a tanker discharges a jet of water horizontally backwards with a velocity of 4.8 m/s. if the rate of discharge is 0.085 m3/s, what is the force required to keep the tanker at rest?

The Uniform Circular Motion Interactive is a tool that allows users to explore the physics of uniform circular motion. The user can change the radius of the circle, the speed of the object, and the mass of the object.

When an object moves in a circle at a constant speed, it is said to be in uniform circular motion. The velocity of the object is constantly changing direction, even though the speed is constant. This means that the object is accelerating.

The acceleration of an object in uniform circular motion is directed towards the center of the circle. The magnitude of the acceleration is equal to the square of the speed of the object divided by the radius of the circle.

The net force on an object in uniform circular motion is always directed towards the center of the circle. The magnitude of the net force is equal to the mass of the object times the acceleration of the object.

The Uniform Circular Motion Interactive is a valuable tool for understanding the physics of uniform circular motion. It allows users to explore the effects of changing the radius of the circle, the speed of the object, and the mass of the object on the velocity, acceleration, and net force of the object.

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Answer:

5 Components of Physical Fitness

Cardiovascular Endurance.

Muscular Strength.

Muscular endurance.

Flexibility.

Body Composition.

If a star has a luminosity of 2 times the luminosity of the Sun (2L⊙), and its radius is doubled, its luminosity would increase by a factor of 4.

The luminosity of a star is directly proportional to the fourth power of its radius according to the Stefan-Boltzmann law. When the radius of a star is doubled, the luminosity increases by a factor of (2^4) = 16. However, in this case, the star's luminosity is only 2 times that of the Sun. Therefore, the luminosity increase is only by a factor of 2.

So, if the star's initial luminosity is 2L⊙, when its radius is doubled, the new luminosity would be 4L⊙.

To determine the surface temperature of a star that emits twice the energy flux (watts per square meter) as the Sun, we can use the Stefan-Boltzmann law again. The energy flux is directly proportional to the fourth power of the star's temperature. Since the energy flux is doubled, we need to find the temperature at which the fourth power is doubled compared to the Sun's temperature.

Let T⊙ be the temperature of the Sun's surface (5800 K). If we assume T is the surface temperature of the star we're interested in, we have the following relationship:

(T^4) = 2 * (T⊙^4)

Simplifying the equation, we find:

T = (2^(1/4)) * T⊙

Therefore, the surface temperature of the star that emits twice the energy flux of the Sun is approximately (2^(1/4)) times the surface temperature of the Sun.

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Take the direction of motion to be the positive direction. The crate slows to a rest from 30.0 m/s in a matter of 5.0 s, so it has acceleration a such that

0 = 30.0 m/s + a (5.0 s)   →   a = -6.0 m/s²

At the moment its speed is 0, the crate has a net force of s + f acting in negative direction, where s and f denote the magnitudes of the stopping force (s = 250 N) and the friction force, respectively. By Newton's second law, we have

(-s) + (-f) = (100 kg) (-6.0 m/s²)

250 N + f = 600 N

f = 350 N

The friction force is proportional to the normal force by a factor of µ, the coefficient of kinetic friction. There is no movement in the up- and downward directions, so Newton's second law says

(-w) + n = 0

where w is the weight of the crate and n is the magnitude of the normal force. So

n = w = (100 kg) (9.80 m/s²) = 980 N

Then

f = µ n

350 N = µ (980 N)

µ = (350 N) / (980 N) ≈ 0.357

Frequency is perceived by humans as pitch; The sound intensity is the amplitude; Humans can only hear a specific range of sound, usually from 20 Hz to 20,000 Hz; The factors that go into a sound are its intensity, frequency and overtones (which are like interference, or background noises).

It's "Pitch" on edge.

The coefficient of kinetic friction is approximately 0.313.

To find the coefficient of kinetic friction, we need to know the force of kinetic friction acting on the block.

Given:

Mass of the block (m) = 2.8 kg

Applied force (F) = 8.6 N

Since the block is moving at a constant speed, we know that the force of kinetic friction\((f_k)\) must be equal in magnitude and opposite in direction to the applied force (F).

Therefore, \(f_k = F = 8.6 N.\)

The coefficient of kinetic friction (μ_k) relates the force of kinetic friction to the normal force (N) exerted on the block by the surface.

