Static electric fields are caused by charged particles. What characterizes a positively charged particle?
A
The atoms which compose the particle will have more electrons than protons.

B
The atoms which compose the particle will have the same number of electrons as protons.

C
The atoms which compose the particle will have more protons than electrons.

D
By convention, positively charged particles always have all their magnetic dipoles aligned with the north pole.

Answers

Answer 1

Static electric fields are caused by charged particles when the atoms which compose the particle will have the same number of electrons as protons.

Each point in space has an electric field associated with it when the charge of any kind is present. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.

Both the electromagnetic wave produced by a radio broadcast monopole antenna and the field created in the dielectric of a parallel-plate capacitor are examples of electric fields (which create a time-varying field). Every place in space where a charge, regardless of its shape, is present is said to have an electric field, which is an electric attribute. The electric field's equation is given as E = F / Q.

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Related Questions

how to find out the heat capacity of a material?​

Answers

[tex]\huge\underline{\underline{\boxed{\mathbb {EXPLANATION}}}}[/tex]

The heat capacity is given by the expression:

[tex]\longrightarrow \sf{\triangle Q= m \triangle C \triangle T}[/tex]

[tex]\longrightarrow \sf{Q= \: Heat}[/tex]

[tex]\longrightarrow \sf{M= \: Mass}[/tex]

[tex]\longrightarrow \sf{C= \: Specific \: Heat}[/tex]

[tex]\longrightarrow \sf{T= \: Temperature}[/tex]

[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]

[tex] \leadsto[/tex] When the [tex] \bm{heat}[/tex] is measured in the calorimeter, we obtain a value, and since we know the mass of the material and we control the change in [tex] \bm{temperature}[/tex] , we can then determine the specific heat "C" by simply remplazing in the expression.

The heat capacity of a material is its ability to absorb heat energy. There are different methods to determine the heat capacity of a material, depending on the specific conditions and resources available. Here are some common approaches:

Differential Scanning Calorimetry (DSC): DSC is a technique used to measure heat flow into or out of a material as a function of temperature. By subjecting the material to controlled heating or cooling, the heat capacity can be determined from the measured heat flow data.Specific Heat Capacity Measurement: The specific heat capacity of a material is the amount of heat energy required to raise the temperature of a unit mass of the material by one degree Celsius (or Kelvin). This can be determined through calorimetry experiments, where the material is heated or cooled while its temperature changes and heat transfer amount are measured. The specific heat capacity can then be calculated using the equation: Q = mcΔT, where Q is the heat energy transferred, m is the mass of the material, c is the specific heat capacity, and ΔT is the temperature change.Tabulated Data: The heat capacity of some commonly used materials is available in reference books, handbooks, or online databases. These values are often given as average or estimated values based on previous measurements. By referencing such data, you can obtain an approximate heat capacity value for a specific material.Statistical Data: The heat capacity of some commonly used materials is available in reference books, handbooks, or online databases. These values are often given as averages or estimates based on previous measurements. By referencing such data, you can obtain an approximate heat capacity value for a specific material.

It's imperative to note that heat capacity can vary with temperature, pressure, and other factors. Therefore, measurements or data should ideally be conducted or referenced within the appropriate range of conditions relevant to the specific application or analysis.

The capacity for doing work that a body possesses because of its position or configuration is known as:____.

Answers

The capacity for doing work that a body possesses because of its position or configuration is known as Potential Energy.

What is Potential energy?Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.The gravitational potential energy of an object, which is based on its mass and distance from another object's center of mass.The elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are examples of common types of potential energy.The joule, denoted by the letter J, is the energy unit in the International System of Units (SI).Potential energy is connected to forces that affect a body in such a way that their combined work is only dependent on the body's beginning and ultimate positions in space.At any point in space, these forces, also known as conservative forces, can be represented by vectors that are gradients of a particular scalar function known as potential.

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Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410. 1 nm

Answers

The energy of the violet light emitted by a hydrogen atom with a wavelength of 410. 1 nm will be 4.85 * [tex]10^{-19}[/tex] J

Light energy is a form of electromagnetic radiation that comprises wavelengths that the common human eye can detect. Light is a type of kinetic energy. It consists of particles like photons, which have wave-like properties. It can affect the physiology of an organism, like photosynthesis or the sense of sight.

