Which of the following is a warning sign of an abusive relationship?

The magnitude of the angular acceleration of the magnetic disk is determined as 35 rad/s².

The angular acceleration of the disk is determined from the principle of conservation of angular momentum as follows;

τ = Iα

where;

α is angular acceleration

I is moment of inertia of the disk

I = 0.5MR²

I = 0.5 x 0.2 x 2²

I = 0.4 kgm²

τ = Iα

α = τ/I

α = (14)/(0.4)

α = 35 rad/s²

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Answer:   Burning of wood is a chemical change while cutting of wood is a physical change because during burning, new substances are formed. After burning, we cannot get original substance, (i.e. wood) back. Cutting of wood into small pieces is a physical change because no new substance is formed.

Answer: The options are not given,

Here are the options.

A. channel

B. feedback

C. message

D. sender​

The correct option is C

MESSAGE.

Explanation:

It is message because it is written or verbal or recorded words or communication or ideas transmitted by the sender to the receiver.

It include three aspects, content, structure and style.

The content entails the information and communication, how the information is important, useful and can be read to comprehend.

The structure of a message entails the tone .

The style include how the sender compose and write the message.

Communication is an activity that involves encoding, and decoding, medium and feedback processes

The correct option for the idea transmitted from the sender to the receiver  is message

The reason why message is correct is as follows:

Question: The possible question options are;

Channel

Message

Feedback

Sender

Channel: A channel is a means of communicating a message. It does not always have the features of content, or style

Feedback: A feedback is the information pertaining to a reaction to a message. It does not have a specific structure or depend on style

Sender: A sender is the person from whom a message originates. A sender does not have a content

Message

A message is a unit of communication, that is sent by a sender, to reach an audience which is the receiver. A message may written, verbal or recorded, a message is meant for a recipient that cannot be reached directly

A message contains contains

Therefore;

Message is the idea being transmitted by the sender to the receiver. It includes three aspects-content, structure, and style

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Yes, the experiment you conducted in Lab 5 on Ohm's Law involving resistors in parallel and series circuits provides evidence that the charge divides in a parallel circuit.

To understand this better, let's break down the key concepts in a parallel circuit:

In a parallel circuit, multiple paths are available for the current to flow through.
Each path contains a resistor, and the total resistance in a parallel circuit is calculated using the formula: 1/R_total = 1/R_1 + 1/R_2 + ...
According to Ohm's Law, the voltage across each path (resistor) in a parallel circuit is the same, while the current through each path may vary depending on the resistor values.
Since the voltage is the same across all resistors, the current will divide among the different paths proportionally to the resistance of each path (I = V/R).

When you conducted your experiment and measured the voltage and current across each resistor, you would have observed that the voltage remains constant, and the current divides among the different paths in the parallel circuit. This demonstrates that the charge divides in a parallel circuit, supporting the principles of Ohm's Law and the behavior of resistors in parallel circuits.

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Answer:

c

Explanation:

speed=distance÷time

40÷10=4

Explanation:

Is this ok?......I have got the answer in pascals.

Factors influencing incoming solar radiation include solar angle, atmospheric conditions, and surface characteristics.

Several factors influence the amount of solar radiation reaching Earth's surface. The solar angle, determined by the Earth's tilt and position in its orbit, affects the intensity of radiation. Atmospheric conditions such as cloud cover, aerosols, and pollution can scatter or absorb radiation. Surface characteristics, such as albedo (reflectivity) and vegetation, also influence the amount of incoming radiation.

The composition of incoming solar radiation consists primarily of visible light, ultraviolet (UV) radiation, and infrared (IR) radiation. Visible light is the range of wavelengths perceived by human eyes. UV radiation has shorter wavelengths and can be harmful to living organisms. IR radiation has longer wavelengths and carries heat energy.

