The nervous system has two distinct branches. They are the:

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Answer:

Tension in back wire = 24.5 N

Explanation:

let the tension in the back wire be Tₒ

let the tension in the front wire be T

Applying static equilibrium in the vertical direction, we have:

T + Tₒ = (5 × 9.8) + (2.5 × 9.8)

T + Tₒ = 73.5

Where Tₒ = (2.5 × 9.8) = 24.5 N

Thus, Tension in back wire = 24.5 N

The tension in the back wire equals 24.5 N.

We can arrive at this answer with the static equilibrium formula, for that, let's consider that the tension in the back wire is represented by the letter "t," while the tension in the front wire is represented by the letter "T."

Therefore, we can use the following formula:

\(t= W*g\\t= 2,5*9.8\\t= 24.5 N\)

In this case, the letter "W" refers to the tool weight, while the letter "g" refers to gravity.

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The magnitude of the initial acceleration of the object is 4.2 m/s².

The tension in the string once the object starts moving is 13.65 N.

The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;

F(net) = ma

m₂g - μm₁g cosθ = a(m₁ + m₂)

where;

(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)

33.5 = 8a

a = 33.5/8

a = 4.2 m/s²

The tension in the string once the object starts moving is calculated as;

T = m₁a

T = 3.25 x 4.2

T = 13.65 N

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Answer:

b. he inferred the orbits were circular

Explanation:

Johannes Kepler was a German astrologer and astronomer who, successfully, defined the orbit. According to his first law, the planets moved in elliptical orbits. However, before this, he believed that the universe was circular just as Copernicus did. In this sense, he also thought that the orbits of the planets were circular. Later did he realize the truth after observing the movements of the planets in relation to their distances from the Sun and the total amount of time needed to complete their revolutions around it.

Answer:

B) He inferred the orbits were circular

and I also think it is A) He presumed Copernicus was correct.

Explanation:

I have this question right now, and it is a multiple choice question, so...yeah

...I have no dang clue what the answer is, so if this is wrong, I'm sorry.

Answer:

so you have your boxes go by tens on the x-axis okay which is the one going straight up then the second number goes by 5's is your y-axis. 30,6 so 30 is your x and 6 is your y. start at 0,0 which is the little corner piece. find 30 on x and then go over 6 and that's it!

Explanation:

Answer:

Polishing the rough surface.

Oiling or lubricating with graphite or grease the moving parts of a machine.

Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and allow smooth movement as rolling friction is less than sliding friction.

Explanation:

Answer:

Friction is a force that slows down the motion of a moving object. ... Eventually, friction and gravity will work together to stop the motion of the slide. Gravity is a force that pulls two objects toward each other because of their mass. Mass is the measurement of the amount of material (matter) that makes up an object.

My science notebook is drawn to the desk's surface by gravity. Unless pressing the book is hard enough to overcome static friction, friction prevents it from slipping off the desk's surface.

The amount of power required to move my pencil over the page to write depends on how much friction there is between my pencil and the paper.

Rock, soil, and debris will continue to slide once it starts until the friction between the material and the ground slows it down. Gravity and friction will eventually combine to stop the slide's momentum.

Therefore, due to their mass, two objects are drawn toward one another by the force of gravity, so forces of gravity and friction affect the motion.

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Answer:

The maximum speed a subway train can attain between stations is 32.93 m/s.

Explanation:

Given;

maximum tolerable acceleration = 1.39 m/s²

distance between subway train, d = 780 m

The distance available to accelerate between stations = ¹/₂ x 780 m = 390 m

Apply the following kinematic equation to determine the maximum speed;

v² = u² + 2ad

v² = 0 + 2ad

v² = 2(1.39)(390)

v² = 1084.2

v = √1084.2

v = 32.93 m/s

Therefore, the maximum speed a subway train can attain between stations is 32.93 m/s.

Answer: An object undergoing a constant acceleration can have its motions be described by the kinematic equations. These equations relate the position of the particle, its velocity, acceleration, and time.

