how much time is required for a bicycle to travel a distance of 100 m at an avreage speed

The production and propagation of sound waves allows us to comprehend how sound is created, transmitted, and perceived in our everyday lives, influencing fields such as acoustics, communication, and music.

The production and propagation of sound waves involve various principles and concepts related to vibrations, wave mechanics, and the interaction of sound with the surrounding medium. Let's analyze each aspect in detail:

Production of Sound Waves:

Sound waves are generated by the vibration of an object or a disturbance in a medium. The production of sound typically involves three essential components:

a. Source of Vibration: Any object capable of vibrating can act as a source of sound waves. For example, when a guitar string is plucked or a drum is struck, they vibrate and create sound waves.

b. Medium: Sound requires a medium to travel through. It can be a solid, liquid, or gas. In each case, the particles of the medium are set into vibration by the source, and these vibrations are transmitted as sound waves.

c. Vibrations and Compression: The vibrating source creates a series of compressions and rarefactions in the medium. When the object moves forward, it compresses the adjacent particles, causing a compression or high-pressure region.
As it moves backward, it creates a rarefaction or low-pressure region. These alternating compressions and rarefactions form a sound wave.

Propagation of Sound Waves:

Once the sound waves are produced, they propagate or travel through the medium. The propagation of sound waves can be explained using the following principles:

a. Wave Nature: Sound waves are mechanical waves that propagate through the sequential motion of particles in the medium. They are composed of compressions (regions of high pressure) and rarefactions (regions of low pressure).

b. Speed of Sound: The speed at which sound waves travel depends on the properties of the medium. In general, sound travels faster in solids, slower in liquids, and even slower in gases. For example, sound travels at approximately 343 meters per second in dry air at room temperature.

c. Reflection: Sound waves can undergo reflection when they encounter a boundary between two different media. Reflection occurs when sound waves bounce back upon striking the boundary, following the law of reflection. This phenomenon allows us to hear echoes and is utilized in various applications such as sonar and ultrasound imaging.

d. Refraction: Refraction refers to the bending of sound waves as they pass from one medium to another with different properties. The change in the speed and direction of sound waves occurs due to the change in the density or temperature of the medium.
This phenomenon is commonly observed when sound travels through air layers of different temperatures, causing sound to bend upward or downward.

e. Diffraction: Sound waves can also exhibit diffraction, which refers to their ability to bend around obstacles or spread out when passing through openings.
The extent of diffraction depends on the wavelength of the sound wave relative to the size of the obstacle or opening. For example, low-frequency sounds can diffract more easily than high-frequency sounds.

f. Absorption and Attenuation: Sound waves gradually lose energy as they propagate through a medium due to various factors like absorption and scattering.
The medium's properties, such as its composition and temperature, can influence the amount of energy absorbed by the medium, resulting in the attenuation (weakening) of the sound wave.
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The probable question may be:

Analyze the production and propagation of sound waves.

Answer:

Hokkaido, Japan

Explanation:

earth quakes are natural there

1. The electric field pattern due to charged sphere A can be represented by lines radiating outward from the sphere.

2. The magnitude of the charge on sphere A is approximately 0.0833 Coulombs.

3. The electrostatic force experienced by sphere B when placed at point P is approximately 2.675 x 10^-4 Newtons.

1. These lines should be evenly spaced and symmetric around the sphere, indicating a radial field pattern. Since the electric field at point P is directed towards sphere A, the field lines should point inward towards the sphere. Thus, the electric field pattern would resemble a series of concentric circles with lines converging towards the center of sphere A.

2. To calculate the magnitude of the charge on sphere A, we can use the formula for the electric field strength (E) due to a point charge:

E = k * (Q / r^2)

where k is the electrostatic constant (approximately 9 x 10^9 N m^2/C^2), Q is the charge on the sphere, and r is the distance from the sphere to the point P.

