Physical science is ____.

When the electron that gains energy during the process of fluorescence then option (B) It returns to its original energy level in the atom.

In the process of fluorescence, an electron in an atom is excited to a higher energy level when it absorbs a photon of light. The excited electron then quickly releases this extra energy by emitting another photon of light and returning to its original, lower energy level. This emitted photon typically has a longer wavelength and lower energy than the absorbed photon, giving rise to the characteristic fluorescence color.

Thus, the electron does not leave the atom, nor does it release a longer wavelength of electromagnetic radiation. It simply returns to its original energy level, and the excess energy is emitted as a photon. The electron does not gain heat and burn, either, as fluorescence does not involve significant heat generation.

Therefore, the correct option is (B) It returns to its original energy level in the atom

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Answer:

Filtration

Explanation:

is a process by which impurities or particles are removed from a fluid, either a liquid or a gas. The liquid, or feed, is poured over a filter, which catches particles and allows filtered liquid, or filtrate, to move through it.

I'm in middle school, and I answered an basic question for you. Come on man, all you have to do is look up the definition.

The velocity of the second piece of the firecracker of mass 5.00kg as a result of explosion is 37.5 m/s.

Velocity can be defined as the rate of change of displacement of a body.

To calculate the velocity of the second piece, we use the formula below.

Formula:

Where:

Make v the subeject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the velocity of the second piece is 37.5 m/s.

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The aliens will notice the rotational motion of planets on their axis and revolution of the planets around the sun (star).

The sun and the planets are roughly in the same plane .

The first motion aliens will notice will be the rotation of the planets on their vertical axis. Each planet have different rotational speed , which results in the formation of day and night on each planet

The second motion they will notice will be the revolution of the planets around the sun(star) and the revolution of the moons of the planets around the planets. The path of revolution of each planet is fixed and is elliptical in shape also known as an orbit . During one single revolution each planet comes near the sun twice. Also the size of the elliptical path of each planet is not the same .

One more special motional observation that they will see , will be the helical motion of the planets as the entire solar system moves at an angle of 60 degree between the galactic plane and the planetary orbital plane

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The correct case clause would be A. Case Is >7.

In a Select Case block, the case clauses are used to check different conditions against a selector value. The selector value is compared with each case clause, and the first matching case clause is executed.

To determine which case clause will be true when the selector value is greater than or equal to 7, we need to consider the available options:

A. Case Is >7: This case clause will be true when the selector value is greater than 7.

B. Case Is = 8: This case clause will be true only when the selector value is exactly 8.

Since we are interested in finding the case clause that matches when the selector value is greater than or equal to 7, option A (Case Is >7) is the correct choice. It covers all values greater than 7, including 8 and any other number greater than 8.

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Using g = 9.8 m/s2, the statement that best describes the roller coaster car when it is at the top of the loop-de-loop is that The car has both potential and kinetic energy, and it is moving at 24.6 m/s. The correct answer is B) The car has both potential and kinetic energy, and it is moving at 24.6 m/s.

Potential energy is the energy that is stored in any object or system as a result of its position or component arrangement. The environment outside of the object or system, such as air or height, has no impact on it. In contrast, kinetic energy refers to the energy of moving particles inside a system or an item.

The energy an individual or an object has as a result of motion in this case, the motion of the falling apple is known as kinetic energy. Potential energy, which exists in a bike that is parked on top of a hill, is converted to kinetic energy when you start riding it downhill. These two energies are both expressed as joules.

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Answer: B (The car has both potential and kinetic energy, and it is moving at 24.6 m/s.)

Explanation:

if the final acceleration increases by a factor of 11, then the final rotation should be 3.32\(w_{1}\) times the initial rotation.

The relation between the centripetal acceleration and rotation speed of the particle is given as

a=rω²    

Where ω  is the angular speed and r radius of the circle

Now, rearranging the above equation we will get

ω = √\(\frac{a}{r}\)

The initial acceleration is given by

           a₁ =100g

But then, the acceleration increases by a factor of 11. Which means the final acceleration of the particle is

a₂ = 11 (100g)

    = 1100g

The final and initial rotation speeds are related as

\(\frac{w1}{w2}\)   = √\(\frac{a2}{a1}\)

\(w_{2}\)  = √\(\frac{1100g}{100g}\) x \(w_{1}\)

\(w_{2}\)  = 3.32 \(w_{1}\)

The final rotation should be 3.32\(w_{1}\) times the initial rotation.

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The example that represents the missing organizational level is B. Heart.

Cells are the smallest unit of life and are the basic structural and functional unit of all living organisms. Tissues are groups of cells that work together to perform a specific function.

Organs are made up of tissues that work together to perform a specific function. This is the missing organization level in the given diagram and an example of an organ is the heart.