Explanation:

Answer:

vf^2=vo^2+2ay(y1-y0)

Explanation:

Answer:

Explanation:

Theoretical muzzle velocity is calculated based on various physical models and assumptions, such as the conservation of energy and momentum, the properties of the propellant and barrel, and other factors that can affect the velocity of the projectile as it exits the muzzle of the firearm. However, in practice, there can be many factors that can influence the actual velocity of the projectile, which can result in a measured muzzle velocity that is higher than the theoretical value. Some possible reasons for this discrepancy include:

Variation in propellant burn rate: Theoretical models assume a constant burn rate for the propellant, but in practice, there can be variations in the rate at which the propellant burns due to differences in temperature, humidity, and other factors. This can affect the velocity of the projectile as it exits the muzzle.

Barrel condition: Theoretical models assume a perfectly smooth, straight barrel, but in practice, barrels can have imperfections such as rough spots or bends that can affect the velocity of the projectile as it travels through the barrel.

Environmental factors: Theoretical models assume ideal conditions, but in practice, there can be factors such as wind, temperature, and humidity that can affect the velocity of the projectile as it travels through the air.

Measurement errors: Measuring the muzzle velocity of a projectile can be challenging, and errors in measurement can result in a measured velocity that is higher than the actual value.

Human error: Human factors such as shooter error, inconsistency in handling and loading the firearm, and other factors can also contribute to discrepancies between theoretical and measured muzzle velocities.

Overall, while theoretical muzzle velocity can provide a useful estimate of the velocity of a projectile exiting a firearm, there are many factors that can influence the actual velocity in practice, leading to measured velocities that are higher than the theoretical value.

The spring constant k based on the information is 12.0 N/m.

From the information, a spring stretches 0.294-m when a 0.360-kg mass is gently suspended from it as in Fig. 11–3b. The spring is then set up horizontally with the 0.431-kg mass resting on a frictionless table.

The spring constant k is the force required to stretch or compress the spring by a unit distance. In this case, the spring is stretched by 0.294 m when a 0.360 kg mass is suspended from it.

This means that the force exerted by the spring is equal to the weight of the mass, which is 0.360 kg x 9.8 m/s^2 = 3.53 N.

Therefore, the spring constant k is:

= 3.53 N/0.294 m

= 12.0 N/m.

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Answer:

x-component = 7.1

Explanation:

x-component = 9cos38 = 7.09 =7.1

Answer:

7.1

Explanation:

use cos

Answer:

4) do the x and y components

r = sqrt( (50)^2 + (34.6)^2 )

= 60.8

theta = tan-1 (34.6/50)

= 34.7 degrees

5) equal and opposite

r=60.8

theta =34.7 +180

=214.7 degrees

See the answer

Explanation:

Answer:

4.  |R| = 60.8 N (3 s.f.)

    θ = 34.7° (3 s.f.) relative to the x-axis

5.  |F| = 60.8 N (3 s.f.)

    θ = 214.7° (3 s.f.) relative to the x-axis

Explanation:

\(\textsf{Force}: \quad F=xi+yj\)

\(\textsf{Magnitude}: \quad |F|=\sqrt{x^2+y^2}\)

Given:

\(|F_1|=30\;\sf N\)

\(|F_2|=40\;\sf N\)

Using the given magnitudes and the force diagram:

\(F_1=30i+0j\)

\(\begin{aligned}F_2&=(40 \cos 60^{\circ})i+(40 \sin60^{\circ})\\ &=20i+20\sqrt{3}j\end{aligned}\)

The resultant force is the sum of all forces acting on an object.

To find the resultant force, add the corresponding components of the forces:

\(\begin{aligned}\implies R& =(x_{F_1}+x_{F_2})i+(y_{F_1}+y_{F_2})j\\ &=(30+20)i+(0+20\sqrt{3})j\\& = 50i+20\sqrt{3}j\end{aligned}\)

Therefore the magnitude of the resultant force is:

\(\begin{aligned}\implies |R|&=\sqrt{50^2+(20\sqrt{3})^2\\& = \sqrt{2500+1200}\\& = \sqrt{3700}\\ & = \sqrt{100 \cdot 37}\\ & = \sqrt{100}\sqrt{37}\\ & = 10\sqrt{37}\\ & = 60.8\; \sf N\;(3\:s.f.)\end{aligned}\)

The direction of the resultant force is:

\(\begin{aligned}\implies \theta & = \tan^{-1}\left(\dfrac{y}{x}\right)\\\theta & = \tan^{-1}\left(\dfrac{20\sqrt{3}}{50}\right)\\\theta & =34.71500395...^{\circ}\\\theta & =34.7^{\circ}\; \sf (3 \:s.f.)\end{aligned}\)

An object is in equilibrium if the resultant force on it is zero.

