in a downhill ski race, surprisingly, little advantage is gained by getting a running start. (this is because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills.) to demonstrate this, find the final speed for a skier who skies 68.5 m along a 33.0° slope starting from rest. (neglect any friction.)

The correct option is A.

The advantage of using the scientific method is that it is having a well-cautious building of evidence-based understanding that is dependable and logical.

The scientific method includes rigorous observation in addition to logic as a system of reasoning for organizing but for deducing beyond what is known from observation. Induction, prediction, and analogy are only a few examples of different reasoning techniques.

Evidence, as used in legal contexts, is generally defined as information, facts, or data that supports (or refutes) a claim, assumption, or hypothesis. In reality, anything could qualify as proof provided it is deemed to be true, trustworthy, and pertinent.

Although scientists frequently utilize evidence in other ways, such as when applying ideas to real-world issues, scientific evidence is evidence that helps to either support or refute a scientific theory or hypothesis.

Generally speaking, scientific evidence is founded on the knowledge that has been acquired via the application of the scientific method. This indicates that the evidence's underlying assumptions have undergone testing and general acceptance in the scientific community.

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A. Equipment grounding conductor B. Hot (phase) conductor C. Grounded (white) conductor

Silver-colored screw is matched with C) Grounded (white) conductor

Brass-colored screw is matched with B) Hot (phase) conductor

Green hexagonal screw is matched with A) Equipment grounding conductor.

A substance or material that permits the flow of electricity is known as an electrical conductor.

When a voltage is applied, electrical charge carriers, typically electrons or ions, move easily from atom to atom.

There are four different types of conductors: good conductors, semiconductors, resistors, and non-conductors.

Metals are effective electrical conductors. One or more loosely bonded valence electrons, or even just one, can be found in metals. These electrons can freely flow around an electric circuit, creating a domino-like effect.

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Answer:

The Vertical initial velocity for a projectile can be zero for an infinite number of cases. The only requirement stands that the initial velocity (velocity at the time we start observing) should be zero, independent of acceleration along that axis or any other perpendicular axis.

The length of RG, given the data from the question is 14

From the question given above, the following data were obtained:

We can obtain the length of RG as illustrated below:

Length of PG = Length of PR + Length of RG

Thus,

Length of RG = Length of PG - Length of PR

Length of RG = 16 - 2

Length of RG = 14

Therefore, we can conclude that the length of RG is 14

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The two marbles are separated by around 133 m or 30 vehicle lengths.

It is possible to determine the distance between our marble and the most distant galaxies in the universe by first comparing the size of the Milky Way Galaxy to that of a marble.The Milky Way Galaxy is just around 2,000 LY (Light Years) thick and roughly 100,000 LY (Light Years) wide.

Let's continue using the conversion of:

1 cm = 100,000 LY

The Andromeda and Triangulum galaxies are two of the noteworthy members of the Local Group, a collection of galaxies nearby to our own. On this scale, we can assume that distance from Earth and distance from the edge of the Andromeda Galaxy are approximately 2.5 MLY (2.5 Million Light Years) apart.The galaxy spans about 220,000 LY. So let's determine where to place this marble:

2,500,000/100,000 = 25 cm

We may lay a marble to symbolise the Andromeda Galaxy that is nearly twice the size of our Milky Way Galaxy marble at 25 cm.

We can see farther as our observational equipment advances. A galaxy 13.3 BLY distant is the furthest object Hubble can currently observe .

So let's try placing the marble here:

13,300,000,000/100,000 = 13,300cm = 133m

To put this into context, the two marbles are separated by around 30 vehicle lengths.

See the reference pic below:

The complete question is: In a scale model of the Local Group of Galaxies, in which the Milky Way Galaxy was the size of a marble (about 1 cm in diameter), how far would it be from the Milky Way Galaxy to the most distant galaxies in the observable universe on this scale?

The rock takes 2.65 s to hit ground when it is thrown up from the cliff with initial velocity of 8.2 m/s. The cliff is of 8.26 meters height.

A cliff is a section of rock with an overall angle defined by the vertical or nearly vertical in geography and geology. Cliffs are created by the gravitational effects of weathering, erosion, and other activities. Cliffs are typical around rivers, in mountainous regions, escarpments, and on coastlines. Typically, cliffs are made of weather- and erosion-resistant rock. Sandstone, limestone, chalk, and dolomite are the sedimentary materials most likely to result in cliff formation. Cliffs are frequently formed by igneous rocks like granite and basalt. A geologic fault's movement, a landslide, or occasionally rock slides or falling rocks that alter the differential erosion of the rock can result in an escarpment (or scarp), a type of cliff.

