a single optical coating reduces reflection to zero for λ=540nm. by what factor is the intensity reduced by the coating for λ=430nm as compared to no coating?assume normal incidence.

Option (C) is correct for an elastic collision between two objects.

i.e. both the total momentum and total kinetic energy are conserved.

The sum of the momentum of the two objects before the collision is equal to the sum of the momentum of the two objects after the collision, and the sum of their kinetic energy remains the same.In an elastic collision, both the total momentum and total kinetic energy are conserved.This is different from an inelastic collision where some of the kinetic energy is converted into other forms of energy and lost.

Option (A) is incorrect because the total momentum is conserved, not lost.

Option (B) is incorrect because both momentum and kinetic energy are conserved.

Option (C) is correct for an elastic collision between two objects. In an elastic collision, both the total momentum and total kinetic energy are conserved.

Option (D) is partially correct because the kinetic energy lost by one object is gained by the other object, but it doesn't take into account the conservation of the total kinetic energy.

Option (E) is partially correct because the magnitude of momentum lost by one object is gained by the other object, but it doesn't take into account the conservation of total momentum.

Option (F) is incorrect because total momentum is conserved in elastic collisions.

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The correct statement for elastic collision between two objects is (C) Both the total momentum and the total kinetic energy are conserved.

In an elastic collision, the two objects collide and rebound without any energy loss due to deformation or heat transfer. The kinetic energy is conserved because the total initial kinetic energy is equal to the total final kinetic energy after the collision. Additionally, the total momentum of the system is also conserved because the momentum of one object is transferred to the other during the collision. Therefore, the momentum gained by one object is equal to the momentum lost by the other object, making statement (E) also correct. Statement (A) is incorrect because the total momentum is also conserved. Statement (B) is incorrect because at least one of the conservation laws is always true in an elastic collision. Statement (D) is incorrect because the kinetic energy gained and lost by the objects is not necessarily the same. Statement (F) is also incorrect because the total momentum is conserved in elastic collisions.

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Answer:

a. potential energy

Explanation:

ur welcome

If an electron is moving in a horizontal straight line, it means that there is no force acting on it in the horizontal direction. However,

if there is a magnetic field present, it will exert a force on the moving electron in a direction perpendicular to both the velocity of the electron and the magnetic field.

The magnitude of this force is given by the equation F = Bqv, where F is the force, B is the magnitude of the magnetic field, q is the charge of the electron, and v is the velocity of the electron.

Since we know that the electron is moving in a straight line, we can assume that the force acting on it is balanced by some other force, such as the electrostatic force.

Therefore, we can set the magnitude of the magnetic force equal to the magnitude of the electrostatic force and solve for B.

Assuming the electron has a charge of e, and the electrostatic force is given by F = eqE, where E is the electric field, we can set the two forces equal to each other and get:

Bqv = eqE

Simplifying this equation, we get:

B = E(v/e)

Therefore, the magnitude of the magnetic field in terms of v and e is given by B = E(v/e). This equation shows that the magnitude of the magnetic field is proportional to

the electric field and the velocity of the electron, and inversely proportional to the charge of the electron.

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Answer:

Talc is the known mineral

Seismic movement, Volcanic Activity, Plate Tension

Answer:

a) P+Q represents one side.

Explanation:

As they are adjacent side of a parallelogram P and Q will be 2 individual sides and hence will not represent one side.

So that statement is incorrect

The final velocity of the second person after the collision is determined as 1.6 m/s to the right.

The final velocity of the second person is determined by applying the principle of conservation of linear momentum.

m1u1 + m2u2 = m1v1 + m2v2

85.2(0) + 65.4(0) = 85.2(-1.2) + 65.4(v2)

0 = -102.24 + 65.4v2

65.4v2 = 102.24

v2 = 1.56 m/s to the right

Thus, the final velocity of the second person after the collision is determined as 1.6 m/s to the right.

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The amplitude of the PWM voltage signal applied across the 600-ohm resistor can be determined by first calculating the power dissipated and then using Ohm's Law and the power formula.

To find the amplitude of the PWM voltage signal, we need to know the power dissipated by the resistor during one cycle. However, the given information does not provide the power dissipated by the resistor or any other details of the periodic signal. If you can provide more information about the power dissipated, I would be happy to help you with the calculation.

In order to calculate the amplitude of the PWM voltage signal applied across the 600-ohm resistor, more information is needed about the power dissipation during one cycle. Please provide the necessary details, and I will be glad to assist you with your question.

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In an incompressible flow, the speed at which an acoustic wave propagates depends on the physical properties of the medium through which it is traveling. Generally speaking, the speed of an acoustic wave in an incompressible flow is slower than in a compressible flow, since the latter can support pressure waves that move faster than sound.

The speed of an acoustic wave in an incompressible flow can be calculated using the following formula:

c = √(K/ρ)

where c is the speed of the wave, K is the bulk modulus of the medium (a measure of its resistance to compression), and ρ is its density.

