How long will it take a horse to gallop 20 miles at 4mph
hours

Answer:

        v = √k/m    x

Explanation:

We can solve this exercise using the energy conservation relationships

starting point. Fully compressed spring

        Em₀ = \(K_{e}\) = ½ k x²

final point. Cart after leaving the spring

        \(Em_{f}\) = K = ½ m v²

        Em₀ = Em_{f}

        ½ k x² = ½ m v²

        v = √k/m    x

After 5 years of depreciation at a rate of 8.2% per year, the car would be worth approximately $93,196.90.

To calculate the value of the car after 5 years of depreciation, we can use the equation provided:

v = 150,000 * (1 - 0.082)⁵

First, we calculate the depreciation rate per year by subtracting the depreciation rate (8.2%) from 1: (1 - 0.082) = 0.918.

Next, we raise this depreciation rate to the power of 5, as we are calculating the value after 5 years.

0.918^5 ≈ 0.677

Finally, we multiply this value by the initial value of the car ($150,000) to find the depreciated value after 5 years:

v ≈ 150,000 * 0.677 ≈ $93,196.90

Therefore, after 5 years of depreciation at a rate of 8.2% per year, the car would be worth approximately $93,196.90.

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The product among alcohol, gasoline, travel souvenirs, cigarettes that will have elastic demand is cigarettes.

Elastic demand refers to a situation in which a change in the price of a good or service results in a more significant change in the amount demanded. When the percentage change in quantity demanded is greater than the percentage change in price, the demand for the product is said to be elastic.

When the quantity demanded of a product decreases significantly when the price rises, the demand for the product is said to be elastic. Similarly, when a slight change in price causes a significant change in quantity demanded, the demand is said to be elastic. Conversely, if a product's price increases by a small percentage, and the demand for the product decreases by a smaller percentage, the demand for the product is said to be inelastic.

Cigarettes, of all the products listed above, are likely to have an elastic demand.

This is because smokers who are addicted to cigarettes are more likely to quit smoking or reduce their consumption in response to an increase in the price of cigarettes compared to the other goods.

Thus, a slight increase in the price of cigarettes is likely to cause a significant decrease in the number of cigarettes consumed.

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Answer:

\(-\frac{1}{2}\)

Diverging lens

Explanation:

Given parameters:

Power of lens  = -2.0D

Unknown:

Focal length  = ?

Solution:

The power of lens is the reciprocal of the focal length;

   P  = \(\frac{1}{f}\)

where  f is the focal length

 f  = \(\frac{1}{P}\)   = \(-\frac{1}{2}\)

The lens is a diverging lens

The magnitude of the magnetic field inside the solenoid is 1.26 x 10⁻⁴ T.

The magnetic field inside a solenoid can be calculated using the formula B = μ₀nI, where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.

In this case, the solenoid has a length of 2.00 m and a radius of 1.00 cm, which means that the number of turns per unit length is n = N/L = 2000/2.00 = 1000 turns/meter. The current is given as I = 0.100 A.

The permeability of free space is μ₀ = 4π x 10⁻⁷ T m/A.

Substituting these values into the formula, we get:
B = μ₀nI
B = (4π x 10⁻⁷ T m/A)(1000 turns/m)(0.100 A)
B = 1.26 x 10⁻⁴ T

Therefore, the magnitude of the magnetic field inside the solenoid is 1.26 x 10⁻⁴ T.

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Answer:

A. Gamma rays

or D. microwaves

Explanation:

correct me if i am wrong

GMm/r = mv². This is the same as the centripetal force equation, which we know to be true since the orbit is circular.

The mass of the earth is M, the gravitational constant is G, and the orbital radius is r. The mass of the satellite is m and its velocity is v. We assume that the orbit is a perfect circle and that the only force acting on the satellite is the gravitational force between the satellite and the earth. We will determine the value of the radius of the orbit (r) in terms of known constants M, m, G and v.

Solve the equation on the far right for v. Then substitute this expression for "v" into the first set of equations. Now solve for "r," the radius of the discrete orbit.

