Consider a pair of charged particles, particles 1 and 2, separated by a distance r. 6) Which options below are true? [Enter your answer as a string of the letter options you believe are correct. For instance, if you think options A, D, and E are correct, then enter "ADE"] A) Particle 2's electric field contributes to the electric force on particle 1. B) Particle 1's electric field does not contribute to the electric force on particle 1. C) If particle 2 were removed, there would still be a non-zero electric field at its location. D) If particle 2's distance from particle 1 is tripled, particle 1's electric field at 2's new location is no different than before since the field does not depend on the the properties of particle 2. E) None of the above

The relative density of the metal that is on a spiral spring which extends 9.4 cm in air and 3.5 cm in water is 1.59

RD = Weight of body in air / Upthrust

RD = Relative density

F = - k x

F = Spring force

k = Spring constant

x = Displacement

RD = - k ( 9.4 ) / - k ( 9.4 - 3.5 )

RD = 9.4 / 5.9

RD = 1.59

Relative density is the ratio of density of the substance to the density of the reference material. Density is the ratio of mass to volume. The unit of density is kg / m³. Relative density has no unit since it is density divided by density.

Therefore, the relative density of the metal​ is 1.59

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Answer:

A. 4d

Explanation:

Magnetic field strength is inversely proportional to distance. So in order to have a smaller magnetic field, we need to move further out from the wire. How far we go exactly can be determined from the formula: B=(μ₀I)/(2πr)

(That is derived from Ampere's Law, which states ∫B•dl=μ₀I)

With that you can set up a ratio between the magnetic fields in both cases. Because the current is the same for both instances, everything reduces out on one side of the equation and leaves you with something that relates the two distances by a ratio of each magnetic field value.

My work is in the attachment, comment for questions.

Answer:

hi

Explanation:

false because the light of some stars can be very bright, but it can also be very far from the earth.

have a nice day

mvh=1. 654106. 6210=41014m is the de Broglie wavelength of a proton whose kinetic energy is equal to that of the proton.

An electron has an energy of 100,000 eV (100 keV) at a potential difference of 100,000 V (100 kV), and so on. The energy gained by an ion with a double positive charge when it is accelerated through 100 V is 200 eV.

De Broglie wavelength is the length of a particle with kinetic energy E. The wavelength changes to /2 when energy E is added to it.

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Positive charge is on carbon in the first structure while positive charge is on nitrogen in the second. For a complete view of the resonance structure that moving electrons have produced, see the attached image.

Lewis structures can appear in multiple forms in some molecules. The actual molecule is a combination of all of these structures, which are collectively referred to as resonance structures. Resonance structures contribute more to the actual molecule the more stable they are.

In the accompanying figure, positive is more stable on carbon because it has a lower electronegative charge than nitrogen. However, after sharing, carbon only has 6 electrons left in its valence shell in the first structure, whereas it has 8 in the second structure, making its octet fully formed.

Each structure of nitrogen contains 8 electrons. Resonance structure II is more stable because octet completion is the dominant factor.

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Answer:

lol I don't know think u could help me with my mathematics

Answer: 1. The movie one is virtual and the bathroom mirror is real

2. The image is distorted in a way

3. Behind the spoon

Explanation:

The movie one is virtual and the bathroom mirror is real and The image is distorted in a way and Behind the spoon.

In virtual desktops, the desktop environment is segregated from the physical device being used to access it. They are preloaded images of operating systems and apps. Over a network, users can remotely view their virtual desktops.

A virtual desktop can be accessed from any endpoint device, including a laptop, smartphone, or tablet. The user interacts with the client software that was installed on the endpoint device by the virtual desktop provider.

A virtual desktop mimics the appearance and feel of a real workstation. Because robust resources, like storage and back-end databases, are easily accessible, the user experience is frequently even better than that of a physical workstation.

Therefore, The movie one is virtual and the bathroom mirror is real and The image is distorted in a way and Behind the spoon.

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Answer:

D. zero

Explanation:

For momentum of an isolated or closed system to be conserved (initial momentum must equal final momentum), the net external force acting on the system must be zero.

There is always external forces acting on a system, for this system’s momentum to remain constant, all the external forces acting on the system must cancel out, so that the net external force on the system is zero.

\(F_{ext} = 0\)

Therefore, the correct option is "D"

D. zero

Answer:

proportional tax is.the answer.

Explanation:

because both girls tax is equal.

Answer:

It is a basic postulate of the theory of relativity that the speed of light is constant. This can be broken down into two parts: The speed of light is independent of the motion of the observer. The speed of light does not vary with time or place.

