a block has a mass of 15 kg is pulled by ahorizpntal force of 47 n what is the coefficient of friction

Answer:

The answer is below

Explanation:

Distance is a measurement of how far apart two points are. Distance is a scalar quantity, i.e. it has magnitude and no direction.

Total distance traveled = distance traveled north + distance traveled east + distance traveled south

Total distance traveled = 100 + 50 + 60 = 210 meters

Displacement is the shortest distance between the starting and end points.

displacement² = 50² + (100 - 60)²

displacement² = 2500 + 1600

displacement = 64 meters

The displacement of the journey is vector, because displacement is a vector quantity.

The maximum speed of the photoelectron emitted from the surface is approximately 1130 km/s.

v = (2 * (E - W) / m)\(^(1/2)\)

where E is the energy of the incident photon, W is the work function of the surface, and m is the mass of the electron.

E = hc/λ = (6.626 x \(10^{-34\)J.s) * (3.00 x \(10^8\) m/s) / (174 x \(10^{-9\) m) = 1.20 eV

Next, we plug in the values of E = 1.20 eV and W = 5.32 eV into the formula above, and convert the result to km/s:

v = (2 * (1.20 eV - 5.32 eV) / (9.11 x \(10^{-31\) kg))\(^0.5\) = 1.13 x \(10^6\) m/s = 1130 km/s

Energy is a fundamental concept in physics that refers to the capacity of a system to do work or cause a change. It comes in different forms such as mechanical, thermal, electrical, chemical, and nuclear. Energy cannot be created nor destroyed, only converted from one form to another. This principle is known as the law of conservation of energy.

Energy plays a crucial role in every aspect of our lives, from powering our homes and vehicles to fueling our bodies. Without energy, life as we know it would not be possible. The use of energy has been linked to environmental concerns such as climate change and air pollution, leading to a growing interest in renewable energy sources such as solar, wind, and hydropower.

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The sympathetic and parasympathetic nerve pathways are two divisions of the autonomic nervous system. These pathways are responsible for regulating involuntary functions such as heart rate, digestion, and respiratory rate.

In order for these pathways to function, a stimulus is needed to trigger a response. This stimulus can be internal or external. Once the stimulus is detected, a nerve impulse is sent through a sensory neuron to the central nervous system where it is processed by an interneuron.

The processed signal is then sent through a preganglionic motor neuron to either a chain ganglia or cranial nerve ganglia, depending on the location of the effector organ. From here, the signal is transmitted to a postganglionic motor neuron which sends the signal to the effector organ. The effector organ then responds to the signal, either increasing or decreasing its activity depending on the pathway that is activated.

Here is a diagram that shows the direction of the nerve impulse along the pathway:
[Insert diagram here]
To help you understand the pathway of the nerve impulse, here are some pictures and titles that describe each step of the process:

1. Stimulus Detection: This image shows an example of an external stimulus being detected by a sensory neuron.

2. Interneuron Processing: This image shows an interneuron in the central nervous system processing the signal received from the sensory neuron.

3. Preganglionic Motor Neuron: This image shows a preganglionic motor neuron sending the signal to the chain or cranial nerve ganglia.

4. Postganglionic Motor Neuron: This image shows a postganglionic motor neuron transmitting the signal to the effector organ.

5. Effector Organ Response: This image shows the effector organ responding to the signal received from the postganglionic motor neuron.

Now, for the reactions to the motor impulse. The sympathetic and parasympathetic pathways have different effects on the effector organs. Here are three possible reactions for each pathway:

Sympathetic Pathway:
1. Increase in heart rate
2. Dilated pupils
3. Decrease in saliva production

Parasympathetic Pathway:
1. Decrease in heart rate
2. Constricted pupils
3. Increase in saliva production.

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Force of air and gravitational force are acting on the ball when launched from the slingshot.

When a ball is launched from a slingshot, during its travel force of air as well as gravitational force are acting on the ball because there is air which moves opposite to the motion of a ball whereas the force of gravity attracts the ball downward.

