Ernest rutherford was a prominent scientist who contributed significantly to the theory of atomic structure. True or false?.

The term “electric field” refers to the physical field that surrounds electrically charged particles and acts to either attract or repel all other charged particles in the field (also known as an E-field).

It can also refer to the physical field surrounding a system of charged particles. Electric fields are composed of electric charges and time-varying electric currents.

Both electric and magnetic fields are manifestations of the electromagnetic field, one of the four fundamental interactions (sometimes known as forces) of nature.

Electrical technology makes use of electric fields, which are significant in many branches of physics.

For instance, in atomic physics and chemistry, the electric field acts as an attractive force to hold atoms’ atomic nuclei and electrons together. It is also the force that causes atoms to chemically link together to form molecules.

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The demand for widgets has a price elasticity of 0.5. If we assume no change in the demand curve for widgets, an increase in sales of 8 percent implies a(n) 32% reduction in price.

The basic formula for the price elasticity of demand coefficient is:

Percentage change in quantity being demanded/percentage change in the price

Demand elasticity the price elasticity of demand (PED) of a good is a measurement of how responsive the quantity demanded is to the price.

Almost all goods see a decrease in quantity demanded when prices rise, however certain goods experience this decrease more than others.

When a price increases by 1% while all other factors remain constant, the price elasticity provides the percentage change in the quantity required. If the elasticity is 2, a 1% increase in price results in a 2% decrease in the amount demanded.

Other elasticities gauge how changes in other factors affect the quantity needed (e.g., the income elasticity of demand for consumer income changes).

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By using ideal gas approximation, the sun's temperature is 2.27 x 10⁷ K.

We need to know about ideal gas to solve this problem. The ideal gas will follow the rule

P . V = n . R . T

where P is pressure, V is volume, n is the amount of substance, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that:

Mr = 2 g/mol

ρ = 1.4 g/cm³

P = 1.3 x 10⁹ atm = 1.32 x 10¹⁴ Pa

m(sun) = 1989 x 10³⁰ g

Find the amount of sun substance

n = m / Mr

n = 1989 x 10³⁰ / 2

n = 994.5 x 10³⁰ mol

Find the volume of sun

V = m/ρ

V = 1989 x 10³⁰ / 1.4

V = 1420.71 x 10³⁰ cm³

V = 1.42 x 10²⁷ m³

By substituting the parameters, we get

P . V = n . R . T

1.32 x 10¹⁴ . 1.42 x 10²⁷ = 994.5 x 10³⁰ . 8.31 . T

T = 2.27 x 10⁷ K

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a) mass of object with acceleration 32.5 ft/sec2 is 116 kg

b) mass of object with acceleration 7.86 m/sec2 is 146 kg

Given:

Force = 1.15 x 10^3 N

Acceleration = a) 32.5 ft/sec2 b) 7.86 m/sec2

Solution: The definition of force in physics is: The push or pull on a massed object changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

Force = mass x acceleration

mass(a) = Force/Acceleration

= 1.15 x 10^3 N/32.5 ft/sec2 x 3.2808 ft/m = 116 kg

mass(b) = 1.15 x 10^3 N/7.86 m/sec2 = 146 kg

Hence, mass of object with acceleration 32.5 ft/sec2 is 116 kg

Hence, mass of object with acceleration 7.86 m/sec2 is 146 kg

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Operating capital - Operating capital refers to that amount of cash required to run day to day working or operation of business .

Total Operating Capital = Total assets (short term + long term)  - current liabilities  

total assets include inventories, accounts receivable , fixed assets etc.

current liabilities include account payables, accrued expenses, income tax accrued interest etc.

NOWC means net operating working capital it is difference between current assets and non interest bearing current liabilities

Current assets include cash accounts receivable and inventories and exclude marketable securities

Non interest bearing current liabilities means amount of money company must pay within a year without own interest.

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Valid line of code for displaying the twenty-eighth element of some array is System.out.println(somearray[27]).

Arrays are among the most well-known and essential data structures, and they are utilized by practically all programs. A wide variety of additional data structures, including lists and strings, are likewise implemented using them. They successfully take advantage of computers' addressing systems. The memory is a one-dimensional array of words whose indices are their addresses in the majority of contemporary computers and many external storage devices. Array operations are frequently optimized for by processors, especially vector processors.

The main reason why arrays are helpful is that the element indices may be calculated in real time. This feature, among other things, enables a single iterative statement to process an array's items in any number.

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The approximate radius is 6370 Km

The radius of the Earth is approximately 3,960 miles, while the radius of the Moon is approximately 1,080 miles.

Earth is the third planet from the Sun, the largest of the solar system's four terrestrial planets, the planet with the highest density, and the only planet in our solar system known to support life.