Therefore, the magnitude of the equilibriant force is equal to the magnitude of the resultant force:  60.8 N (3 s.f.).

The direction of the equilibriant force is opposite to the resultant force, so its components will be:

\(F=-50i-20\sqrt{3}j\)

Therefore, it will be in Quadrant III.

So the direction relative to the x-axis will be the same direction as the resultant force plus 180°:

\(\begin{aligned}\implies \theta &=180^{\circ}+34.7^{\circ}\\& = 214.7^{\circ}\; \sf (3 \:s.f.)\end{aligned}\)

The description that tells two processes that scientists think move Earth's lithospheric plates is convection in the mantle and pressure of magma on the edge of the plate.

The Earth's lithosphere is the rocky outer part of Earth which is made up of the brittle crust and the top part of the upper mantle.

The Earth's lithosphere deflects the convections and as the convections churn clockwise of anticlockwise, they drag the  lithosphere with it via friction an this is what is stipulated to cause tectonic plate movements.  

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Answer: convection in the mantle and pressure of magma on the edge of the plate

Explanation: I took the unit test

Answer:

Air pollutants produced by forest fires in one country are able to travel to neighboring countries because of the way air moves and circulates around the globe. The Earth's atmosphere is made up of a mixture of gases, including oxygen and carbon dioxide, which are capable of moving and circulating through the air. When pollutants, such as those produced by forest fires, are released into the atmosphere, they can be carried by wind and other atmospheric phenomena, allowing them to travel over long distances and affect other regions and countries. This is why air pollution from forest fires in one country can affect neighboring countries.

Net work done  on student B by the Ferris wheel in moving from the top to the bottom  is mathematically given as

net work done on A =0.

Generally the equation for the work energy theorem is mathematically given as

net work done on A = change in kinetic energy of A.

Where, angular velocity is constant.

change in kinetic energy = 0.

Hence, from work energy theorem,

net work done on A =0.

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For the roller coaster on a frictionless track:

a. The speed of the car at Point B can be determined using the principle of conservation of energy. The total mechanical energy (sum of kinetic energy and potential energy) remains constant in the absence of external forces like friction. Therefore, if there is no energy loss, the kinetic energy at Point A is equal to the kinetic energy at Point B.

Given that the speed at Point A is 5.0 m/s, the speed at Point B will also be 5.0 m/s.

Answer: A. 5.0 m/s

b. To find the height at which kinetic energy equals potential energy, we can set the equations for kinetic energy and potential energy equal to each other.

At Point A, the roller coaster has both kinetic energy and potential energy. The total mechanical energy is the sum of these two:

Initial mechanical energy at Point A = Kinetic energy at Point A + Potential energy at Point A

At Point B, the roller coaster will have kinetic energy and potential energy, but we want to find the height at which kinetic energy equals potential energy. Let's call this height "h."

Mechanical energy at Point B = Kinetic energy at Point B + Potential energy at Point B

Since the speed at Point B is the same as the speed at Point A (5.0 m/s), the kinetic energy at both points is the same.

Equating the mechanical energy at Point A to the mechanical energy at Point B:

Initial mechanical energy at Point A = Mechanical energy at Point B

Kinetic energy at Point A + Potential energy at Point A = Kinetic energy at Point B + Potential energy at Point B

Since the kinetic energy is the same at both points, simplify the equation:

Potential energy at Point A = Potential energy at Point B

The potential energy at any point is given by the formula mgh, where m is the mass, g is the acceleration due to gravity, and h is the height.

Therefore, at the height h between Points A and B, the potential energy equals the potential energy at Point A:

mgh = mghA

Since the mass and acceleration due to gravity are the same, cancel them out:

h = hA

This means that the height where kinetic energy equals potential energy is the same as the height at Point A.

