Two charges, 3.3 nC and 1.6 nC are separated by 31 cm. An electron is placed at their midpoint initially at rest. How fast is the electron moving in m/s when it is 10 cm from the 3.3 nC charge

Answer:

The change in velocity is 5.5 km/h

Explanation:

The initial velocity with which the sailboat is travelling, v₁ = 10 km/h

The final velocity with which the sailboat is travelling, v₂ = 15.5 km/h

The change in velocity, Δv, is the difference between final velocity, v₂ and the initial velocity, v₁, as follows;

Mathematically, Δv = v₂ - v₁

By substituting the given values, we have;

Δv = 15.5 km/h - 10 km/h = 5.5 km/h

The change in velocity, of the sailboat Δv = 5.5 km/h.

Answer:

7 1/2m/s/s

Explanation:

37-22=15

15/2=7 1/2

Speed varies with Distance travelled w.r.t time

\(\boxed{\sf Speed=\dfrac{Distance}{Time}}\)

Whereas velocity varies with displacement w.r.t time.

\(\boxed{\sf Velocity=\dfrac{Displacement}{Time}}\)

Answer:

a and c

Explanation:

didn't actually do the math, but i am pretty positive that those are equal

The  energy of photon in kJ/mol is 329kJ/mol.

Wavelength of radiation is 370nm. The frequency of given wavelength is

            ν = c / λ

            ν = 3×10^8 / 370×10^-9

            ν = 8.11 × 10^14 s^-1

      Now the energy of photon is:

             E = hν

             E = 6.63×10^-34  J.s/photon × 8.11×10^14s^-1

             E = 5.41× 10^-19  J/photon

         To find in mole

              E = 5.41× 10^-19 × 6.022×10^23

               E = 3.29 ×10^ 5 J/mol

   So, the energy of mole of photon is equal to 329 kJ/mol.

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Graph A does.

The work you do to carry the ball up to the top of the cliff is the total energy it has.

Before you drop it, all that energy is potential energy.  

Once you drop it, the potential energy starts to turn into kinetic energy as it falls.  

When it hits the ground, its kinetic energy is exactly the amount of potential energy it had at the top, and it has no more potential energy.

The total (potential + kinetic) energy is the same amount all the way down. Energy isn't created or destroyed.

The graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.

For a body that is falling from a height, the potential energy of the body is being converted to kinetic energy. We must note that the total mechanical energy of the body is constant.

As such, the graph that shows the ball's total energy and the elapsed time as the ball falls to the ground is graph A.

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Answer:3.5 seconds

Explanation:

Explanation:

Coal is a fossil fuel and is the altered remains of prehistoric vegetation. The energy we get from coal today comes from the energy that plants absorbed from the sun millions of years ago. In the burning process of coal, carbon dioxide (CO2) is emitted. Humans expel CO2, and plants utilize it every single day. Carbon is a building block for all forms of life and is used in a lot of everyday products.

Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands—called coal forests—that covered much of the Earth's tropical land areas during the late Carboniferous (Pennsylvanian) and Permian times. However, many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras.

Answer:

look it up of goog le

Explanation:

F = ma

= 10kg × 2m/s

= 20N

Answer : 20N

Explanation :

F = Force (N)

m = mass (kg)

a = acceleration (m/s)

The electric field vector of the reflected wave at the reflecting surface is the negative of that of the incident wave. This is due to boundary conditions at the conducting surface.

a) When an electromagnetic wave is reflected at normal incidence on a perfectly conducting surface, the electric field vector of the reflected wave at the reflecting surface is the negative of that of the incident wave. This behavior is due to the boundary conditions at the conducting surface.

A perfectly conducting surface has free charges that can move easily. When an electromagnetic wave interacts with the conducting surface, the electric field component of the wave exerts a force on the free charges, causing them to redistribute themselves.

To maintain the boundary condition of zero electric field at the conducting surface, the reflected wave is generated with an electric field vector that is equal in magnitude but opposite in direction to that of the incident wave. This results in the electric field vector of the reflected wave at the reflecting surface being the negative of that of the incident wave.

b) The superposition of the incident and reflected waves results in a standing wave when reflected at normal incidence on a perfectly conducting surface. A standing wave is formed when two waves of the same frequency and amplitude traveling in opposite directions interfere with each other.

In this case, the incident wave and the reflected wave have the same frequency and amplitude but travel in opposite directions. As they overlap, their waveforms add up or cancel out at different points along the reflecting surface, resulting in regions of constructive and destructive interference.

The constructive interference regions correspond to points where the incident and reflected waves are in phase and have a maximum amplitude. The destructive interference regions correspond to points where the waves are out of phase and cancel each other, resulting in zero amplitude.

