3. Consider the motion of the electron of a Hydrogen atom. whose Hamiltonian is H = p²/(2m) - e²/f, where e is the charge of the electron, mis its mass, and of the opera- tor representing the distan

Answer:

VOLTAGE

Explanation:

Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. ... A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit

Answer:

Yes it does

Explanation:

Answer:

The acceleration of the rocket is 20 m/s².

Explanation:

This can be calculated by dividing the change in velocity by the time it took to achieve that change in velocity. In this case, the change in velocity is 250 m/s - 50 m/s = 200 m/s, and it took 10 seconds, so the acceleration is 200 m/s / 10 s = 20 m/s².

Initial velocity = Vo= 25 m/s

Final velocity = V = x

Acceleration= a = 6 m/s^2

time= t = 4 seconds

Appy the equation:

V = Vo + at

Replacing:

V = 25 + 6(4) = 25 + 24 = 49 m/s

Answer:

light waves :)

Explanation:

Answer:

The relative velocity of the motorcycle to a passenger in the car is 30 km/h

Explanation:

The question relates to the principle of relative velocity and reference frames

The given parameters are;

The velocity of the motorcycle, v₁ = 120 km/h

The velocity of the car, v₂ = 90 km/h

The relative velocity of an object X with regards to another object Y is the velocity the object X will seem to be moving with to an observer in the rest frame of object Y written as \(\underset{v}{\rightarrow}_{X|Y}\) = \(\underset{v}{\rightarrow}_{X}\) - \(\underset{v}{\rightarrow}_{Y}\)

Therefore, the relative velocity of the motorcycle to the car is \(v_{1|2}\) = v₁ -  v₂, which give;

\(v_{1|2}\)  = 120 km/h - 90 km/h = 30 km/h

The relative velocity of the motorcycle to a passenger in the car = 30 km/h.

Answer:

Lateral Shift When a ray of light is incident on a glass slab, the emergent ray coming out of the slab will be parallel to the incident ray. The perpendicular distance between the direction of incident ray and emergent ray is called the lateral Shift. It is denoted by d.

Explanation:

Hope this helped :)

Answer:

This will require 266.9 of heat energy.

Explanation:

To calculate the energy required to raise the temperature of any given substance, here's what you require:The mass of the material, m The temperature change that occurs,  ΔT The specific heat capacity of the material,

c

(which you can look up). This is the amount of heat required to raise 1 gram of that substance by 1°C.

Here is a source of values of

c for different substances:

Once you have all that, this is the equation:

Q=m×c×ΔT(Q is usually used to symbolize that heat required in a case like this.)For water, the value of c is 4.186g°C So, Q=750×4.186×85=266=858=266.858

The correct answer is E) zero. Since the voltage is sinusoidal and the capacitor is independent of frequency, the capacitor will act as an open circuit to the AC signal.

This means that no current will flow through the capacitor and therefore no power will be dissipated. The formula for power dissipation in a capacitor is \(P = V^2 / XC\), where V is the voltage, XC is the capacitive reactance (which is inversely proportional to frequency), and C is the capacitance. Since the capacitor is independent of frequency, XC is infinite, making the power dissipation zero. Therefore, the answer is E) zero.

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A is the load that is powered by the circuit

B is the key that opens or closes the circuit

C is the cell that powers the circuit

D is the wire that transports the current in the circuit.

A circuit is an interconnection of components, such as electrical devices, that are connected together to form a complete and continuous path for the flow of electric current. A circuit allows electric current to flow from a power source, through various components, and back to the power source, creating a closed loop.

There are many different types of circuits, including simple circuits, series circuits, parallel circuits, and complex circuits. The components used in a circuit can include resistors, capacitors, inductors, switches, and transistors, which can be combined to perform various functions, such as amplifying signals, controlling the flow of current, and storing energy.

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your on here to lol we must be hella failing g

Answer:

To make a simple model of the solar system that can be used to compare the time it would take for a spaceship to travel between different planets, the student must accurately represent the relative distances between the planets. This is because the time it would take for a spaceship to travel between two planets depends on the distance between those planets, so accurately representing the distances between the planets is essential for thinking about how long it would take for a spaceship to travel between them.

It is not necessary for the student to make sure that the model of each planet looks like the planet it represents, although this may help make the model more understandable. The most important thing is that the model accurately represents the relative distances between the planets.

In summary, the student must accurately represent the relative distances between the planets in order to think about how long it would take for a spaceship to travel between different planets in the solar system.

1/second Equals 1.99 x 10-7 radians. Earth rotates at a rate of 1.99 x 10-7 per second.

If the angles were not approximately 1 one of, then the radius times the angle's measurement in radians, or the width of a arc s = r, would be the ratio of the distance by the point located on the circle. The result of substituting into the linear speed formula is v = r t or v = r t.

A pseudovector used in physics to express how quickly the angular location or orientation of an item changes over time is called an angular velocity or rotational velocity.