Energy = h*c / lambda

where

h = plank's constant  =  6.626 * [tex]10^{-34}[/tex] J-s

c = speed of light  = 3 * [tex]10^{8}[/tex] m/s

lambda = wavelength = 410. 1 nm = 410. 1  * [tex]10^{-9}[/tex] m

Energy = 6.626 * [tex]10^{-34}[/tex] *  3 * [tex]10^{8}[/tex]  / 410. 1  * [tex]10^{-9}[/tex]

            = 4.85 * [tex]10^{-19}[/tex] J

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Transformers: an ideal step-up transformer doubles a primary voltage of 110 v. what is the ratio of the number of turns in its primary coil to the number of turns in the secondary coil?

Answers

The ratio of the number of turns in the primary and the secondary coil of a step-up transformer is 1 : 200.

The formula for calculating the secondary voltage in a transformer is: N = V = Where No and N are the primary and secondary coils' respective turn counts; V and V are the RMS voltages across the primary and secondary coils, and I and Is are the primary and secondary currents.

Calculation: Due to this:

The coil's N2 to Ns turn ratio is 1/20.

We understand that N=1/20 = 4/LP: Is = 20:1.

The transformer uses the following principles: A wire's magnetic field moves as a result of a changing current flowing through it. A wire exposed to a moving magnetic field will create a changing current.One of the coils produces a magnetic field that grows and contracts in response to the changing voltage of the AC when an AC source is connected to it.

In other words, the coil generates a growing magnetic field as the voltage across it rises. The magnetic field generated around the capacitor increases when the voltage reaches its maximum and starts to decline.

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Q3. You throw a ball into the air, it reaches a certain height and then comes back to you.
(a) On the way up, what are the directions of the velocity and the acceleration? Does the ball speed up or slow down?
(b) On the way down, what are the directions of the velocity and the acceleration? Does the ball speed up or slow down?


Q4. (a) Is a car going around a curve at 50 km/hr experiencing acceleration? Explain why or why not.
(b) Is a skateboard coasting down a hill at 2 m/s experiencing acceleration? Explain why or why not.
(c) Is a car stopping at an intersection experiencing acceleration? Explain why or why not.

Answers

The If a car is going round a curve , there is an acceleration because the direction of the velocity changes.

What is the direction of the velocity?

Now we know that if you throw the ball upwards, the motion is in opposite direction to gravity thus the ball is experiencing deceleration and the speed decreases. The velocity decreases and the acceleration is negative.

If the ball is coming down, then the ball is accelerated thus it speeds up and the direction of the acceleration is positive.

If a car is going round a curve, the vehicle is accelerating because the direction of the velocity changes even if its amount remains constant.

When a board is moving down a hill at 2 ms-1, it is experiencing an acceleration because the motion is in the same direction as gravity.

If a car is coming to a stop at a point, it experiences a deceleration and not an acceleration since the change of velocity with time is negative as the car comes to rest.

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Ritemade machinery, inc., designs, makes, and sells a drill press. steel equipment company copies the design without ritemade's permission. steel's conduct is actionable provided that:_______

Answers

Ritemade machinery, inc., designs, makes, and sells a drill press. steel equipment company copies the design without ritemade's permission. steel's conduct is actionable provided that RiteMade's design is patented.

A design patent is a form of legal protection of the unique visual qualities of a manufactured item. A design patent may be granted if the product has a distinct configuration, distinct surface ornamentation or both or A patent is an exclusive right granted for an invention.

In other words, a patent is an exclusive right to a product or a process that generally provides a new way of doing something, or offers a new technical solution to a problem.

If you create original sketches of your designs, those sketches are protected by copyright law. That means that no one can copy, distribute, publicly display, etc. your sketch without your permission.

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Calculate the energy of the red light emitted by a neon atom with a wavelength of 703. 2 nm. plank's constant (h) = 6. 62607 × 10-34 j. s

Answers

The energy of the red light emitted by a neon atom is 2.827*10^-19J

Light produces photons which might be small packets of power. as the atoms of an object are heated, it results within the manufacturing of photons. The electrons locate pleasure from the warmth and produce extra energy. This power emits inside the shape of a photon, and extra photons are released because the cloth becomes hotter.