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Answers are:

2. 0.163 m CuI2: Second highest boiling point

3. 0.173 m Cr(NO3)2: Third highest boiling point

4. 0.580 m urea (nonelectrolyte): Lowest boiling point

To determine the order of boiling points based on the given solutions, we need to consider the nature of the solute and its effect on boiling point elevation. In general, a higher concentration of solute particles in a solution leads to a higher boiling point compared to a pure solvent.

Using this information, we can rank the solutions in terms of their boiling points:

1. 0.580 m urea (nonelectrolyte) - This solution has the lowest boiling point since urea is a nonelectrolyte, meaning it does not dissociate into ions in solution. Non-electrolytes typically have a negligible effect on boiling point elevation.

2. 0.163 m CuI2 - Copper(I) iodide (CuI2) is an ionic compound. When it dissolves, it dissociates into Cu²⁺ and 2I⁻ ions, resulting in an increased number of solute particles. Therefore, it has the second highest boiling point among the given solutions.

3. 0.173 m Cr(NO3)2 - Chromium(II) nitrate (Cr(NO3)2) is also an ionic compound. It dissociates into Cr²⁺ and 2NO₃⁻ ions in solution, resulting in a higher concentration of solute particles compared to the previous solutions. Thus, it has the third highest boiling point.

2. 0.163 m CuI2: Second highest boiling point

3. 0.173 m Cr(NO3)2: Third highest boiling point

4. 0.580 m urea (nonelectrolyte): Lowest boiling point

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Answer: D

Explanation:

Answer:

you didn't post any triangles. Thus, the question could not be answered.

Answer:

The given triangle is a right triangle.

The length of the hypotenuse is 2.52.5 units.

The given angle is 39\degree39° .

The unknown side xx is adjacent to the given angle.

We can therefore use the cosine function to find xx .

Recall the mnemonics CAH.

This means that;

\cos\theta=\frac{Adjacent}{Hypotenuse}cosθ=

Hypotenuse

Adjacent

This implies that,

\cos39\degree=\frac{x}{2.5}cos39°=

2.5

x

We multiply both sides by 2.52.5 to get,

2.5\cos39\degree=x2.5cos39°=x

x=2.5(0.7771)x=2.5(0.7771)

We evaluate to get

x=1.94x=1.94

Therefore the length xx of the side of the triangle is 1.91.9 units to the nearest tenth.

Answer:

49 millimeters

Explanation:

To determine how much longer the aluminum house siding is on a hot day at 37°C compared to a cold day at -28°C, we can use the coefficient of linear expansion for aluminum.

The coefficient of linear expansion for aluminum is approximately 22.2 x 10^(-6) per degree Celsius. This means that for every 1°C increase in temperature, aluminum expands by 22.2 x 10^(-6) times its original length.

First, we need to calculate the temperature difference between the hot day and the cold day:

Temperature difference = Hot temperature - Cold temperature

Temperature difference = 37°C - (-28°C)

Temperature difference = 37°C + 28°C

Temperature difference = 65°C

Next, we can calculate the increase in length using the coefficient of linear expansion:

Increase in length = Coefficient of linear expansion * Original length * Temperature difference

Increase in length = 22.2 x 10^(-6) * 3.40 m * 65°C

Increase in length ≈ 0.049 m

Therefore, the aluminum house siding would be approximately 0.049 meters (or 49 millimeters) longer on a very hot day at 37°C compared to a cold day at -28°C.

The magnitude of the initial momentum is 0 m/s and the magnitude of the final momentum is 37.500 m/s.

m = mass of Porsche and Ed = 1,200 kg + 50 kg = 1,250 kg.

v = velocity of Porsche = 30 m/s.

The magnitude of the momentum can be calculated by this formula,

momentum (p) = mass (m) * velocity (v)

The magnitude of initial momentum is always 0 because when the body starts moving the velocity is zero and when velocity is zero the momentum is zero. So, the magnitude of initial momentum is 0 m/s.

For the magnitude of the final momentum is,

p = m * v (when collides with the wall)

= 1,250 * 30

= 37,500 m/s

Thus, the initial momentum is 0 m/s and the final momentum is 37,500 m/s.

Your question is incomplete, but most probably your full question was

(image attached)

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Answer:

The correct answer is - 200000 J

Explanation:

We use the formula of kinetic energy:

The formula to calculate kinetic energy is,

Here,

Ec =1/2 x  m x v^2

The mass of the roller coaster is,  m  =  1000  k g

The speed of the roller coaster is, v = 20.0 m/s

 Therefore,

Ec=1/2 x 1000kg x (20m/s)^2 = 200.000Joule

200,000J

The mean lifetime of A is given by τ(A) = 26 × 10⁻¹⁰ s. The A decays into p + e⁻ + ve with a branching fraction of BR(A → p + e⁻ + ve) = 83 × 10⁻⁴.The mean lifetime of A⁺ (udc) is given by τ(A⁺) = 2-1 × 10⁻¹³ s.

