a person can see clearly up close, but cannot focus on objects beyond 72.0 cm. she opts for contact lenses to correct her vision. part a part complete is she nearsighted or farsighted? is she nearsighted or farsighted? she is nearsighted. she is farsighted. previous answers correct part b part complete what type of lens (converging or diverging) is needed to correct her vision? what type of lens (converging or diverging) is needed to correct her vision? converging lens. diverging lens. previous answers correct part c what focal-length contact lens is needed ? templatessymbols undoredoresetkeyboard shortcutshelp f

The Speed of 5.625 x 10¹⁴m/s will traverse in vacuum.

Maxwell not only developed a complete electromagnetic theory expressed in Maxwell's equations, but also brought all the work done by such great physicists as Oersted, Coulomb, Gauss, Michael Faraday, and his own insights. to develop electromagnetism. Maxwell's equations contain the most important laws of electricity and magnetism.

[tex]E/M=c[/tex]

[tex]E=esin[2\pi -wT]\\\\B=msin[2\pi -wt][/tex]

Maxwell calculated the speed of electromagnetic waves and found that the speed of electromagnetic waves is almost the same as the speed of light.

Maxwell's first equation tends to give a special form of Coulomb's law called Gauss's law of electricity.

speed = 1.5 x 3.75 x 10¹⁴=5.625 x 10¹⁴m/s

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The change in internal energy of car will be 13.5 cal.

The internal energy of an ideal gas is a good approximation of a real system. In such a system, particles in an ideal gas appear as point objects that collide with each other in a perfectly elastic way. The actual behavior of monatomic gases (helium, argon, etc.) reflects this model.

For an ideal gas, the internal energy is proportional to the number of moles of gas and its temperature: U = cnT

Gibbs free energy is increasing as the curve of entropy.

The first law of thermodynamics states that the increase in internal energy is equal to the total heat input plus the work done by the environment. For isolated systems, it remains constant.

Q=u+w

u=Q-w

=13.5cal

since no reaction happened.

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For the photoelectric effect, the expected observations for a particle theory of light are 1,3, and 6 and 2,4,5 for a wave theory of light.

The particle theory of light defines that light consists of minute particles. Light consists streams of small particles known as photons and travels in straight lines at great speeds which is reflected from mirrors in a predictable way. Wave theory of light suggests that light has a wave character and that it travels in a medium called ether as a longitudinal wave and undergoes diffraction and interference. The wave-particle duality theory states that waves can exhibit particle-like properties while particles can exhibit wave-like properties. Hence, based on the basic definition, the statement 1, 3, and 6 respond to particle theory of light and statements 2,4, and 5 respond to wave theory of light.

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The force needed to hold a 0.003 kg sheet of paper and keep it from falling is equal to 0.0294 N.

According to Newton's 3rd law of motion, when two objects interact and exert force on each other, these forces are called action-reaction pairs. Force can be defined as a push or pull exerted resulting in its interaction with another.

From the second law of motion, the force is equal to mass time acceleration in the case of free fall gravitational acceleration.

Given the mass of the sheet paper, m = 0.003 Kg

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

The weight of the sheet of paper can be calculated as:

W = mg

W = 0.003 ×9.8

W = 0.0294 N

Therefore, the force required to prevent the paper from keep falling will be equal to 0.0294 N.

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A paper clip can certainly float on the water's surface, seemingly defying the rules of physics. The paper clip, which has a significantly higher density, can float on the water due to the strong surface tension.

The forces that hold liquid molecules together create the phenomenon known as surface tension.

A glass of water's surface molecules coheres more strongly with molecules that are directly related to them because they aren't surrounded by water molecules on all sides. It is less likely that a "skin" will develop on the water's surface the higher the cohesion between the water molecules as opposed to the water's attraction.

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The best approximation is 201.0 [tex]in^{2}[/tex]

we know that

The area of the circle is equal to

[tex]A= \pi r^{2}[/tex]

In this problem we have

r =8 in

[tex]\pi =3.14[/tex]

substitute

A= (3.14) ([tex]8^{2}[/tex]) =201.0 [tex]in^{2}[/tex]

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For an ideal gas in a sealed container, if pressure and volume are made double, then : B.) temperature is now four times its original value.