Explanation:

The vectors addition permits locating the perfect result for the sum of the two vectors in option B).  See attached and the vector is directed to the right and up.

Vector addition is the operation of adding or extra vectors together into a vector sum. The so-known as parallelogram regulation gives the rule for vector addition of or greater vectors. for two vectors and, the vector sum is received via placing them head to tail and drawing the vector from the loose tail to the unfastened head.

A vector is an amount or phenomenon that has impartial residences: importance and direction. The time period also denotes the mathematical or geometrical representation of the sort of quantity. Examples of vectors in nature are velocity, momentum, force, electromagnetic fields, and weight.

Vectors are used in technological know-how to describe something that has a direction and a magnitude. they're commonly drawn as pointed arrows, the length of which represents the vector's importance

Disclaimer: your question is incomplete, please see below for the complete question.

The image shows the complete question.

Which vector is the sum of vectors à and b?

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The exponential form is y = 1264 (1/8)ˣ.

Number of copies sold in first month = 1264

Factor by which the number of copies sold to be increased = 1/8

The exponential form can be written as,

y = abˣ

where a is the number of copies sold in first month, b is the factor by which the selling rate increased, x is the number of months and y is the total copies sold at the end of x months.

Therefore,

y = 1264 (1/8)ˣ

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Answer:

The velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

Explanation:

Given;

mass of the bullet, m₁ = 2.47 g = 0.00247 kg

mass of the wooden block, m₂ = 2.43 kg

initial velocity of the wooden block, u₂ = 0

height reached by the bullet-block system after collision = 0.295 cm = 0.00295 m

let the initial velocity of the bullet on leaving the gun's barrel = v₁

let final velocity of the bullet-wooden block system after collision = v₂

Apply the principle of conservation of linear momentum;

Total initial momentum = Total final momentum

m₁v₁ + m₂u₂ = v₂(m₁ + m₂)

0.00247v₁  + 2.43 x 0  =  v₂(2.43 + 0.00247)

0.00247v₁ = 2.4325v₂ -------(1)

The kinetic energy of the bullet-block system after collision;

K.E = ¹/₂(m₁ + m₂)v₂²

K.E = ¹/₂ (2.4325)v₂²

The potential energy of the bullet-block system after collision;

P.E = mgh

P.E = (2.4325)(9.8)(0.00295)

P.E = 0.07032

Apply the principle of conservation of mechanical energy;

K.E = P.E

¹/₂ (2.4325)v₂² = 0.07032

1.21625 v₂²  = 0.07032

v₂²  = 0.07032  / 1.21625

v₂² = 0.0578

v₂ = √0.0578

v₂ = 0.24 m/s

Substitute v₂ in equation (1), to obtain the initial velocity of the bullet;

0.00247v₁ = 2.4325v₂

0.00247v₁ = 2.4325 (0.24)

0.00247v₁ = 0.5838

v₁ = 0.5838 / 0.00247

v₁ = 236.36 m/s

Therefore, the velocity of the bullet on leaving the gun's barrel is 236.36 m/s.

The power needed to boil the water is divided by the element's power output, and the result is multiplied by 100 to get the efficiency of the kettle as a percentage. The answer is 79 %.

We are informed that

Electric kettle power is 1 kW.

Electric kettle voltage is 230 V.

The time it takes the kettle to bring the water to boiling point is 7.5 minutes.

1 kg = mass of water.

Heat generated equals V x I x t + Pt.

generated heat = 1000 W x 7.5 x 60

Heat absorbed equals (100 - 15) x 1 x 4200 = 4200 x 85

Efficiency is determined by multiplying the heat produced by the heat absorbed by 100.

= 4.2 x 85 x 10^3 / 4.5 x 10^5 x 100

= 357 / 4.5 = 79 %

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Answer:

\(\frac{T_2}{T_1} = 1\)

Explanation:

The root mean square velocity of the gas at an equilibrium temperature is given by the following formula:

\(v = \sqrt{\frac{3RT}{M} }\)

where,

v = root mean square velocity of molecules:

R = Universal Gas Constant

T = Equilibrium Temperature

M = Molecular Mass of the Gas

Therefore,

For T = T₁ :

\(v = \sqrt{\frac{3RT_1}{M} }\)

For T = T₂ :

\(v = \sqrt{\frac{3RT_2}{M} }\)

Since both speeds are given to be equal. Therefore, comparing both equations, we get:

\(\sqrt{\frac{3RT_1}{M} }=\sqrt{\frac{3RT_2}{M} }\\\\\frac{T_2}{T_1} = 1\)

Answer:

Explanation:

In order to use a device rated for use in 240 volt for use in 120 V , we have to use a step down transformer . In step down transformer no of turn in secondary coil is less than that in primary coil .