From the given information, we have E = 3 x 10^7 N/C and r = 0.5 m. Plugging these values into the formula and solving for Q:

3 x 10^7 N/C = (9 x 10^9 N m^2/C^2) * (Q / (0.5 m)^2)

Simplifying the equation, we find:

Q = (3 x 10^7 N/C) * (0.5 m)^2 / (9 x 10^9 N m^2/C^2)

Q ≈ 0.0833 C (Coulombs)

Therefore, the magnitude of the charge on sphere A is approximately 0.0833 Coulombs.

3. When sphere E, which has an excess of 105 electrons, is placed at point P, it will experience an electrostatic force due to the interaction with sphere A. The electrostatic force between two charges can be calculated using Coulomb's law:

F = k * (|q1| * |q2|) / r^2

where k is the electrostatic constant, q1 and q2 are the charges on the spheres, and r is the distance between them.

Since each electron carries a charge of approximately -1.6 x 10^-19 C, the excess charge on sphere E is:

q2 = 105 electrons * (-1.6 x 10^-19 C/electron)

Plugging in the values and the given distance of 0.5 m, we have:

F = (9 x 10^9 N m^2/C^2) * (|0.0833 C| * |-1.6 x 10^-19 C|) / (0.5 m)^2

Simplifying the equation, we find:

F ≈ 2.675 x 10^-4 N (Newtons)

Therefore, the electrostatic force experienced by sphere E when placed at point P is approximately 2.675 x 10^-4 Newtons.

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The tension on the rope at the end where the painter is standing is 294 N, and the tension on the other rope is 196 N.

To find the tensions on the ropes, we can analyze the forces acting on the painter and the plank.

Considering the equilibrium of the system, the sum of the forces acting vertically must be zero. The weight of the painter acts downward with a force of 50 kg * 9.8 m/s^2 (acceleration due to gravity), which equals 490 N.

Let's denote the tension in the rope at the end where the painter is standing as T1 and the tension in the other rope as T2.

Since the plank is at equilibrium, the total upward force must be equal to the total downward force. At the end where the painter is standing, there are two forces acting upward: T1 and T2. Since the painter is 2 m away from this end, the plank experiences a torque due to the weight of the painter.

To calculate the torque, we use the formula: Torque = Force * Distance. The torque due to the painter is (490 N) * (2 m) = 980 Nm.

Since the plank is in equilibrium, the torques acting on it must balance. The torque due to T1 is 0 Nm (as it acts at the pivot point), and the torque due to T2 is (T2) * (5 m) = 5T2 Nm.

Therefore, 5T2 - 980 Nm = 0, which gives T2 = 196 N.

Now, to find T1, we can use the equation: T1 + T2 = Total vertical force. Thus, T1 + 196 N = 490 N, which gives T1 = 294 N.

Therefore, the tension on the rope at the end where the painter is standing is 294 N, and the tension on the other rope is 196 N.

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Hello!

20c = 0.2€

number coins = 2.6/0.2 = 13

1 coin => 6g

13 coins => 6g x 13 = 78g

The answer is 78 grams.

The acceleration of the body is 4.5 m/s^2.

First, let's convert the initial velocity and final velocity from m/s to km/h:

Initial velocity = 30 m/s = (30/1000) * 3600 = 108 km/h

Final velocity = 80 m/s = (80/1000) * 3600 = 288 km/h

Let the time taken to accelerate to 288 km/h be t1, and the time taken to decelerate from 288 km/h to rest be t2. Since the time spent at constant velocity is twice the time spent accelerating, it is 2t1.

The distance covered during acceleration and deceleration can be calculated using the formula:

distance = (initial velocity * time) + (0.5 * acceleration * time^2)

For acceleration:

distance1 = (108 * t1) + (0.5 * a * t1^2)

For deceleration:

distance2 = (288 * t2) + (0.5 * (-a) * t2^2)

Since the total time taken for the journey is 40, we have:

t1 + 2t1 + t2 = 40

3t1 + t2 = 40

Also, the total distance traveled is given as 2550 km:

distance1 + distance2 = 2550

Substituting the expressions for distance1 and distance2, we get:

(108 * t1) + (0.5 * a * t1^2) + (288 * t2) - (0.5 * a * t2^2) = 2550

Simplifying the above equation:

108t1 + 144t1^2/a + 288t2 - 0.5t2^2a = 2550

Now, we have three equations with three variables (a, t1, t2). We can solve these equations to obtain the value of acceleration (a).