Ideal gas is an hypothetical condition of gas state where molecules of the gas are spaced widely apart that is the inter molecular force of attraction is negligible. It obeys the equation,

PV = n RT

Here, P is the absolute pressure of the gas

V is Volume occupied by the gas

n is number of moles of gas

R is Gas constant

T is Absolute temperature of the gas

Ideal gas at two different states are given as:

((P1).(V1))/(T1) = ((P2).(V2))/(T2)

Given, P2 = 2*P1, V2 = 2*V1

So, ((P1).(V1))/(T1) = ((2*P1).(2*V1))/(T2)

1/T1 = 4/T2

T2 = 4 times of T1

Temperature of the gas becomes four times on doubling the absolute pressure and temperature of gas.

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The recessional velocity is 9,771,241 m/s.

Step 1: The redshift of a faraway galaxy is determined by measuring the shift of its spectral lines compared to similar lines from nearby galaxies. The redshift is usually expressed as a ratio in terms of how much the wavelength of each line has shifted from its original value.

Step 2: The hydrogen alpha emission line has a known rest wavelength of 6562 angstroms. This means that the observed wavelength of 6782 angstroms is shifted from its rest wavelength by a factor of 1.03.

Step 3: The redshift of a galaxy can be converted into a recessional velocity in km/s by using the Hubble Law, which states that the recessional velocity of a galaxy is proportional to its redshift.

Step 4: To calculate the recessional velocity, the formula V = H0 x z is used, where V is the recessional velocity, H0 is the Hubble Constant, and z is the redshift.

Step 5: The Hubble Constant is currently estimated to be 70 km/s/Mpc, so using the formula, the recessional velocity of the faraway galaxy is 70 km/s/Mpc x 1.03 = 71.1 km/

Recessional velocity is the speed at which an object is moving away from an observer. This is typically measured in kilometers per second and is used to measure the expansion of the universe. It is calculated by measuring the wavelength shift of an object's light, which increases as the object moves away from the observer.

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The second child should be at 1.6 m in order to balance the seesaw.

The equation of torque is given as,

τ = r * F sinθ

where, r is the distance from the fulcrum

F is the force

From the above equation, as the seesaw is in equilibrium, this means that left side is equal to right side, we can write

τ₁ = τ₂

r₁ * F₁ = r₂ * F₂

In order to calculate the amount of torque the right side is providing to the system, we need to find out the distance r₂ that the person on the right is sitting with respect to the fulcrum.

300 * 2 = 375 * r₂

r₂ = 600/375 = 1.6 m

Thus, the second child should sit at 1.6 m in order to balance the seesaw.

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The magnetic flux decreases through the coil.

Due to a change in the angle between B and the coil's axis, the flux decreases.

Magnetic flux :

The magnetic field and the vector corresponding to the coil's area form a dot product, which determines the flux through the coil. The latter vector has a magnitude equal to the coil's area and a direction perpendicular to the plane in which the coil's area is located. The vector S is the vector representing the area of the coil, much like in the attached image. The flux will therefore be at its highest when the vector S points in the same direction as B, and at its lowest when their angles are perpendicular.

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A 710 kg k g car drives at a constant speed of 23 m/s and is subject to a drag force of 500 N. The required power to drive the car on the ground is 11.5 kW

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

P = W/Δt

Where:

W = work done

Δt = time period

Since W = F . s  

Hence,

P = F . s/Δt = F . v

Where:

F = force acted on the object

s = distance

v = velocity

Parameters given in the problem:

F = 500 N

v = 23 m/s

Hence, the required power is:

P = (500) (23 ) = 11,500 Watt = 11.5 kW

Your question is incomplete, but most probably your question was:

A 710kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car on level ground?

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The electric and magnetic fields at far zones are 1.66 and 628.33 (...).

With the use of electricity and other types of artificial and natural illumination, invisible energy fields known as electric and magnetic fields (EMFs) and radiation are created.