For transformer the relation is as follows

V₂ / V₁  = N₂ / N₁ = turn ratio

Where V₂ and V₁ are volts in secondary and primary coil and N₂ and N₁ is no of turns in secondary and primary coil.

Here V₂ = 120V , V₁ = 240 V

turn ratio = N₂ / N₁ = V₂ / V₁  = 120 / 240 = .5

turn ratio = .5 .

(a) Normalization factor for wavefunction 1 is, \(A = \sqrt{\dfrac{3^3}{{(16\pi a^5)}}\), for wavefunction 2 is, \(B = \sqrt{\dfrac{15}{16\pi a^5}}\). The two wavefunctions are mutually orthogonal. (b) The expectation value of r for \(\psi_1\) is 32.

(a) To normalize the wavefunctions, we need to find the normalization constants A and B such that

\(\int \|{\psi_1}\|^2 dV = 1\) and \(\int \|{\psi_2}\|^2 dV = 1\)

where \(\psi_1\) and \(\psi_2\) are the two wavefunctions given.

(i) \(\psi_1 = (2 - \dfrac{r}{a}) \times e^{\dfrac{-r}{2a}}\)

The normalization condition for psi1 is:

\(\int \|\psi_1\|^2 dV = \int \{2 - \dfrac{r}{a} \times e^{\dfrac{-r}{a}}\}^2 r^2 sin\theta dr d\theta d\phi\\\\ = 1\)

Evaluating the integral using spherical coordinates, we get:

\(\int_0^\infty \int_0^\pi \int_0^{2\pi} [(2 - r/a)^2 e^{-r/a} r^2 sin\theta]\ dr\ d\theta\ d\phi = 1\\\\\dfrac{(16\pi a^5)}{(3^3)} \times \|A\|^2 = 1\\A = \dfrac{3^3}{{(16\pi a^5)}^{0.5}}\)

(ii) \(\psi_2 = r sin\theta\ cos\phi\ e^{\dfrac{-r}{2a}}\)

Evaluating the integral using spherical coordinates, we get:

\(\int_0^\infty \int_0^\pi \int_0^{2\pi} r^4 sin^3\theta cos^2\phi e^{-r/a} dr\ d\theta\ d\phi = 1\\\\\dfrac{16\pi a^5}{15} \times \|B\|^2 = 1\\B = \sqrt{\dfrac{15}{16\pi a^5}}\)

To confirm that the two wavefunctions are mutually orthogonal, we need to evaluate the integral \(\int \psi_1\times \psi_2 dV\) and show that it is equal to zero. Using spherical coordinates, we get:

\(\int_0^\infty \int_0^\pi \int_0^{2\pi} [(2 - r/a) \times e^{-r/a} \times r sin\theta cos\phi \times e^{-r/2a}]\ r^2\ sin\theta\ dr\ d\theta\ d\phi\\\\= 8\pi a^5 \times [\int_0^\infty e^{-r/a} r^2 (2 - r/a) e^{-r/2a}\ dr] \times [\int_0^\pi sin\theta\ cos\theta\ d\theta] \times [\int_0^{2\pi} cos\phi\ d\phi]\\= 0\)

Therefore, the two wavefunctions are mutually orthogonal.

(b) To evaluate the expectation values of r and r^2, we need to calculate the integrals \(\int psi_1 \times r\ \psi_1 dV\) and \(\int \psi_1 \times r^2\ \psi_1 dV\). Using spherical coordinates, we get:

For psi1:

\(\int psi_1 \times r\ \psi_1 dV = 4\pi \int_0^\infty (2 - r/a)^2 e^{-r/a} r^4 dr\\\\ = \dfrac{32\pi a^5}{15}\)

\(\int \psi_1 \times r^2\ \psi_1 dV = 4\pi \int (2 - r/a)^2 e^{-r/a} r^5 dr\\\\ = \dfrac{128\pi a^6}{45}\)

Therefore, the expectation value of r for \(\psi_1\) is 32.

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The material that the magnet attracts is Iron and hence the ideal solution is option D.

The magnet is the material that produces the magnetic field on its own. The magnetic field is the invisible field but it has the ability to attract other materials. Magnets are made up of ferromagnetic materials.

Ferromagnetic materials are materials that are permanently magnetized due to the unpaired electrons in the materials. Most of the Ferromagnetic materials are metals namely nickel, iron, etc.