From the first equation, we have:

t2 = 40 - 3t1

Substituting this value of t2 in the equation for distance2, we get:

distance2 = 288(40 - 3t1) - 0.5*a(40 - 3t1)^2

Substituting the values of distance1 and distance2 in the equation for total distance, we get:

(108 * t1) + (0.5 * a * t1^2) + 288(40 - 3t1) - 0.5*a(40 - 3t1)^2 = 2550

Simplifying the above equation and solving for a, we get:

a = 4.5 m/s^2
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We can see here that if the conductor in item 27 is replaced by a magnet with a downward magnetic field, the effect on the electron stream would depend on the specific circumstances and configuration.

A magnetic field is an area of space where magnetic forces are applied to moving electric charges, charged particles, or magnetic objects. It is produced by the alignment of magnetic domains in magnetic materials or by the migration of electric charges, such as electrons, within atoms.

In general, electromagnetic induction can cause an electric current to flow through a conductor when a magnet with a magnetic field is introduced close to it. This indicates that the magnetic field might have an impact on how the electrons in the conductor move.

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The time taken for the body to stop is 20 seconds.

The time taken for the body to stop is calculated by applying Newton's second law of motion as follows;

F = ma

where;

acceleration of an object is the change in velocity with change in time of motion;

a = ( v - u )/t

where;

F = m(v - u )/t

t = m(v - u )/F

t = 20(10 - 0)/10

t = (20 x 10)/10

t = 20 seconds

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The diameter of the planet would need to be approximately twice this value 33,600 km assuming it has a uniform density.

Using the formula F' = G * (m1 * m2') / r²

F' = G * (m₁ * m₂') / r² = 100 lbs

G * (150 lbs * 3 * m_Earth) / r² = 100 lbs

r² = (G * 450 * m_Earth) / (100 lbs)

r² = 4.5 * G * m_Earth

r = ✓(4.5 * G * m_Earth)

Using the value for G and the mass of the Earth, we get:

r = ✓(4.5 * 6.6743 x 10⁻¹¹ m³ / kg s² * 5.9722 x 10²⁴ kg)

r = 1.68 x 10⁷ meters

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The value of R3 that will result in a potential difference of 50V across the light bulbs is 2Ω.

Ohm's law is a fundamental principle in electrical engineering that states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to its resistance. Mathematically, Ohm's law is expressed as I = V/R, where I is the current, V is the voltage, and R is the resistance of the conductor.

To determine the value of R3 that will result in a potential difference of 50V across the light bulbs, we need to use the principles of Kirchhoff's laws and Ohm's law.

First, let's apply Kirchhoff's voltage law (KVL) to the circuit. Starting at the positive terminal of the voltage source, and moving in a clockwise direction, we can write:

V - I1R1 - I2R2 - I3*R3 = 0

where V is the voltage of the source, R1 and R2 are the resistances of the two fixed resistors, I1 and I2 are the currents flowing through R1 and R2 respectively, and I3 is the current flowing through R3.

Next, let's apply Ohm's law to the circuit. The current flowing through each of the resistors is given by:

I = V / R

where V is the potential difference across the resistor, and R is its resistance.

For the light bulbs, we know that the potential difference across each bulb is 50V, so we can write:

I1 = 50V / R1

I2 = 50V / R2

I3 = 50V / R3

Substituting these expressions for the currents into the KVL equation, we get:

V - (50V/R1)*R1 - (50V/R2)*R2 - (50V/R3)*R3 = 0

Simplifying, we get:

V - 50V - 50V - (50V/R3)*R3 = 0

Rearranging, we get:

(50V/R3)*R3 = V - 100V

Multiplying both sides by R3, we get:

(50V)R3 = R3(V - 100V)

Simplifying, we get:

R3 = (V - 100V) / 50V

Substituting the given value of the potential difference, V = 200V, we get:

R3 = (200V - 100V) / 50V = 2Ω

Therefore, the value of R3 that will result in a potential difference of 50V across the light bulbs is 2Ω.