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Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

Answer:

A - B = 20 m/s

C - D = 10 m/s

section AB is moving fastest so A for the last question

if correct please give brainliest

Explanation:

speed = distance / time

AB - 200 / 10 = 20 m/s

CD - 300 / 30 = 10 m/s

Answer:

0.4Kg

Explanation:

Marcus pulled the toy with a force of 22.0N and the cat pulled it in the opposite direction with 19.5N

=> F1= 22N

F2= -19.5N

Therefore the net force on the toy= F1+F2

Fnet =22-19.5

Fnet =2.5N

Force= Mass* Acceleration

2.5= (Mass)*6.25

=> Mass=2.5/6.25

=0.4Kg

Therefore the mass of the toy is 0.4Kg

The trade winds travel from the subtropical high to the equator. The trade winds are prevailing winds that blow from the subtropical high-pressure areas towards the equator.

These winds are characterized by their consistent direction and strength, and they play a crucial role in global atmospheric circulation patterns. The subtropical high-pressure zones are regions of high atmospheric pressure located around 30 degrees latitude in both the Northern and Southern Hemispheres. As air rises at the equator due to intense heating, it creates a low-pressure area. To equalize the pressure gradient, air flows from the subtropical high-pressure zones towards the equator, forming the trade winds. The trade winds are named so because they were historically used by traders sailing across the oceans for their reliable and consistent nature. They are characterized by their easterly direction, blowing from east to west in both hemispheres. The trade winds are an integral part of the global atmospheric circulation system and have a significant impact on climate patterns and ocean currents.

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None of the given options (a, b, c) accurately represents the speed of the motor at a load torque of 10 Nm. To determine the speed of the DC shunt motor at a load torque of 10 Nm, we can use the torque-speed characteristic of the motor. The correct option is D.

To determine the speed of the DC shunt motor at a load torque of 10 Nm, we can use the torque-speed characteristic of the motor. The torque-speed characteristic relates to the torque and speed of the motor.

Given:

Tr = 65 Nm (torque at rated speed)

Ts = 240 Nm (torque at stall)

Rated speed = 1250 RPM

To calculate the speed at a load torque of 10 Nm, we can use the following formula:

Speed = Rated Speed * (1 - (Load Torque / Rated Torque))

First, we need to calculate the rated torque. Since the rated torque is not directly given, we can use the torque-speed characteristic to find the rated torque. At the rated speed of 1250 RPM, the torque is given as Tr = 65 Nm.

Now, we can calculate the speed at the load torque of 10 Nm:

Speed = 1250 RPM * (1 - (10 Nm / 65 Nm))

Simplifying the equation:

Speed = 1250 RPM * (1 - 0.1538)

Speed = 1250 RPM * 0.8462

Speed = 1057.75 RPM

To convert the speed from RPM to radians per second (rad/s), we can use the conversion factor: 1 RPM = 0.10472 rad/s.

Speed = 1057.75 RPM * 0.10472 rad/s

Speed ≈ 110.72 rad/s

Therefore, none of the given options (a, b, c) accurately represents the speed of the motor at a load torque of 10 Nm.

The correct option is D.

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Answer:

An object is considered to be accelerating if the object is changing its rate in speed, decreases in speed, or changes the object's direction

Answer:

don't know it is very complicated question

Answer: When it slows down or speeds up. Depending on which, it is appropiate.

Explanation:

we now want to understand what happens when a pulse moving to the right reflects of the end of the string. specifically,  We will assume that when a pulse moving to the right reflects off  then returns back ,the end of the string, it undergoes a change in direction and returns back

When a pulse travels along a string, it carries energy and momentum. When it encounters a boundary, such as the end of the string, the wave encounters a change in the properties of the medium, which leads to reflection.

During reflection, the pulse experiences a reversal in direction due to the change in the medium's properties. In the case of a string, the boundary at the end of the string acts as a fixed point, preventing the pulse from traveling further. As a result, the pulse undergoes a complete reversal in direction and starts propagating back along the string.

During the reflection process, other properties of the pulse can also be affected. For example, the pulse may undergo a change in amplitude or shape, depending on the characteristics of the boundary and the nature of the pulse. Some energy may also be absorbed or transmitted across the boundary, depending on the specific properties of the medium and the boundary itself.

The reflection of waves is a fundamental phenomenon that occurs in various contexts, not only in strings but also in other wave phenomena, such as sound waves and electromagnetic waves. Understanding wave reflection allows us to analyze and predict how waves interact with boundaries and how their properties change as a result.

In summary, when a pulse moving to the right reflects off the end of a string, it undergoes a reversal in direction and propagates back along the string. This behavior is a consequence of wave reflection, where the properties of the medium and the boundary cause the pulse to change its direction of propagation.

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Nuisance static charges are more likely to occur when the air is dry.