This pattern of constructive and destructive interference creates stationary points, called nodes and antinodes, along the reflecting surface. These nodes and antinodes represent the positions of minimum and maximum amplitude of the standing wave.

c) The relationship between the magnetic field vector of the incident and reflected waves at the reflecting surface follows the same principle as that of the electric field vector. Since electromagnetic waves consist of mutually perpendicular electric and magnetic field vectors, the magnetic field vector of the reflected wave at the reflecting surface will also be the negative of that of the incident wave.

Therefore, at the reflecting surface of a perfectly conducting surface, both the electric and magnetic field vectors of the reflected wave will have opposite directions but the same magnitude as those of the incident wave.

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Answer:

at 10 seconds.. b/c that's when the velocity stops increasing..

Explanation:

Answer:

Mid ocean ridges are evidence of sea floor spreading as tectonic movement opens a gash or "fault" in the ocean floor.

Answer:

Eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves; this evidence led scientists to look again at Wegener's hypothesis of continental drift.

The smooth and accurate execution of movement as conceived in the mind and executed by the body parts describes ; The central nervous system.

Although your question is incomplete an answer is provided which falls within the scope of your question

The human brain receives, interprets and transfer signals it deduces from the impulses it received to the various sense organs ( body parts ) for execution. and this process involves coordination within the nervous system.

The central nervous system is a category of the Nervous system of a human and it consists of the spinal cord and the human brain. and the peripheral nervous system

Hence we can conclude the smooth and accurate execution of movement as conceived in the mind and executed by the body parts describes, The central nervous system.

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Answer:

0.0217 m

Explanation:

Ftom the question,

Applying Coulomb's law

F = kqq'/r²............... Equation 1

Where F = Electric Force, q and q' = First and second charge respectively, r = distance between the charges, k = coulomb's constant.

make r the subeject of the equation

r = √[(kqq')/F]............. Equation 2

Given: q = +3.6×10⁻⁸ C, q' = -3.2×10⁻⁸ C, F = -2.2×10⁻² N

Constant: k = 8.98×10⁹ Nm²/C²

Substitute these values into equation

r = √(+3.6×10⁻⁸×-3.2×10⁻⁸×8.98×10⁹/-2.2×10⁻²)

r = √(-103.4489×10⁻⁷/-2.2×10⁻²)

r = √(47.02×10⁻⁵)

r = 21.68×10⁻³

r ≈ 21.7×10⁻³ m.

r ≈ 0.0217 m

Hence the seperation between the two balloons is 0.0217 m

Answer:

Since the waves must carry a great deal of visual as well as audio information, each channel requires a larger range of frequencies than simple radio transmission. TV channels utilize frequencies in the range of 54 to 88 MHz and 174 to 222 MHz. (The entire FM radio band lies between channels 88 MHz and 174 MHz.)

Answer:

Since the waves must carry a great deal of visual as well as audio information, each channel requires a larger range of frequencies than simple radio transmission. TV channels utilize frequencies in the range of 54 to 88 MHz and 174 to 222 MHz. (The entire FM radio band lies between channels 88 MHz and 174 MHz.)

Explanation:

Ok

Answer:HJKGFHJYKIUGFJDTGYKUGFJDSX

Explanation:65TTY6Y Y YY. ;D DDS

HVC BJCHGNMGHJFYIKUHYGFTR6457TY8IUOHJKGYTDYR567YUOI8HJKBGJMVHDTR5E46T7Y TFGDGHYUFVYH T7UYGHUGFTY Y6TURF67URY

Answer:

Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium.

Explanation:

Answer:

Your answer is graphite :) Have a nice day

Explanation:

False. An oscilloscope is an essential tool in electronics and can indeed measure and display the peak-to-peak values of an AC waveform. Peak-to-peak value refers to the difference between the highest (positive) peak and the lowest (negative) peak of an AC waveform. This value is important because it represents the maximum voltage swing of the waveform.

When connected to a circuit, the oscilloscope displays the AC waveform as a graph of voltage versus time. By observing this graph, you can easily identify the positive and negative peaks of the waveform. Most modern oscilloscopes come with built-in measurement tools that can automatically calculate and display the peak-to-peak value, making the process even more convenient.

In summary, an oscilloscope can measure and display the peak-to-peak values of an AC waveform, which is essential for understanding the characteristics of the waveform and analyzing the performance of electronic circuits.

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In the dry and extremely hot conditions of Southern California during summer, at approximately 1 pm, one would expect to see that the stomata of plants are closed. This is because to avoid excessive water loss through transpiration, plants tend to close their stomata, which are tiny openings on the surface of leaves responsible for gas exchange. Closing the stomata helps to conserve water by reducing the loss of water vapor from the plant's leaves.

Stomata play a crucial role in gas exchange during photosynthesis. However, when plants are exposed to hot and dry conditions, the closure of stomata becomes essential to prevent excessive water loss. By closing their stomata, plants can reduce transpiration and conserve water. Transpiration is the process through which water vapor escapes from the plant through the stomata.

