The sum of the changes of potential around any closed circuit loop is.

Answer:

A claim made by scientists backed up with evidence and research!

Explanation:

Hope this helped! :)

A change in temperature frequently causes substances to change phases. Most substances are solid at low temperatures; as the temperature rises, they become liquid; and at still greater temperatures, they become gaseous.

Melting is the conversion of a solid into a liquid (an older term that you may see sometimes is fusion). Solidification is the process where a liquid turns into a solid. The melting point, or the temperature at which a pure substance begins to melt, is a property of that substance. A solid must expend energy to become a liquid. A specific quantity of energy is required by every pure substance in order to transform from a solid to a liquid. This amount is known as the substance's enthalpy of fusion (or heat of fusion).

The complete question is- The diagram shows how states of matter can change when energy is either added or removed.

System before change

System after change

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All of these statements below are true EXCEPT

Energy was added to the matter causing the particle movement to increase.

The matter changed states which is a physical change.

The particles in the matter before the change had more energy than after the change.

The particles in the matter before the change had less energy than after the change.

the diagram is attached below.

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Answer:

B. Digital Signal

Explanation:

I am not Wrong.

Having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.Kinetic theory of matter is the explanation of how particles in matter behave.

The kinetic theory explains that particles in matter are always in constant motion. The movement of these particles depends on the temperature and phase of matter.Particles in a solid state move slower than particles in a liquid state. Also, particles in a liquid state move slower than particles in a gaseous state. The faster the particles are moving, the higher the temperature.This means that having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.

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Answer:

Time, t = 2 seconds

Explanation:

Given the following data;

Mass, m = 50 kg

Initial velocity, u = 0 m/s (since it's starting from rest).

Final velocity, v = 8 m/s

Force, F = 200 N

To find the time, we would use the following formula;

\( F = \frac {m(v - u)}{t} \)

Making time, t the subject of formula, we have;

\( t = \frac {m(v - u)}{F} \)

Substituting into the formula, we have;

\( t = \frac {50(8 - 0)}{200} \)

\( t = \frac {50*(8)}{200} \)

\( t = \frac {400}{200} \)

Time, t = 2 seconds

The values of all sub-parts have been obtained.

(1).  The maximum factored load the beam can withstand is 45.2 kN/m.

(2).  The moment resistance of the cross-section is 291735.65 Nm.

(3).  The factored moment demand is 27939.6 Nm

1) To draw the governing shear and bending moment diagram for the factored load, we need to first calculate the maximum factored load that the beam can withstand.

The maximum factored load on the beam is given by:

Dead Load = 20 kN/m + 15 kN

                   = 35 kN/m.

Live Load = 2 kN/m + 1 kN

                = 3 kN/m.

Total Factored Load = 1.2 x Dead Load + 1.6 x Live Load

                                  = 1.2 x 35 kN/m + 1.6 x 3 kN/m

                                  = 45.2 kN/m.

The maximum factored load the beam can withstand is 45.2 kN/m.

The shear force and bending moment diagrams for the given factored load can be obtained as shown below:

Shear Force Diagram:

Bending Moment Diagram:

2) To calculate the moment resistance of the cross-section, we can use the formula:

MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)

Where, σst = yield stress of tension steel [σst = fy / γst],

γst = safety factor for tension steel [γst = 1.15A']

A' = area of tension steel, [A'' = b(d - a)].

Where,

b = width of the beam [b = 600 mm],  

d = total height of the beam [d= 1000 mm],

a = effective depth of tension steel [a = 920 mm]

f'c = compressive strength of concrete [f'c = 25 MPa],

MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)

MR = (400 / 1.15) x 10 x (1000 - 920/2) + 0.85 x 25 x 590 x (1000 - 920/2)

MR = 291735.65 Nm

The moment resistance of the cross-section is 291735.65 Nm.

3) To check if this cross-section is adequately designed to resist the factored bending moment (LRFD), we need to calculate the factored moment demand and compare it with the moment resistance.