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Digital camera demand is inelastic if the price elasticity of demand is 0.88, meaning that price rises for cameras will result in higher overall sales.

Price elasticity of demand measures how much a product's consumption changes in response to price changes. If a good's price elasticity is infinite, it is perfectly elastic (if demand changes substantially even with minimal price change). The good is elastic if price elasticity is more than 1, and inelastic if it is less than 1. A good is completely inelastic if its price elasticity is zero, meaning that no amount of price variation will alter demand. The quantity effect will be overpowered by the price effect. The relationship between the percentage change in a product's quantity demanded and the percentage change in price is known as price elasticity of demand. It helps economists comprehend how supply and demand shift in response to changes in a product's price.

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To increase the electric force between two charged particles by a factor of 16, we D. Increase one particle's charge by a factor of 16.

Electric force is the force of attraction between two charged particles.

The magnitude of the electric force is given by F = kq₁q₂/r² where

Given that we have two charged particles q₁ and q₂ separated by a distance r, the electric force betwen them is given by F = kq₁q₂/r²

Now, if we want to increase the force by a factor 16, we have the new force F' = 16F

F' = 16kq₁q₂/r²

F' = k16q₁q₂/r²

F = k(16q₁)q₂/r² or kq₁(16q₂)/r²

This implies that either one of the charged particles q₁ or q₂ is increased by a factor of 16

So, to increase the electric force between two charged particles by a factor of 16, we D. Increase one particle's charge by a factor of 16.

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Jennifer runs 5 miles east, then stops to take a break. after her break, she continues running 4 more miles east.

In this the total distance she covers is 9 miles and the total displacement is also the same as the distance that is 9 miles.

Displacement is the shortest distance between initial and final position, or we can say it is the straight-line distance between initial and final position.

Whereas distance is considered as the total path length covered from initial position till the final position. The Displacement of a body is always less than or equal to the distance.

Displacement can be zero in case the initial and final positions coincide, but distance can never be zero.

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Force required to move a block is 1.615 N

Given:

mass of block = m = 150 pounds = 68 kg

distance = d = 5 ft = 1.52 metres

time = t = 8 sec

To Find:

force required to move the block

Solution: Force is defined as product of mass and acceleration and it's unit is N or Newton.

Velocity = displacement/ time = 1.52 / 8 = 0.19 m/s

Acceleration = velocity/time = 0.19/8 =

0.023 m/s^2

Force = mass x acceleration = 68x0.023 = 1.615 N

Hence, force required to move the block is 1.615 N

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The flow rate of incoming solar energy, as measured at the top of the atmosphere is called: insolation

The insolation is known as the amount of radiation from the sun's energy that the planet receives. A portion of the energy is absorbed or reflected by the atmosphere and another portion reaches the surface.

The insolation is caused major by:

The solar energy is a type of energy whose source is the sun that radiates heat.

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The volume of the solid is [tex]V=128\frac{r^{3} }{3}[/tex]

What do you understand by Volume ?

A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Although there are many different units that can be used to indicate volume, the most common ones are liters, cubic meters, gallons, milliliters, teaspoons, and ounces.

base is x2+y2=(2r)2

==>y=-√(4r2-x2) ,√(4r2-x2)

So each cross section parallel has base = √(4r2-x2) - -(√(4r2-x2)) = 2√(4r2-x2) and height = base

So area of each cross section is 2√(4r2-x2)*2√(4r2-x2)= 4(4r2-x2)

Now we integrate from left side of circle to right side of circle (-2r to 2r)

V = 4 ∫[ -2r to 2r] (4r2-x2)dx

V = 4 (4r2x - x3/3) [ -2r to 2r]

V = 4 [(4r2(2r) - (2r)3/3) - (4r2(-2r) - (-2r)3/3)]

V = 4 [ (8r3 - 8r3/3) - (-8r3 + 8r3/3)]

V = 4 (16r3 - 16r3/3)

V = 4 (32r3/3)

V = 128r3/3

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The frequency does the other car hear after they pass each other is 631.8 Hz.

The frequency heard by the second car is calculated as follows;

f = f'(v/v - vs)

where;

f = 595(343/343 - 20)

f = 631.8 Hz

Thus, the frequency does the other car hear after they pass each other is 631.8 Hz.

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Carbon dioxide and water vapor are the two principal atmospheric gases that absorb solar energy.