Answer: The height between Points A and B where kinetic energy equals potential energy is 5.0 m.

c. To determine if the car will reach Point C, compare the potential energy at Point B with the potential energy at Point C. If the potential energy at Point B is greater than or equal to the potential energy at Point C, the car will reach Point C.

Potential energy at Point B = mghB

Potential energy at Point C = mghC

Given that the height at Point C is 8.0 m, compare the potential energies:

Potential energy at Point B ≥ Potential energy at Point C

mghB ≥ mghC

Since the mass (m) and acceleration due to gravity (g) are constant, cancel them out:

hB ≥ hC

Therefore, for the car to reach Point C, the height at Point B must be greater than or equal to 8.0 m.

d. The minimum speed needed at Point A for the car to reach Point C can be determined by comparing the potential energy at Point A with the potential energy at Point C. If the potential energy at Point A is greater than or equal to the potential energy at Point C, the car will have enough energy to reach Point C.

Potential energy at Point A = mghA

Potential energy at Point C = mghC

Given that the height at Point A is 5.0 m, compare the potential energies:

Potential energy at Point A ≥ Potential energy at Point C

mghA ≥ mghC

Since the mass (m) and acceleration due to gravity (g) are constant, cancel them out:

hA ≥ hC

Therefore, for the car to reach Point C, the height at Point A must be greater than or equal to 8.0 m.

To summarize, for the car to reach Point C, the height at Point B must be greater than or equal to 8.0 m, and the height at Point A must also be greater than or equal to 8.0 m.

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The moment of inertia of the uniform cylindrical grinding wheel is 2,150 kgm².

What is the moment of inertia?

This refers to the angular mass or rotational inertia can be defined with respect to the rotation axis, as a property that shows the amount of torque needed for a desired angular acceleration or a property of a body due to which it resists angular acceleration. The unit is kgm².

From the question:

Mass,M =4.2kg

Radius, R=32Cm

The formula for calculating the moment of inertia for uniform cylindrical grinding wheel:

moment of inertia, I =1/2MR²

I =\(\frac{1}{2}\) * 4.2 * 32²

  =2,150.4 kgm²

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If the reflected wave has the same amplitude and orientation as the incident wave, it is because the wave experienced destructive interference.

option A.

Destructive interference occurs when waves come together so that they completely cancel each other out. When two waves destructively interfere, they must have the same amplitude in opposite directions.

So when a wave reflects off a certain boundary and the reflected wave has the same amplitude and orientation as the incident wave, it is because both waves interfere destructively.

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Answer:

The water has potential energy at the top of the waterfall and increasing kinetic energy as it falls.

Explanation:

Answer:

C.) X-Rays

B.) Focus

A.) Laser

B.) 38 x 10^-16 Joules

The average blood pressure in the brain will be higher than the average blood pressure in the feet. the average blood pressure in the brain will be lower than the average blood pressure in the feet.

When the elevator accelerates upward at \(10 ms^{-2}\), the blood pressure in the brain and feet of a person changes.

Similarly, when the elevator accelerates downward with the same acceleration, the blood pressure in the brain and feet of a person changes.

Let's discuss them one by one:Blood Pressure When Elevator Accelerates Upward at \(10 ms^{-2}\)

When the elevator accelerates upward at \(10 ms^{-2}\),  the blood pressure in the brain of a person increases, while the blood pressure in the feet of a person decreases.

This happens due to the gravitational force acting on the body.

Since the gravitational force on the head is greater than the gravitational force on the feet, the blood pressure in the brain increases while the blood pressure in the feet decreases.

Therefore, the average blood pressure in the brain will be higher than the average blood pressure in the feet.

Blood Pressure When Elevator Accelerates Downward at  \(10 ms^{-2}\) When the elevator accelerates downward at \(10 ms^{-2}\), the blood pressure in the brain of a person decreases, while the blood pressure in the feet of a person increases.

This also happens due to the gravitational force acting on the body. Since the gravitational force on the head is less than the gravitational force on the feet, the blood pressure in the brain decreases while the blood pressure in the feet increases.

Therefore, the average blood pressure in the brain will be lower than the average blood pressure in the feet.