The factored moment demand is given by:

MF = ϕ x Mu

Where,ϕ = resistance factor = 0.9, Mu = factored bending moment

Mu = 1.2 x Dead Load x L2 / 8 + 1.6 x Live Load x L2 / 8 + 1.2 x (Dead Load + Live Load) x L2 / 2

   = 1.2 x 35 x 152 / 8 + 1.6 x 3 x 152 / 8 + 1.2 x 38 x 152 / 2

   = 31044 Nm

MF = ϕ x Mu

     = 0.9 x 31044

    = 27939.6 Nm

The factored moment demand is 27939.6 Nm, which is less than the moment resistance of the cross-section, i.e., 291735.65 Nm.

Therefore, this cross-section is adequately designed to resist the factored bending moment.

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Answer:

Sorry if I kwon the

answer I telling u

the answer sorry

The properties of stars are:  mass, age, distance, metallicity (chemical composition), variability and motion through space.

An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity. The Sun is the star that is closest to Earth.

Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light. Many of the brightest stars have names, and the most notable stars have been grouped into constellations and asterisms.

Star catalogues have been put out by astronomers that list the known stars and offer standardized stellar labels.

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Answer: Stars produce energy through nuclear fusion.

Stars are massive objects composed of gas.

Stars are composed primarily of hydrogen and helium.

P.S can I get the brainiest?

Answer:

5)

Solution

initial velocity = 15 m/s

acceleration = 3m/s^2

time = 4 s

final velocity = 15+3×4

=15+12

=27m/s

A car accelerates from 20m/s to 30m/s in 10 second

T9 be honest I think some part of the second question is missing

At some distance away from a long, straight current carrying wire, the magnetic field points perpendicular to the wire. This is known as the right-hand rule, which is used to determine the direction of the magnetic field in relation to the direction of the current flow.

A long, straight current-carrying wire produces a magnetic field, and the direction of the field is determined by the right-hand rule. This rule states that if you wrap your right hand around the wire in such a way that your thumb points in the direction of the current, your fingers will point in the direction of the magnetic field.

The direction of the magnetic field can also be determined by the direction of the current flow. The field is perpendicular to the wire and circular around the wire. This means that the field lines of the magnetic field are circular around the wire, and they point in the direction of the current flow.

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The height at which the diver must jump in other to hit the water with a speed of 24 m/s is 29.4 m.

The height of the player above the ground can be calculated using the formula below.

Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

⇒ Solve for s.

Hence, The height at which the diver must jump in other to hit the water with a speed of 24 m/s is 29.4 m.

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Answer:

there is no list of "the following" you might want to re-upload your question.

Answer: Substance 3 is liquid at room temperature

Explanation: The common room temperature is assumed to be 20-22°C, we need to find the substance that will be in liquid state in that temperature.

For Substance 1, the boiling point is -195.975°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas.

For Substance 2, the boiling point is 3.85°C, and hence at room temperature, it would be in vapor phase and all liquid would have turned to gas in this case too.

For Substance 3, the boiling point is 77.85°C, and melting point is -108.15°C, hence at room temperature, it would be in liquid state.

For Substance 4, the melting point itself is 1800°C, due to which at room temperature it would be in solid state.

The initial speed of the soccer ball is  32.4 m/s.

The initial speed of the soccer ball is calculated by applying the following formula as follows;

The time of motion of the ball;

t = √ (2h/g)

where;

t = √ (2h/g)

t = √ (2 x 2.44 / 9.8)

t = 0.71 s

The initial speed of the soccer ball is calculated as;

d = vt

where;

v = d/t

v = 23 m / 0.71 s

v = 32.4 m/s

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The speed of sound depends solely on the elastic properties and density of the medium. So the speed does not change even the event occurs with ten times as loud. So speed will be 321 m/s.

Loudness depends on the source of the sound. It refers to the intensity of the sound. The speed of the sound does not depend on either the intensity or loudness.

