what are five examples of things melting?​

To find the Thevenin voltage (VTh) without using Kirchhoff's voltage law (KVL) or Kirchhoff's current law (KCL), we can apply the voltage divider rule. The voltage divider rule states that the voltage across a resistor in a series circuit is proportional to its resistance.

In Figure 8-82, we need to determine the current through the load RL. To do this, we first find the Thevenin voltage (VTh) which is the open-circuit voltage across the load terminals. Here's how we can find it using the voltage divider rule:

Identify the two resistors in series: The 5.6 kQ resistor and the 15 kQ resistor.
Calculate the total resistance (RT) of the series combination: RT = 5.6 kQ + 15 kQ = 20.6 kQ.
Identify the resistor across which you want to find the voltage: In this case, it is the 15 kQ resistor.
Apply the voltage divider rule: \(VTh = (R2 / (R1 + R2)) * VSource\).
  - Substitute the values: \(VTh = (15 kQ / (5.6 kQ + 15 kQ)) * 32 V\).
  - Simplify the expression:\(VTh = (15 kQ / 20.6 kQ) * 32 V\).
  - Calculate VTh:\(VTh ≈ 23.44 V\).
Therefore, the Thevenin voltage (VTh) is approximately 23.44 V.
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Answer:

Waves come in two kinds, longitudinal and transverse

Explanation:

hope it helps hehe

Kepler's Second Law indirectly describes the speeds with which planets travel in their orbits.

This law, also known as the Law of Equal Areas, states that a line connecting a planet to the sun sweeps out equal areas in equal times, implying that planets move faster when closer to the sun and slower when farther away.

According to Kepler's Second Law, a line that connects a planet to the sun, known as the radius vector, sweeps out equal areas in equal times as the planet moves along its elliptical orbit.

This means that a planet covers the same amount of area in its orbit during equal time intervals, regardless of where it is in its orbit. This implies that a planet moves faster when it is closer to the sun and slower when it is farther away.

This observation has significant implications for our understanding of planetary motion. As a planet moves closer to the sun, it experiences a stronger gravitational pull, which accelerates its motion and causes it to move faster.

Conversely, as a planet moves farther away from the sun, the gravitational pull weakens, resulting in a slower motion. This is consistent with Kepler's Second Law, which states that planets move faster in the inner parts of their orbits (when closer to the sun) and slower in the outer parts (when farther away from the sun).

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Answer:

GE = ME - \(\frac{1}{2} m\,v^2\),  which agrees with option C in your list.

Explanation:

The definition of Mechanical Energy (ME) of a system is the addition of the gravitational potential energy (GE) plus the kinetic energy (KE) of the system:

ME = GE + KE

Given that the KE is: \(\frac{1}{2} m\,v^2\),

solving for GE in the formula above gives:

GE = ME - KE = ME - \(\frac{1}{2} m\,v^2\),  which agrees with option C

Answer:

I'm pretty sure it's called Astronomy

Explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

Answer: Astronomy

Explanation: Astronomy is objects we can see with our eyes, like the Sun , the Moon , the planets, and the stars . It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles.

I hope this helps ;o o;

Answer:

C) The nuclei and electrons of the atoms are attracted to each other.

Answer:

34 times

Explanation:

because every 10 meters the presure is 1 times the amount on the surface

a concentric ring model in which social groupings are spatially organised in a hierarchy of rings. The upper class resides further away from the center, while the lower class is located closer to it.

The concentric ring model operates on the presumption that cultural content results from the incorporation of original ideas into the creation and/or presentation of music, text, and picture, and that these concepts originate in the fundamental artistic creativity spheres. Burgess' concentric ring model concept envisions growth occurring in a series of concentric rings surrounding the concentric ring model . According to Hoyt's sector model, economic expansion follows transportation corridors.

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Speed = Wavelength * Frequency

Answer:

the distance the weight is lifted

Explanation:

To lift a 0.1 kg mass at constant speed from floor to a shelf 2.0 m above the floor, the electrical motor needs 3.92 seconds.

Power is defined as the rate of work done or the amount of work done per unit time.

The formula for power is:

P = W / t

Where:

P = power

W = work done

t = time

In the given problem,, the required work is equal to the change of potential energy.

W = Δ P.E

    = m g (h₂ - h₁)

Where:

m = mass

h = height

Let's take the height of the floor as a reference, hence h₁ = 0

Hence,

W = mgh

P = W/t = mgh/t

0.5 = 0.1 x 9.8 x 2 / t

t = 3.92 seconds

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Answer:

40

Explanation:

30

To get the total number of iterations in a nested loop, add the number of iterations in the inner loop to the number in the outer loop is option b. false

A break statement in a nested loop only terminates the loop it is contained in. As a result, even if the inner loop is broken, the outer loop keeps going. The looping ends completely, though, if the break is positioned in the outer loop.