The force of air slows down the motion of the ball while on the other hand, the force of gravity brings the ball to the ground due to attraction. If these two forces are not present then the ball continues its motion forever so we can conclude that force of air and force of gravity are acting on the ball when launched from the slingshot.

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Without fusion reactions in the Sun, the interior radiation pressure that counteracts the gravitational force would cease. This would cause the core to collapse inward due to the gravitational force, increasing the pressure and temperature in the core. As a result, the outer layers of the Sun would expand outward, causing the Sun to become a red giant.

In this scenario, the correct option would be: Without interior radiation pressure, the Sun will contract under its own weight about three times in about a thousand years.

As the Sun contracts, its core temperature and pressure will continue to increase until helium atoms are able to fuse, which will release energy and cause the outer layers of the Sun to expand outward again. However, since the Sun has already burned most of its hydrogen fuel, this phase of fusion will only last for a short time before the Sun eventually dies.

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When a current flows through a wire, it creates a magnetic field around the wire. The strength of this magnetic field decreases as the distance from the wire increases. In this scenario, we have a long straight wire carrying a current of 12 A, and a point P located at a perpendicular distance of 0.4 m from the wire in the plane of the page. To determine the magnetic field at point P, we can use the formula B = μ0I/2πr, where B is the magnetic field strength, μ0 is the permeability of free space, I is the current, and r is the distance from the wire. Substituting the given values, we get B = (4π x 10^-7 N/A^2)(12 A)/(2π x 0.4 m) = 9.5 x 10^-6 T. Therefore, the magnetic field at point P is 9.5 x 10^-6 T.

A long straight wire carries a current of 12 A in the plane of the page. Point P is also in the plane of the page, located at a perpendicular distance of 0.4 m from the wire.

To analyze the effect of the current on point P, we can determine the magnetic field at that point. For a long straight wire, the magnetic field (B) is given by the formula:

Where B is the magnetic field, μ₀ is the permeability of free space (4π × 10⁻⁷ T·m/A), I is the current (12 A), and d is the perpendicular distance from the wire (0.4 m).

Substituting the values, we have:

B = (4π × 10⁻⁷ T·m/A * 12 A) / (2 * π * 0.4 m)

Simplify the expression:

B ≈ 6 × 10⁻⁶ T

So, the magnetic field at point P due to the current in the straight wire is approximately 6 × 10⁻⁶ T.

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The statement that is true during phonation is the last option, the speaker creates an increase in the air pressure below the vocal folds, which exerts a force on the open vocal folds. During phonation, the process of producing sound with the vocal folds, the speaker exhales and generates airflow from the lungs.

The airflow passes through the vocal folds, which are initially open. By creating an increase in the air pressure below the vocal folds, the speaker exerts a force on the open vocal folds, causing them to come together and close.

When the vocal folds begin to close, the air pressure between them starts to increase. This increase in air pressure helps maintain the closure of the vocal folds during phonation, allowing them to vibrate and produce sound.

The other statements mentioned in the question are not accurate or relevant to the process of phonation. Changes in air pressure in the middle ear and the pressure against the trachea are not directly involved in the closure and vibration of the vocal folds during phonation. The primary mechanism for vocal fold closure and vibration is the control of airflow and air pressure by the speaker's respiratory system and vocal tract.

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The work done by the turbine per unit mass of air is given by,

\(W = c p (T 3 - T 4 ) \\= c p (T 2 - T 1 )Here, \\T1 = 283 K, \\T2 = T1 + 200 \\= 483 K, \\T3 = T2 + 722 \\= 1205 K, \\T4 = T1 + 273 \\= 556 Kc \\p = 1.005 kJ/(kg K)\)

Thus, the work done by the turbine is,

\(W = 1.005 (1205 - 556) \\= 680.745 kJ/kg\)

The fuel used by the turbine has a heating value of 43 MJ/kg. Thus, the fuel required per unit of work is given by, Fuel per unit of work \(= 43 × 10⁶ / 680.745\\ = 63034.8 kJ/kg\)

Answer: The fuel flow rate required for 1 MW output is 0.026 kg/s. The rate in kg/s at which fuel must be burned for each MW of output from the power plant is 0.026 kg/s.

