. A force P pulls on a crate of mass m that is in contact with a rough surface. The figure shows the magnitudes and directions of the forces that act on the crate in this situation. What is the magnitude of the normal force on the crate? A) 57 N B) 80 N C) 160 N D) 196 N E) 230 N AFN 160N 60° 80 N W=196 N

Answer:

FN=-Fg -> Fg=mg -> Fg = 238 kg*9.8 m/s^2 ->

Fg = -2432.4 so FN = 2432.4 -> FF = μs*FN ->

FF = 0.22*2332.4 N -> FF = 513.128 ->

Fapplied > 513.128 N

Explanation:

...

The resultant vector is 60.2 meter in a direction 48.6° North of west.

Resultant vectors are the product of the addition of two or more vectors.

The resultant vector is obtained by vector addition methods such as:

Considering the vector addition problem given:

Harry travels 40 meters east and then 45 meters south to catch the snitch in a quidditch match. At the same time, Voldemort who was 40 meters away, came racing 30 meters west towards Harry, then he went south of west at 25 degrees crashing into harry.

The resultant vector of both Harry and Voldemort are the same since the crashed into each other.

Using Harry's movement, the motion forms a right angle triangle of sides 40 m and 45 m

Using Pythagoras' rule:

R = √(40² + 45²)

R = 60.2 meter

α = tan⁻¹(40/45)

α = 41.6

θ = 90 - 41.6

θ = 48.6°

Therefore, the resultant vector is 60.2 meter in a direction 48.6° North of west.

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Electrostatic precipitators use electrical charges to attract and trap pollutants, such as dust particles, sulfur dioxide, and smoke particles.

This technology works by using high voltage to ionize the pollutant particles, which changes their electrical charge and results in an attractive electrical force that is directed to metal plates or tubes, known as collectors.

Once the particles reach the collector, they build up and can be removed from the air. This technology is usually used to control emissions of particles that are too small to be blocked by traditional mechanical filters, such as those found in large power plants and fossil fuel facilities.

Because electrostatic precipitators are so efficient and powerful, they are now frequently used in many industries where air pollution control is needed. With proper maintenance and upkeep, this technology can be very effective in reducing air pollution, and keeping the surrounding air clean.

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Answer:

What’s your question

Explanation:

And where

Answer:

its upside down

Explanation:

Answer:

It depends on the model but these are the watts of each motor

Explanation:

Un motor: 258 HP (262 CV) Dual motor: 154 kW (209 CV) y 197 kW (268 CV). Performance: 154 kW (209 CV) y 225 kW (306 CV).

Where a tap supplies water at 26°c while another supply at 82°c. If a man wishes to bath with water at 40°c, then the ratio of the mass of hot water to that of cold water is: 1/3.

The ratio of the mass of hot water to that of Cold water is determined as follows:

M₁C (82  40) = M₂C (40-26)

Where M₁C is the Mass of Tap 1; and

M₂C is the Mass of Tap 2.

Thus,

M₁C (82  40) = M₂C (40-26)

M₁/M₂ = 14/42

= 1/3

Thus, it is right to state that the ratio of the mass of hot water to that of cold water is: 1/3.

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The distance covered by Sam within the first 13 seconds is 96.75 m.

Given that the mass m of Sam is 80 kg and the force F is 170 N. The coefficient of friction is 0.1.

The net force is given below

Fₙ = F - F₁

Where Fₙ is the net force and F₁ is the friction force.

Fₙ = 170 - μmg

Fₙ = 170 - 0.1 x 80 x 9.8

Fₙ = 91.6

Fₙ = ma

91.6 = 80 x a

a = 91.6 / 80

a = 1.145 m/s²

For the first 13 seconds.

So, the distance covered by Sam with this acceleration is given .

s = ut + 1/2 at²

u is the initial velocity which will be zero and t is the time interval.

So,

s = 1/2 at²

s = 1/2 x 1.145 x 13²

s = 96.75 m

Hence, the distance covered by Sam within the first 13 seconds is 96.75 m.

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Answer:

2 moles of phosphorus difluoride

2PFsubscript2

I hope it will be useful.

Answer:

convex and 1 plane mirror

The velocity of the diver when he is 5 m from hitting the water is 10.7 m/s. We can solve this problem using the conservation of energy.