Once solar radiation enters the atmosphere, several processes occur. Approximately 30% of incoming radiation is reflected back into space by clouds, atmospheric particles, and the Earth's surface. About 20% is absorbed by the atmosphere, including gases like ozone and water vapor. The remaining 50% reaches the Earth's surface, where it is absorbed by land, water, and vegetation, contributing to various physical and biological processes such as heating the Earth's surface, driving weather patterns, and supporting photosynthesis.

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A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun's rays 17.2 cm in front of the mirror. 34.4 cm is the radius of the spherical surface from which the mirror .

To find the radius of the spherical surface from which the mirror was made, we can use the formula:
\(f = R/2\)
where f is the focal length (the distance between the mirror and the point where the rays converge), and R is the radius of curvature of the mirror.

The percentage for which the focal length is equal to half the radius of curvature is satisfied by the optics theory based on the curvature of a spherical mirror. In terms of math, this is
In this case, we know that the focal length is 17.2 cm, so we can write:
17.2 = R/2
Multiplying both sides by 2, we get:
R = 34.4
Therefore, the radius of the spherical surface from which the mirror was made is 34.4 cm.

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Answer:

The answer is "The location of the bird and time interval between pieces of information".

Explanation:

Please find the complete question in the attached file.

The Radar is the instrument used to gather data from birds by researchers. This would be the primary tool to study the flight behavior of migrating birds with the impact of environmental influences including the ecology of migratory movements, from the broad population group for both the distribution of land areas and geomorphology as well as meteorological systems to the shift in the behavior of airlines of particular birds, especially when responding to lead routes.

Answer:

200 meters

Explanation:

50 meters × 4 times = 200 meters

The total number of meters you swim is 200 meters if the Olympic swimming pool is 50 meters long.

Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.

It is given that:

An Olympic swimming pool is 50 meters long. You swam from one end to the other four times.

Let x be the total number of meters you swim.

x can be found using:

x = 50 + 50 + 50 + 50

x = 50×4

x = 200 meters

Thus, the total number of meters you swim is 200 meters if the Olympic swimming pool is 50 meters long.

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There are different kinds of vehicles.  it's actually dust because Mars is known to have Strong winds that tends to lift a lot of dust off the ground.

The atoms on Mars consist of Protons and Electrons. The atmosphere of Mars is known to be primarily composed of carbon dioxide, molecular nitrogen and argon. It has been found to have some little amount of water vapor, oxygen, carbon monoxide, hydrogen and noble gases.

A high percentage of water on Mars exists in form of ice, though it is said to exists in small quantities in vapor form in the atmosphere.

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Answer:

Work done = 80 gm/s

Explanation:

Given:

Final velocity (v) = 4 m/s

Initial velocity (u) = 0 m/s

Mass of ball (m) = 40 g

Find:

Work done.

Computation:

Using work energy rule

Work done = Change in kinetic energy

Work done = 1/2[mv-mu]

Work done = 1/2[(40)(4) - (40)(0)]

Work done = 1/2[(40)(4)]

Work done = 80 gm/s

Answer:6000

Explanation:

Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2. We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

Answer:

4.    0.12mm

5:

a. screw gauge

b. caliper

Answer:

0.11 mm

vernier calipers

im not sure about the sure about B

Explanation:

Answer:

Things like cloth and softmaterial, pliable, or porous materials

Explanation:

Answer:

Porous absorbers e.g paper, cardboards

Answer: Periods

Explanation: The rows are called Periods

The columns are Groups

Periodic table

Answer:

Force exerted on the car is 7030 N.

Explanation:

It is given that,

Mass of the car, m = 740 kg

Initial speed of the car, u = 19 m/s

Final speed of the car, v = 0

Time taken, t = 2 s

Let F is the force exerted on the car during this stop. We know that it is equal to the product of force and acceleration. Mathematically, it is given as :

F=m\times \dfrac{v-u}{t}F=m×tv−u

F=740\times \dfrac{0-19}{2}F=740×20−19

F = -7030 N

So, the force exerted on the car during this stop is 7030 N. Hence, this is the required solution.