The SI unit of wavelength is metre typically denoted as m. at the same time as measuring wavelength the multiples or fractions of a metre is also used. extensively, exponential powers of 10 are used while wavelengths are of a huge property. while there are shorter wavelengths they're expressed as negative exponential.

c=3*10^8 h=6.626*10^-34

wavelength= 703.2*10^-9m

E=2.827*10^-19J

Hence energy of the red light is 2.827*10^-19J.

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Define Drift velocity​

Answers

A drift velocity in physics is the average speed that charged particles—like electrons—achieve within a material as a result of an electric field. An electron will typically move randomly across a conductor at the Fermi velocity, producing an average velocity of zero. Applying an electric field causes a little net flow in one direction to be added to this random motion; this is the drift.

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Drift velocity

it is a average speed of the particle reached in a random motion

What happens to the observed wavelength if the source of a wave travels toward an observer?

Answers

If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases.

What is dopper effect?The Doppler effect defines the shift in frequency of a wave sound caused by movement of the wave source and/or receiver. We'll talk about it in terms of sound waves, but the Doppler effect applies to any type of wave. The Doppler effect, like ultrasound, has a wide range of uses, from medical (with sound) to police radar and astronomy (with electromagnetic waves).The Doppler effect happens when there is relative motion between the observer and the source, not just for sound. Doppler shifts, for example, occur in the frequency of sound, light, and water waves. When ultrasonography is reflected from blood in a medical diagnosis, Doppler shifts can be utilized to assess velocity.

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A red wagon with a mass of 7kg is moving with a velocity of 4 m/s straight toward a blue wagon at rest.

Answers

[tex]\huge\underline{\underline{\boxed{\mathbb {SOLUTION:}}}}[/tex]

Apply the Conservation of Linear Momentum:

[tex]\longrightarrow \sf{m_1 u_1 +1 + m_2 u_2 = m_1v_1 + m_2v_2}[/tex]

[tex]\longrightarrow \sf{(7 \cdot 4) + (1 \cdot 0) = (7 \cdot 3) + 1v_2}[/tex]

Solving further:

[tex]\longrightarrow \sf{28+0 = 21+ v_2}[/tex]

[tex]\longrightarrow \sf{28 = 21+ v_2}[/tex]

[tex]\longrightarrow \sf{v_2= 28- 21}[/tex]

[tex]\longrightarrow \sf{v_2= 7 \dfrac{m}{s} }[/tex]

[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]

[tex] \boxed{\bm{v_2= 7 \dfrac{m}{s}}}[/tex]

A baseball pitcher throws a fastball with a 100 ns impulse. if he applied the force in 0. 15 seconds, what force did he apply?

Answers

Answer:

The force he will apply is 666.667 N

Explanation:

The impulse is given as the product of Force and time:

              Impulse (I) = F * t

As we are provided with the impulse and that is:

I = 100 ns and t = 0.15 s

So, required force is:

                 F = I/t

                 F = 100/0.15

                 F = 666.6667 N

If the angular speed of a 1. 1-m baseball bat is 2. 0 rad/s, what is the tangential speed of the tip of the bat?.

Answers

The tangential speed of the tip of the bat is 2.2 m/sec.

What is tangential speed?

Any item travelling in a circular direction has a tangential velocity, which is its linear speed. In one full round of a turntable, a point at the outside edge travels further than a point close to the center.

The formula for tangential velocity is given by-

[tex]V_{r}[/tex] = rω

r = radius of the circular path (m)

ω = angular speed

According to the question;

The angular speed of bat is  2. 0 rad/s.

The length of the bat is equal to radius of circular path = 1.1 m.

Angular speed = angular displacement/time

ω = Ф/t

2 = Ф/t

(∵ Ф = s/r); s is the actual distance travelled.

2 = s/(r×t)

s/t = r×2

    = 1.1×2

s/t = 2.2

v = 2.2 (∵ s/t = v)

Therefore, the tangential speed of the tip of the bat is v = 2.2 m/sec.

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When a 20. 0-ohm resistor is connected across the terminals of a 12. 0-v battery, the terminal voltage of the battery falls 0. 30 v. what is the internal resistance of this battery

Answers

Answer:

.513 Ω

Explanation:

The current through the 20 Ω load can be found to be

  (12-.3) v / 20 Ω  = .585 A

This current also flows through the internal resistance and produces the .3 v drop across this resistor

V/I  = R

.3 v / .585 A = .513 Ω  internal resistance

Why are the magnetic fields of superconducting magnets often stronger than those of conventional magnets?