The Law of Conservation of Energy was discovered in 1842 by Julius Robert Mayer. It is now known as the First Law of Thermodynamics, which states that energy neither creates nor destroys itself.

PE = mgh\

where:

m = mass of the diver = 85 kg

g = acceleration due to gravity = 9.81 m/s^2

h = height of the dive = 12 m

\(PE = (85 kg) *(9.81 m/s^2) * (12 m) = 9997.8 J\)

As the diver falls, the potential energy is converted into kinetic energy given by:

\(KE = (1/2)mv^2\)

When the diver is 5 m from hitting the water, his potential energy has decreased to:

\(PE = (85 kg) * (9.81 m/s^2) * (12 m - 5 m) = 6419.5 J\)

Since the total energy is conserved, we can equate the potential and kinetic energies at this point:

PE = KE

\(6419.5 J = (1/2) * (85 kg) * v^2\)

Solving for v, we get:

\(v = \sqrt(2 * 6419.5 J / 85 kg)\\= 10.7 m/s\)

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Answer:

they move towards the positive side... that's option 2

Answer:

F=ma

=25×5

=125 N ,,,,,,

Answer:

F = 125 N

Explanation:

We know, Force (N) = mass (kg) × acceleration (m/s²).

F = ma

⇒ F = 25 kg × 5 m/s²

∴ F = 125 N

R=10+15+30

55 is the answer to the question

Answer:

a) 102 meters

b) 14 meters

c) The direction is eastward.

Explanation:

Distance is said to be the length between two points. It is a scalar quantity.

a) The distance moved = 36 + 44 + 22

                                       = 102 meters

b) Displacement is the distance moved in a specified direction.

Representing the distance moved with specific direction as a directed number, 36 meters eastward = +36, 44 meters westward = -44, and 22 meters eastward = +22

/Displacement/ = +36 -44 +22

                         = +58-44

                         = 14

The magnitude of the displacement is 14 meters.

c) The direction is eastward.

So that the magnitude of displacement and his direction is 14 meters eastward.

(A) The solution X is unsaturated

(B) The solution Y should contain 2.9 g solute in 1000 mL solution.

(C) The percentage by mass of the solute is 40%

(A) The type of solution X is determined as follows;

The maximum amount of solute that can dissolve in solution  X  =  29 g/Liter

The amount of solute in solution X = 2.9 g/Liter

This solution is unsaturated because the amount of solute present is less than the maximum the solution can take.

(B) The amount solute and volume in the solution Y is calculated as follows;

The solubility = 2.9 g/Liter

\(solubility = \frac{2.9 \ g}{L} \times \frac{L}{ mL \times 1000} = \frac{2.9 \ g}{1000mL}\)

Thus, the solution should contain 2.9 g solute in 1000 mL solution.

(C) The percentage by mass of the solute is calculated as;

\(mass \ \% = \frac{20 \ g}{50 \ g} \times 100 \% = 40 \%\)

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In contrast to Aristotle's way of explaining nature, Galileo relied on empirical observation and experimentation.

Aristotle, a Greek philosopher, relied on deductive reasoning and philosophical principles to explain the natural world. He emphasized the importance of logic and believed that knowledge could be attained through contemplation and thought.

On the other hand, Galileo, an Italian physicist and astronomer, revolutionized the scientific method by advocating for empirical observation and experimentation. He conducted experiments and made accurate measurements to understand the natural phenomena. Galileo's reliance on empirical evidence and the scientific method laid the foundation for modern scientific inquiry.

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Answer:

cbccfggssdaffzftyrd

Nuclear engineer Meena Mutyala argues that nuclear power is an environmentally benign technology, operating with essentially no emissions.

How does nuclear power function and what is it?

The fission of uranium nuclei, also known as nuclear fusion, is the source of nuclear energy. As a result, heat is produced, which turns into steam, which then turns into energy in a turbine generator. Nuclear energy facilities don't release greenhouse gas emissions because they don't burn fuel.

New applications for nuclear electricity or material are being studied by nuclear engineers. To help in the development of preventive steps, they investigate nuclear accidents and analyze the data. Some examine the viability of various approaches to using, controlling, and recovering nuclear material.