For example, if we assume a bulk modulus of 2.3 GPa and a density of 1000 kg/m^3 (typical values for water), we get a speed of approximately 1500 m/s for an acoustic wave in an incompressible flow.

It's worth noting that this speed can vary depending on the exact conditions of the flow, as well as any obstructions or other features that might affect the propagation of the wave. Nonetheless, the above formula provides a useful starting point for understanding the speed of acoustic waves in incompressible flows.

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Because the current surge in starting multiple motors is too great for the system, a delay between the starting of each motor is necessary.

When multiple motors start simultaneously, they draw a significant amount of current, resulting in a high inrush current that can overload the electrical system. To prevent this, a delay is introduced between the starting of each motor. This delay allows the system to stabilize and accommodate the initial surge in current before the next motor is started. By staggering the motor start times, the overall current demand is distributed more evenly, reducing the strain on the electrical system. This practice helps to prevent voltage drops, voltage fluctuations, and potential damage to electrical components. Therefore, introducing a delay between the starting of each motor is essential to ensure the proper functioning and longevity of the system.

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Answer:

\(\boxed {\boxed {\sf d= 5 \ g/cm^3}}\)

Explanation:

Density can be found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass of the quartz is 30 grams and the volume is 6 cubic centimeters.

\(m=30 \ g \\v= 6 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{30 \ g}{6 \ cm^3}\)

Divide.

\(d= 5 \ g/cm^3\)

The density of this piece of quartz is 5 grams per cubic centimeter.

Answer:

The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.

The unmanned SpaceX rocket that exploded minutes after taking off was launched from Cape Canaveral, Florida, which is located in the United States.

An unmanned SpaceX rocket, known as the Falcon 9, exploded a few minutes after its launch from the Cape Canaveral Space Launch Complex in Florida, United States. The incident occurred on [date]. The rocket was carrying [payload information] and was intended for [mission objective].

The explosion took place during the ascent phase of the rocket's flight, resulting in a catastrophic failure. The exact cause of the explosion is typically investigated by SpaceX and relevant authorities to determine the root cause, which could range from technical malfunctions to operational errors.

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Answer:

21

Explanation: its actually 20.85 but i guess they round to 21

The winds aloft chart for the Great Lakes (Michigan is fine) region displays the wind direction and speed at several altitudes. At 3000 feet, the wind speed is approximately 17 knots.

At 12,000 feet, the wind speed is about 44 knots. The wind speed at FL350 is approximately 67 knots.Surface friction has an effect on the winds close to the ground, slowing them down due to the frictional force exerted on the ground by air molecules. The winds shift direction with altitude, veering to the right of the direction of travel in the northern hemisphere. The approximate location of the Jetstream can be obtained by examining the wind/temperature plot chart. The fastest wind speed at FL360 appears to be approximately 145 knots, traveling towards the northeast. Flight to the east or southeast would benefit from this wind speed.Seasonally, winds aloft change depending on the position of the jet stream, which moves towards the poles during the summer months and towards the equator during the winter months.

The current surface analysis chart (Prog chart) shows the major frontal activity passing through the Midwest states. Precipitation is what leads the frontal passage in general, with both temperature and wind speed/direction changing from behind to ahead of the front.

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Answer:

1) four lines

2) three lines

3) fives lines

4) six lines

Answer:

4

Explanation:

Answer:

12.3°C should be the correct answer

Answer:

12.3

Explanation:

Answer:

5000°A

Explanation:

If it is right answer so please mark me as brainleist anwer as ur wish

Answer:

Explanation:

The mass of the car doesn't matter because On a flat curve the mass of the car does not affect the speed at which it can stay on the curve. You would need the mass if you were solving the the centripetal force acting on the car, but not the acceleration.

\(a=\frac{v^2}{r}\) and filling in

\(a=\frac{(8.5)^2}{48.0}\) and we need 2 significant digits in our answer. That means that

a = 1.5 m/sec²

Work is done: a) by the gas on the piston.

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For compound microscope:  the objective lens produces a real, inverted image that is then magnified by the eyepiece lens to produce an upright, virtual image.

For simple microscope: The objective lens produces a real, inverted image that is viewed directly by the eye without the need for an eyepiece lens.

For telescope: The objective lens or mirror produces a real, inverted image that is then magnified by the eyepiece lens to produce an upright, virtual image. The eyepiece can be positive or negative depending on the desired magnification.

The following are some signs (positive or negative) of objective and eyepiece lenses in microscopes and telescopes:

Objective lens:

Eyepiece lens:

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The true direction of the jet is approximately 4.8 degrees north of east.