The formula to calculate the force of kinetic friction is:

\(f_k = μ_k * N\)

Since the block is on a level surface, the normal force (N) is equal in magnitude and opposite in direction to the gravitational force acting on the block, which can be calculated as:

\(N = m * g\)

where g is the acceleration due to gravity (approximately 9.8 m/s²).

Substituting the given values:

N = 2.8 kg * 9.8 m/s²

N = 27.44 N

Now we can solve for the coefficient of kinetic friction\((μ_k):\)

\(f_k = μ_k * N\)

\(8.6 N = μ_k * 27.44 N\)

Dividing both sides by 27.44 N:

\(μ_k = 8.6 N / 27.44 N\)

\(μ_k ≈ 0.313\).

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The time required to accelerate the car from rest to a speed of 100 km/h is approximately 16.67 seconds.

What is power?

Power is an important concept in many fields of science and engineering, including mechanics, thermodynamics, electrical engineering, and more. It is used to describe the performance of machines and systems, such as engines, motors, generators, and power plants. It is also used to quantify energy consumption, efficiency, and cost in various applications, such as transportation, manufacturing, and renewable energy systems.

According to given conditions :

To determine the time required to accelerate the car, we need to use the following formula:

v = u + at

where v is the final velocity, u is the initial velocity (which is zero in this case), a is the acceleration, and t is the time.

We can calculate the acceleration using the formula:

P = F × v

where P is the power of the engine, F is the force applied, and v is the velocity. Solving for F and substituting the given values, we get:

F = P / v

where P = 75 kW and v = 100 km/h = 27.78 m/s (we need to convert km/h to m/s).

F = (75,000 W) / (27.78 m/s) ≈ 2697.7 N

Using Newton's second law of motion, F = ma, we can solve for the acceleration:

a = F / m

where m = 1620 kg (the mass of the car).

a = (2697.7 N) / (1620 kg) ≈ 1.6667 m/s^2

Now, we can use the formula for time to find the time required to accelerate from rest to a speed of 100 km/h:

t = (v - u) / a

where v = 27.78 m/s (the final velocity).

t = (27.78 m/s - 0) / (1.6667 m/s^2) ≈ 16.67 s

Therefore, the time required to accelerate the car from rest to a speed of 100 km/h is approximately 16.67 seconds.

Is the answer realistic? It is possible, but it depends on several factors, such as the road conditions, the driver's skill, and the vehicle's transmission and gearing. This calculation assumes that the engine can deliver its full power continuously during the acceleration process, which may not be realistic in practice. Also, it does not take into account factors such as air resistance, rolling resistance, and other sources of friction, which can affect the actual acceleration time.

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The mass of the other star in the binary system is approximately 0.541 solar masses.

To find the mass of the other star in the binary system, we can use Kepler's Third Law of Planetary Motion, which can be applied to binary star systems. The law states that the square of the orbital period (\(T\)) is proportional to the cube of the semi-major axis (\(a\)) of the orbit. Mathematically, this can be expressed as\(\(T^2 = \frac{4\pi^2}{G(M_1 + M_2)}a^3\), where \(M_1\) and \(M_2\)\)  are the masses of the stars,\(\(G\)\) is the gravitational constant, and other variables have their usual meanings.

Given that one star has a mass of 1.00 solar masses, we can substitute the known values into the equation and solve for\(\(M_2\)\). Rearranging the equation, we have\(\(M_2 = \frac{4\pi^2}{G}(\frac{a^3}{T^2}) - M_1\)\).

Plugging in the values for\(\(a\) (1.34E+10 km) and \(T\) (400 years)\), and using the appropriate unit conversions, we can calculate the mass of the other star,\(\(M_2\\), to be approximately 0.541 solar masses.

Therefore, the mass of the other star in the binary system is approximately 0.541 solar masses.

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Answer: 17,000

Explanation: I got it right

To find the ratio of the work done by the heat engine to the work done by the pump, we can use the following equation:

Ratio of work = (Work done by the heat engine) / (Work done by the pump)

Given:

Heat absorbed from the hot reservoir (Q_hot) = 2500 J

Heat expelled to the cold reservoir (Q_cold) = 1000 J

Heat pumped to the hot reservoir (Q_hot_reversed) = 2500 J

Work required by the pump (W_pump) = 1500 J

To calculate the work done by the heat engine, we use the first law of thermodynamics:

Work done by the heat engine = Q_hot - Q_cold

Work done by the heat engine = 2500 J - 1000 J = 1500 J

Now we can substitute the values into the equation to find the ratio:

Ratio of work = (1500 J) / (1500 J) = 1.0

Therefore, the ratio of the work done by the heat engine to the work done by the pump is 1.0.