Answers

The superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.

To find the answer, we have to know more about the superconducting magnets.

What is superconducting magnet?An example of an electromagnet is a superconducting magnet. They are constructed from coils of superconducting wire and must be used while being chilled to cryogenic temperatures. Because the wire encircling the magnet has no electrical resistance when it is in its superconducting condition, they may produce powerful magnetic fields. Because of this, the magnet can conduct far greater electrical currents than the typical electromagnet.

Thus, we can conclude that, the superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.

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One or more objects may be created from a(n) ________.
a. field
b. instance
c. method
d. class

Answers

The answer is (d) class

One or more objects may be created from a class.

Class objects normally have methods that perform useful operations on their data.

What is class?

A class in object-oriented programming is a template specification of the method s and variables in a certain type of object. As a result, an object is a specific instance of a class that holds real values rather than variables. The class is a key concept in object-oriented programming.You may also construct a class object and use it in another class. This is frequently used to improve class structure (one class has all of the properties and methods, while the other class contains the main() method (code to be run).

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One or more objects may be created from a class.

Class objects contains methods which perform useful operations on their data.

A class in object-oriented programming refers to a template specification of the methods and variables in a a type of object.

An object is a specific instance of a class that holds real values rather than variables.

The class is a key concept in object-oriented programming.

We may also construct a class object and use it in another class. It is frequently used to improve the structure of class.

Hence, one or more objects may be created from a class.

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Light enters a glass plate at an angle of incidence of 25°. If the index of refraction of a glass is 1.6, the angle of refraction is

a. 15°
b. 16°
c. 40°
d. 43°

Answers

The angle of refraction is a. 15°

What is the Snell's law?

Snell's law is described as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given team of media”.

By Snell's law:

η = sin i / sin r. i = 25, η = 1.6

1.6 = sin25° / sin r

sin r = sin25° / 1.6

= 0.4226/1.6= 0.2641

calculating

r = sin⁻¹( 0.2641 )

sin−1(0.264) is ≈ 15.3075

the angle of refraction is a. 15°

What is Snell's first law?

So the angle associated with the incidence and refraction can have a relation to the refractive index of the two mediums. Snell's First Law: It states that the incident ray, the refracted ray and the standard lie on the same plane.

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Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Answers

Adding more oxygen to the reaction and changing the reactants from solid form to powdered form will increase the rate of reaction during combustion.

What are factors on which rate of chemical reactions depend?

The rate of a chemical reaction is affected by a number of factors, including temperature, the concentration of the reactants, the presence of a catalyst, and others.

The rate of a chemical reaction rises with temperature because more reactant and product particles will collide as a result of the higher temperature.By converting the reactants from a solid into a powder, more collisions between the reactant particles will occur, which will speed up the production of the products. Increasing the surface area of the reactants also increases the rate of reaction.The rate of reaction will grow when the concentration of the reactants, such as increasing the amount of oxygen in the reaction that is one of the reactants, increases.

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A 1300 kg sports car can accelerate from 0 to 27 m/s in 5.2 seconds. How much power from the engine is directly going into accelerating the car? Group of answer choices 474,000 W 3375 W 35,100 W 91,100 W

Answers

The power expended is calculated as 91,100 W.

What is the power?

We know that the acceleration can be obtained by the use of the equation;

v = u + at

v = final velocity

u = initial velocity

t = time

a = acceleration

a= v - u/t

a =  27 - 0/ 5.2 = 5.2 m/s^2

Thus;

v^2 = u^2 + 2as

but u= 0 m/s

v^2 = 2as

s =  v^2/2a

s = (27)^2/2 * 5.2

s = 70 m

Now;

Work done =  1300 kg * 5.2 m/s^2 * 70 m = 473200 J

Power = 473200 J/5.2 seconds

Power =  91,100 W

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Describe what the sun would look like from earth if the entire photosphere were the same temperature as a sunspot?