Since the orbit is a perfect circle, the centripetal force is given by F = mv²/r. The gravitational force between the satellite and the earth is given by F = GMm/r². Since these are equal, we can equate these two and get

mv²/r = GMm/r²

Multiplying both sides by r², we get

v²r = GMm

Dividing both sides by v², we get

r = GM/v²

Substituting this value of r in the second equation, we get

F = mv²/GM × v²

Substituting this value of v² from the above equation, we get

F = mGM/r²

Therefore, r = √(GM/F)

Given information:

The mass of the earth is M, the gravitational constant is G, and the orbital radius is r. The mass of the satellite is m and its velocity is v. We assume that the orbit is a perfect circle and that the only force acting on the satellite is the gravitational force between the satellite and the earth. We will determine the value of the radius of the orbit (r) in terms of known constants M, m, G and v.

Therefore, the expression for v is

v = √(GM/r)

Substituting this value of v in the first set of equations, we get

GM/r² = v²/r

GM = v²r

Multiplying both sides by r, we get

GMm/r = mv².

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Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Answer:

0.543 kilogram

Explanation:

thats the answer

Answer:

is: B. why ? u ask.... well u forgot one important factor when ansering that factor being that...... H'ES CRACKED AT FORTNITE MY GUY

i desereve bwainweist... JK LOL give it to the other guy.

The given one is an experiment because it tests a cause and effect relationship. The rate of photosynthesis is determined by measuring the concentration of carbon dioxide on an enclosed transparent chamber.

Photosynthesis is a biochemical process by which green plants synthesis chemical energy with the aid of light energy. The photosynthetic reaction is  the combination of carbon dioxide and water to form oxygen molecule and glucose.

The photosynthetic reaction is given here:

\(\rm 6CO_{2} + 6H_{2}O \rightarrow C_{6}H_{12}O_{6} + 6O_{2}\)

Here, the oxygen gas is the product in the reaction. Hence, increase in the oxygen level will reverse the reaction and thus, rate of photosynthesis decreases.

The rate of photosynthesis is determined by the measurement of concentration of carbon dioxide within the closed transparent chamber in which the plant is placed. Hence, we are testing a cause and effect and it is a scientific experiment. Hence, option A is correct.

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The motion of one particle of a gas is unaffected by the motion of other particles of the gas unless the particles collide.

Heat is the primary cause of particle motion on Earth. The temperature of any substance is correlated with the energy of the atoms and molecules that comprise it. Energy is conserved, thus if one particle loses energy, another one acquires it.

The components of matter are also continually in motion. They are energetic in motion. The kinetic theory of matter states that all matter is made up of particles that are constantly moving.

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A(n) "open system" interacts and has exchanges with elements in its environment.

In the context of systems and their interactions, an open system refers to a system that can exchange matter, energy, or information with its surroundings. This means that an open system can receive inputs from its environment, process them internally, and produce outputs back into the environment.

Examples of open systems in various domains include living organisms, ecosystems, industrial processes, and communication networks. These systems are characterized by their ability to interact, exchange materials or energy, and be influenced by external factors. The concept of an open system is widely used in fields such as physics, biology, ecology, and engineering to understand and analyze the behavior of complex systems that are not isolated from their surroundings.

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For an object to be considered a main sequence star,

b. It must have a specific mass range, and

d. It must undergo fusion reactions.

Main sequence stars are in a stable phase of their stellar evolution and represent the majority of stars in the universe. They follow a specific relationship between their mass, luminosity, and temperature on the Hertzsprung-Russell diagram. The main criterion for a star to be classified as a main sequence star is that it must fall within a specific mass range. This range varies, but typically includes stars with masses between approximately 0.08 and 150 times the mass of our Sun.

Additionally, main sequence stars sustain their energy through fusion reactions that occur in their cores. These fusion reactions, typically involving the conversion of hydrogen into helium, release vast amounts of energy in the form of light and heat. This energy production is what allows main sequence stars to emit visible light, making it another characteristic of such stars.