Regarding the reversibility of the heat engine, we can determine it by comparing the efficiencies of the engine in the forward and reverse directions. If the efficiencies are the same, the engine is reversible.

The efficiency of a heat engine is given by:

Efficiency = 1 - (Q_cold / Q_hot)

Efficiency = 1 - (1000 J / 2500 J) = 1 - 0.4 = 0.6 = 60%

When the heat engine is run in reverse, the efficiency is:

Efficiency_reversed = 1 - (Q_hot_reversed / Q_cold)

Efficiency_reversed = 1 - (2500 J / 1000 J) = 1 - 2.5 = -1.5 = -150%

Since the efficiency in the reverse direction is negative (-150%), it means that the reversed process is not possible. This indicates that the heat engine is not reversible.

Therefore, the correct answer is:

b) 1.0 (No)

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Given

The concept of inertia forms the basis for Newton's Third Law of Motion

To find

The given statement is true or false

Explanation

The third law of motion states that every action has a equal and opposite reaction

Inertia is the property by virtue of which an object at rest tends to be at rest and object at motion tends to be at motion

Thus both the concept are not similar

Conclusion

The given statement is false

Answer:

Its scatter plot graph.

Explanation:

I took the test and got it right soo your welcome.

The reaction force in the scenario of a dog pulling on a leash is that the leash pulls on the dog.

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In the given scenario, when the dog pulls on the leash, it exerts a force on the leash in one direction. As a result, the leash exerts an equal and opposite force on the dog in the opposite direction, known as the reaction force. This is because the leash resists the dog's pulling force, creating tension in the leash. The reaction force allows the dog to feel the resistance and tension of the leash, effectively preventing the dog from moving forward freely. Therefore, the reaction force in this case is that the leash pulls on the dog. It is important to note that the reaction force is a result of the dog's action and is of equal magnitude but opposite in direction.

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As water flow increases, friction losses in a water distribution pipeline typically increase.

As the stream expansions in a water dissemination pipeline, the erosion misfortunes in the pipeline commonly increment. This is on the grounds that the water coursing through the pipeline makes rubbing as it rubs against the walls of the line. The quicker the water streams, the more prominent the rubbing and consequently the more noteworthy the misfortunes. Moreover, at higher streams, the disturbance of the water likewise builds, which can additionally expand the rubbing misfortunes.

Notwithstanding, it is essential to take note of that the contact misfortunes in a pipeline can likewise be impacted by a few different variables, like the line material, breadth, length, unpleasantness, fittings, and twists. Consequently, now and again, it is conceivable that the rubbing misfortunes might diminish as the stream builds because of changes in these different variables.

By and large, the impact of expanding stream on erosion misfortunes in a water conveyance pipeline can fluctuate contingent upon a few elements, and it is essential to consider this multitude of variables while planning or examining a pipeline framework.

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Answer:

Positively charged nuclei are packed in an organized pattern, and the negatively charged valence electrons flow freely.

Explanation:

The atoms in a conducting wire are organized by the Positively charged

nuclei being packed in an organized pattern, and the negatively charged

valence electrons flow freely.

A conducting wire involves the flow of electric current between the

atoms.The electric current excites the electrons thereby resulting in their flow .

The valence electrons are affected because they haven't achieved an

octet configuration and aren't stable which gives rise to their free flow

within the wire.

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The volume of gasoline with a density of 0.680 g/cm3 and a mass of  4,400 g is: 6,470.58 cm3

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume we get:

d = m/v

v = m/ d

v = 4,400 g/0.680 g/cm3

v = 6,470.58 cm3

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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I can help you but I can't understand this language please explain it.

Answer:

lol

Explanation:

In a series circuit current is directly proportional to the voltage and inversely proportional to the resistance so if we double the values of voltage and resistance the current should be same.