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To obtain the type, orientation, location and magnification of the image, we shall first obtain the location (i.e distance) of the image from the mirror. Details below:

The location i.e distance of the image can be obtained as follow:

1/f = 1/v + 1/u

Rearrange

1/v = 1/f - 1/u

v = (f × u) / (u - f)

v = (12 × 24) / (24 - 12)

v = 288 / 12

v = 24 cm

Thus, the the location of the image is 24 cm

Since the location of the image is positive (i.e 24 cm). Thus,

Now, we shall obtain the magnification of the image. Details below:

Magnification = image distance (v) / object distance (u)

Magnification = 24 / 24

Magnification = 1

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The car needs to slow down to a minimum velocity before the collision, which is  0.789 meters per second (m/s), to avoid a fatal crash., and the mass of water needed in the barrels to bring the 1200 kg car down to the required speed is 42,344.1 kg.

To determine the minimum velocity the car can slow down to during a collision without the crash being fatal, we need to consider the concept of deceleration and the forces involved.

Deceleration and Minimum Velocity:

Let's assume the car slows down uniformly with a deceleration, denoted as 'a', until it comes to a stop. We can use the equation of motion to relate the initial velocity (100 km/h) with the final velocity (0 m/s), deceleration (a), and the distance traveled (unknown in this case).

The equation of motion is:

v^2 = u^2 + 2as

where:

v = final velocity (0 m/s)

u = initial velocity (100 km/h or approximately 27.78 m/s)

a = deceleration

s = distance traveled

Substituting the values into the equation, we have:

0^2 = (27.78)^2 + 2a(s)

Simplifying, we get:

0 = 771.84 + 2as

Since the car comes to a stop, the final velocity is 0, and we're left with:

771.84 = 2as

Now, we need to consider the impact force experienced by the car during the collision. This force is related to the deceleration and the mass of the car by Newton's second law of motion:

F = ma

We want to find the minimum velocity at which the crash won't be fatal, so we need to determine the maximum acceptable force the car can withstand without causing severe harm.

The maximum acceptable force depends on various factors, including the design and safety features of the car, but let's assume a commonly used threshold of 50 g's (where g is the acceleration due to gravity, approximately 9.8 m/s^2).

Converting 50 g's to m/s^2, we have:

50 g's * 9.8 m/s^2 = 490 m/s^2

Thus, we want to limit the deceleration to 490 m/s^2.

Now we can rearrange the equation 771.84 = 2as to solve for 's' (the distance traveled):

s = 771.84 / (2a)

Substituting the maximum acceptable deceleration (490 m/s^2) into the equation:

s = 771.84 / (2 * 490)

s ≈ 0.789 m

Therefore, the car needs to slow down to a minimum velocity before collision, which is approximately 0.789 meters per second (m/s), to avoid a fatal crash.

Mass of Water in Barrels:

To calculate the mass of water needed in the barrels to bring the 1200 kg car down to the required speed, we need to consider the conservation of momentum.

The initial momentum of the car is given by:

initial momentum = mass of the car * initial velocity

The final momentum of the car-barrels system is given by:

final momentum = mass of the car-barrels system * final velocity

Since the car forms a combined moving unit with the barrels after the collision, their final velocity will be the same. We can equate the initial and final momentum to find the mass of the car-barrels system.

initial momentum = final momentum

mass of the car * initial velocity = mass of the car-barrels system * final velocity

Solving for the mass of the car-barrels system:

mass of the car-barrels system = (mass of the car * initial velocity) / final velocity

Substituting the given values:

mass of the car-barrels system = (1200 kg * 27.78 m/s) / 0.789 m/s

mass of the car-barrels system ≈ 42344.1 kg

To bring the car-barrels system to a stop, an equal and opposite force needs to act on it. In this case, we assume the force is provided by the water in the barrels.