Gases in the atmosphere of the Earth are referred to as atmospheric gases. While greenhouse gases (carbon dioxide, methane, nitrous oxide, water vapor, and ozone) only make up 1% of the air, they make up the majority of these gases, which account for 99% of the air's composition. Several separate gases, each with unique characteristics, are actually mixed together to form the air. Air's chemical makeup changes throughout time. It could change over time and from location to location. There are also some varying elements in the air in our environment. Water vapor, dust particles, and ozone are some of these changeable elements. The weather and environment can be significantly impacted by these, despite their rarity and low concentration.

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1.549×10-19lJ is the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =7 to =1.

The equation E= hcE =hc, where h is Planck's constant and c is the speed of light, describes the inverse relationship between a photon's energy (E) and the wavelength of light ().

The Rydberg formula is used to determine the energy change.

Rydberg's original formula used wavelengths, but we may rewrite it using units of energy instead. The result is the following.

aaΔE=R(1n2f−1n2i) aa

were

2.17810-18lJ is the Rydberg constant.

The initial and ultimate energy levels are ni and nf.

As a change of pace from

n=5 to n=3 gives us

ΔE

=2.178×10-18lJ (132−152)

=2.178×10-18lJ (19−125)

=2.178×10-18lJ×25 - 9/25×9

=2.178×10-18lJ×16/225

=1.549×10-19lJ

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The average speed of the complete round trip is 65.57 km / h.

We need to know about the average speed to solve this problem. The average speed can be determined as the total distance divided by the total time. It can be written as

v = d / t

where v is average speed, d is distance and t is time.

From the question above, we know that

d1 = 300 km

v1 = 93 km/h

t lunch = 1 hour

d2 = 300 km

v2 = 56 km/h

Find the time during the outgoing

v1 = d1 / t1

t1 = d1 / v1

t1 = 300 / 93

t1 = 3.23 hours

Find the return time

v2 = d2 / t2

t2 = d2 / v2

t2 = 300 / 56

t2 = 5.36 hours

Hence, the total time

t = t1 + t2 + t lunch

t = 3.23 + 5.36 + 1

t = 9.59 hours

Find the average speed

v = d / t

v = (300 + 300) / 9.59

v = 65.57 km / h

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Proportional scale or Proportion wheel are terms used to describe the process of preparing illustrations for expansion or reduction.

What is the proportional principle?

The relationship between two or more elements in a design and how they stack up against one another is known as proportion. When there is a proper size or quantity relationship between the elements, proportion is said to be harmonic.

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The mass of nitrogen is calculated as 1.092 grams

According to Dalton's Law of partial pressure:

Pn2 = Ptotal Xn2

Were,

Pn2is the partial pressure of nitrogen

Ptotal is the Total pressure

Xn2is the mole fraction of nitrogen

Given:

Total pressure = 1.0 atm

Mole fraction of nitrogen = 0.78

Partial pressure of nitrogen:

Pn2= 1.0 x 0.78 atm

According to Henry's law:

Solubility = Henry's constant (k)×Partial pressure

k = 6.26×10⁻⁴ mol/L-atm

Thus,

Solubility of nitrogen = 6.26×10⁻⁴ mol/L-atm×0.78 atm = 4.8828×10⁻⁴ mol/L

Given: Volume = 80.0 L

So, Moles of nitrogen gas dissolved:

Moles = Solubility (Concentration dissolved) ×Volume

Moles = 4.8828×10⁻⁴ mol/L×80.0 L = 0.0390 moles

Also,

moles = mass (m) / molar mass (M)

mass of nitrogen = moles x molar mass

Molar mass of nitrogen gas = 28 g/mol

So,

Mass of nitrogen gas dissolved = 0.0390 moles×28 g/mol = 1.092 grams

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The deceleration of the rocket sled if it comes to rest in 1.1 s from a speed of 1000 km/h is  [tex]252.52\ m/s^2[/tex].

The acceleration in opposite direction is known as the deceleration. Basically the deceleration is negative value of the acceleration since the negative sign depicts its opposite in direction.

The given data:

time, t = 1.1 s

initial speed, u = 1000 km/h = [tex]\frac{2500}{9}\ m/s[/tex]

final speed, v = 0 m/s

So we will be using the equation of motion, that is,

v = u + at

[tex]\therefore 0=\frac{2500}{9} + a(1.1)[/tex]

[tex]\Rightarrow a=-\frac{2500}{9(1.1)}[/tex]

[tex]\therefore a = - 252.52 \ m/s^2[/tex]

Hence , the deceleration of the rocket is  [tex]252.52\ m/s^2[/tex].

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The average speed of a horse that gallops a distance of 10 km in a time of 30 min is: b. 20km/h.