Answers

The sun would look like from earth if the entire photosphere were the same temperature as a sunspot then wouldn't see anything from Earth but darkness

The lowest layer of the sun is the photosphere. It is the outer layer of the sun. It is the deepest region of the luminous object. It is composed of convection cells which are called granules . The Sun's photosphere has a temperature between 4,500 and 6,000 K

Sunspots are areas where the magnetic field is about 2,500 times stronger than Earth's, much higher than anywhere else on the Sun.  Because of the strong magnetic field, the magnetic pressure increases while the surrounding atmospheric pressure decreases.

Sunspots tend to occur in pairs that have magnetic fields pointing in opposite directions.  A typical spot consists of a dark region called the umbra, surrounded by a lighter region known as the penumbra.  

The sunspots appear relatively dark because the surrounding surface of the Sun (the photosphere) is about 10,000 degrees F, while the umbra is about 6,300 degrees F.  Sunspots are quite large as an average size is about the same size as the Earth.

If the photosphere were of the same temperature as the sunspot, then we wouldn't see anything from Earth but darkness. We were only able to see and recognize the sunspot because it is surrounded by the visible photosphere.

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Which three steps, placed in the proper order, are required for a nuclear chain reaction?.

Answers

There are three basic steps in a nuclear fission chain reaction are Initiation, Propagation, Termination.

What are the three steps of nuclear fission ?

1. Initiation

The nuclear fission  of [tex]U_{235} ^{92}[/tex] is started by the absorption of a neutron; a single atom must react in order for the chain reaction to begin.

2. Propagation:-

With each stage producing additional product, this component of the process is repeated repeatedly. When [tex]U_{236} ^{92}[/tex] splits apart, neutrons are released, which start the nuclear fission of more uranium atoms.

3. Termination:

The chain will come to an end eventually. Termination might take place if the reactant [tex]U_{235} ^{92}[/tex] is exhausted or if the subsequent neutrons in the chain leave the sample without being absorbed by [tex]U_{235} ^{92}[/tex].

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According to the solar nebula theory,whyisthereacommon direction of revolution and rotation for most objects in the solar system?

Answers

According to the solar nebula theory, the common direction of revolution and rotation for most objects in the solar system is because most objects in the Solar System have a common direction of revolution and rotation because they formed from the same rotating gas cloud.

The nebular theory states that our solar system formed from the gravitational collapse of a giant interstellar gas cloud—the solar nebula.

In nebula hypotheses its been said that solar system formed at the same time as the Sun . The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets

Laplace theorized that the Sun originally had an extended hot atmosphere throughout the Solar System, and that this protostar cloud cooled and contracted. As the cloud spun more rapidly, it threw off material that eventually condensed to form the planets.

Since , Most objects in the Solar System have a common direction of revolution and rotation because they formed from the same rotating gas cloud.

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Two electric charges qa = 1. 0 μc and qb = - 2. 0 μc are located 0. 50 m apart. how much work is needed to move the charges apart and double the distance between them

Answers

The total work done of 0.018 joules is needed to move the charges apart and double the distance between them.

We have two electric charges q(A) = 1μc and q(B) = -2μc kept at a distance 0.5 meter apart.

We have to calculate  much work is needed to move the charges apart and double the distance between them.

What s the formula to calculate the Potential Energy of a system of two charges (say 'q' and 'Q') separated by a distance 'r' ?

The potential energy of the system of two charges separated by a distance is given by -

[tex]U = \frac{1}{4\pi\epsilon_{o} } \frac{qQ}{r}[/tex]

In order to solve this question, it is important to remember the work - energy theorem which states -

"The change in the energy of the body is equal to work done on it"

Hence, using this work -energy theorem in the question given to us we get -

[tex]U_{f} -U_{i} =W_{net}[/tex]

In our case -

[tex]U_{f} = \frac{1}{4\pi\epsilon_{o} } \frac{qQ}{2r}\\\\U_{i} = \frac{1}{4\pi\epsilon_{o} } \frac{qQ}{r}\\\\W=\frac{1}{4\pi\epsilon_{o} } \frac{qQ}{2r} - \frac{1}{4\pi\epsilon_{o} } \frac{qQ}{r}\\\\W = \frac{qQ}{4\pi\epsilon_{o}r} (\frac{1}{2} -1)\\\\W = 9\times 10^{9}\times \frac{1 \times 10^{-6} \times 2\times10^{-6} }{0.5} \times \frac{-1}{2}[/tex]

W = 0.018 joules

Hence, the total work done should be 0.018 joules.