Answer:

The person can jump 48 m on the Moon

Explanation:

The question parameters are;

The maximum long jump distance of a person on Earth, \(R_{max}\) = 3 m

The acceleration due to gravity on the Moon = 1 ÷ 16 of that on Earth

The distance the person can jump on the Moon is given as follows;

A person performing a jump across an horizontal distance on Earth (under gravitational force) follows the path of the motion of a projectile

The horizontal range, \(R_{max}\), of a projectile motion is found by using the following formula

\(R_{max} = \dfrac{u^2}{g}\)

Where;

g = The acceleration due to gravity = 9.8 m/s²

Therefore, we have;

\(R_{max} = 3 \, m = \dfrac{u^2}{9.8 \, m/s^2 }\)

u² = 3 m × 9.8 m/s² = 29.4 m²/s²

Therefore, on the Moon, we have;

The acceleration due to gravity on the Moon, \(g_{Moon}\) = 1/16 × g

∴ \(g_{Moon}\) = 1/16 × g = 1/16 × 9.8 m/s² ≈ 0.6125 m/s²

\(R_{max \ Moon} = \dfrac{u^2}{g_{Moon}} = \dfrac{29.4 \ m^2/s^2}{0.6125 \, m/s^2 } \approx 48 \, m\)

The maximum distance the person can jump on the Moon with the same velocity which was used on Earth is \(R_{max \ Moon}\) ≈ 48 m

The equivalent thrust force required by the water jets to keep the rider levitating in place would be equal to their weight.

Flyboarding is a popular water-based recreational activity where individuals stand on a platform that propels water downwards, causing them to fly into the air.

The activity uses water jets to push the rider up and keep them levitating. If a rider is levitating in place, they will be experiencing an equivalent thrust force equal to their weight.

The weight of the rider is the force exerted by gravity and it will be equal to the force exerted by the water jets to keep them levitating.

The equivalent thrust force exerted by the water jets would have to be the same as the rider's weight in order to keep them suspended in place. This is because the rider is neither moving up nor down, so the water jets would have to be producing an equal force to counterbalance their weight and keep them in place.

Therefore, the equivalent thrust force required by the water jets to keep the rider levitating in place would be equal to their weight.

This would vary depending on the rider's weight, but if we assume an average weight of around 70 kg, the equivalent thrust force required would be approximately 686 Newtons (70 kg x 9.81 m/s²).

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To determine the potential difference required to accelerate an electron to a certain speed, we can use the equation for the kinetic energy of the electron:

KE =(1/2)mv^2

where KE is the kinetic energy, m is the mass of the electron, and v is the speed of the electron.

The potential difference required to accelerate the electron can be found using the equation:

ΔV = KE/q

where ΔV is the potential difference, q is the charge of the electron (which is negative), and KE is the kinetic energy.

Non-relativistic solution:

For a non-relativistic electron, we can use the classical equation for kinetic energy:

KE = (1/2)mv^2

where m is the mass of the electron and v is the speed of the electron.

Setting KE equal to the work done by the electric field, we get:

KE = qΔV

Substituting for KE and solving for ΔV, we get:

ΔV = (1/2)(mv^2)/q

Substituting the known values for the mass and charge of the electron, we get:

ΔV = (1/2)(9.11 × 10^-31 kg)(v^2)/(1.6 × 10^-19 C)

ΔV = 0.056 v^2 volts

Relativistic solution:

For a relativistic electron, we need to use the relativistic equation for kinetic energy:

KE = [(γ - 1)mc^2]

where γ is the Lorentz factor, m is the mass of the electron, and c is the speed of light.