When the magnet is brought close to the iron, the electrons in the iron are aligned in the direction of the magnetic field which makes the iron become magnetized. Thus, the attraction takes place between two magnetized objects.

Thus, the ideal solution is option D) Iron.

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Answer:

At on average the speed limit may be -25.

Explanation:

At on average speed limit.

Answer:

In a collision, there is a collision force which endures for some amount of time to cause an impulse. This impulse acts upon the object to change its velocity and thus its momentum

The average speed of the plane is 750 miles/hour.

Initial distance covered by the plane, d₁ = 5000 miles

Second distance covered by the plane, d₂ = 10000 miles

Time taken by the plane to cover distance, t = 20 hours

The average speed of an object is defined as the total distance covered by the object in a given time.

So,

The total distance covered by the plane,

d = d₁ + d₂

d = 500 + 10000

d = 15000 miles

The expression for the average speed of the plane is given by,

v = (d₁ + d₂)/t = d/t

v = 15000/20

v = 750 miles/hour

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Explanation:

Potential energy is a scalar quantity because it has only magnitude and no direction. Its ability to be negative does not affect its scalar nature.

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The area of one page of a book is 500 \(cm^{2}\) or \(5 m^{2}\).

Area is the amount of space occupied by a two-dimensional figure. It is the quantity that measures the number of unit squares that cover the surface of a closed figure.

The formula for Area = length x breadth

From the question;

length = 20cm

breadth = 25cm

Area = 20 x 25

Area = 500 \(cm^{2}\)

Converting the value in \(cm^{2}\) to meters

Area = 500/100

Area =  \(5 m^{2}\)

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So, the final velocity of the ball when it is 2.101 above the ground is 13.99 m/s or can be rounded to 14 m/s.

Hi ! In this question, I will help you. This question will addopt the principle of final velocity in free fall. Free fall is vertical downward movement that occurs when any object dropped without initial velocity. In othee word, the object that falls is only affected by the presence of gravity and its initial high. In general, the final velocity in free fall can be expressed by this equation :

\( \boxed{\sf{\bold{v = \sqrt{2 \times g \times h}}}} \)

With the following condition :

We know that :

Note :

At this point (2.101 m above the ground), the object can still complete its movement up to exactly 0 m above the ground.

What was asked :

Step by Step

\( \sf{v = \sqrt{2 \times g \times \Delta h}} \)

\( \sf{v = \sqrt{2 \times g \times (h_1 - h_2)}} \)

\( \sf{v = \sqrt{2 \times 9.8 \times (12.09 - 2.101)}} \)

\( \sf{v = \sqrt{19.6 \times 9,989}} \)

\( \sf{v \approx \sqrt{195.78}} \)

\( \boxed{\sf{v = 13.99 \: m/s \approx 14 \: m/s}} \)

So, the final velocity of the ball when it is 2.101 above the ground is 13.99 m/s or can be rounded to 14 m/s.

Answer:

pictures please

Explanation:

I need a picture so I can tell you

Answer: (A)The net force was not 0 on the skater during her motion.

Explanation:

The net force was not 0 on the skater during her motion. The roller skated slowed down, which indicates that there is another force acting on her roller skates.

The correct statement is "The net force was 0, which is why the skater moved in a straight line." The correct answer is B.

Newton's First Law of Motion, states that an object at rest or in motion will remain at rest or in motion with a constant velocity in a straight line unless acted upon by an external force. In this case, the skater is traveling at a constant velocity, which means that the net force acting on her must be zero.

Option A is incorrect because if the net force was not zero, then the skater would not have moved in a straight line. She would have accelerated or changed direction, as per Newton's Second Law of Motion.

Option C is also incorrect because the skater's inertia does not have any effect on the forces acting on her. Inertia is a property of matter that resists changes in motion, but it does not cause any forces to be unbalanced.

Option D is incorrect because the action-reaction pair of forces cancel each other out and do not affect the skater's motion. The action-reaction pair only affects the interaction between two objects, but it does not affect the motion of a single object.

Therefore, The correct option is B i.e. The net force was 0, which is why the skater moved in a straight line.

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Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.

Frequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).

Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.

Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.

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Answer:

I’m pretty sure it’s B. It is harmful to the person and beneficial to the bacteria.

Explanation:

I’m taking the test right now. But if you think about it the bacteria is fighting off the medicine to which means the bacteria will just keep growing. So I’m 97% sure it’s B. Good luck you can do it don’t stop believing in yourself!!!!!! Hope I helped. And remember at the end of the day all that matters is love and happiness not grades!!!!!!!

Answer:

Answer is B!

Explanation:

I took the cumulative exam and got 100%