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A mass weighing 16 pounds is attached to a spring whose spring constant is 25 lb/ft. what is the period of simple harmonic motion?

Answers

The time period of the spring - mass system undergoing simple harmonic motion is 5.024 seconds.

We have a mass weighing 16 pounds which is attached to a spring whose spring constant is 25 lb/ft . This complete spring - mass system is undergoing simple harmonic motion.

We have to calculate the time period of this simple harmonic motion.

What is the formula to calculate the Time period of a spring - mass system performing Simple harmonic motion?

The formula to calculate the time period of a spring - mass system undergoing simple harmonic motion is -

[tex]T=2\pi \sqrt{\frac{m}{k} }[/tex]

Where -

T is the time period of spring - mass simple harmonic motion.

m is the mass of body

k is the spring constant

In the question given -

mass (m) = 16 pounds

Spring constant (k) = 25 lb/ft

Substituting the values in the formula above -

T =  [tex]2\pi \sqrt{\frac{16}{25} }[/tex]  = [tex]\frac{2\pi \times4}{5}[/tex]  = 5.024 seconds

Hence, the time period of the spring - mass system undergoing simple harmonic motion is 5.024 seconds.

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A resistor dissipates 2. 00 ww when the rms voltage of the emf is 15. 0 vv. part a at what rms voltage will the resistor dissipate 14. 0 ww ?

Answers

At rms voltage ([tex]V_{rms}[/tex]) = 39.59V resistor will dissipate 14.0W.

The term "alternating current" (AC) describes a current in which the voltage and current both take the shape of sinusoidal waves. Root mean square value is indicated by the letter "rms." Both the mean voltage and mean current of an alternating circuit are represented by it.

Also, power dissipated is

P = [tex]V^{2} _{rms}[/tex] / R

2 = [tex]15^{2}[/tex] / R

2 = [tex]\frac{225}{R}[/tex]

R = 112Ω

If P = 14 W,

[tex]V^{2} _{rms}[/tex] = PR

[tex]V^{2} _{rms}[/tex] = 14×112

[tex]V^{2} _{rms}[/tex] = √1568 = 39.59V

Therefore, at rms voltage ([tex]V_{rms}[/tex]) = 39.59V resistor will dissipate 14.0W.

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What is the frequency of a photon that has the same momentum as a neutron moving with a speed of 1400 m/s?

Answers

The frequency of a photon is  1.06 * [tex]10^{18}[/tex] Hz.

The mass of a neutron is:

m = 1.67 * [tex]10^{-27}[/tex] kg

Since we know its speed, we can calculate the neutron's momentum:

p = mv = (1.67 * [tex]10^{-27}[/tex] kg)(1400 m/s) = 2.34 * [tex]10^{-24}[/tex] kg m /s

The problem says the photon has the same momentum of the neutron, p.  The photon momentum is given by

                                               p = h / λ              

where h is the Planck constant, and  λ  is the photon wavelength. If we re-arrange the equation and we use the momentum we found before, we can calculate the photon's wavelength:

p = h / λ =  [6.6 * [tex]10^{-34}[/tex] J/s]  /  [2.34 * [tex]10^{-24}[/tex] kg m /s ]

             = 2.82 * [tex]10^{-10}[/tex] m

And since we know the photon travels at speed of light c, we can now calculate the photon frequency:

f = c /  λ  =  [3 * [tex]10^{8}[/tex] m/s] / [ 2.82 * [tex]10^{-10}[/tex] m ]

              = 1.06 * [tex]10^{18}[/tex] Hz.

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How wide in m is a single slit that produces its first minimum for 631-nm light at an angle of 12. 0°? m

Answers

The single slit  is 3.34 * [tex]10^{-5}[/tex] m wide .

In the single-slit diffraction experiment, we can observe the bending phenomenon of light or diffraction that causes light from a coherent source to interfere with itself and produce a distinctive pattern on the screen called the diffraction pattern.

Diffraction is evident when the sources are small enough that they are relatively the size of the wavelength of light.

Fringe width is defined as the distance between any two consecutive bright or dark fringes.

