopic perspective looking at a system at the atomic and molecular level, the internal energy U [J] of a system is the sum of the kinetic and potential energies of its atoms and molecules. Since the sum of kinetic and potential energies is mechanical energy, the internal energy of a system is the sum of atomic and molecular mechanical energies.

In other words, the internal energy is the total energy of the system associated with its microscopic constituents (made up of atoms and molecules) when viewed from a frame of reference that is stationary with respect to the body. Internal energy includes translational, rotational, and vibrational kinetic energies of molecules, potential energies within molecules, and potential energies between molecules.

In physics, the internal energy of a system is considered in terms of macroscopic properties that are very similar to atomic and molecular averages.

The internal energy change ΔU [J] is defined macroscopically as the difference between the absorbed energy Q [J] (as heat) and the emitted energy W [J] (as work).

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Answer: Seatbelts relate to Newton's first law of motion because in the case of a car accident, someone in the car would continue forward until they hit somethng else. A seat belt will help prevent this because it will push back on you (action-reaction force).

Explanation:

Answer:

Oxidation occurs at the anode and reduction occurs at the cathode

Explanation:

When a ferromagnetic material is placed in an electromagnetic coil and a magnetic field is applied, the magnetic induction (B) is increased.

Therefore, the correct answer is:

(a) There is a large increase in the magnetic induction (B)

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Answer:

Dead sea is full of salt.

Explanation:

The water of the Dead Sea is full of salt, which makes it much denser and heavier than freshwater. If you swim in it, you float very easily.

When salt is dissolved in water, for example sea water, dissolved salt adds to the mass of the water and makes the water denser than it would be without salt. Because objects float better on a dense surface, they float better on salt water than fresh water.

The role of the manager within the organization from classical and neoclassical approaches is as follows:Supervision by manager in classical schoolThe classical school of thought emphasized that organizations should be managed in a logical and scientific manner. The manager is the main decision-maker in this approach. Supervision is one of the main roles of a manager in this approach.

The manager ensures that the employees are following the set procedures and rules. They also ensure that the employees are working efficiently and effectively to achieve the set goals and objectives of the organization. The manager is responsible for creating a suitable work environment that enhances productivity.The human relations approach emphasizes the importance of the relationship between the manager and the employees. In this approach, the manager is seen as a mediator between the employees and the organization. The manager is expected to be understanding, supportive, and encouraging towards the employees. They are also responsible for providing the employees with a suitable work environment that is conducive to productivity. The manager's role in this approach is to promote employee morale and motivation by providing incentives and recognition for good performance.The Neoclassical approach is a modification of the classical approach. It focuses on the social and psychological factors that influence employees' behaviour in the workplace. The Neoclassical approach places more emphasis on the employees than the classical approach. The role of the manager in this approach is to ensure that the employees are motivated and satisfied with their work. The manager provides the employees with a supportive and encouraging work environment, where their needs and aspirations are met. The manager is also responsible for ensuring that the employees have the necessary resources to achieve their goals.

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Answer:

La Ley de atracción no pertenece a los tres principios de Newton.

Explanation:

Las leyes de Newton son tres principios que sirven para describir el movimiento de los cuerpos, basados en un sistema de referencias inerciales (es aquél que está en reposo o se mueve con velocidad constante, es decir, no tiene aceleración).

Las 3 leyes de Newton son:

Entonces, la Ley de atracción no pertenece a los tres principios de Newton.

The velocity of the larger fish after the meal is zero.

We can use the law of conservation of momentum, which states that the total momentum of a closed system remains constant. Before the light fish is swallowed, the total momentum is,

p1 = m1v1 + m2v2

where m1 = 4 kg, v1 = 1.5 m/s (velocity of the heavy fish), m2 = 1.2 kg, and v2 = -3.0 m/s (negative because the light fish is swimming toward the heavy fish).

p1 = (4 kg)(1.5 m/s) + (1.2 kg)(-3.0 m/s)

p1 = 0 kg m/s

After the light fish is swallowed, the two fish become one system. Let the velocity of the larger fish after the meal be v.

The total momentum of the system after the meal is,

p2 = (m1 + m2)v

By the law of conservation of momentum, p1 = p2,

0 kg m/s = (4 kg + 1.2 kg) v

Solving for v,

v = 0 m/s

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Answer:

The distance traveled is 24 meters but the change in position is 0 meters because the person comes back to the same point.

Explanation:

To be straight it is 24 meters.