We can calculate γ using the equation:

γ = 1/√(1 - v^2/c^2)

Setting KE equal to the work done by the electric field, we get:

[(γ - 1)mc^2] = qΔV

Substituting for γ and solving for ΔV, we get:

ΔV = [(γ - 1)mc^2]/q

Substituting the known values for the mass and charge of the electron, we get:

ΔV = [(γ - 1)(9.11 × 10^-31 kg)(2.998 × 10^8 m/s)^2]/(1.6 × 10^-19 C)

ΔV = [(γ - 1)8.187 × 10^-14 J]/(1.6 × 10^-19 C)

ΔV = 5.117 × 10^5(γ - 1) volts

Comparing non-relativistic and relativistic solutions:

To compare the non-relativistic and relativistic solutions, we can substitute the non-relativistic equation for ΔV into the relativistic equation for ΔV and simplify:

ΔVrel ≈ ΔVnon-rel + (1/2)(mc^2/q)

Substituting the known values for the mass and charge of the electron, we get:

ΔVrel ≈ ΔVnon-rel + 0.512 MeV/volt

We can see that the relativistic solution is larger than the non-relativistic solution by an additional term of (1/2)(mc^2/q), which represents the increase in kinetic energy due to relativistic effects.

Therefore, to accelerate an electron to a certain speed, the required potential difference will be higher when considering relativistic effects compared to the non-relativistic case.

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The majority of the mass of the Milky Way lies farther out than the Sun's orbit. The statement is True.

This is because the Milky Way is a spiral galaxy, and the spiral arms contain most of the stars and gas. The Sun is located in one of the spiral arms, but it is not in the center of the galaxy.

The center of the galaxy is much more massive than the Sun's location, and it contains a supermassive black hole.

The Milky Way has a mass of about 1.5 trillion times the mass of the Sun. The Sun's orbit is about 25,000 light-years from the center of the galaxy.

The spiral arms extend out to about 50,000 light-years from the center of the galaxy. This means that the majority of the mass of the Milky Way lies farther out than the Sun's orbit.

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Answer:

Decreases the friction between the mallet and the pick.

The movement of the school bus that is powered by petroleum as chemical potential energy is an example of Kinetic energy. This is because the chemical potential energy from the petroleum is transferred through the engine, converting it into kinetic energy which then moves the bus.

Kinetic energy refers to the energy of an object in motion. It is defined as the work required to bring a body of a given mass from a state of rest to a state of motion. It is measured as the amount of work needed to accelerate a body of a given mass to a given speed. Kinetic energy is proportional to the square of the object's speed, which means that as the object's speed increases, so does its kinetic energy. Therefore, the movement of the bus, which is an object in motion, is an example of kinetic energy.

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The value of the summation of forces in the direction of the flight path depends on the specific scenario and the forces acting on the object in question.

To calculate the value of the summation of forces in the direction of the flight path, we need to consider all the forces acting on the object and determine their magnitudes and directions. In the context of flight, these forces typically include thrust, drag, lift, and weight.

Thrust is the force generated by engines or propulsion systems and acts in the direction of motion. It propels the object forward and contributes positively to the summation of forces in the direction of the flight path.

Drag, on the other hand, is the resistance encountered by the object as it moves through the air. It acts in the opposite direction of motion and contributes negatively to the summation of forces.

Lift is the force generated by the wings or lifting surfaces and acts perpendicular to the flight path. It counteracts the force of gravity and can be decomposed into vertical and horizontal components. The vertical component contributes to the summation of forces, while the horizontal component cancels out with drag.

Weight is the force exerted by gravity on the object and acts vertically downward. It also contributes to the summation of forces in the flight path direction.

The value of the summation of forces in the direction of the flight path can be determined by adding up the magnitudes of the contributing forces and considering their respective directions. It is important to note that in steady flight, the summation of forces in the direction of the flight path is typically zero, indicating a balanced state where the forces are equal and opposite.

To calculate the specific value, detailed information about the aircraft or object, its velocity, and the forces acting upon it is necessary.

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The work done by friction W = (F1 - mg sin θ) L,   W = -μ  mg cos θ L.