Closing the stomata helps in minimizing water loss by reducing the evaporation of water from the plant's leaves into the surrounding dry air. This is particularly important in drought conditions when water availability is limited. By conserving water, plants can better withstand the dry and hot environment.

While the closure of stomata helps in water conservation, it also has an impact on photosynthesis. When the stomata are closed, the exchange of gases, including carbon dioxide (CO2) for photosynthesis, is restricted. As a result, the rate of photosynthesis decreases. However, in extremely hot and dry conditions, the priority for the plant is to conserve water rather than carry out photosynthesis. Therefore, it is expected that the stomata will be closed to limit water loss, even though this reduces the availability of CO2 for photosynthesis.

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The working with electric charges, the symbol used in an equation to represent the electric field of an object is E. Thus, the correct option is B.

An electric field is defined as the physical field that surrounds the charges or electrically charged particles. The electric field is exerted the force on all the other charged particles and the force is either an attractive or repulsive force.

The electric field around the charges is denoted by the lines called electric field lines. The field lines are radially outwards if the charge is positive and the field lines are radially inwards if the charge is negative. For two charges, the field lines are starts from the positive charge and end with the negative charge.

The electric field equals force per unit test charge. The force is Coulomb's law between two charges. The electric field is also obtained as electric potential per unit displacement.

The electric field is denoted by the letter, E. E = F / q or -V/r, the negative sign indicates that the electric field moves opposite to the potential gradient. The unit of the electric field is Newton per coulomb or volt per meter.

Thus, the correct option is option B.

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The type of switch that connects all devices in a rack to the rest of the network is called a "Top of Rack (ToR) switch".

Top of Rack (ToR) switch is a type of network switch that is typically installed in a data center or server room at the top of a server rack. The main purpose of a ToR switch is to provide high-bandwidth connectivity to the servers or other network devices within the rack and to connect them to the rest of the network.

ToR switches are commonly used in large-scale computing environments, such as cloud data centers, web hosting facilities and enterprise server rooms where they help to improve network efficiency and simplify network management.

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The static friction coefficient must be at least 0.528 for this to occur , parallel to the slope

The force od friction on such an object which is not moving is called static friction. Static friction, which is equivalent to and in the opposite direction of your push, is holding a stationary block in place if you push on it and it doesn't move.

The maximum , limiting level of friction force surfaces is given by the formula FMAX=R FMAX = R, where is the frictional coefficient and R is really the normal reaction of the two surfaces. The frictional coefficient serves as a gauge for surface roughness; the higher the value, the rougher the surface.

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Answer:

Solution s =ut + ½ at 2 = 0×10 + ½ × 10×10 2 = 1000/2=500 m

Explanation:

The body is accelerating from stationary to a velocity of 100 m/s within 10 seconds. Thus, the distance covered is 500 m.

Acceleration of a moving body is the rate of change in its velocity. Acceleration is a vector quantity having both magnitude and direction. The change in magnitude or direction or both in velocity causes an acceleration in the moving body.

The relation between distance with the velocity, acceleration and time is given as :

s = ut + 1/2 at²

The initial velocity u = 0 here

v = 100 m/s

t = 10 seconds.

acceleration =  100 /10 = 10 m/s²

Then the distance covered is calculated as follows:

s = 1/2 at²

  = 1/2 10 m/s²× 10²

  = 500 m

Therefore, the distance covered by the body is 500 m.

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Answer:

A

Explanation:

Light has both wave and particle characteristics. It behaves as wave in examples such as Reflection, refraction, diffraction, interference. It behaves as a particle in photoelectric effect, compton's effect etc. Light is an example of wave-particle duality.

Light demonstrate both particle and wave characteristics. It can be understood by photo electric effect .

Light behaves like a particle in some phenomenon , for example photoelectric effect and like wave in some phenomenon , for example reflection and refraction , in this wave light has dual nature.

Emission of photo electrons due to incidence of light on a surface, is called photo electric effect. For it the energy of the incident light should be greater than the work function of the material on which light incidents.

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The true total mass of a galaxy cluster is much greater than the mass measured by adding up all the stars in all the galaxies of the cluster.


This is because the majority of the mass in a galaxy cluster is actually in the form of dark matter, which cannot be detected through traditional methods like observing stars. Dark matter is a mysterious substance that interacts only through gravity and is thought to make up about 85% of the matter in the universe.

Therefore, the true total mass of a galaxy cluster is much higher than what is visible through telescopes. Scientists use a variety of methods, such as gravitational lensing and the motions of the galaxies within the cluster, to estimate the amount of dark matter present and thus determine the true mass of the cluster. Understanding the distribution and amount of dark matter in galaxy clusters is an important part of studying the large-scale structure of the universe.

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