The force required to decelerate the car-barrels system is given by:

force = mass of the car-barrels system * deceleration

We can use this force to calculate the mass of water needed in the barrels. Let's assume the deceleration required is the maximum acceptable deceleration we determined earlier (490 m/s^2).

mass of water = force / deceleration

mass of water = (mass of the car-barrels system * deceleration) / deceleration

mass of water = mass of the car-barrels system

So, the mass of water needed in the barrels to bring the 1200 kg car down to the required speed is approximately 42,344.1 kg.

Hence, To avoid a fatal collision, the car must slow down to a minimum velocity of 0.789 metres per second (m/s) before the collision, and the mass of water required in the barrels to bring the 1200 kg car down to the required speed is 42,344.1 kg.

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Answer:

Alternating current

Explanation:

We know that electric current is defined as the electric charge divided by time.

There are two types of current i.e. direct current (D.C) and alternating current (A.C)

Direct current: The flow of electric charge in one direction is called as direct current. It was produced firstly by Alessandro Volta in 1800. One of the examples of direct current is the battery.

Alternating current: The flow of electric charges that reverses the direction periodically is known as alternating current.

Conduction and Convection is the two ways by which heat energy can be transmitted.

Heat energy can be transferred by the following ways-

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The wave function for a particle in a box of length 3.3 a.u. is given by:

ψ(x) = Asin((nπx)/3.3)

where n is an integer corresponding to the quantum number of the particle and A is a normalization constant.

To find the value of A, we need to normalize the wave function so that the total probability of finding the particle in the box is equal to 1.

The probability of finding the particle between two points x1 and x2 is given by:

P = ∫x1x2 |ψ(x)|^2 dx

In the case of a particle in a one-dimensional box, the probability density |ψ(x)|^2 is given by:

|ψ(x)|^2 = A^2sin^2((nπx)/3.3)

To normalize the wave function, we need to ensure that:

∫0^3.3 |ψ(x)|^2 dx = 1

Using the identity ∫0π sin^2(u) du = π/2, we get:

1 = A^2 ∫0^3.3 sin^2((nπx)/3.3) dx = A^2 [3.3/2 - (1/(2nπ))sin((2nπ)/3.3)]

Solving for A, we get:

A = sqrt(2/(3.3 - (1/(nπ))sin((2nπ)/3.3)))

Therefore, the final expression for the wave function is:

ψ(x) = sqrt(2/(3.3 - (1/(nπ))sin((2nπ)/3.3))) * sin((nπx)/3.3)

where n is an integer corresponding to the quantum number of the particle.

The maximum angle at which an object will not slip on an incline can be calculated using the coefficient of friction (μ).

When an object is on an inclined plane, there are two main forces acting on it: the gravitational force pulling it downward (mg) and the normal force (N) exerted by the inclined plane perpendicular to its surface. Additionally, there is a frictional force (F) acting parallel to the surface of the incline.

To prevent slipping, the frictional force must be equal to or greater than the force component pulling the object down the incline. This force component is given by the equation F = mg sin(θ), where θ is the angle of inclination.

The maximum frictional force that can be exerted between two surfaces is given by the equation F = μN, where μ is the coefficient of friction.

For an object not to slip, the maximum frictional force (F) must be equal to or greater than the force component pulling the object down the incline (mg sin(θ)). Therefore, we have:

F ≥ mg sin(θ)

Substituting F = μN, we get:

μN ≥ mg sin(θ)

Since N = mg cos(θ) (the normal force is equal to the component of the gravitational force perpendicular to the incline):

μmg cos(θ) ≥ mg sin(θ)

μ cos(θ) ≥ sin(θ)

Now, divide both sides of the equation by cos(θ):

μ ≥ tan(θ)

Taking the inverse tangent (arctan) of both sides, we get:

θ ≤ arctan(μ)

Therefore, the maximum angle at which an object will not slip on an incline is given by θ = arctan(μ).

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The final temperature of the mixture formed by adding the water is most likely 30°.