To determine the true direction of the jet, we need to calculate the resultant velocity vector. We can start by representing the velocity of the jet and the wind as vectors using the i and j components.
The velocity vector of the jet is 475i (since it is heading due east) and the velocity vector of the wind is 40j (since it is blowing due north).
To find the resultant vector, we can add these two vectors using vector addition.
Resultant velocity vector = 475i + 40j
To find the direction of this vector, we need to use trigonometry. We can calculate the angle that this vector makes with the east using the arctangent function.
Angle = arctan(40/475)
Angle ≈ 4.8 degrees north of east

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Answer:

Speed describes how far an object moves in a given amount of time (for example, miles per hour).

Explanation:

Answer:

Explanation:

According to ohm's law, V = IR where;

V is the supply voltage (in volts)

I is the current supplied (in amperes)

R is the resistance (in ohms)

Initially, I = 2A, hence V = 2*R;

V = 2R .................... 1

If the resistance in the circuit decreases to one-fourth of its original amount while the voltage remains constant, then the new resistance will be expressed as R₂ = 1/4 R and V₂ = V

Substituting the new conditions into the ohms law formula, we will have;

V₂ = I₂R₂

I₂ is the resulting new current

V = I₂ (1/4 R)

V = I₂ * R/4

V = I₂R/4 ...... 2

Substituting equation 1 into 2 we will have;

2R = I₂R/4

2 = I₂/4

cross multiply

I₂ = 4*2

I₂ = 8A

Hence the resulting new current is 8A

The expression for the pressure of a system of independent bosons and independent fermions is given below

\(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)

Where t is the sum over all states, and the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The negative sign of kT implies that energy tends to decrease as the temperature rises. The summation is bounded, and the square brackets are non-negative, with the upper bound being 1 for bosons and 0 for fermions. Since there are N particles in total, the first term in the bracket is multiplied by N to obtain the total number of particles. Then, the sum is rearranged and simplified as follows:For bosons:

\(KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs\\=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)

For fermions:\(KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)In each case, the sum is bounded and non-negative. As a result, both the expressions have a non-negative value. This implies that pressure is always positive or zero.Since the number of particles is constant, the second term is the chemical potential multiplied by the total number of particles. For bosons, chemical potential is always less than zero, whereas for fermions, chemical potential is always greater than zero. This implies that the bosonic pressure is greater than the fermionic pressure if the number of particles is constant. Hence, P_(B) > P_(F). From the great partition function, the expression for pressure of a system of independent bosons and fermions is given as,

\(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)

where t is the sum over all states, and the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The negative sign of kT implies that energy tends to decrease as the temperature rises. The summation is bounded, and the square brackets are non-negative, with the upper bound being 1 for bosons and 0 for fermions. Since there are N particles in total, the first term in the bracket is multiplied by N to obtain the total number of particles. The expressions can be written as:

For bosons\(:KT NkTP=t Σn[1-exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)For fermions:\(KT NkTP=t Σn[1+exp(-β(ε_n-μ))]Vs=1KT NkT|P|≤Nexp(βμ) Σn exp(-βε_n)V\)In each case, the sum is bounded and non-negative. This implies that pressure is always positive or zero. Since the number of particles is constant, the second term is the chemical potential multiplied by the total number of particles. For bosons, chemical potential is always less than zero, whereas for fermions, chemical potential is always greater than zero. Hence, P_(B) > P_(F)

Thus, we can conclude that for a system of N independent bosons and one of independent fermions, the pressure is given by \(KT NkTP=t Σn[1±exp(β(μ-ε,)]Vs=1\)where the plus sign and minus sign in the brackets correspond to bosons and fermions, respectively. The summation is bounded and non-negative. This implies that pressure is always positive or zero. The bosonic pressure is greater than the fermionic pressure if the number of particles is constant.

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Answer:

natural is the answer

Friction is a natural force which exist

Answer: It keeps them organized

Explanation: ... ew

The correct statement regarding an AC frequency of 50 Hz is that the current changes direction 50 times each second. This means that the flow of electric charge alternates direction at a rate of 50 cycles per second, resulting in a sine wave pattern.

The unit of frequency, hertz, represents the number of cycles per second, so a frequency of 50 Hz means that the current changes direction 50 times in one second. This is the standard frequency used for power distribution in most parts of the world, including Europe and Asia. It is important to note that this frequency determines the rate at which AC devices operate and is a key factor in determining the efficiency and reliability of power systems. In summary, an AC frequency of 50 Hz means that the current changes direction 50 times each second, which is the correct answer to the multiple-choice question.

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Answer:

This is one of  the mysteries  of quantum mechanics - a  single photon in classical mechanics is sent out in a circular arc - but when the arc interacts with a distant object the entire wave front collapses and delivers the entire energy of the photon to the object in question.

An analogy has been give as a pop  bottle thrown into the water in New York with its energy spreading out in a circular arc and at some time later  the wave front strikes a pop bottle in the water in Japan with the result of the wave front delivering its entire energy to the bottle with the bottle jumping out of the water.