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The process that always results in an increase in the energy of a system is:

the system gains heat and has work done on it by the surroundings.

What is Work Done?

Work done is the energy transferred to or from an object by means of a force acting on it, causing it to move a certain distance in the direction of the force. The amount of work done is defined as the product of the magnitude of the force and the distance moved by the object in the direction of the force. Work is a scalar quantity, and its unit is joule (J) in the SI system of units. Work can be positive, negative, or zero depending on the direction of the force and the direction of the displacement of the object.

When heat is added to a system, the internal energy of the system increases, which results in an increase in its energy. Similarly, when work is done on a system, it also results in an increase in its energy. Therefore, when both heat is added to a system and work is done on it by the surroundings, the energy of the system increases. This is because the system gains energy from both heat and work.

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The amount of work a machine can do because of an object's kinetic and potential energy is called mechanical energy. Mechanical energy is the sum of an object's kinetic energy, which is the energy due to its motion, and its potential energy, which is the energy it possesses because of its position or condition.

To understand this concept, let's consider an example. Imagine a roller coaster on top of a hill. As the roller coaster starts moving down the hill, its potential energy decreases because it is losing height. However, its kinetic energy increases because it is gaining speed. At the bottom of the hill, the roller coaster has minimal potential energy but maximum kinetic energy.

The total mechanical energy of the roller coaster remains constant throughout the ride, demonstrating the conservation of energy. This principle applies to other machines as well, such as a pendulum or a swinging door. By understanding and utilizing the mechanical energy of objects, machines can perform useful work.

In summary, the amount of work a machine can do due to an object's kinetic and potential energy is known as mechanical energy. It encompasses both the object's motion-related energy and its position-related energy.

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Answer:

ΔV = 9

Explanation:

Given your speed data, we can simply think about it graphically and calculate the slope. When your data is layed out on a graph there is a linear relationship, so it has a constant slope. We can calculate slope easily with your data using y2-y1/x2-x1 so 18-9/2-1. This gets us a constant change in velocity (slope) of 9.

The energy released by the system is 686 kJ and the energy used is 100 kJ, so the change in internal energy of the system is 586 kJ.

The change in internal energy of the system is equal to the difference between the energy released and the energy used.

Internal energy is the sum of all potential and kinetic energies of the molecules in a system. Potential energy is the energy stored in the system due to the positions and interactions of its particles, while kinetic energy is the energy associated with the motion of the particles.

When energy is released, the internal energy of the system increases, and when energy is used, the internal energy of the system decreases. In this case, energy was released and used, but the release was greater than the use, so the change in internal energy was an increase of 586 kJ.

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The two subfields of psychology that are similar and involve diagnosing and treating mental disorders are Clinical psychology and the Counseling psychology. Therefore, the correct answer is:  C).

Clinical psychology and Counseling psychology. Both of these subfields involve the assessment, diagnosis, and treatment of mental health disorders, although they may differ in their focus and approach. Clinical psychology tends to the focus on more severe mental health issues, such as schizophrenia and the bipolar disorder, while Counseling psychology tends to focus on a wider range of issues, such as stress management, relationship problems, and career counseling. Hence correct answer is : C) .

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Answer:

They are all composed of gases.

Explanation:

The inner planets are mainly composed of types of rock. The surface and interior is rocky but the atmosphere is composed of gases. The outer planets happen to be composed mainly of gas, or in other terms, elements. The two primary elements that make up these planets are hydrogen and helium. Because the inner planets are made up of primarily, they have given the nickname the "Terrestial Planets" and the outer planets are called "Gas Giants" because of their gas (elements) composed atmospheres and overall interiors.

Answer: A: they are composed of gas

Explanation:

The amount of energy available per kilogram of the resource is called energy density.

Energy density is the amount of energy stored in a particular mass of a substance. Energy per unit volume or energy per unit of mass are both ways to express energy density. A high energy density means that more energy is stored in the same amount of mass or volume. Materials with a high energy density are regarded as ideal for producing energy.Energy density is determined by the mass and chemical structure of the material, which affects the potential amount of energy that can be extracted from it. Fossil fuels, for example, have a high energy density since they contain a large amount of potential energy that can be extracted via combustion. However, renewable energy sources like wind and solar have a lower energy density, and their potential energy output is determined by environmental conditions like wind speed and sunlight intensity.