The speed of the sound is determined by the compressibility or rigidity of the medium. If the medium is less compressible, faster will be the speed of sound. The sound moves slower in the denser medium. Since the medium here does not change and intensity of the sound does not determine the speed, the speed of the sound will remain the same.

So the speed will be 321 m/s even it is ten times louder.

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Answer: 1.7 mi

Explanation:

Khan

The wavelength of light given up during this process is approximately 5.911 x 10^-7 meters or 591.1 nm.

To calculate the wavelength of light given up when a molecule decreases its vibrational energy by 0.210 eV, we can use the following formula:

Wavelength (λ) = (hc) / (Energy)

where:
h = Planck's constant (6.626 x 10^-34 Js)
c = speed of light (3.00 x 10^8 m/s)
Energy = 0.210 eV (we need to convert this to joules)

First, let's convert the energy from eV to joules. To do this, we can use the conversion factor of 1 eV = 1.602 x 10^-19 J:

Energy (J) = 0.210 eV * (1.602 x 10^-19 J/eV) = 3.364 x 10^-20 J

Now, let's calculate the wavelength:

Wavelength (λ) = (hc) / (Energy)
λ = (6.626 x 10^-34 Js * 3.00 x 10^8 m/s) / (3.364 x 10^-20 J)
λ = 5.911 x 10^-7 m

So, the wavelength of light given up during this process is approximately 5.911 x 10^-7 meters or 591.1 nm.

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When earth catches up to a slower-moving outer planet and passes it in its orbit, in the same way that a faster runner overtakes a slower runner in an outside lane, the outer planet exhibits retrograde motion.

Retrograde motion is the apparent change in movement of any planet in the sky. It is not real such that the planet doesn't make any movement physically in its orbit.

The planet just appears to be in a movement because the relative positions of that planet and our planet, Earth and how these two planets  move around the Sun.

Therefore, Retrograde motion is actually an illusion which is related to the movement of this Earth-based observer.

One familiar example occurs when an individual passes a car on a freeway, the car that passed appears to have moved backwards, relative to that individual.

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The magnetic field on Earth is due primarily to iron and nickel sinking into the core. Option A is correct.

A magnetic field is a region in space where a magnetic force is experienced by a magnetic object or a moving charged particle. It is created by the motion of electric charges, such as electrons in atoms, or the movement of current in a wire.

The Earth's core is composed mainly of iron and nickel, and the movement of these metals in the liquid outer core generates a magnetic field through a process known as dynamo action.

The flow of liquid metal in the outer core generates electric currents, which in turn create the magnetic field that surrounds the Earth. This magnetic field is important for protecting the Earth from harmful solar radiation and is also responsible for phenomena such as the aurora borealis.

Hence, A. is the correct option.

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Answer:

  Rₓ - F cos θ = 0 ,     R_y - Fsin θ - W = 0

Explanation:

For this exercise we have a static equilibrium problem,

       ∑ F =0

In the attachment we have the forces involved, the weight (W) with vertical direction, the force towards the mask (F) and the reaction force of the ear that we will approximate by its vertical and horizontal components (Rₓ and R_y)

Let's use trigonometry to decompose the force F

       sin θ = Fₓ / F

        cos θ = F_y / F

       Fₓ = F sin θ

       F_y = F cos θ

we write the equations of equilibrium

X axis

           Rₓ - F cos θ = 0

Y axis

           R_y - Fsin θ - W = 0

Answer:

0.2

Explanation:

Mechanical Advantage is defined as the ratio of force output with respect to the force input. Thus,

MA = output / input

MA = 5 / 25

MA = 1/5

MA = 0.2

Since this value is less then one. Even though it's tagged a mechanical advantage, in reality it would be mechanical disadvantage.

Therefore, we can say that the mechanical advantage of the baseball bat is 0.2

Answer:

0.2

Explanation:

Answer:

c

Explanation:

Out of the given options, shovel, pushup, and seesaw are all examples of levers. Hence, the one that is not an example is :

Answer:

Him

Explanation:

He will push less but more and he will use more energy

According to the given question we have the wavelength of a 29.75×109 Hz radar signal in free space is approximately 10.057 mm.