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Answer: In the Newton's ring experiment, the diameter of the 4th dark ring is 0.30 cm and the diameter of the 10th dark ring is 0.62 cm. We can use this information to find the diameter of the 15th dark ring and calculate the wavelength of the light.

Explanation:

In the Newton's ring experiment, the diameter of the 4th dark ring is 0.30 cm and the diameter of the 10th dark ring is 0.62 cm. We can use this information to find the diameter of the 15th dark ring and calculate the wavelength of the light.

a) To find the diameter of the 15th dark ring, we can use the formula for the diameter of the nth dark ring:

d_n = sqrt(n * λ * R)

where d_n is the diameter of the nth dark ring, n is the order of the ring, λ is the wavelength of the light, and R is the radius of curvature of the lens.

Since we want to find the diameter of the 15th dark ring, we can substitute n = 15 into the formula and solve for d_15:

d_15 = sqrt(15 * λ * R)

b) To calculate the wavelength of the light, we can use the formula:

λ = (\(d_10^2 - d_4^2\)) / (\(10^2 - 4^2\))

where d_10 is the diameter of the 10th dark ring and d_4 is the diameter of the 4th dark ring.

Substituting the given values, we have:

λ = (\(0.62^2 - 0.30^2\)) / (\(10^2 - 4^2\))

Simplifying this expression will give us the value of the wavelength of the light used in the experiment.

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The alpha particles are capable of alternating the mass and atomic numbers in the atoms which is responsible for transmutation. This occurs in nuclear reacting.

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Working alone or alone gives you the luxury of not having to wait or require someone's approval to complete your work, and you can work quickly.

Famous Tennis As his player Arthur Ashe once said success is a journey, not a destination. Actions are often more important than results. So you may not even need to reach your goals in order to be successful. Proverbs are an integral part of African culture. It has been passed down from generation to generation for centuries and is still widespread today and an integral part of everyday language.

Proverbs are used to explain ideas support discussions and convey messages of inspiration comfort congratulation, and advice. I think the journey is more important than the destination. Achieving our goals is always great but the way we reach them shows who we are and what we are capable of. If we are rewarded those rewards don't change our moods much.

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The genotypes of the three F2 classes is FTFT, F, FFT (in order left to right).

The forked allele is F, while the twist allele is FT. They are homozygous because, according to what we know, there exist pure lines. Therefore, FF and FTFT are the parents.

As observed in the figure, the F1 generation is both twisted and forked, indicating the codominant alleles (both are expressed).

Three different flower kinds may be found in the F2, two of which match the parental and one of which matches the F1 in terms of twisting, forking, and both.

The left-to-right order has been twisted and forked. Twisted is the genotype FTFT, while forked is the genotype FF, as far as we are aware. Both phenotypes would carry a copy of each allele, making FFT possible.

Your question is incomplete but most probably your full question was

You decide to designate the twist allele as FT to distinguish it from the forked allele F. Using the following allele symbols, identify the genotypes of the three F2 classes in Part C by dragging one label to each class. Labels can be used once, more than once, or not at all.

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The force that acts on all objects, all the time on Earth is gravitational force.

The force that surface exert on an object perpendicularly is normal reaction.

The force due to gravity on object's is calculated by applying Newton's second law of motion as follows;

F = mg

where;

The force that surface exert on an object perpendicularly is normal reaction.

Thus, the force that acts on all objects, all the time on Earth is gravitational force.

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The scientific concept that the student most likely used to arrive at his conclusion is Newton's laws of motion.