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A. The SI unit of force is the newton, symbol N.
b. The SI unit for distance is the meter (m)
c. The SI unit of work is joule (J). 
or Sometimes, newton-metre (N-m) is also used for measuring work.

Answer:

Explanation:

When two materials are rubbed against each other, they become charged.

It is called charging by rubbing.

Hope this helps

plz mark as brainliest!!!!!!!

The frequency difference between the emitted sound (407.83 Hz) and the reflected sound (413.81 Hz) is caused by the Doppler effect.

This effect occurs when there is relative motion between the source of sound (the boy on the bicycle) and the observer (the wall). The speed of the boy can be determined using the formula for the Doppler effect:
f' = f * (v + vo) / (v + vs)
Where f' is the reflected frequency (413.81 Hz), f is the emitted frequency (407.83 Hz), v is the speed of sound in air (340 m/s), vo is the velocity of the observer (the wall, 0 m/s), and vs is the velocity of the source (the boy, which we need to find).

413.81 = 407.83 * (340 + 0) / (340 + vs)
Solving for vs, we get:
vs = ((413.81 * 340) / 407.83) - 340
vs ≈ 4.91 m/s
Therefore, the boy is riding his bicycle toward the wall at a speed of approximately 4.91 meters per second.

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Technician A says that rotary motion of the pistons is converted to reciprocating motion of the crankshaft which is correct.

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To find the average acceleration of the sports car, we need to calculate the change in velocity and divide it by the time taken.

Given:

Initial velocity, u = 0 (as the car starts from rest),

Final velocity, v = 95 km/h,

Time, t = 4.3 s.

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

v = 95 km/h = (95 * 1000) m/3600 s = 26.39 m/s.

Now, we can calculate the average acceleration using the formula:

Average acceleration (a) = (Change in velocity) / (Time)

                     = (v - u) / t

                     = (26.39 m/s - 0) / 4.3 s

                     = 6.13 m/s².

Therefore, the average acceleration of the sports car is 6.13 m/s².

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The direct answer to your question is that electric engines can be more than 80% efficient and even up to 90% efficient while combustion engines are 30 to 45% efficient.

Electric motors make vehicles substantially more efficient than internal combustion engines. Electric motors convert over 85 percent of electrical energy into mechanical energy, or motion, compared to less than 30 to 40 percent for a gas combustion engine.

These efficiencies are even lower after considering losses as heat in the drivetrain, which is the collection of components that translate the power created in an electric motor or combustion engine.

• Motor efficiency: 85..90%

• Battery load efficiency: 80..90 %

• Battery discharge efficiency: 80..90 %

• Power generation efficiency at power: 30..40 %

• Transfer efficiency from the powerplant to the reloading station: 90..95 %

• Energy conversion efficiency AC to DC: 90..95 %

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The sound pressure level produced within the roof void as a result of the plant room noise is calculated to be 48 dB.

To determine the sound pressure level in the roof void, we utilize the sound reduction index of the plant room wall and the sound pressure level in the plant room. The formula used for this calculation is L2 = L1 - R, where L2 represents the sound pressure level in the roof void, L1 denotes the sound pressure level in the plant room, and R signifies the sound reduction index of the plant room wall adjoining the roof void. Given that the sound pressure level in the plant room is 61 dB and the sound reduction index of the plant room wall is 13 dB, we substitute these values into the formula to find the sound pressure level in the roof void:

L2 = 61 dB - 13 dB

L2 = 48 dB

Hence, the sound pressure level produced within the roof void as a result of the plant room noise is determined to be 48 dB. To further reduce the sound pressure level from the plant room to the adjacent rooms, there are several recommended strategies. One approach is to improve the sound insulation of the common wall between the plant room and the adjacent rooms. This can involve increasing the sound reduction index of the wall by adding sound-absorbing materials or panels, or enhancing the sealing of any gaps or openings to minimize sound leakage.

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Answer:

Heinrich Hertz

Explanation:

scientist that developed the wave-particle theory of electromagnetic radiation

The Ptolemaic model was a geocentric model of the Solar System developed by the ancient Greek astronomer, mathematician, and geographer Claudius Ptolemy.