The sole difference between the total energy (electrical plus magnetic) is that the B field energy rises as the E field energy falls. The magnetic component of the EM wave causes a current in the antenna when it is a coil, such as those employed in long/medium wavelengths.

Both antenna designs have the same distribution of electric and magnetic energy in the far field. Accelerating charges also create radiating fields in addition to the reactive field; stationary charges and charges travelling at constant speed do so. Reactive fields are created as a result of the continual charge drift caused by DC sources.

The complete calculation is attahced.

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Without violating the new speed limit rules, one can go faster than the old limit.

Because c=velocity includes displacement as it is a vector, one may move faster with a velocity meter than the traditional speed restriction. As a result, it will enable the passengers to go in a straight line without veering off the road, and it will assist them get there much quicker than the old approach without breaking the law.

As indicated above, following the displacement rather than the actual distance might let someone arrive at their goal considerably more quickly without violating the new velocity limit.

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Answer:

On the other hand, acceleration is inversely proportional to the mass of the body being accelerated. That is, the greater the mass, the less acceleration.

Explanation:

The reason for the initial angular momentum is law of conservation of momentum and its value is constant.

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Answer:

'brightness' and 'place' (?)

Explanation:

You can tell the distance in both simple and complicated ways; for instance, some methods like using luminosity don't work for all stars*

quote for better understanding:

"Farther methods are usually based on identifying what type of star a given star is, and estimating its luminosity .."

"..We then measure its apparent brightness (how bright it looks)* and do some math to figure out how far away it is."

(more detailed quote):

"By knowing the actual brightness and comparing it to the apparent brightness seen from Earth (that is, by looking at how dim the star has become once its light reaches Earth), they can determine the distance to the star."

Alternatively by observing the position of the star or its place a similar technique is used:

quote:

"Earth orbits the Sun, so it is in a slightly different position in January than in July. Nearby stars will seem to slightly shift in position in our sky relative to far-away stars."

In conclusion-- luminosity is commonly how astronomers know that stars are not all the same distance away from us.

Atoms' surrounding electron clouds can serve as diffraction gratings and x-ray scattering sites. This makes it possible to determine the structure of molecules as well as the solid-state structure (i.e., the lattice types and unit cell dimensions).

The principles of diffraction are based on Bragg's Law:

nλ=2dsinθ

n is the diffraction order, which is typically 1.

lambda is the radiation's wavelength of incidence

d is the distance between the lattice planes, where

is the angle between the incident radiation and the scattering plane.

Powder x-ray diffraction (PXRD), which gives the cell constants for the solid's unit cell, is used when the material is a powder.

The intensity of the diffraction peaks is utilised to determine all atom locations when the sample is a single crystal, which provides bond lengths and bond angles.

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The middle ear is the part of ear that needs equalisation when changing altitude or scuba diving.

The water pressure you are diving through will affect the pressure in your outer ear. The Tympanic Membrane, also known as the "Eardrum," is located between the outer and middle ears. If there is an imbalance in the pressure between the two ears, the Tympanic Membrane will flex, resulting in discomfort or suffering.

The Eustachian Tubes, which are used to blow air into the middle ear, work to counteract this. Since the Eardrum is the only flexible portion of the middle ear, breathing more air into the middle ear will create pressure inside the middle ear, which will then cause the Eardrum to bend back to its original position. As a result, equalisation.

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Answer:

DeeExplanation:

If the potential energy of pendulum increases then the kinetic energy decreases and if the kinetic energy increases then the potential energy decreases, thus conservation of energy remains constant.

According to the work power theorem the total energy of any object will remain constant like the sum of the kinetic and the potential energy of the object will remain constant.

The potential energy of any object is due to its position with respect to the ground. If the object is at a height of H then it will have a potential energy because some energy is given to that object against the gravity to move it to the height H.