Newton's Laws of motion - Newton's Laws of motion consists of 3 important Laws. The three laws of motion help us understand how objects behave when standing still, when moving and when forces act upon them.

according to Newton's 2nd laws:

F = ma (where m is mass and a is acceleration of the object)

the subject applied same force on both the balls, but the ball 2 travelled greater distance.

F = M1a1

M1 = F/a1

and M2 = F/a2

and S = 1/2at2 if initial velocity is 0.

so, S is directly proportional to a

so, M1 = F/S1

and M2 = F/S2

Since, S2 is greater than S1, so M2 is less than M1 because distance is inversely proportional to mass of the object.

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The type of light that best illustrates the photoelectric effect is (c) ultraviolet light. Hence, the correct answer is option c).

Photoelectric effect refers to the emission of electrons from a metallic surface when a light of suitable frequency shines on the surface of the metal. The phenomenon, first noticed by Heinrich Hertz in 1887, was explained in 1905 by Albert Einstein when he used Planck's hypothesis to illustrate that light energy is carried in discrete quantized packets to describe the photoelectric effect.

In relation to photoelectric effect, the type of light that best illustrates it is ultraviolet light. This is because ultraviolet light has a high enough frequency to remove electrons from the metal surface. As a result, electrons that absorb photons with enough energy from the ultraviolet region of the electromagnetic spectrum will be ejected from the metal, causing the photoelectric effect, and producing an electric current.

When light is shone on a metallic surface, an electric current is produced, which is called the photoelectric effect. The photoelectric effect is caused by the emission of electrons from a metal surface that is exposed to a light of suitable frequency. The energy of the electrons depends on the frequency of the light, and the intensity of the light determines the number of electrons ejected from the surface.

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In order to calculate a planet's orbital period, we must know the dimensions of its orbit. The correct answer is C.

To calculate a planet's orbital period, we need to know the dimensions of its orbit, specifically the semi-major axis. The semi-major axis is the average distance between the planet and its parent star (assuming a circular or nearly circular orbit). The orbital period of a planet is determined by its distance from the star and the mass of the star.

The tilt of the planet's axis (option A) affects the planet's seasons but does not directly impact its orbital period. The radius of the planet (option B) is not directly related to its orbital period either. The velocity of the planet (option D) can vary along its orbit, but it is not sufficient on its own to calculate the orbital period. Hence the correct answer is C.

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Answer:

40 Kpa

Explanation:

150 cm2 = 0.015 m2

\(p \: = \frac{mg}{ a} = 40000\)

Answer:

Seismic waves are mechanical waves because they travel through the medium of the Earth.

Explanation:

Answer:

Kinetic energy

Explanation:

Kinetic energy is the energy of motion, and the arrow is in motion.

Explanation:

The frequency of the engine is given by :

\(f=\dfrac{rpm}{60}\)

We have, the engine increases its performance from zero to 2700 rpms.

Frequency,

\(f=\dfrac{2700}{60}\ \text{cycles per second}\\\\f=45\ \text{cycles per second}\)

The time period of the engine is given by :

T = f/f

So,

\(T=\dfrac{1}{45}\ s\\\\T=0.023\ s\)

Hence, the required frequency and the period is 45 cycles/second and 0.023 seconds respectively.

High pressure points on a sound wave are represented by regions called "compressions," where a sound wave, compressions correspond to areas where the air molecules are densely packed together, resulting in an increase in air pressure. 

When a sound wave propagates through a medium, it creates a series of compressions and rarefactions. Compressions are characterized by regions of increased air pressure, while rarefactions are regions of decreased air pressure where the air molecules are more spread out. In graphical representations of sound waves, compressions are typically depicted as peaks or crests, where the wave amplitude reaches its maximum value. 

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Answer: C. It includes factual information supported by other sources

Explanation:

:) its really obvious tbh w you

gamertag: itzmamas1k

Answer:

Explanation:

its what he or she said i hope!