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On particle q1, there is a net force of about +25.6 N, directed to the right.

We must take into account the electrostatic forces between particle q1 and the other two particles, q2 and q3, in order to calculate the net force on particle q1. Coulomb's Law describes the electrostatic force between two charged particles:

F = k * |q₁ * q₂| / r²

F is the force, k is the electrostatic constant (9 x 109 N m2/C2), q1 and q2 are the charges' magnitudes, and r is the distance separating them.

Let's first determine the force between q1 and q2:

F₁₂ = k * |q₁ * q₂| / r₁₂²

F₁₂ = (9 x 10^9 N m²/C²) * |(-29.6 μC) * (+37.7 μC)| / (0.630 m)²

F₁₂ = (9 x 10^9 N m²/C²) * (29.6 x 10^-6 C) * (37.7 x 10^-6 C) / (0.630 m)²

F₁₂ ≈ -7.45 N

The minus symbol denotes an attracting force between q1 and q2, pointing to the left.

Let's next determine the force between q2 and q3:

F₂₃ = k * |q₂ * q₃| / r₂₃²

F₂₃ = (9 x 10^9 N m²/C²) * |(+37.7 μC) * (-10.8 μC)| / (0.315 m)²

F₂₃ = (9 x 10^9 N m²/C²) * (37.7 x 10^-6 C) * (10.8 x 10^-6 C) / (0.315 m)²

F₂₃ ≈ +33.05 N

Positively directed to the right, the force between q2 and q3 is shown by the positive sign.

We must now add all the forces in order to determine the net force on q1:

Net force = F₁₂ + F₂₃

Net force ≈ -7.45 N + 33.05 N

Net force ≈ +25.6 N

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Answer:

Explanation:

A) The output force required to lift a 15 kg object would be equal to the weight of the object, which is given by:

Output force = Weight of object = m * g

where m is the mass of the object and g is the acceleration due to gravity. Assuming that g is equal to 9.81 m/s^2, we have:

Output force = 15 kg * 9.81 m/s^2 = 147.15 N

Therefore, the output force required to lift a 15 kg object would be 147.15 N.

B) In this case, the input force is the force that you are pushing down with the lever, which is given as 20 N.

C) The mechanical advantage of the ramp is given by the ratio of the output force to the input force. In this case, the output force is the weight of the object (40 N) and the input force is the force that you are pushing with (10 N). Therefore, the mechanical advantage of the ramp would be:

Mechanical advantage = Output force / Input force = 40 N / 10 N = 4

So, the ramp multiplies your force by a factor of 4.

Note that in all of these calculations, we have assumed that the system is ideal and that there are no losses due to friction or other factors. In practice, these losses will reduce the mechanical advantage of the system and make it more difficult to lift or move objects.

Answer:

A meteorologist is a scientist who studies weather Explanation:

A meterologist is a scientist who studies the weather condition of an environment.

A meteorologist is a scientist that specifies in the act of understanding and forecasting the atmospheric condition or weather of the Earth surface.

The branch of science that studies weather is called meteorology and a meterologist uses several techniques and tools to explain weather.

Therefore, a meterologist is a scientist who studies the weather condition of an environment.

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Answer:

A = 0.13 m

Explanation:

Given that,

Mass of a block, m = 1.4 kg

Spring constant of the spring, k = 16.5 N/m

While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 45.0 cm/s or 0.45 m/s

We need to find the amplitude of the subsequent oscillations.

We can use the conservation of energy here. Initially, the kinetic energy of the block is maximum and then it gets converted to the potential energy of the spring.

Mathematically,

\(\dfrac{1}{2}mv^2=\dfrac{1}{2}kA^2\)

A is the amplitude of subsequent oscillations.

\(A=\sqrt{\dfrac{mv^2}{k}} \\\\A=\sqrt{\dfrac{1.4\times (0.45)^2}{16.5}} \\\\A=0.13\ m\)

So, the amplitude of subsequent oscillations is 0.13 m.

Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.

Answer:

The boiling point of nitrogen on the absolute temperature scale is 77.15 K

Explanation:

Temperature in Kelvin(Absolute temperature) = Temperature in Celcius + 273.15.