The kinetic energy is the energy due to the velocity of the object and is given as the product of half mass to the velocity square.

we will express it in the form of the formula for better understanding:

Mechanical energy = Kinetic energy + potential energy

Now in the pendulum the motion is back and forth with respect to its mean position. So the mechanical energy (total energy) in the pendulum is the sum of the kinetic energy and the potential energy.

Now if the pendulum attains the maximum displacement from its mean position then it will have maximum potential energy and zero kinetic energy at this point.

Now if the pendulum is at the mean position now it will have maximum kinetic energy and zero potential energy at this point.At this point the potential energy totally converted to the kinetic energy.

Now at the maximum displacement the kinetic energy totally converts into the potential energy of the pendulum.

Thus If the potential energy of pendulum increases then the kinetic energy decreases and if the kinetic energy increases then the potential energy decreases.

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(a) The perpendicular component of the block's weight is  86.6 N.

(b) The parallel component of the block's weight is 50 N.

(c) The magnitude and direction of the tension needed to move the block is 103.9 N upwards.

(d) The magnitude and direction of the block's acceleration  is 4.3 m/s² upwards.

The perpendicular and parallel component of the blocks weight is calculated as follows;

The perpendicular component of the block's weight is calculated as follows;

W (n) = W cosθ

where;

W (n) = 100 x cos(30)

W (n) = 86.6 N

The parallel component of the block's weight is calculated as follows;

W (p) = W sinθ

W (p) = 100 x sin (30)

W (p) = 50 N

The magnitude of the tension needed to move the block is calculated as follows;

T = F cosθ

where;

T = 120 x cos(30)

T = 103.9 N upwards

The acceleration of the block is calculated as follows;

T - Ff - W (p) = ma

where;

m = W /g

m = 100 N / 9.8 m/s² = 10.2 kg

T - Ff - W (p) = ma

103.9 - 10 - 50 = 10.2a

43.9 = 10.2a

a = 43.9 / 10.2

a = 4.3 m/s² upwards

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If placed in groundwater, a 0.60 kg gold crown would rise by a buoyant force of almost 11.58 N. You can ascertain the same using the formula provided:

Buoyant force = density of fluid x Volume of object x gravitational acceleration

= 1000 kg/m3 x 0.60 kg/m3 x 9.81 m/s2

= 11.58 N

When an item is submerged in a fluid, buoyant force, a kind of uplifting force, is applied to that item. An entity's buoyant force is proportional to the amount of both the fluid it has evacuated.

Step 1: Calculate the volume of the crown

Mass divvied up by concentration is just the formula for calculating an item's volume. The golden crown inside this instance weighs 19.3 x 103 kg/m3 in terms of density.

Volume = 0.60 kg/19.3 x 103 kg/m3

Volume = 0.0031 m3

Step 2: Determine how much water has been displaced by mass.

The crown's volume times the water is probably density gives the amount of water that is evacuated. Freshwater has a 1,000 kg/m3 density.

Mass of water moved is 0.0031 m3 times 1,000 kg/m3.Water displacement weight is equal to 3.1 kg

Step 3: Determine the buoyant force.

The buoyant force that an item experiences is proportional to the mass of the fluid which that item has displaced. The water that was removed weighs 3.1 kg in particular instance.

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The KE of the car is 750v² J.

KE is the kinetic energy of the object which can be defined as the energy possessed by the object when it is in motion.

KE = ΔW

Where,

m = mass of the object

v = speed at which the object is moving

Mass of the car = 1500Kg

Velocity of the car = v m/sec

KE = (1/2)*m*v²

KE = (1/2)*1500*v²

KE = 750v² J

The KE a car with a mass of 1500kg running with a velocity v m/sec 750v² J.

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0.62 sec is the time that will be required by the boy jumping on trampoline to return back to the starting position.

A trampoline is an activity of jumping up and down and it defines the conservation of energy, from potential into kinetic.

It also describes Hooke's laws and the spring constant. Furthermore, it verifies and illustrates each of Newton's three laws of motion.

Time of flight = 24/g

=2×3/9.8

=0.62 sec

The three forces, acting on the boy are tension of the spring, FBD and gravity (mg).

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The magnitude of the change in the object's momentum is c)80N-sec. So, option c is correct.