The branching fraction of A into A⁺ + e⁺ + ve is given as follows: First, we can calculate the decay constant for A.λ = (1/τ) = (1/26 × 10⁻¹⁰) s⁻¹.The half-life of A is given by t₁/₂ = ln(2) / λ = (ln2 × τ) = 2.667 × 10⁻¹⁰ s. The branching fraction of A → A⁺ + e⁺ + ve is given as follows: BR(A → A⁺ + e⁺ + ve) = 1 - BR(A → p + e⁻ + ve) = 1 - (83 × 10⁻⁴) = 0.99917.

The measured value of the branching fraction of A → A⁺ + e⁺ + ve is BR(e+ve) = 2106 %.This is greater than 100%. Therefore, the value must be a typographical error. The correct percentage is probably 21.06%.The estimated branching fraction of A → A⁺ + e⁺ + ve is 99.917%, which is very close to 100%. This implies that the A mainly decays into A⁺ + e⁺ + ve.

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Answer: In a battery, voltage determines how strongly electrons are pushed through a circuit, much like pressure determines how strongly water is pushed through a hose. Most AAA, AA, C, and D batteries are around 1.5 volts. Imagine the batteries shown in the diagram are rated at 1.5 volts and 500 milliamp-hours.

Explanation: Today "AA" is frequently used as a size designation, irrespective of the battery's electrochemical system. The main numbers used for the most common NiMH and NiCad battery

To produce a voltage of 1.5 V with a Voltaic pile, we would need either two zinc pennies and one copper nickel or one zinc penny and three copper nickels.

A Voltaic pile is an early type of battery that consists of alternating discs of two different metals (such as copper and zinc) separated by cardboard soaked in an electrolyte solution. Each pair of metal discs and cardboard makes up one cell of the battery, and the voltage of the battery depends on the number of cells connected in series.

To calculate how many pennies and nickels would be needed to produce a voltage of 1.5 V, we need to consider the voltage generated by each cell and the number of cells required to achieve a total voltage of 1.5 V.

One zinc penny produces approximately 1.1 volts, and one copper nickel produces approximately 0.5 volts. To get a total voltage of 1.5 V, we could arrange one zinc penny and one copper nickel in series, but this combination would produce a voltage of only 1.6 V (1.1 V + 0.5 V).

To get as close to 1.5 V as possible, we could use two zinc pennies and one copper nickel in series, which would produce a voltage of 1.7 V (1.1 V + 0.6 V).

Alternatively, we could use one zinc penny and three copper nickels in series, which would also produce a voltage of 1.5 V (1.1 V + 0.4 V + 0.5 V + 0.5 V).

Therefore, To produce a voltage of 1.5 V with a Voltaic pile, we need either two zinc pennies and one copper nickel or one zinc penny and three copper nickels.

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Answer:

The correct option is;

d) Parallel to the plane

Explanation:

The forces acting on the box of mass, m are;

Weight of the box acting an angle, θ, equal to the inclination of the plane to the perpendicular of the plane

Weight of the box acting along the plane = m×g×sin(θ)

The force of friction along the plane = μ×m×g×cos(θ)

The total force acting downward along the plane \(F_{down}\), = m×g×sin(θ) + μ×m×g×cos(θ)

The Force needed to pull the box up along the plane F = The total force acting downward along the plane

F = m×g×sin(θ) + μ×m×g×cos(θ) = m×g×(sin(θ) + μ×cos(θ))

When the force, Fₐ is applied vertically, the force acting along the plane = Fₐ×cos(θ)

When the force is applied perpendicular, the force acting along the plane = Fₐ×sin(θ)

When the force is applied horizontally, the force acting along the plane = Fₐ×cos(θ)

When the force is applied parallel to the plane, the force acting along the plane = Fₐ

Therefore, since Fₐ > Fₐ×cos(θ) and Fₐ > Fₐ×sin(θ), for acute angles, we have that the least force is required when the force is acting parallel to the plane.

Formula for work:

\(w=Fd\)

work(measured in joules) = force(measured in newtons) * distance(measured in meters)

__________________________________________________________

Given:

\(d=10m\)

\(F=200N\)

\(w=?\)

__________________________________________________________

Finding work:

\(w=Fd\)

\(w=200\times10\)

__________________________________________________________

Answer:

\(\fbox{w = 2000 Joules}\)

The net effect of the sodium-potassium pump is to create a transmembrane electrical potential.