The formula and procedure we will use to solve this problem is:

v = x/t

Where:

Information about the problem:

By converting the time units from (min) to (h) we have:

t = 30 min * 1 h/60 min

t= 0.5 h

Applying the velocity  formula we get:

v = x/t

v = 10 km/0.5 h

v = 20 km/h

It is a physical quantity that indicates the displacement of a mobile per unit of time, it is expressed in units of distance per time, for example (miles/h, km/h).

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The current that can flow in the secondary is 23 A

According to Transformation ratio,

[tex]V_{p}[/tex] / [tex]V_{s}[/tex] = [tex]I_{s}[/tex] / [tex]I_{p}[/tex]

where,

[tex]V_{p}[/tex] = Voltage across the primary coil

[tex]V_{s}[/tex] = Voltage across the secondary coil

[tex]I_{s}[/tex] = Current in the primary coil

[tex]I_{p}[/tex] = Current in the secondary coil

Given that,

[tex]V_{p}[/tex] = 110 V

[tex]V_{s}[/tex] = 24 V

[tex]I_{p}[/tex] = 5 A

[tex]V_{p}[/tex] / [tex]V_{s}[/tex] = [tex]I_{s}[/tex] / [tex]I_{p}[/tex]

110 / 24 = [tex]I_{s}[/tex] / 5

[tex]I_{s}[/tex] = 22.9 = 23 A

Transformation ratio is the ratio of secondary voltage to primary voltage.

Therefore,  The current that can flow in the secondary is 23 A

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The level (n) of the final state of the electron n₂ = 6

a photon, also known as a light quantum, is a very small energy package of electromagnetic radiation. When explaining the photoelectric effect in 1905, Albert Einstein proposed the potential of energy levels packets during the transmission of light.

A negatively charged subatomic component called an electron can be either attached to or detached from an atom (not bound). Protons, neutrons, and electron that is bonded to the atom make up the three basic types of particles that make up an atom. Protons, neutrons, and electrons make up the nucleus of an atom.

An atom of hydrogen has a value of 1.0952 x 10-6 m

starting at level 1, the electron n = 3

what is the electron's final state level (n).

[tex]\frac{1}{\lambda}=\bar{v}=R_H\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)[/tex]

λ =   1.0952 x 10⁻⁶m

  = 1.0952 x 10⁻⁴cm

R[tex]_H[/tex] = 109677cm⁻¹

n₁ = 3

n₂ = ?

Putting the value in the formula:

we get,

1/1.0952 x 10⁻⁴ = 109677cm⁻¹[tex]\left(\frac{1}{3^2}-\frac{1}{n_2^2}\right)[/tex]

0.0833 = 1/9 - 1/(n₂)²

(n₂)² = 1/0.0278

n₂ = 6

The level (n) of the final state of the electron n₂ = 6

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One of the fundamental general safety guidelines is to keep the work area clear of combustibles for at least 35 feet from the hot work area.

Hot works or combustible works such as welding, heating or cutting should be done at a location which is far away form any combustible material.

Prior to start working in such a location make sure there are no hazardous or combustible material around such as fire, ignition source or electric spark.

All precautionary measures must be taken to confine heat, fire or spark so that they don not come into contact with nay combustible object.

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In the canopies of tropical forests, plants are able to survive despite the high temperatures and high levels of solar radiation due to the process of Transpiration.

Most of the water absorbed by roots of water is not used for growth of plant but to maintain a moisturized environment. For this purpose water is evaporated as vapour from stoma on the underside of leaves.

This process is called transpiration. Transpiration is the evaporation of water from plants. This cools down plants under hot conditions. This process also pulls water from stems and roots to leaves to hydrate mesophyll cells.

Therefore, In the canopies of tropical forests, plants are able to survive despite the high temperatures and high levels of solar radiation due to the process of Transpiration.

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The radius is equal to the Earth’s radius. You can find this information online by computing the Earth’s surface area while assuming that it is a perfect sphere, then multiplying the result by the percentage of the planet that is covered in water.

Actually, you can demonstrate this without knowing the radius.

P/A = e•s•T4

Water has an emissivity, e, of roughly 0.96. And 5.67108 W/m2 K4 is the Stefan-Boltzmann constant.

The power radiated from a black body is described by the Stefan-Boltzmann law in terms of its temperature. The Stefan-Boltzmann constant, often known as the proportionality constant, is derived from several well-known physical constants.

Where k is the Boltzmann constant, h is the Planck’s constant, and c is the speed of light in a vacuum, the constant has the value since 2019

When compared to a black body, a body that does not completely absorb incident radiation (sometimes referred to as a grey body) emits less total energy.

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Answer:

23.63985719

Explanation:

pls dont ask it was painfull

Answer:

Thermal

Thermalphenomena.

Sound

Soundphenomena.

Mechanical

Mechanicalphenomena.

Light

Lightphenomena.