To calculate the wavelength of a radar signal, we need to use the formula:Wavelength = Speed of light / Frequency

Given that the frequency of the radar signal is 29.75×109 Hz and the speed of light is 2.9979×108 m/s, we can substitute these values in the formula as follows: Wavelength = 2.9979×108 m/s / 29.75×109 Hz= 0.010057 m or 10.057 mm

Therefore, the wavelength of a 29.75×109 Hz radar signal in free space is approximately 10.057 mm.

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Explanation:

u=0, v=?, a=5m/s², t=8sec

So, by the formula,

v=u+at

v=0+5×8

v=40m/s.

hope this helps you .

If the lens of our eyes were concave, we would not be able to see. We would be blind. This is because our eyes form a visual image on the same side of the lens at the object being viewed. Thus, a concave lens would result in the visual image focusing in front of the eye, not the retina inside the eye. This would mean that no signals would be sent to the brain, and vision would not be possible.

When a 5.0-Volt battery is connected to two long wires wired in parallel, Wire "A" has a resistance of 12 Ohms, and Wire "B" has a resistance of 30 Ohms.

We can determine the currents flowing through each wire. The currents can be found using Ohm's Law, where current (I) is equal to the voltage (V) divided by the resistance (R). In this case, the voltage is 5.0 Volts.

To calculate the current flowing in Wire "A," we divide the voltage by the resistance of Wire "A." Using Ohm's Law, we find that the current in Wire "A" is 5.0 V / 12 Ω.

Similarly, to find the current flowing in Wire "B," we divide the voltage by the resistance of Wire "B." Applying Ohm's Law, we obtain the current in Wire "B" as 5.0 V / 30 Ω.

Regarding the magnetic force experienced by Wire "B" due to Wire "A," we need to consider the magnetic field created by Wire "A" at the location of Wire "B." The magnetic field produced by a long straight wire is given by the Biot-Savart Law. The magnitude and direction of the magnetic force experienced by Wire "B" can be determined using the equation for the magnetic force on a current-carrying wire in a magnetic field.

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Answer:

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Answer:

It represents Distance.

Explanation:

To calculate the number of turns required for the generator to produce a peak output voltage of vpk = 100, we can use the formula:

vpk = 4.44 * n * b * f * A

Where:
- vpk = peak output voltage (in volts)
- n = number of turns
- b = magnetic field strength (in teslas)
- f = frequency (in hertz)
- A = area of the loop (in square meters)

First, we need to convert the dimensions of the loop from centimeters to meters:
- Length = 10 cm = 0.1 m
- Width = 10 cm = 0.1 m
- Area (A) = Length x Width = 0.1 m x 0.1 m = 0.01 m^2

We are given that the magnetic field strength (b) is constant and has a magnitude of 0.2 T, and the frequency (f) is 60 Hz. We are also given that the peak output voltage (vpk) is 100 V.

Substituting these values into the formula, we get:
100 = 4.44 * n * 0.2 * 60 * 0.01

Simplifying and solving for n, we get:
n = 375 turns

Therefore, the generator needs to have 375 turns in its square loop in order to produce a peak output voltage of 100 V when the electric company experiences a loss of power.

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Given Data:

The applied acceleration is constant.

speed of the car after time,t1 = 20s, is V1=  54 km/h = 15 m/s

speed of the car after time,t2 =  60s, is V2= 108 km/h = 30m/s

we use the formula, V = Vo + a x t

where, Vo is the initial speed, a is the acceleration(constant),

t is the time taken by the object.

a) Acceleration = rate of change of speed with time = V2 - V1 / t2 - t1

a = 30-15/60-20

a = 15/40 = 0.375 m/\({s^{2} }\)

b) Initial speed, Vo = V1 - a x t1

                                = 15 - 0.375 x 20

                                 = 7.5 m/s

c) Speed after 40 s, V = Vo + a x t, t = 40s

                                     = 7.5 + 0.375 x 40

                                      = 22.5 m/s

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