Therefore, the number of outer loop repetitions multiplied by the number of inner loop repetitions is the formula for determining how many times the inner loop executes. The nested for loops have an iteration count of N=N1N2.

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Answer:

At the point of dropping the object, by Newton's first law due to gravitational force \(F_g\) = m × g, accelerates

By Newton's Second law the object reaches impacts on the air with the gravitational force resulting in changing momentum of m×(Final Velocity - Initial Velocity)

As the velocity increases, the rate of change of momentum becomes equivalent to the gravitational force and by Newton's third law, the action action and reaction are equal and opposite hence they cancel each other out

The body then moves at a constant uniform motion down according to Newton's first law

Explanation:

At the point the object of mass, m, is dropped from the height of the tower, the only force acting on the object is the gravitational force such that the object has an acceleration which is the acceleration due to gravity, g, and the gravitational force is therefore = m × g

As the speed of the object increases while the object is falling with the gravitational acceleration the rate at which the object cuts through layers of air which (by Newton's first law of motion, are at rest ) has some buoyancy effect also increases therefore, the object is constantly increasingly changing the momentum of the air which by Newton's second law results, at an high enough velocity, and by Newton's third law, in a force equal to the applied gravitational force

Therefore, the force of the air drag becomes equal to the gravitational force, cancelling each other out and the object then moves according to Newton;s first law, in uniform motion of a constant speed while still falling down.

Answer:

the answer is B

visible light

Answer:

5.0 kg

Explanation:

use the equation; (m1v1i) + (m2v2i) = (m1v1f) + (m2v2f)

The law of conservation of matter states that matter cannot be created or destroyed, only transformed from one form to another.

When a tree grows and increases its mass, it may seem like this law is being violated.

However, upon closer examination, we can see that the tree is not creating new matter, but rather it is transforming existing matter into new forms.

The tree uses energy from sunlight to convert carbon dioxide from the air and water from the soil into glucose, a type of sugar.

This process, known as photosynthesis, results in the creation of new organic matter in the form of leaves, branches, and roots.

As the tree grows, it continues to transform matter from its environment into new forms, but the total amount of matter in the system remains constant.

Therefore, the growth of a tree is not a violation of the law of conservation of matter, but rather a demonstration of the transformation and conservation of matter in the natural world.

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Answer:

The wrong items are;

1) The normal for FN equals the weight Fmg

2) The force of friction, Ff, equals the applied force Fpull

The corrected statements are;

1) The normal force is weight less the vertical component of the applied force Fpull

FN = Fmg - Fpull × sin(θ)

2) The force of friction equals the horizontal component of the applied force Fpull

Ff = Fpull × cos(θ)

Explanation:

The given statement was;

The velocity of the block is constant, so the net force exerted on the block must be zero. Thus, the normal force FN equals the weight Fmg, and the force of friction Ff equals the applied force Fpull

By the equilibrium of forces actin on the system, given that the applied force acts at an angle, θ, with the horizontal, we have;

The normal force is equal to the weight less the vertical component of the applied force;

That is we have, FN = Fmg - Fpull × sin(θ)

The friction force similarly, is equal to the horizontal component of the applied force;

Ff = Fpull × cos(θ)

The wrong items are therefore as follows;

1) The normal for FN equals the weight Fmg

1 i) The normal force is weight less the vertical component of the applied force Fpull

FN = Fmg - Fpull × sin(θ)

2) The force of friction, Ff, equals the applied force Fpull

2 i) The force of friction equals the horizontal component of the applied force Fpull

Ff = Fpull × cos(θ).

The observations that suggest the mass of the galaxy goes much farther out than its visible disc are Rotation Curves of Galaxies and Gravitational Lensing.

The speed of stars and gas in the disk of a galaxy, as a function of radius, is referred to as a rotation curve.

The velocity of stars and gas in the disk of a spiral galaxy is illustrated by a typical rotation curve.

As a function of distance from the galactic center, the curve charts the rotation speed.

This has suggested that a massive dark matter halo exists around spiral galaxies and that the mass of the galaxy goes much farther out than its visible disc.

Gravitational lensing is the bending of light by gravity.

Massive objects like galaxies and galaxy clusters bend light passing near them, causing distant sources to appear distorted and magnified.

Gravitational lensing can reveal the presence of dark matter in a galaxy since it is believed that dark matter outweighs luminous matter and can cause more bending of light than visible matter would alone.

This suggests that dark matter exists outside the visible galaxy disk, indicating that the mass of the galaxy extends much farther out than its visible disc.

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The velocity of the person need to leave the ground to accomplish this is 7.642 m/s.