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The unit tangent vector T(t) for the curve defined by r(t) = (e², 2t, e) at t = 2 is \(\[T(2) = \left(\frac{e^2}{\sqrt{e^4 + 16 + e^2}}, 4, e\right)\]\). The unit normal vector N(t) for the curve at \(\[N(2) = \left(\frac{-2e^2}{\sqrt{4e^4 + 1}}, 1, 0\right)\]\).

The normal acceleration ar at \(\[ar(2) = \frac{\sqrt{4e^4 + 1}}{\sqrt{e^4 + 16 + e^2}}\]\). The tangential acceleration at t = 2 is aT(2) = 0 since the curve is defined as a straight line and has no curvature.

To find the unit tangent vector T(t), we take the derivative of the position vector r(t) with respect to t and normalize it by dividing by its magnitude. The derivative of \(\[T(t) = \frac{(e^2, 4, e)}{\sqrt{e^4 + 16 + e^2}}\]\).

To find the unit normal vector N(t), we differentiate T(t) with respect to t and normalize the resulting vector. The derivative of T(t) is (0, 0, 0), which means the curve is a straight line. Therefore, N(t) is constant and given by \(\[N(t) = \frac{(-2e^2, 1, 0)}{\sqrt{4e^4 + 1}}\]\).

The normal acceleration ar at t = 2 is the magnitude of the derivative of T(t) with respect to t, which simplifies to \(\[\frac{\sqrt{4e^4 + 1}}{\sqrt{e^4 + 16 + e^2}}\]\).

Since the curve is a straight line, there is no change in the direction of the velocity vector, and therefore, the tangential acceleration aT is zero.

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a. The electric potential at any point x along the axis of the hollow cylinder is V = (kQ/2πε₀) * ln[(x + √(x² + R²))/(x - √(x² + R²))].

b. The potential at any point x along the axis of the cylinder reduces to the potential on the axis of a ring of charge with radius R.

c. The electric field along the axis of the hollow cylinder is E = (kQx/4πε₀) * [(x² - R²)/((x² + R²)√(x² + R²))].

a. To calculate the electric potential at any point x along the axis of the hollow cylinder, we consider a small ring element on the surface of the cylinder at distance r from the axis.

The potential contribution from this ring element can be calculated as dV = (kQ/4πε₀) * (1/r) * dr, where k is the electrostatic constant, Q is the total charge on the cylinder, ε₀ is the permittivity of free space, and dr is an element of the length of the ring.

Integrating this expression over the entire length of the cylinder, we can obtain the electric potential at any point x along the axis.

The resulting expression for the electric potential is V = (kQ/2πε₀) * ln[(x + √(x² + R²))/(x - √(x² + R²))], where R is the radius of the cylinder.

b. When the length of the cylinder (L) is much smaller than its radius (R), i.e., L≪R, the result in part A simplifies. In this case, we can approximate the hollow cylinder as a ring of charge with radius R.

As the length of the cylinder becomes negligible compared to its radius, the contribution of each point on the cylinder's surface to the potential at a point on the axis becomes approximately equal.

Therefore, the potential at any point x along the axis of the cylinder reduces to the potential on the axis of a ring of charge with radius R.

c. To find the electric field at any point x along the axis of the hollow cylinder, we can differentiate the electric potential obtained in part A with respect to x. The electric field, E, is then given by E = -dV/dx.

Differentiating the potential expression from part A and simplifying, we find that the electric field along the axis of the hollow cylinder is E = (kQx/4πε₀) * [(x² - R²)/((x² + R²)√(x² + R²))].

The concept of electric potential and electric fields plays a fundamental role in understanding the behavior of charges and their interactions.

The potential at a point in an electric field determines the work done to move a unit positive charge from infinity to that point.

The electric field, on the other hand, describes the force experienced by a charge at a given point.

Understanding the potential and field of complex charge distributions, such as the hollow cylinder, allows us to analyze and predict the behavior of charges in various systems and applications, including electrical circuits, capacitors, and particle accelerators.

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