The momentum is defined as the consequence of a molecule's speed and its mass. Power and movement, meaning it has both greatness and the heading. As per Isaac Newton's second condition of movement, the power following up on a molecule rises to the time pace of increment of force.

We are given that the initial momentum of the system is 0.

Using the results of Newton second law of motion, we get

F = m × a

a = F/m

a = 10/6

a = 1.67 m/s²

Now, with the help of this acceleration, we can find the final velocity of the object.

So, according to first equation of motion, we get

v = u + at

v = u + (1.67)×(8)

v = 0+13.33 m

=>v=13.33 m

Now, we know momentum is given the cross product of mass and velocity.

Therefore, p = m × v

p = 6 × 13.33

or p = 80 N-s

Hence, change in object's momentum is c)80N-sec

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(Complete question) is:

A net force of 10 newtons acts on an object of mass 6.0 kilograms for 8.0 seconds. What is the magnitude of the change in the object's momentum?

a. 48 N-s

b. 60. N-s

c. 80. N-s

d. 480 N-s

The total energy of the system is 0.01089 joules.

The mass of the object is, m = 0.35 kg

The spring constant is, k = 24.2 N/m

The amplitude of the motion is, A = 3 cm

The relationship of the total energy of the system is given by the following:

[tex]E_{T} = 1/2KA^{2}[/tex]

Substitute the values in the above relationship.

[tex]E_{T} = 1/2[(24.2 N/m (3cm * 1m/100cm)^{2} ][/tex]

   = 0.01089 joules

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The simplest ratio of squares to total shapes if we have 8 squares and 10 circles is 4:9.

What is Ratio?

A ratio is said to be is the simplest form or in the lowest term if two quantities of a ratio (i.e., antecedent and consequent) have no common factor (i.e. antecedent and consequent are co-prime) other than 1 (or their HCF is 1). The ratio must always be expressed in its simplest form or in its lowest terms.

Now,

There are 8 squares and 10 circles.

We have, total shapes = 8 + 10 = 18

Hence, The simplest ratio of squares to total shapes = 8 : 18 = 4 : 9

So, The simplest ratio of squares to total shapes is 4 : 9

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The length (a) of the first brilliant zone on either side of the central maxima is 2.62mm.

Diffraction. Waves that emerge from two independent sources and produce distinct wave fronts are said to interfere. On the other hand, diffraction can be thought of as secondary waves that form from the many components of the same wave.

Thomas Young demonstrated how the interaction of two sources of light in the same medium results in an interference pattern. both prospective and retrospective meddling.

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Mechanical energy is: True, Mechanical energy is chosen because the roller coaster choose will have large potential energy.

Mechanical energy is the sum of capability strength and kinetic energy. it's far the power related to the motion and role of an object. as an instance, a shifting vehicle possesses mechanical power in the shape of kinetic power, a compressed spring possesses mechanical power in the shape of potential power.

There are two kinds of mechanical electricity – movement (kinetic power) and saved (ability power). you can learn more in our manual that explains capacity and kinetic energy. Mechanical conversion depends on the quantity of capability energy an object has and what kind of kinetic strength it is able to produce.

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At 320° Fahrenheit, which is equal to 160° Celsius, the temperature is precisely double what it is in Celsius.

24.6C is the temperature at which a reading on the Fahrenheit scale corresponds to half of a reading on the Celsius scale.

The unit of temperature on the Celsius scale—one of the two temperature scales used by the International System of Units (SI)—is the degree Celsius. The Kelvin scale is the other temperature scale. The symbol "degree Celsius" (°C) is used to indicate both a specific temperature on the Celsius scale and a measurement of the distance or range between two temperatures. It carries the name of Anders Celsius, a Swedish astronomer who invented a scale for measuring temperature in 1742 and was born in 1701–1744.

Centigrade, which derives from the Latin centum, which means "one hundred," and gradus, which means "steps," was the name of the measurement until 1948, when Anders Celsius was honoured with the new moniker. Most powerful countries utilise this scale.

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