Answer:

a

Explanation:

To develop a sampling plan for LSI circuit chips, an electronics firm should consider the AQL (Acceptable Quality Level) of 0.15 specified by the LSI manufacturing department and the LTPD (Lot Tolerance Percent Defective) of 0.40 acceptable by the assembly department.

The sampling plan should involve selecting a representative sample of LSI circuit chips from the manufacturing department and conducting tests to determine their quality. The AQL of 0.15 means that the manufacturing department will tolerate no more than 15% defective chips in a given sample. Therefore, the sampling plan should ensure that the sample size is large enough to provide statistical confidence in determining the quality level of the chips.

The assembly department's LTPD of 0.40 indicates the maximum allowable defective rate for the chips after assembly. This implies that the sampling plan needs to consider the overall quality of the chips and their performance in the final analog devices.

To execute the sampling plan, one could follow these steps:

1. Determine the appropriate sample size based on statistical calculations, taking into account the desired confidence level and the acceptable quality levels specified by both departments.

2. Randomly select the required number of LSI circuit chips from the manufacturing department.

3. Perform thorough testing and inspection on the selected chips to identify any defects or anomalies.

4. Calculate the defect rate based on the number of defective chips found in the sample.

5. Compare the defect rate with the specified AQL and LTPD to assess if the chips meet the required quality standards.

6. Provide feedback to the manufacturing and assembly departments based on the results, taking necessary actions if the quality standards are not met.

By following this sampling plan, the electronics firm can ensure that the LSI circuit chips meet the required quality standards and are suitable for use in analog devices.

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Answer:

To be neutral

Explanation:

Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Explanation:

Because they are neutral, so they help hold the nucleus together.

Mike is swinging from a vine. The net force on Mike will be vertical upward at the bottom of the swing.

A centripetal force is a force that causes a body to move in a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the path's instantaneous center of curvature.

Mike is on a swing, which means he must take a circle course. In a circular motion, centripetal force acts towards the motion's center, allowing it to travel in that direction.

As a result, the net force at each point on the circular part will be towards the center. The direction of net force will be vertical upward at the bottom position.

Therefore, the net force on Mike will be vertical upward at the bottom of the swing

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It would take 372 seconds to reach a speed of 305 m/s.

The speed of any object is described as the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time.

Speed is thus a scalar quantity

We will use formula for acceleration to calculate  or find the final velocity after a certain time t:

We have that v = v0 + at,

where vo is the initial velocity.

Finding in terms of t

t = (v - v0) / a = (305 - 2) / 0.82 = 372 seconds

Therefore, it would take 372 seconds to reach a speed of 305 m/s.

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Answer:

In MeV: 10.674 × 10^(34) MeV

In TeV: 10.674 × 10^(28) TeV

Explanation:

We are given that;

1.78 × 10^(-36) kg = 1 eV

We are now told that the blue whale has an average mass of 1.90 × 10^(5) kg

Thus, converting this mass of the blue whale to eV, we have;

(1.90 × 10^(5) × 1)/(1.78 × 10^(-36)) = 10.674 × 10^(40) eV

Now, converting to mega electron volts;

From conversions;

1 eV = 10^(-6) MeV

Thus,

10.674 × 10^(40) eV will be;

(10.674 × 10^(40) × 10^(-6))/1 = 10.674 × 10^(34) MeV

Also, converting to Tera electron Volts;

From conversion, we know that;

1 eV = 10^(-12) TeV

Thus;

10.674 × 10^(40) eV will give;

(10.674 × 10^(40) × 10^(-12))/1 = 10.674 × 10^(28) TeV

Subduction zones are associated with convergent boundaries.

option C is the correct answer.

Subduction zones are plate tectonic boundaries where two plates converge or meet together, and one plate is pushed below the other plate due to underlying forces.

The following are characteristics of subduction zones;

Subduction zones is usually associated with some geo-hazards, such as;

Thus, we can conclude that the main feature or characteristics of subduction zones is convergent boundaries resulting from the convergent plates.

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Answer:

The heat from the water deforms the sides because it melts the plastic