Velocity is the directional velocity of a moving object as an indicator of the rate of change of position observed from a certain frame of reference and measured at a certain time reference Velocity is a fundamental concept in kinematics, a branch of classical mechanics that describes the motion of bodies.

Velocity is a physical vector quantity. Both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is called velocity, and its magnitude is a consistent derived unit measured in the SI (metric) system as meters per second (m/s or m⋅s−1). An object is said to be accelerating if its velocity, direction, or both change.

Highest jump=2.98m

final velocity (V)= 0 m/s

let initial velocity be U

    so   \(V^{2} =U^{2} -2gh\)

            \(0^{2} =U^{2} -2*9.8*2.98\)

           U=7.642 m/s

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A. The wires will be organized in ascending resistance order.

A wire's resistance is determined by

\(R=\frac{pL}{A}\)

where,

p is the substance's resistance

L is the wire's length.

A is the wire's cross-sectional area.

The only quantity that varies in this problem is the thickness, which corresponds to the value of A for each of the many wires, all of which are constructed of the same material and have the same length (same L).

Since the resistance R is inversely correlated with the cross-sectional area A, we can infer from the formula that the smaller the value of A, the higher the value of R. As a result, if we organize the wires in decreasing order of thickness, we are actually putting the wires in

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The brightest star in the constellation Lyra is Vega. Vega is a bluish-white main-sequence star located approximately 25 light-years away from Earth.

It is one of the most prominent stars in the northern sky and is easily recognizable due to its brightness.

Vega is considered one of the three stars that form the Summer Triangle, along with Altair in Aquila and Deneb in Cygnus. These stars are visible during the summer months in the Northern Hemisphere and are used as prominent markers in the night sky.

Vega is also of significant astronomical importance as it served as the reference star for the calibration of the magnitude scale. Its spectral type and luminosity have been used as a standard for comparison with other stars.

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Icy pieces that orbit in the same region as the orbit of Pluto are believed to be members of the Kuiper belt.

The Kuiper belt is a shape-disc formation in the solar system observed from Neptune and more away from our sun.

The Kuiper belt consists of different celestial bodies including among others icy pieces, planets, and comets.

In conclusion, icy pieces that orbit in the same region as the orbit of Pluto are believed to be members of the Kuiper belt.

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A) The electron is in the region of nonzero field for 3.5 × 10^-9 seconds.b) The kinetic energy of the electron is 6.44 × 10^5 eV.

a) The formula used to find the time taken by the electron in the region of the nonzero field is given by,t = L / v

where L is the distance travelled and v is the velocity of the electron.t = 2.1 × 10^-2 / (6.0 × 10^6)t = 3.5 × 10^-9 secondsb)

The formula used to find the kinetic energy of the electron is given by,K.E = 1/2 × m × v^2

where m is the mass of the electron and v is its velocity.

Here, we can use the value of v obtained in part (a).K.E = 1/2 × 9.11 × 10^-31 × (6.0 × 10^6)^2K.E = 1.03 × 10^-13 J

To convert this into eV, we divide by the charge of an electron, which is 1.6 × 10^-19 C.K.E = 1.03 × 10^-13 / 1.6 × 10^-19K.E = 6.44 × 10^5 eV

Answer: a) The electron is in the region of nonzero field for 3.5 × 10^-9 seconds.b) The kinetic energy of the electron is 6.44 × 10^5 eV.

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The angular speed of the basketball that turns 15 times in 3 seconds is 5 rev/s

Angular speed is the rate of change of angular displacement is called angular speed.

To calculate the angular speed of the basketball, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the angular speed is 5 rev/s

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Answer:

Cardiovascular or cardio exercise refers to exercise that strengthens the cardiovascular system. The term Aerobic just means in the presence of oxygen, and aerobic exercise refers to exercise that you perform long enough to require oxygen.

The mass of a golf ball can be calculated using the principle of conservation of mass.

The mass of a golf ball can be determined through the principle of conservation of mass by weighing the ball before and after a process that does not change its mass and subtracting any mass change from the total mass to find the mass of the golf ball alone.

To do this, you need to weigh a golf ball before and after a process that does not change its mass, such as immersing it in water or exposing it to a different temperature.

For example, to find the mass of a golf ball using the principle of conservation of mass, you would first weigh the ball on a scale to find its dry mass, then immerse it in water and weigh it again to find its mass in water. The difference between the two masses would be the mass of water that the golf ball displaced, which can be subtracted from the total mass to find the mass of the golf ball alone.

It's important to note that the accuracy of the measurement will depend on the precision of the scale used and the controlled conditions of the experiment, such as the temperature and pressure of the water and the room. Additionally, it's essential to consider the buoyant force that acts on an object immersed in a fluid, which can affect the accuracy of the measurement.

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