The rule of conservation of energy is demonstrated by the calorimetric principle, which states that the total amount of heat lost by a hot body is equal to the total amount of heat acquired by a cool body.

Heat lost = Heat gain

50 x 4.18 x (T - 10) = 50 x 4.18 x (80 - T)

T - 10 = (80 - T)

T - 10 = 80 - 2T

3T = 90

Therefore, the final temperature of the mixture,

T = 90/3

T = 30°

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The statement is true. A stanza, also known as a verse, of 12-bar blues usually consists of four phrases, each phrase consisting of three bars (measures) of music. The 12-bar blues is a standard chord progression commonly used in blues music, and it typically follows an AAB lyrical pattern where the first and second phrases are identical and the third phrase provides a contrasting resolution. The fourth phrase is often used as a turnaround, leading back to the beginning of the progression for the next stanza. This structure creates a cyclical and repetitive form that is characteristic of the blues genre.

From the darkest part of the object's shadow, you would be able to see a small amount of the light source. There would be a small amount of light that is visible, but it would be faint. On the other hand, from the lightest part of the shadow, you would be able to see much more of the light source. The light source would be far brighter and more visible, and you would be able to identify the source of the light.

Answer: B. DLC

B. Visual Updates

B. Competition and expectations

D. Every three months

D. Game expansion packs

C. Visual updates

A. Game expansion

C. Concept art books

A. Create DLC

A. Check licensing agreements

D. Separate her personal finances from the business finances

B. Soundtrack

C. Group dynamics

C. To open a business bank account

B. Onboarding activities

Explanation: :)

it is a form of mechanical energy, this is not a characteristic of electrical potential energy. Hence option A is correct.

Electrical potential energy is the energy that is held in a system of charges as a result of their arrangements or positions. It is connected to a charge in an electric field and results from the interaction of charges.

The relative locations of the charges and how they interact with the electric field determine the potential energy. Electrical potential energy is not regarded as a type of mechanical energy, though. The energy connected to the motion or location of an object is referred to as mechanical energy.

Both kinetic energy (energy of motion) and potential energy (energy resulting from position or configuration) are included in it; however, electrical potential energy belongs to the potential energy category rather than the mechanical energy category.

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Explanation:

(a) Let's use the law of conservation of mechanical energy to determine the speed with which the other end of the rod hits the floor. When the rod is released, it begins to rotate around its center of gravity and falls to the floor. At the moment of release, the rod has no kinetic energy or potential energy, but it has potential energy when it reaches the floor. The energy is conserved, so we can equate the initial potential energy to the final kinetic energy.

The initial potential energy of the rod is given by:

U_i = mgh

where m is the mass of the rod, g is the acceleration due to gravity, and h is the height of the center of gravity above the floor. Since the rod is vertical, h = L/2. The mass of the rod can be calculated using its density ρ and cross-sectional area A:

m = ρAL

The final kinetic energy of the rod is given by:

K_f = (1/2)Iω^2 + (1/2)mv^2

where I is the moment of inertia of the rod with respect to its center of gravity, ω is the angular velocity of the rod, and v is the linear velocity of the center of gravity. At the moment when the rod hits the floor, the angular velocity is zero, so the first term in the above equation is zero. We can simplify the equation to:

K_f = (1/2)mv^2

We can equate the initial potential energy and final kinetic energy to get:

mgh = (1/2)mv^2

Solving for v, we get:

v = sqrt(2gh)

Substituting the given values, we get:

v = sqrt(2gL/2) = sqrt(gL/2)

Now, we can substitute the values of g and L to get:

v = sqrt(9.81 m/s^2 x 1 m/2) = sqrt(4.905) m/s

Therefore, the other end of the rod hits the floor with a speed of approximately 2.216 m/s.