Sodium-potassium pump is a process in which sodium ions (Na+) are transported out of the cell while potassium ions (K+) are transported into the cell. The net effect of this process is that there is a greater concentration of K+ ions inside the cell and a greater concentration of Na+ ions outside the cell.

This creates an electrochemical gradient across the cell membrane. This gradient is what allows cells to carry out a variety of functions such as transmitting signals and carrying out metabolic processes. The electrochemical gradient is also what drives the movement of other molecules across the cell membrane.

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Answer:

Explanation:

The kinetic energy (KE) of an object given it's mass and velocity can be found by using the formula

\(KE = \frac{1}{2} m {v}^{2} \)

where

m is the mass of the object

v is the velocity

From the question

m = 0.38 kg

v = 120 m/s

We have

\(KE = \frac{1}{2} \times 0.38 \times {120}^{2} \\ = \frac{1}{2} \times 0.38 \times 14400 \\ = 0.38 \times 7200\)

We have the final answer as

Hope this helps you

Answer:

Vf = 11.04 m/s

Explanation:

First, we consider free fall motion with zero initial velocity. Using 2nd equation of motion:

h = Vi t + (1/2)gt²

where,

h = height of bridge = ?

Vi = Initial  Speed  = 0 m/s

t = time taken = 4.5 s

g = 9.8 m/s²

Therefore,

h = (0 m/s)(4.5 s) + (1/2)(9.8 m/s²)(4.5 s)²

Therefore,

h = 99.225 m

Now, we consider the forced motion when the youth throws the ball with some negative initial energy:

Vi = - Vi

t = 3 s

h = 99.225 m

Therefore,

99.225 m = - Vi(3 s) + (1/2)(9.8 m/s²)(3 s)²

Vi = (- 99.225 m + 44.145 m)/3 s

Vi = - 18.36 m/s

Now, we use this in 1st equation of motion for final velocity:

Vf = Vi + gt

Vf = -18.36 m/s + (9.8 m/s²)(3 s)

Therefore,

Vf = 11.04 m/s

The amount of solar energy received at a location is affected by various factors, including latitude and cloud cover. Locations closer to the equator receive more solar energy compared to those closer to the poles, and areas with frequent cloud cover receive less solar energy compared to areas with clear skies.

There are various factors that can affect the amount of solar energy a location receives. Two such factors are:

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Answer:the answer is B

Explanation:

APE X

The technology that is based on the work of Subrahmanyan Chandrasekhar is an orbiting observatory to detect X-rays from space objects, therefore the correct option is B.

Chandrasekhar's limit is a type of maximum limited value that is used to define the maximum mass of a white dwarf star. The generally internationally considered value of the Chandrasekhar limit is about 1.44 times the mass of the sun which is approximately 2.765×10³⁰ kg.

In other words, one can say that Chandrasekhar limit is the maximum value that can attain 1.44 times the solar mass.

In other words, one can say that star with a mass more than 1.44 times that of the Sun does not form a white dwarf but  continues to collapse, finally forming a neutron star

An orbiting observatory to detect X-rays from space objects is based on the principle of Chandrasekhar's limit. The correct option is B.

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Answer:

D

Explanation: need good posture other wise will injury yourself during activity

Answer:

i think it is 45 kilograms not really sure?

Explanation:it might be wrong but i think it is right

Answer:

1500 meters

Explanation:

Answer:1500 Metres

Explanation:

1 KM = to 1000 M

Answer:

Explanation:

Let mass of cart be m₁ and m₂

m₁ + m₂ = 1.5 kg

At the time of release , their momentum will be conserved

m₁ v ₁ = m₂ v₂

m₁ v ₁ = (1.5 - m₁ ) x 2 v₁

m₁ = 3 - 2m₁

3m₁ = 3

m₁ = 1 kg

m₂ = .5 kg

The gas pressure will decrease.

According to the Ideal Gas Law, PV=nRT, where P is the pressure, V is the volume, n is the number of molecules, R is the gas constant, and T is the temperature in Kelvin. When the volume and the number of molecules are constant, the pressure of a gas is directly proportional to the temperature.

This means that if the temperature decreases, the gas pressure will also decrease. So, in your case, a decrease in temperature would cause a decrease in gas pressure, assuming that there is a constant volume and a constant number of molecules.

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Answer:

Point 3

Explanation:

It is a summer month position but it has no sunlight.

Based on the sunlight model, the point which is experiencing nighttime during the summer month is: C. point 3.

Earth rotation can be defined as the amount of time that it takes planet Earth to complete its spinning movement about an orbital axis.

This ultimately implies that, Earth rotation refers to the amount of time taken by Earth to rotate once on its axis. Also, a spinning movement of the Earth on its axis takes approximately 24 hours to complete with respect to the Sun and as such it result in different periods being experienced such as daytime and nighttime.

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