The known values are: t=2.65st=2.65s;

y=0m,v0=+8.00m/sv

0​=+8.00m/s; and a=-9.8m/s^2

a=-9.8m/s^2[tex]\sqrt{x} \sqrt{x} \sqrt{x} \sqrt{x}[/tex]

Based on the given values, the formula that we shall use is

y=y0+v0t+1/2at^2

Substituting the values, we have

y=y0+v0t+1/2at^2

=8.26m  

​

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Answer:

The standards establish guidelines for English language arts (ELA) as well as for literacy in history/social studies, science, and technical subjects.

Explanation:

Answer:

A

Explanation:

In order to prevent overloading of any circuit, dual rail electrical supply includes independent tracks and P C B traces that are used to offset voltage sags between various circuits.

Using conductive paths, tracks, or signal traces etched from copper sheets laminated onto a non-conductive substrate, a printed circuit board, or PCB, is used to mechanically support and electrically link electronic components.

Semiconductors are used by practically all inverters to generate a controlled power output. An input voltage is rectified if the source has an ac input.

It is, therefore, the proper response.

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The percent error in your measurement is 2.95 % error.

here it is for the reason that the actual value is 9.81 [tex]m/s^{2}[/tex].

And the calculated value is 10.1 [tex]m/s^{2}[/tex].

Error = 10.1-9.81

        = 0.29

Now percentage error = [tex]\frac{0.29}{9.81}*100[/tex]

                                   = 2.95 %

So, the required error is 2.95 percent.

To degree the percent errors within the given records we should have the idea of percent and error calculation.

To measure the error we should calculate the difference in the real price and the calculated fee.

And to calculate the proportion we ought to divide the received error cost by using the actual price and multiply by means of a hundred.

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Yes, because it incorporates a second clarifying quotation from the expert, adding more weight to the argument presented in phrase 9.

Within a group of diplomats, negotiations and bargaining essentially consist of trying to get more than you are likely to get by negotiating, and eventually reaching a compromise. On occasion, foreign officials will join ongoing negotiations for assistance. Because it advances the interests under its purview and strengthens nations, states, and organizations, diplomacy is significant. The primary tool of foreign policy, which stands for the more general objectives and plans that direct a state's relations with the rest of the world, is diplomacy. Diplomatic negotiations and processes typically lead to international treaties, accords, alliances, and other manifestations of foreign policy. Diplomats may also provide government with advice to assist form a state's foreign policy.

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By Avogadro's number, the radon atoms is 3.02 x 10²² atoms.

We need to know about Avogadro's number to solve this problem. Avogadro's number is the number that explains how many carbon atoms are in one mol. The Avogadro's number is

Na =  6,02 × 10²³ atoms / mol

From the question above, we know that

V = 1.205 qt = 1.205 x 0.95 lt= 1.14475 lt

ρ = 9.73 g/lt

Ar = 222

Calculate the mass of radon

m = ρ . V

m = 9.73 . 1.14475

m = 11.14 gram

Calculate the moles

n = m / Ar

n = 11.14 / 222

n = 0.05 mol

Calculate the number of atoms

N = n . Na

N = 0.05 . 6,02 × 10²³

N = 3.02 x 10²² atoms

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Answer: not alot

Explanation:

True, the length of the eye and the curvature of the cornea determine the refractive error of an eye. Hyperopia, or farsightedness, is produced by a shorter-than-normal eye.

With farsightedness (hyperopia), a common visual issue, you may be able to see far objects clearly but have hazy vision of nearby items.

Your ability to focus is influenced by how farsighted you are. People with severe farsightedness might only be able to see objects that are far away clearly, whereas people with mild farsightedness might be able to see objects that are nearby clearly.

Being farsighted can mean:

Nearby objects might seem hazy

Squinting is required to see clearly.

You experience eye pain or discomfort around the eyes as well as eyestrain.

After performing close work, such as reading, writing, using a computer, or sketching, for a while, you have general eye discomfort or a headache.

Your cornea or lens must be uniformly and smoothly bent to allow light to pass.

You have a refractive error if your cornea or lens are not uniformly and smoothly curved, which causes improper light refraction.

When your cornea is overly flat or your eyeball is shorter than normal, you develop farsightedness. Nearsightedness has the opposite impact.

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The velocity of electron accelerated from rest through a potential difference of 2500 V will be 2.9654848 × 10⁷ m/s.

We have an electron accelerated from rest through a potential difference of 2500 V.

We have to determine its speed.

The Kinetic energy of electron when accelerated through a potential difference of V volts is -

E = eV

According to the question -

Applied Potential Difference = V = 2500 volts

The Kinetic Energy of electron = K[E] = 1.6 x 10¹⁹ x 2500.

Therefore -

1/2 mv² = eV

[tex]$v =\sqrt{\frac{2|e|V}{m_{e} }}\\[/tex]

[tex]$v =\sqrt{\frac{2\times 1.6\times 10^{-19}\times 2500}{9.1\times 10^{-31} }}\\[/tex]

v = 29654848 = 2.9654848 × 10⁷ m/s

Hence, the velocity of electron accelerated from rest through a potential difference of 2500 V will be 2.9654848 × 10⁷ m/s.