(b) If the length of the rod were 100 m instead of 1 m, the speed with which the end hits the floor would increase significantly. The potential energy of the rod when it is released is proportional to its height above the floor, so when the length of the rod is increased by a factor of 100, the potential energy increases by a factor of 100 as well. Therefore, the final speed of the end hitting the floor would be:

v' = sqrt(2gh') = sqrt(2g(100L)/2) = sqrt(100gL/2) = 10sqrt(gL/2)

Substituting the given values, we get:

v' = 10sqrt(9.81 m/s^2 x 100 m/2) = 10sqrt(490.5) m/s

Therefore, the end of the 100 m tall object would hit the floor with a speed of approximately 70.0 m/s, which is a significant increase compared to the initial speed of the 1 m rod.

The energy level from which is emitted is n = 6

The frequency is[tex]7.3 * 10^14[/tex] Hz

The Rydberg equation is a mathematical formula that relates the wavelengths of light emitted by an atom to the energy levels of its electrons.

Using the Rydberg equation;

1/λ= RH (1/[tex]n_{2}^2[/tex] - 1/[tex]n_{1} ^2[/tex])

1/[tex]410.2 * 10^-9[/tex] = [tex]1.097 * 10^7[/tex](1/[tex]2^2[/tex] - 1/  /[tex]n_{1} ^2[/tex])

1/[tex]4.102 * 10^-7[/tex] = [tex]1.097 * 10^7[/tex](1/4 - 1/[tex]n_{1} ^2[/tex])

1/[tex]4.102 * 10^-7[/tex] * 1/ [tex]1.097 * 10^7[/tex] = (1/4 - 1/[tex]n_{1} ^2[/tex])

0.22 = 0.25 -  1/[tex]n_{1} ^2[/tex]

0.22 - 0.25 = -  1/[tex]n_{1} ^2[/tex]

-0.03 = -  1//[tex]n_{1} ^2[/tex]

[tex]n_{1}[/tex] = 6

Using;

f = c/λ

[tex]3 * 10^8/4.102 * 10^-7 \\f = 7.3 * 10^14 Hz[/tex]

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To determine which fridge is more cost-effective, we need to calculate the total cost over the 5-year period for each option.For SuperCool Fridge:Total energy used = 780 W × 24 hours/day × 365 days/year × 5 years / 1000 = 341,640 kWh

Total cost of electricity = 341,640 kWh × $0.134/kWh = $45,817.76

Total cost of fridge over 5 years = $650 + $45,817.76 = $46,467.76For Ice Cold Fridge:Total energy used = 675 W × 24 hours/day × 365 days/year × 5 years / 1000 = 296,100 kWh

Total cost of electricity = 296,100 kWh × $0.134/kWh = $39,704.40

Total cost of fridge over 5 years = $700 + $39,704.40 = $40,404.40Therefore, the Ice Cold Fridge is the more cost-effective option over 5 years, even though it has a lower power rating.

The numbers of people that lost their jobs when the minimum wage increased from $12 to $18 is option A. 15

Determining the effect that an increase in minimum wage will have on employment is a multifaceted matter influenced by several factors including the state of the economy, the industry in question, as well as the dynamics of the labor market.

Raising the minimum wage has the potential to result in a variety of consequences.

From the graph, you can see that:

18 people worked at $12

33 people worked at  18

Hence: 33- 18

= 15

Therefore, option is correct.

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The gauge pressure at a depth of 80 cm in oil with specific gravity 0.8 is 6.2784 kPa.

The gauge pressure at a depth in a fluid can be found using the formula, P = ρgh, where gauge pressure is P, density of the fluid is ρ, acceleration due to gravity is g, and depth of the fluid is h. The specific gravity is given to be 0.8 hence, the density of oil is = 0.8 x 1000 kg/m³ = 800 kg/m³. The depth of the oil is given as 80 cm, which is equivalent to 0.8 m. The acceleration due to gravity is approximately 9.81 m/s².

Substituting these values into the formula for gauge pressure, we get,

P = ρgh = (800 kg/m³) x (9.81 m/s²) x (0.8 m) = 6278.4 N/m²

To express the pressure in kPa, we divide by 1000,

P = 6278.4 N/m² ÷ 1000 = 6.2784 kPa

Therefore, the gauge pressure at a depth of 80 cm in the oil with specific gravity 0.8 is 6.2784 kPa.

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