Using the formula ,

nλ = a sin θ

a = nλ /sin θ

a  = (1) (631 *[tex]10^{-9}[/tex] ) / sin (12)

a = 3.34 * [tex]10^{-5}[/tex] m

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What is the change in internal energy of the system (δu) if 71 kj of heat energy is absorbed by the system and 12 kj of work is done on the system for a certain process?

Answers

From the first law of Thermodynamic, the change in internal energy of the system is 83 KJ.

What is Internal Energy of a system ?

The Internal energy of a system is the sum of the random distribution of kinetic and potential energies of its atoms or molecules. Internal energy can be increased by

HeatingCompressionPassing of electric current through it.

Looking for the change in internal energy of the system If 71 KJ of heat energy is absorbed by the system and 12 KJ of work is done on the system for a certain process,

From the first law of Thermodynamic,

ΔU = Q + W

Where

ΔU = Increased in internal energy = ?Q = Energy supplied by heating = 71 KJW = Energy supplied by doing work = 12 KJ

Substitute all the parameters into the formula

ΔU = 71 + 12

ΔU = 83 KJ

Therefore, the change in internal energy of the system is 83 KJ.

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Oppositely charged objects attract each other. this attraction holds electrons in atoms and holds atoms to one another in many compounds. however, ernest rutherford’s model of the atom failed to explain why electrons were not pulled into the atomic nucleus by this attraction. what change to the atomic model helped solve the problem seen in rutherford’s model? bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder. bohr’s work with cathode rays led him to say that the electrons were located within the mass of positive material, like plums in a pudding. thomson’s work with cathode rays led him to say that the electrons were located within the mass of positive material, like plums in a pudding. thomson’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

Answers

The deficiency in Ernest Rutherford’s model of the atom about electron orbits was solved by Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder; option A.

What are atomic models?

Atomic models are those models which were used to describe the structure of atoms by various scientists.

The models of the atom include:

Thompson's plum pudding modelRutherford's planetary modelBohr's model

Because of certain deficiencies found in the atomic models by the various scientists, several modifications were made on the atomic model.

The fact that Ernest Rutherford’s model of the atom failed to explain why electrons were not pulled into the atomic nucleus was explained by Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

In conclusion, atomic models were used to explain the structure of atoms.

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Answer:

The answer to this is A: Bohr’s work with atomic spectra led him to say that the electrons were limited to existing in certain energy levels, like standing on the rungs of a ladder.

Explanation:

I just did the quiz

The magnetic flux through a certain coil is given by phim = (1/50pi) cos( 100pi t) where the units are si. the coil has 100 turns. The magnitude of the induced emf (in volts) when t = 1/200 s is?

Answers

The magnetic flux through a certain coil is given by phim = (1/50pi) cos( 100pi t) where the units are si. the coil has 100 turns. The magnitude of the induced EMF (in volts) when t = 1/200 s is 1 / 50 π

Magnetic flux is defined as the number of magnetic field lines passing through a given closed surface. It provides the measurement of the total magnetic field that passes through a given surface area.

An EMF is induced in the coil when a bar magnet is pushed in and out of it. EMF of opposite signs are produced by motion in opposite directions, and the EMF are also reversed by reversing poles.

EMF =   d Ф / d t

Given phi = Ф =  (1/50pi) cos100pi t  

hence ,

EMF = d ((1/50pi) cos 100pi t ) / d t

       = 1/50π * cos 100 pi

       substituting value of pi

       = 1 / 50 π * cos (100 * 180)

       = 1/ 50 π * cos ( 1800 )

EMF = 1 / 50 π

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What 4 pieces of information do you need to gather while you’re stopped and waiting to turn at a traffic light?

Answers

The four pieces of information that you need to gather while you’re stopped and waiting to turn at a traffic light include the following Check rear, Check for a gap, Check path and Check signal.

What is traffic light?

Traffic light are those set of light signals found on the highway road side that helps in controlling and monitoring the moving vehicles.

The traffic light is made up of three lights which include the following:

Red light: This tells the driver to stop or wait.

Amber light: This signals the driver to stop where is safe because the light is about turning red.

Green lights: This shows that the driver can move.

When stopped by the traffic light you need to gather the following information to avoid tragic situations;

Check rear,

Check for a gap,

Check path and

Check signal.

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