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consider F1 = 425 N      θ1 = 55

              F2 = 5 N          θ2 = 161

            F3 = 35 N          θ3 = 320

Now, take x and y component of force

Fx = F1cos55 + F2cos161 + F3 cos320

fx= 425 * 55  + 5 * (-0.94) + 35 * 0.76

fx =242.2- 4.7+ 26.6

fx =264.1

now fy

Fy = F1sine55 + F2sine161 + F3 sine320

fy= 425 * 0.81 + 5 * 0.32 + 35 * (-0.64)

fy = 344.2+1.6-22.4

fy = 323.4

now resultant force

Fr^2= fx^2+fy^2

     = (264.1)^2 + (323.4)^2

Fr= 417

now, consider F1 = 425 N      θ1 = 55

              F2 = 5 N          θ2 = 161

            F3 = 35 N          θ3 = 320

Now, take x and y component of force

Fx = F1cos55 + F2cos161 + F3 cos320

fx= 425 * 55  + 5 * (-0.94) + 35 * 0.76

fx =242.2- 4.7+ 26.6

fx =264.1

now fy

Fy = F1sine55 + F2sine161 + F3 sine320

fy= 425 * 0.81 + 5 * 0.32 + 35 * (-0.64)

fy = 344.2+1.6-22.4

fy = 323.4

now resultant force

Fr^2= fx^2+fy^2

     = (264.1)^2 + (323.4)^2

Fr= 417

now, resultant angle

tan θ =fy/fx

  = 323.4/264.1

tan θ = 1.2

θ =0.020

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At one location in the orbit, the altitude is 10,000 km.

Its perigee is the monthly location where it comes closest to Earth (this varies throughout the year).

The Moon’s apogee is the location where it is each month when it is the furthest away from Earth (this varies throughout the year as well).

The location on an object’s orbit around the earth that is furthest from the planet’s core, such as a satellite.

The distance at which an object orbiting a planet or satellite (like the moon) reaches that point.

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The correct answer is 598.4m

Two key elements in describing a wave's nature are its wavelength and frequency. Wavelength is essentially a measurement of the separation between two adjacent wave crests or troughs. It is always calculated in the direction of the wave, and the sign for it is. Given that it is a measurement of distance, it is stated in terms of metres.

Frequency: The number of times a particle vibrates during a sound wave's passage through a medium is referred to as frequency. The total amount of vibrations that occur within a certain period of time is the frequency.

Wavelength: The distance between two successive curve crests or troughs is known as a wavelength. The distance between the crests and troughs of a high-frequency wave is smaller than that of a low-frequency wave, and vice versa.

s=93km=93000m

f=11.1hz

t=24.43 sec

λ=v/f

λ=s/ft

λ=93000/(11.1)(14)

λ=93000/155.4

λ=598.4m

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Answer:

proton = charge is + (positive charge)

neutron = charge is 0 ( no charge - neutral)

electron = charge is - (negative charge)

hope this is what you meant :)

The tension on the wire is 52.02N.

Using the formula:

[tex]v = \sqrt{\frac{T}{u} }[/tex]

where, v = speed of sound wave

           T = tension in wire

           μ = mass per unit length

The area of aluminium wire is : [tex]\frac{\pi d^{2} }{4}[/tex]

Area = 1.66×[tex]10^{-5}[/tex][tex]m^{2}[/tex]

and μ = ρA = 2700×1.66×[tex]10^{-5}[/tex]

μ = 0.045kg/m

Therefore, tension is :

[tex]v = \sqrt{\frac{T}{u} }[/tex]

[tex]34^{2} = \sqrt{\frac{T}{0.045} }[/tex]

Solving for T we get, T = 52.02N.

Therefore, the tension on the wire is 52.02N.

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The angular frequency of the proton which is cyclotron with a magnetic field of 0.36t is 4.31 x 10⁷ rad/s .

The electromagnetic force, one of the four fundamental forces of nature, is the origin of the magnetic force, which is produced by the movement of charges. Any two charge-containing objects travelling in the same direction are attracted to one another magnetically.

The electromagnetic force, one of the four basic forces of nature, produces the magnetic force, which is caused by the movement of charges. A magnetic attraction draws two charge-containing objects together when they are moving in the same direction.

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According to this estimate, at any distance, the gravitational force between two electrons is always 4.1 x 10^42 times stronger than the electric force between them.

Gravitational attraction definitions. The force of attraction between all masses in the universe, particularly the pull of the earth’s mass on objects that are close to its surface.

Gravitation, gravitational force, and similar terms.