2.15 s time  it take the can to hit the floor when a can of bean rolls off a horizontal table with a velocity of 0.44 m/s

velocity=distance/time

time=distance/velocity

time=0.95/0.44

time=2.15 s

A vector number called velocity can be used to express "the speed at which an object changes its location." Imagine someone moving quickly while taking two steps forward and two steps back, all while remaining in the same place. A vector quantity is velocity. As a result, velocity is aware of direction. When calculating an object's velocity, the direction must be taken into consideration. A speed of 55 miles per hour is insufficient detail. The velocity of the item must be properly described in terms of the direction. Simply explained, the velocity vector's direction shows how an item is moving.

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(A) It will 100 times larger than the original force.

As the square of the distance between the two charges increases, the force's strength decreases. Because of this, if the gap between the two charges is doubled, the attraction or repulsion between them weakens and drops to one-fourth of its initial strength. Thus, option A is correct.

As their separation rises, so does the force of attraction or repulsion between two objects.  Additionally, when the spacing between things gets smaller, the force of attraction or repulsion between the objects gets stronger. Distance affects electrical forces significantly.

Gravitational forces will be reduced as separation distance increases because they are inversely proportional to the square of the distance between the two interacting objects. When two things are moved apart, their gravitational attraction to one another also lessens.

Therefore, The new force will be 100 times more than the original.

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Answer:

None of the statements are correct.

Explanation:

There is no mention of potential energy in the given information, so it is not correct to say that there are 1,900 joules of potential energy in this system.

It is not correct to say that 900 joules of energy are destroyed in this system. Energy cannot be destroyed, it can only be converted from one form to another or transferred from one place to another.

It is not correct to say that 2,500 joules of work are being done by this model engine. Work is defined as the product of force and displacement, and the given information does not include any information about force or displacement.

It is not correct to say that 1,000 joules of energy leave the system. The given information only states that the thermal energy of the engine increases by 900 joules, but does not specify whether any other forms of energy leave the system.

It is correct to say that 1,500 joules of kinetic energy are produced by this model engine for every 3,400 joules of chemical energy taken in. However, it is not correct to say that this energy can be used to move an object without any further information about the object or the conditions under which the energy would be used.

To calculate the electric force on q1, we need to know the magnitude and direction of the electric field at the location of q1, as well as the charge of q1.

Since you haven't provided any specific values or a diagram illustrating the situation, I'm unable to give you a numerical answer. However, I can explain the general process and provide an example.

The electric force (F) experienced by a charged particle in an electric field (E) is given by the equation:

F = q * E

where q is the charge of the particle and E is the electric field vector. The direction of the force is determined by the direction of the electric field vector.

Let's consider an example to illustrate the process:

Suppose q1 is a positive charge (+q) and the electric field at its location points to the right (→). In this case, the force on q1 will also point to the right (→) because the force on a positive charge is in the direction of the electric field.

On the other hand, if q1 were a negative charge (-q) and the electric field at its location points to the right (→), the force on q1 would point in the opposite direction, to the left (←). This is because the force on a negative charge is opposite to the direction of the electric field.

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Convection currents play an essential role in heat transfer within fluids such as water. Therefore Yes, convection currents can be set up in water when it is heated at the top.

Yes, convection currents can be set up in water when it is heated at the top.

When water is heated from the top, the molecules near the heat source gain energy and become less dense. As a result, these warm water molecules rise to the surface. As the warm water rises, it creates a region of lower density at the top. This creates a pressure difference between the bottom (cooler) and the top (warmer) regions of the water.

As a consequence of the pressure difference, the cooler and denser water from the bottom moves upwards to replace the rising warm water. This downward flow of cooler water and the upward flow of warmer water establish a circular motion known as a convection current.

Convection currents play an essential role in heat transfer within fluids such as water. They help distribute heat throughout the fluid by carrying the energy from the heat source (in this case, the top) to other parts of the fluid.

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Primary groups: high degrees of dedication, togetherness, and intimacy. Typically huge, impersonal, and frequently including secondary groups

A secondary group is one based on shared goals or interests in which the members are infrequently, if ever, in face-to-face contact with each other, such as a club. A primary group is a small group based primarily on long-term face-to-face interaction and typically based on affiliation, such as a family or a friendship group. Primary groups, in Cooley's opinion, are the most important in our life. The main group is typically quite small and consists of people who interact face-to-face in emotional ways over an extended period of time. This group fulfils expressive rather than pragmatic requirements—emotional demands. A main group consists

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Ans the answer is 0.25J

Explanation

i guess

Answer:

if the pipe is too small the noise is too high...if the pipe is too big the noise is too low

Answer:

Explanation:

Let v be the velocity of object ,

Given that mass of object , m=100 g=  

1000

100

​

kg=0.1 kg

& kinetic energy of object =20 J

K.E  =  

2

1

​

 mv  

2

20=  

2

1

​

×0.1v  

2

⟹v  

2

=400

⟹v=20 m/s

Answer:

1 kg at 1 m/s

Explanation:

less weight to propell it forward