According to this model, the Earth was at the center of the universe, and all the other celestial bodies revolved around it. Each planet in the Ptolemaic model was believed to move along a circular path called an "epicycle," which was centered on a point called the "deferent." The deferent, in turn, moved along a circular path around the Earth, called the "eccentric." The epicycle's center moved along the deferent at a constant rate, which gave the appearance of retrograde motion of the planet relative to the Earth. The Ptolemaic model was a complex and intricate system that required numerous epicycles, deferents, and eccentrics to explain the observed motions of the planets. While it was able to account for some of the observed planetary motions with reasonable accuracy, it had limitations and inaccuracies that became apparent as observations became more precise over time.

Here,

Eventually, the Ptolemaic model was replaced by the heliocentric model developed by Nicolaus Copernicus, which placed the Sun at the center of the Solar System and explained the observed motions of the planets more accurately.

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Answer:

distance- I think it is 6 then the displacement is 13.41

Explanation:

Answer:

weow hahaha lol!

Explanation:

Answer:

LOLOLOLOLOL LOL

Explanation:

When high voltages are present, a glow may be seen around sharp points, known as corona discharge.

This glow is caused by the ionization of the air molecules near the sharp point due to the electric field strength. The ionized air molecules emit light, creating a visible glow. The intensity and color of the glow depend on the voltage level and the gas composition of the surrounding environment.

Corona discharge is a phenomenon that occurs when high voltages are applied to a conductor, especially in the presence of a sharp point or a high electric field. It results in the ionization and excitation of the surrounding air molecules, creating a glowing or visible aura of light around the conductor. The ionized air can also produce a hissing or crackling sound. Corona discharge is often observed in high-voltage power lines, antennas, and other high-voltage equipment. It is important to note that corona discharge can cause power loss and interfere with the proper functioning of electrical systems, so efforts are made to minimize its occurrence in high-voltage applications.

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The potential difference required, use the formula V = K.E. / Q. Substitute the values of charge and mass to calculate the potential differences for the given particles.

To determine the potential difference required to accelerate the particles, we can use the formula for the kinetic energy of a particle:

K.E. = (1/2)mv^2

where m is the mass of the particle and v is its velocity.

a) For a particle with a charge of 4e and a mass of 6u, we need to find the kinetic energy when its velocity is 0.09c. Since the speed of light, c, is approximately 3 x 10^8 m/s, the velocity of the particle is 0.09c = 0.09(3 x 10^8) = 2.7 x 10^7 m/s. Substituting the values into the formula, we get:

K.E. = (1/2)(6u)(2.7 x 10^7)^2

Now, we know that the potential difference, V, is equal to the change in electric potential energy (ΔPE) divided by the charge (Q). Since the particle is initially at rest, the initial electric potential energy is zero. Therefore, the potential difference needed is equal to the kinetic energy divided by the charge:

V = K.E. / (4e)

b) For a particle with a charge of 94e and a mass of 220u, we follow the same steps as above, but substitute the values accordingly:

V = K.E. / (94e)

By calculating the respective values for V using the given formulas and the provided charge and mass values, we can determine the potential differences required for the given particles to accelerate to 0.09c.

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We would apply the relativistic kinetic energy formula which is expressed as

KE = (y - 1)mc^2 = [1/√(1 - v^2/c^2 - 1]mc^2

where

m is the mass of proton

c is the speed of light

v is the speed of the proton

From the information given,

m = 1.67 x 10^-27 kg

c = 3 x 10^8 m/s

v = 0.54c

Thus,

KE = 1.67 x 10^-27 x (3 x 10^8)^2[1/√(1 - (0.54c/c)^2 - 1]

KE = 28.27 x 10^-12 J

We would convert from joules to mev

1 J = 6,241,509,343,260 MeV

28.27 x 10^-12 = 28.27 x 10^-12 x 6,241,509,343,260

KE = 176.48 Mev

the translational kinetic energy is 176.48 Mev