The force interacting with the Earth and Sun. the driving force behind the Moon’s revolving orbit around the Earth. The force of the Moon is what drives the tides in the ocean. The force trapping every gas inside the Sun.

The mass of the Earth is what creates gravity. The combined gravitational force of all of its mass acts on the mass in your body. What gives you weight is that. Moreover, if you lived on a planet with a mass lower than

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The angular speed of the car's wheel in units of radians/second is determined as 31.42 radian per second.

The angular speed of the car's wheel is calculated as follows;

ω = 5 rev/sec

Convert the angular speed in revolutions per second to radian per second.

ω = 5 rev/sec x 2π rad/rev

ω = 10π rad/sec

ω = 31.42 rad/sec

Thus, the angular speed of the car's wheel in units of radians/second is determined as 31.42 radian per second.

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Answer: i counted 10 waves on your graph

Explanation: hope this helps!!!

Answer:

The Number of waves is 9 based on the trough and crest.

Green box is subject to balanced force, while red, blue, and green boxes are under unbalanced force.

When there is a balanced force, forces acting in the opposite direction are applied to the body. Zero net force is produced when equal forces are applied in each direction. The body continues to be in an equilibrium state. The body doesn't accelerate at all.

If it was initially at rest, it stays there, and if it was in motion, it keeps moving constantly while under an unbalanced force. The net force is not zero when just one direction is affected by the force of direction. Alternatively, the direction of motion is determined by the net resultant force when the forces acting on each side are not equal.

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When two objects of different temperatures come into contact with each other, equilibrium is reached and energy is transferred from the hotter object to the cooler object until the objects reach thermal equilibrium (that is, they are at the same temperature).  

When one object heats another, the increase in the temperature of one object is not always the same as the decrease in the temperature of the other, because the specific heat of one object is higher than the other.

Objects exchange thermal energy until they are at the same temperature. When two objects with different temperatures come into contact, they eventually achieve the same temperature. This is because of the thermal equilibrium.

Heat Transfer: Heat Transfer from Warmer Object to Cooler Object - When two substances at different temperatures are mixed, heat is transferred from a hotter object to a cooler object until the same temperature is reached (zero law of thermodynamics) - thermal equilibrium).

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By switching to a higher power objective lens, the working distance is shrunk while the overall magnification increases.

What is working distance of a microscope?

Working distances for high-power oil immersion objectives can be as low as 0.1 mm and as high as 50 mm for dissecting or stereo microscope objectives. As magnification, resolution, and numerical aperture rise, it falls. Most microscope objectives are made with limited operating distances in mind.

By switching to a higher power objective lens, the working distance is shrunk while the overall magnification increases. On the other hand, lowering the total magnification while extending the working distance by adding a reduction objective.

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Answer:

4Kg

Explanation:

1/2mv²=K.E

1/2m×3²=18J

1/2m×9=18

9m=18×2

9m=36

m=36/9

m=4Kg

Answer:

F=MA FORSE= MASS X ACCELERATION

Explanation:

So the answer should be 54 as 18 X 3 = 54

( I read the question wrong)

The magnitude of the force along ac is 322.97 lb and the design angle of the system is ϕ = 38.26°

The Given problem can be solved on the Parallelogram law of vector addition and law of sines,

from the figure, we can write

F = √(400² + 600² - 2(400 × 600)cos 30)

F = 322.97 lb

In order to get the design angle, we will solve by:

(sinϕ)/(sin 30) = 400/322.97, where ϕ is the design angle.

therefore

sinϕ = (400/322.97) × sin 30

sinϕ = 1.2385 × 0.5

sinϕ = 0.61925

ϕ = sin^(-1) 0.61925

ϕ = 38.26°

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The amount of metabolic energy expended by the bird is 39.2 J.

Energy is the ability to perform work in physics. It might exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another. Energy is always assigned based on its type once it has been transmitted. Thus, heat transmitted may appear as thermal energy while labor performed may result in mechanical energy. Motion is a property of all energy types. For instance, if a body is moving, it possesses kinetic energy. Even while at rest, a tensioned object like a spring or bow has the ability to move; this is due of its design, which includes potential energy.

E = mgh = (0.20)*(9.8)*(20) = 39.2 J

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That identical spaceship takes around a year to get to mars.

The Earth's axial wobble is stabilized by the Moon, the biggest and brightest object in our night sky, leading to a typically stable climate. As a result, Earth is a more hospitable planet. Moreover, it produces tides, which result in a rhythm that has guided mankind for a very long time. The following calculation must be performed to determine how long it will take the same spacecraft to reach Mars given that Mars is 140 times further away from Earth than the Moon and that a spacecraft can traverse the 386,400 kilometers between the Earth and the Moon in 3 days:

140 x 3 = 420 days

This spaceship will travel from Earth to Mars in just about one year and two months, assuming a year has 365 days.

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