When the air is dry, it is not able to hold a sufficient amount of moisture or humidity. When the moisture content of the air is low, the air has a low electrical conductivity, which increases the likelihood of static charges.Static electricity can be created by the rubbing of two objects. When these objects are separated after rubbing, they are left with a static electric charge. The strength of the electric charge is determined by the materials used to create the two objects. Some materials are better at holding static charges than others.

Dry air only exacerbates the situation. Static charges can be a nuisance for a variety of reasons. They can cause shocks, interfere with electronic devices, and can even cause damage to sensitive equipment. In order to reduce the occurrence of static charges, it is important to ensure that the air in your environment is sufficiently humid. This can be achieved by using a humidifier or by simply placing bowls of water around the room. Additionally, anti-static products, such as sprays and mats, can be used to reduce the occurrence of static charges.

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The wavelength of a photon that has energy of 1j is 19.878 ×10^-17 nm.

The energy of photon is given by,

E=h × frequency

where h is known as planck's constant whose value is

\(6.626 \times {10}^{ - 34} js\)

Frequency : it is the reciprocal of time period . it can be defined as number of Occurance of repeating events per unit time.

f=1/T

si unit is :

\( {s}^{ - 1} \)

The formula of frequency is :

f = c/ lambda

where c is the velocity of light whose value is 3×10^8m/s and lambda is the wavelength.

Thus,

\(energy = \frac{h.c}{lambda} \)

And,

\(wavelength = \frac{h.c}{energy} \)

\(lambda = \frac{6.626 \times {10}^{ - 34} js \times 3 \times {10}^{8} \frac{m}{s} }{1j } = 19.878 \times {10}^{ - 26} m\)

Hence the wavelength of photon is 19.878×10^-26 m Or 19.878×10^-17 nm.

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Disclaimer :the data in the question is incomplete that is the options are not correct or incomplete.

Question: what is the wavelength of a photon that has an energy of 1 j.

(a) 19.878×10^-17 nm

(b) 19.878×10^-18nm

(c) 19.878×10^-16nm

(d) 19.878×10^-15nm

(e) 19.878×10^-20nm

Answer:n

Explanation:

This question involves the concepts of the parallel combination of springs, Hooke's Law and equivalent spring constant.

Each spring will stretch by "25 cm".

For static condition of spring:

Weight of Brick = Extension Force

using Hooke's Law:

\(mg = kx\)

Consider the following data for a single spring:

K₁ = spring constant of single spring = K

x₁ = stretch in single spring = 50 cm

m = mass of brick

g = acceleration due to gravity

Therefore,

\(mg = k_1x_1\\mg = K(50\ cm) ---- eqn(1)\)

Now, for the second scenario, where two identical copies of the single spring are placed side by side in a parallel combination:

K₂ = Equivalent spring constant of the parallel combination of springs

K₂ = K + K = 2K

x₂ = stretch in each spring in the parallel combination of springs = ?

m = mass of brick

g = acceleration due to gravity

Therefore,

\(mg = k_1x_1\\mg = 2K(x_2) ---- eqn(2)\)

dividing eqn (1) and eqn(2), we get:

\(1 = \frac{50\ cm}{2x_2}\\\\\)

x₂ = 25 cm

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The attached picture illustrates Hooke's Law.

The velocity of the airplane will be 301.85 meters per second.

The velocity of the airplane is given as,

v = m√(γRT)

Where γ is the polytropic index (1.14), R gas constant, and T is the temperature.

An airplane is flying at a standard altitude of 5 km. A pitot tube mounted at the nose measures pressure of 0.957 bar.

From the table, the static pressure (p) and static temperature (T) will be 54019.91 Pa and 255.5 K.

Then the static density is given as,

P = p / RT

P = 54019.91 / (287 x 255.5)

P = 0.737 kg / m³

We know that the formula

\(\begin{aligned} \left ( \dfrac{P_o}{P} \right )^{\frac{\gamma -1}{\gamma }} &= 1 + \dfrac{\gamma - 1}{2}m^2\\\\\left ( \dfrac{0.957 \times 10^5}{54019.91} \right )^{\frac{1.4 -1}{1.4}} &= 1 + \dfrac{1.4- 1}{2}m^2\\ \end{aligned}\)

On simplifying, we have

m = 0.9421 kg

Then the velocity of the airplane is given as

v = 0.9421 × √(1.4 × 287 × 255.5)

v = 301.85 m/s

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The speed of the petunia rolls is obtained from the calculation as 12.8 Km/hr.

The term speed is the ratio of the distance to the time that is taken by a body. We know that speed is how we would know how fast or slow that a material is moving and the unit that we can use to measure the speed of an object is kilometers per hour.

Distance covered by the object = 16Km

Time taken by the object = 1.25hrs

Speed = Distance/ Time

Speed =  16Km/ 1.25hrs

= 12.8 Km/hr

The speed is 12.8 Km/hr.

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