Use Newton's Second Law to find the force of friction. In these tasks, the X-axis will be parallel to the plane and the Y-axis will be perpendicular to the plane:

Y-Axis  

N -  =\(w_{y}\)

N = W_{y}

X axis

F1 - fr - Wₓ = 0

fr = F1 - Wₓ

Let's use trigonometry to find the components of the weight

sin θ = Wₓ / W

cos θ = W_{y} / W

Wₓ = W sin θ

W_{y} = W cos θ

We substitute

fr = F1 - W sin θ

Work is defined by

W = F .dx

W = F dx cos θ

Since the friction force is in the negative direction parallel to the plane and the displacement along the plane is positive, the angle is 180° and cos θ = -1

W = -fr x

W = (F1 - mg sin θ) L

Another way to calculate is

fr = μ N

fr = μ W cos θ

the work is

W = -μ  mg cos θ L.

Zero work can occur in any of the following situations When a single force is applied but no displacement. There are gaps but the power of the individual is not showing. A single force is applied in a direction perpendicular to the direction of displacement.

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The event that settled the Shapley-Curtis debate about the nature of spiral nebulae was the discovery of is cepheid variable stars in the Andromeda nebula.
History of  Shapley-Curtis debate
In 1920, the so-called "Great Debate" took place between Harlow Shapley and Heber Curtis about the nature of the Milky Way, spiral nebulae and the dimensions of the universe.  To support his claim that the Great Andromeda Nebula is an external galaxy, Curtis pointed out evidence of dark bands resembling the dust clouds present in the Milky Way as well as a significant Doppler shift.
The problem was definitively resolved in 1922 when the Estonian astronomer Ernst Öpik provided distance determinations that supported the theory that the Andromeda Nebula was legitimately a distant extragalactic object.
Using the Mount Wilson Observatory's new 100-inch telescope, Edwin Hubble was able to determine that the outer fields of some spiral nebulae were clusters of single stars and identified several Chepeid variable stars, which allowed him to estimate the distances of the nebulae: they were too far away to be able to  form part of the Milky Way. In 1936 Hubble created a classification system for galaxies that is still used today, the Hubble sequence.
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Answer:

Bullets are cylindrical metal projectiles shot from firearms. Their main function is to kill or otherwise incapacitate. They come in numerous varieties for use in handguns, rifles, and machine guns. There is also special ammunition capable of penetrating armor, firing underwater, or firing "silently" at subsonic speeds. However, their designs are all basically the same. A typical cartridge consists of four components: the cartridge case, primer, propellant charge and bullet. When a gun trigger is pulled, the primer is struck, igniting the propellant. This causes a rapid expansion of gas, which forces the bullet forward and ejects the casing. Contrary to popular belief, guns are not loaded with bullets, but cartridges, and they fire bullets (since bullets are a more common term and the actual objects responsible for harm, they receive the recognition).

While small in size (the most popular handgun bullet is 9 mm in diameter) bullets posses enough kinetic energy to cause serious damage. Using a kinematics formula, it is possible to determine the acceleration of a bullet when the muzzle velocity and barrel length of a gun are known.

v2 = vo2 + 2as

Where

v is the muzzle velocity

vo is the initial velocity of the bullet, which is zero

a is the acceleration

s is the barrel length

Since acceleration is the desired value, the derived formula is this:

equation

When fired from a Beretta 92S, the standard issue US Army pistol, a 9 mm Parabellum bullet has a muzzle velocity of 335 m/s. With its 127 mm barrel length, the bullet's acceleration is calculated to be 4.4 × 105 m/s2.

The acceleration of a bullet depends largely on the gun from which it is fired, along with the intent of the user. Pistol bullets generally feature a lower acceleration than rifles or machine guns. Also, individuals involved with clandestine operations may use firearms with silencers, which suppress bullet speed and require special subsonic ammunition.

Remember, guns don't kill people. Bullets do. To paraphrase Chris Rock in Bigger, Blacker and Uncut, if bullet prices were raised to $5,000 each, there would be a drastic decrease in murders [mp3].