Series circuit is the circuit where all the components are connected in a single path for the current flow. In series circuit the total resistance is equal to the sum of all the resistance and total voltage drop is equal to the sum of all the voltage drops across the resistors. According to the Ohm’s law voltage across a conductor is directly proportional to the current flowing through it. I=V/R where I is current, V is voltage and R is resistance.

In the given question V = 10 v, I = 5 ma R=?

From Ohm’s law  I=V/R        5 =10/R

                             R= 10/5     = 2

If we double the value of voltage and resistance the current=?

V=20v, R= 4 then I=?

I=V/R           =20/4       = 5ma.

The current remains same.

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Answer:

velocity is the rate of change of distance moved with a time in a specific direction. While speed is the rate if distance with time in no specific direction

Answer:

the picture isn't clear!! that is the reason why people can't answer

Answer:

1) The specific heat is the heat required to be added to a unit mass of the substance to cause a unit rise in its temperature

2) The temperature change is 20.92°C

Explanation:

The given parameters are;

The mass of the substance, m = 2.50 g

The heat released by the sample, ΔQ = 12 calories = 50.208 J

The specific heat capacity of the substance, c = 0.96 J/(g·°C)

Therefore, we have;

Heat released, ΔQ = Mass, m × Specific heat capacity, c × Temperature change, ΔT

Substituting in the known values gives

50.208 J = 2.50 g × 0.96 J/(g·°C) × ΔT

ΔT = 50.208 J/(2.5 g× 0.96 J/(g·°C)) = 20.92°C

The temperature change = 20.92°C

Answer:

C

Explanation:

(C) Positively charged particles moved upward, causing the top of the rod to have a positive charge and the bottom of the rod to have a negative charge.

When a neutral and non-polarized conducting rod moves through a magnetic field, it will experience a force known as the Lorentz force. This force acts on the moving charges within the rod, and causes them to move perpendicular to both the direction of motion and the magnetic field. In this case, since the rod is moving to the right, and the magnetic field is pointing into the screen, the Lorentz force will act upward on the positively charged particles within the rod. This motion will cause a separation of charges in the rod, with the top having a positive charge and the bottom having a negative charge.

Answer:

A. They can provide an accurate picture of someone’s personality.

C. They can be used to target employee training.

E. They may lead to lower turnover rates.

Explanation:

A. They can provide an accurate picture of someone’s personality and C. They can be used to target employee training, E. They may lead to lower turnover rates.

The phrase "assessment" refers to the broad range of techniques or instruments that educators employ to assess, gauge, and record pupils' academic preparedness, learning progress, skill development, or educational requirements.

Education professionals use a wide range of assessment tools and methods to gauge everything from a four-year-readiness old's for kindergarten to a twelfth-grade student's comprehension of advanced physics.

Despite the fact that assessments are frequently mistaken for traditional tests, particularly the standardized tests created by testing companies and given to large populations of students, educators use a variety of assessment tools and methods.

Therefore, A. They can provide an accurate picture of someone’s personality and C. They can be used to target employee training, E. They may lead to lower turnover rates.

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Answer:

an abbreviation formed from the initial letters of other words and pronounced as a word (e.g. ASCII, NASA ).

Explanation:

....

Answer:

Definition of acronym:a word (such as NATO,radar or laser)formed from the initial letter or letters of each of the successive parts or major parts of a compound term also :an abbreviation (such as FBI formed from initial letters:intialism.

Explanation:

Hope it helps

Answer:

Aesthetic sports

Explanation:

Aesthetic sports are the one's that need well-developed physical qualities such as strength, agility, stamina, flexibility, and technical knowledge and artistry, in addition to technical ability and artistry. Elite athletes in these sports generally have a low abdominal fat , and the ranking is subjective.

In aesthetic sports like gymnastics, swimming, and figure skaters, dynamic and proactive flexibility is required.

Answer:

2.5 Hz

Explanation:

3.0m/s / 1.2 m=2.5 1/s=2/5 Hz

The frequency of a wave with speed of 3.0 m/s and has a wavelength of 1.2m is 2.5 Hz.

The frequency of a wave is the number of cycles per second.

Given the wavelength is 1.2 m and speed v =3.0m/s, then the frequency of the wave is

v =fλ

f = 3 / 1.2

f = 2.5 Hz

Thus, the frequency of the wave is 2.5 Hz.

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Answer:

displacement=-21

distance=39

Explanation: