Calculate the change in the enthalpy of argon, in kj/kg, when it is cooled from 100 to 25oc. if neon had undergone this same change of temperature, would its enthalpy change have been any different?

The mean velocity of helium atoms at room temperature (t~300k) and the de broglie wavelength is 1.3635 * 105 cm/s  and 0.73 Armstrong respectively

In 1923, Louis-de-Broglie presented the notion of De-Broglie waves, that were also later tested with and proven by Davisson and Germer in 1927. These waves describe the nature of the particle-related wave.

Another variation of the de Broglie wavelength formula exists for particles having mass, such as electrons, protons, and so on, but not for photons. At non-relativistic speeds, a particle's momentum is equal to its rest mass m multiplied by its velocity v.

The de Broglie wavelength is measured in meters. Because it is so little, it is measured in nanometres or Angstroms.

Uavg = √(3KT/M)

Uavg = √((3×1.38〖×10〗^(-23)×300K)/(4×1.67×〖10〗^(-27) ))

Uavg = 1.3635 * 105 cm/s

λ = h/ mv

λ = (6.67×〖10〗^(-34))/((4×1.67×〖10〗^(-27))×(1.3635×〖10〗^3))

= 0.7323 * 10-10 m

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We can select the cases in the order of selection matters 254,251,200

Permutation is the act of putting all the members of a set into a sequence or order in mathematics. In other words, if the set is already sorted, the act of reordering its pieces is known as permuting. Permutations may be found in practically every branch of mathematics, at varying degrees of prominence. They frequently appear when alternative orderings on finite sets are examined. The permutation formula is as follows.

nPr = ((n!) )/((n-r)!)

nPr = ((50!) )/((50-5)!)

nPr = ((50!) )/((45)!)

nPr = ((50*49*48*47*46*45)!)/((45)!)

nPr = 11441304000/45

nPr = 254,251,200

Therefore, there are 254,251,200 ways to select these cases if order of selection matters.

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Answer : Natural

Explanation : Natural resources are the resources that are found in the environment and are developed without the intervention of humans

He has derived a lot of equations but the most common one is E=mc^2

(Energy=Mass×Speed of light squared)

No. this is not true for a spherical capacitor.

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Answer:Доброе утро, отв

Explanation:

Доброе утро, отвДоброе утро, ответт

The length of the shortest curve would be √2.

The paraboloid x2 + y2 = z2 + 1 is a doubly ruled surface, which means, it can be swept out by a moving the line in space in two different ways.

So, then we have to verify the fact that the line defined by the two given points lies entirely on the surface of the paraboloid.

The vector valued function that describes the straight line connecting the points (1, 0, 0) and (1, 1, 1) is

r (t) = < 1, t, t >, t ∈ R

and it can be stated by inspection that this satisfies the equation of the paraboloid.

Thus, it is found that the length of the line segment connecting the points is √2

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The particle with a velocity of 4 m/s and with an acceleration 10 m/s2 in a sec will travel a distance of: 9 m

The formula for Uniformly varied rectilinear motion (UVRM) and procedure we will use to solve this exercise is:

x = (vi* t) + (a * t²)/2

Where:

Information about the problem:

Applying the distance formula, we have:

x = (vi* t) + (a * t²)/2

x = (4 m/s * 1 s) + (10 m/s² * (1 s)²)/2

x = 4 m + (10 m/s² * 1 s²)/2

x = 4 m + (10 m)/2

x = 4 m + 5 m

x = 9 m

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

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The change in internal energy is -48 joule.

We need to know about internal energy to solve this problem. For a closed system, with matter transfer excluded, the changes in internal energy are due to heat transfer and due to thermodynamic work done by the system on its surroundings. It can be determined as

ΔU = Q - W

where ΔU is the change in internal energy, Q is heat and W is work done.

From the question above, we know that

W = 74 joule

Q = 26 joule

By substituting the given parameter, we can calculate the change in internal energy

ΔU = Q - W

ΔU = 26 - 74

ΔU = -48 joule

The internal energy change is negative because the work done on the system is greater than the heat released.

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The solubility of oxygen in water increases with the increase in the partial pressure of oxygen at a constant temperature and concentration.

The amount of chemical substance that can dissolve in water at a specific temperature can be known as the solubility in water. The unit of solubility is generally in mg/L (milligrams per liter) or ppm (parts per million).

In the water the oxygen gets dissolved when the Oxygen is absorbed in water by direct diffusion and by surface-water agitation. The Solubility of oxygen in water is so small and by diffusion process alone in still water, it was calculated that it would take 6 years for oxygen to diffuse from surface to a depth of 6 meters in quiet water.

So, the  solubility of oxygen in water increases with the increase in the partial pressure of oxygen at a constant temperature and concentration.

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The moment applied is 40 Nm.

We need to know about torque to solve this problem. Torque is the rotational equivalent of linear force. It can be determined as

τ = F x r

where τ is torque, F is perpendicular force and r is radius.

From the question above, the parameter given are

F = 200 N

r = 20 cm

Convert radius to meter

r = 20 cm

r = 20 x 10¯² m = 0.2 m

By substituting the parameters, we get

τ = F x r

τ = 200 x 0.2

τ = 40 Nm

Hence, the moment applied is 40 Nm

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The density of the material is p =5.6 sl/ft^3 .

What is density?

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Latin letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho). Density is mathematically defined as mass divided by volume.

The difference between an object's weight in a normal atmosphere and its weight inside water determines the force of buoyancy for an object of any shape:

Fb = Fw atm - Fw water

= 8.05 lb - 5.26 lb

=2.79 lb

We may determine the density of an object's structure by knowing its weight in the standard atmosphere, buoyant force, and water density:

p = (p h2o. Fw atm)/ Fb

putting the values and calculating we get :

p =5.6 sl/ft^3

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The result of two or more vectors is the outcome.  it's the outcome of multiplying two or more vectors.  The resultant result of adding the displacement vectors A, B, and C are vector R. An appropriately drawn, scaled, vector addition diagram is often used to compute vector R, as illustrated within the diagram.

What do three resultant vectors add up to?

Afbeeldingsresultat for these vectors' offspring

The outcome of multiplying vectors A + B + C is the same as that of multiplying vectors B + A + C or even C + B + A.  The resultant result will be the same as long as all three vectors are present with the appropriate magnitude and direction. The resultant of two or more vectors is the outcome.

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The wavelength of electromagnetic waves is 2.88 meters.

We need to know about electromagnetic waves to solve this problem. Electromagnetic waves can propagate without media. The speed of electromagnetic waves in vacuum media is equal to the speed of light. Hence, the wavelength and frequency can be determined as

c = λ . f

where c is the speed of light (3 x 10⁸ m/s), λ is wavelength and f is frequency.

From the question above, we know that

f = 104.3 MHz = 104.3 x 10⁶ Hz

By substituting the given parameter, we can calculate the frequency of radiowaves

c = λ . f

3 x 10⁸ = λ . 104.3 x 10⁶

λ = (3 x 10⁸) / (104.3 x 10⁶)

λ = 2.88 m

Hence, the wavelength of radiowaves is 2.88 meters.

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The cannonball dropped of a 65 m high castle wall will be in the air a time of: 3.642 s

The free fall formula and the procedure we will use is:

t = √[ (2*h) / g]

Where:

Information of the problem:

Applying the time formula we get:

t = √[ (2*h) / g]

t = √[ (2*65 m) / 9.8 m/s²]

t = √[ 130 m / 9.8 m/s²]

t = √[ 13.265 s²]

t = 3.642 s

It is when the object or mobile falls from a height (h) with a positive acceleration equal to the gravity, describing a vertical rectilinear travel.

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The Initial Temperature of the Iron sphere is 253.40 C.

When two items are connected by a permeable barrier and there is no net energy flow between them, they are said to be in thermal equilibrium. This does not imply that no energy passes between the objects in thermal equilibrium; rather, an equal amount of energy flows back.

Thermal equilibrium can also relate to how heat is distributed within a single, isolated body.

Given,

Specific heat of iron = 470 J/KgC

Specific heat of water = 4200 J/KgC

Temperature of Water = 10 C

Final Temperature of Iron = 30 C

Initial Temperature of Iron = T

Heat lost by Iron = Qlost

                             = Miron SΔT

                             = (200/1000) * 470 * (T-30)

Heat gain by water = Qgain

                                 = Mwater SΔT

                                 = (500/1000) * 4200 * 10

According to the thermal equilibrium,

Qlost = Qgain

=> (200/1000) * 470 * (T-30) =  (500/1000) * 4200 * 10

=> T- 30 = 223.40

=> T = 253.40 C

Thus, the Initial Temperature of the Iron sphere is 253.40 C.

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(a) The speed as the stone hits the ground is 29.4 m/s (b) The distance at which the stone fell is 44.1 m.

Speed can be defined as the ratio of distance to time.

(a) To calculate the speed at which the stone hit the ground, we use the formula below.

Formula:

Where:

Substitute the values above into equation 1

(b) To calculate the distance the stone fell, we use the formula below.

Where:

Solving for S by substituting into equation 2

Hence, (a) The speed as the stone hits the ground is 29.4 m/s (b) The distance at which the stone fell is 44.1 m.

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230km far does it travel during 14.2 minutes.

A car travels straight down a highway with cruise control set to = 100 km/h

how far does it travel during 14.2 minutes

so, now we use

Distance = velocity [tex]\times[/tex] time

1 min = 1/60 hour

14.2 min = 14.2 / 60 hour

= 0.23 hour

now,

Distance = 1000[tex]\times[/tex]0.23 km

= 230km

so.  230km  it travel in 14.2 minutes

Distance is the length of the path between two points. and it's standard unit is meter while displacement is shortest distance between final position and initial position and it also has meter as a standard unit.

written as m.

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By applying the wave equation, the wavelength is 2.68 meters.

We need to know about wave equations to solve this problem. The displacement of the wave on the y-axis can be explained by the wave equation

y = A cos (kx - ωt)

where y is y-axis displacement, A is amplitude, k is wave number, x is x-axis displacement, ω is angular speed and t is time.

the wavenumber and angular speed of the wave equation can be determined respectively by

k = 2π / λ

ω = 2πf

where k is the wavenumber, λ is wavelength and f is frequency.

From the question above, we know that:

f = 0.5 Hz

A = 0.35 m

v = 1.34 m/s

When the amplitude is doubled, it doesn't affect the wavelength. Hence

v = λ . f

1.34 = λ . 0.5

λ = 2.68 m

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Answer:

The reason that the Greeks might not have had any questions to the evidence that heavier objects fall faster than light objects is because they would be questioning statistics which is that heavier objects and lighter objects do not fall at different rates but at the same its just the pending on the weight ex. a brick and a feather you drop a brick it falls quick because of its weight and a feather because of it's weight it falls a lot slower but at the measurement of the objects falling quicker than the other they don't its irrelevant.

The kinetic and potential energy of a harmonic oscillator in motion

d) are perfectly anti-correlated.

A restoring force in a harmonic oscillator works in the direction of an equilibrium point.

Simple harmonic motion, which we refer to as repetitive motion, is produced by the force.

The system's mechanical energy, which includes both potential and kinetic energy, is ideally constant.

In actuality, the energy is preserved by allowing one quantity to grow as the other shrinks, and vice versa.

An anti-correlation is a term that describes a negative correlation.

Kinetic energy and potential energy are two types of energy that are frequently found in mechanical systems and are referred to as mechanical energy in physics.

The idea of mechanical energy conservation is based on an even more general principle known as the law of conservation of energy; the only distinction is that in mechanical energy conservation, all of the system's energy is either in the form of kinetic energy, potential energy, or both.

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It would decrease cardiac output, peripheral resistance, and blood volume.

Cardiac output (CO), the volume of blood the heart pumps each minute, is the mechanism through which blood circulates throughout the body, particularly supplying the brain and other crucial organs with blood flow. When exercising, for example, the body's need for oxygen fluctuates, and changing both heart rate (HR) and stroke volume affects cardiac output (SV).

As a result, a complicated mechanism combining the autonomic nervous system, endocrine, and paracrine signaling pathways is responsible for controlling cardiac output. Every tissue in the body depends on the heart to pump blood to it in order to survive, hence any cardiovascular failure could have a large negative impact on morbidity and mortality.

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The work done on a 50 Kg student by the elevator in 2 seconds if the elevator is accelerating upwards from rest at a rate of 2 ms⁻² would be

The total amount of energy transferred when a force is applied to move an object through some distance.

The work done is the multiplication of applied force with displacement.

Work Done = Force × Displacement

As given in the problem we have to find the work done  on a 50 Kg student by the elevator in 2 seconds if the elevator is  accelerating upwards from rest at a rate of 2 ms⁻²,

Lets us first calculate the displacement of the elevator in 2 seconds if it is accelerating upwards from rest at a rate of 2 ms⁻².

s = ut + 0.5at²

  = 0 + 0.5×2×2²

  = 4 meters

The work done on the elevator = mgh

                                                    =50×9.81×4

                                                    =1962 joules

Thus, the work done on the elevator would be 1962 joules.

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(a) If she wishes to land on the other bank directly at a point directly across from her starting point, the direction she must swim is 50.3⁰ north east.

(a. ii) The time of her motion is 111.8 seconds.

(b) If she wishes to cross the shortest possible time, then she must swim the shortest possible distance. Her direction must be 90 degrees and she will swim 50 m north.

The time taken for the swimmer to land on the other bank directly at a point directly across from her starting point is calculated as;

(V₁t)² = (d²) + (V₂t)²

where;

0.7t² = 50² + 0.5t²

0.7t² - 0.5t² = 50²

0.2t² = 2500

t² = 2500/0.2

t² = 12,500

t = √12,500

t = 111.8 seconds

Resultant displacement = V₁t = 0.7 m/s x 111.8 s = 78.26 m

cos θ = adjacent side / hypotenuse side

cos θ = 50 m / 78.26 m

cos θ = 0.6389

θ = arc cos(0.6389)

θ = 50.3⁰

Thus, if she wishes to land on the other bank directly at a point directly across from her starting point, the direction she must swim is 50.3⁰.

If she wishes to cross the shortest possible time, then she must swim the shortest possible distance. Her direction must be 90 degrees and she will swim 50 m north.

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To connect the wires in a 110 block and trim off the excess at the same time, use a punch down tool with a notched blade and point the cut side of the tool towards the wire end.

A 110 block is used to terminate wiring in a cabling system. It is a type of punch down block. This block has a plastic base and have 50 slots for individual wires, meaning it can terminate 25 pairs.

A punch down tool is used insert wire into insulation displacement connectors present in punch down blocks such as 110 block and also in other electrical panels and modules.

Therefore, to connect the wires in a 110 block and trim off the excess at the same time, use a punch down tool with a notched blade and point the cut side of the tool towards the wire end.

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Answer: No, they cannot

Explanation:

Because every individual has different emotions, different beliefs.

It is needed to connect seven solar panels in series to get 3.5 volts.

We need to know about the power supply circuit to solve this problem. When the power supply are connected in series, the total voltage is added up. It can be written as

V = V1 + V2 + .... + Vn

From the question above, we know that

V = 3.5 volt

Veach = 0.5 volt

Hence, we can calculate how many solar cells connected in series

V = V1 + V2 + .... + Vn

3.5 = 0.5(n)

n = 3.5 / 0.5

n = 7

Thus, we need to connect seven solar panels in series to get 3.5 volt.

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By unit conversion, the flow rate is 600,000 liters/min or 158503.23 gallons/min.

We need to know about unit conversion to solve this problem. The unit conversion can be used to convert a unit to another unit. It can be defined as

a = xb

where a is unit a, b is unit b and x is the constant of conversion.

From the question above, we know that

Q = 10 m³/s

Convert to liters / min

Q = 10 m³/s

Q = 10 x1000 liters/(1/60 min)

Q = 600,000 liters/min

Convert to US gallons/min

Q = 600,000 liters/min

Q = 600,000 x 0.264 gallons/min

Q = 158503.23 gallons/min

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Answer:

moving

Explanation:

Magnetic north was drifting at a rate of up to about 9 miles (15 km) a year. Since the 1990s, however, the drift of Earth's magnetic north pole has turned into “more of a sprint,” scientists say. Its present speed is about 30 to nearly 40 miles a year (50-60 km a year) toward Siberia.

The zone in the map that has the greatest amount of land area suitable for people to live is zone B.

The equator is the imaginary line that divides the earth horizontally into two equal halves of North and South zones.

The countries that are located close to the equator include the following:

Ecuador, Colombia,

From the map, the zone with the greatest amount of land area suitable for people to live is the zone closest to the equator which is zone B.

The temperature of these areas are close to moderate through out the year.

The zone B also contains land mass that is part of the largest continent which is Asia.

Therefore, the zone in the map that has the greatest amount of land area suitable for people to live is zone B.

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