The force of attraction that holds two atoms together within a molecule is

Answer:

Explanation:There are two types of shapes egg shaped and elliptical.

Planets and some celestial bodies can have trajectory around sun in egg shape or elliptical and this path is known as orbit. And the reason behind this shape is force of gravity between two objects depends upon the square of distance between them. If you double the distance between objects ,attractive force gets quarter.If you double the distance it drops to fourth.Issac newton demonstrated mathematically that this path can be would be parabola ellipse or a hyperbola.But hyperbola and parabola are open ended so if any thing in space enters in this path will gets disappear after one time.And Kepler also showed us that ellipses are closed so planets we see in orbits remain stick around.

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The efficiency of the engine is 1.57%.

Efficiency is a measure of how well a system converts input energy into useful output energy. It is calculated as the ratio of useful output energy to the total input energy.

To find the efficiency of the engine, we need to calculate the work done by the engine and the heat absorbed from the reservoirs during the cycle.

Step 1: Isothermal expansion at 325 K from 16.1 L to 31.5 L

Since this is an isothermal process, the temperature remains constant at 325 K. The work done by the engine during this process is given by:

W1 = nRT ln(V2/V1)

where n is the number of moles of the gas, R is the universal gas constant, and T is the temperature in kelvin.

n = 1 mol

R = 8.314 J/mol/K

T = 325 K

V1 = 16.1 L

V2 = 31.5 L

W1 = (1 mol)(8.314 J/mol/K)(325 K) ln(31.5 L/16.1 L)

W1 = 4527.6 J

The heat absorbed from the reservoir during this process is given by:

Q1 = W1 = 4527.6 J

Step 2: Cooling at constant volume to 163 K

Since this is a constant volume process, no work is done by the engine. The heat absorbed from the reservoir during this process is given by:

Q2 = nCvΔT

where Cv is the heat capacity at constant volume and ΔT is the change in temperature.

n = 1 mol

Cv = 21 J/K

ΔT = 163 K - 325 K = -162 K

Q2 = (1 mol)(21 J/K)(-162 K)

Q2 = -3402 J

Step 3: Isothermal compression to its original volume of 16.1 L

Since this is an isothermal process, the temperature remains constant at 163 K. The work done on the engine during this process is given by:

W3 = -nRT ln(V2/V1)

where V1 = 31.5 L and V2 = 16.1 L.

n = 1 mol

R = 8.314 J/mol/K

T = 163 K

V1 = 31.5 L

V2 = 16.1 L

W3 = -(1 mol)(8.314 J/mol/K)(163 K) ln(16.1 L/31.5 L)

W3 = -4456.5 J

The heat released to the reservoir during this process is given by:

Q3 = -W3 = 4456.5 J

Step 4: Heating at constant volume to its original temperature of 325 K

Since this is a constant volume process, no work is done by the engine. The heat released to the reservoir during this process is given by:

Q4 = nCvΔT

where Cv is the heat capacity at constant volume and ΔT is the change in temperature.

n = 1 mol

Cv = 21 J/K

ΔT = 325 K - 163 K = 162 K

Q4 = (1 mol)(21 J/K)(162 K)

Q4 = 3402 J

The net work done by the engine is given by the sum of the work done during steps 1 and 3:

Wnet = W1 + W3 = 4527.6 J - 4456.5 J = 71.1 J

The net heat absorbed from the reservoirs is given by the sum of the heat absorbed during steps 1 and 2, and the sum of the heat released during steps 3 and 4:

Qnet = Q1 + Q2 + Q3 +Q4 = 4527.6 J - 3402 J + 4456.5 J - 3402 J = 2179.1 J

The efficiency of the engine is given by:

η = Wnet/Q1 = 71.1 J/4527.6 J = 0.0157 or 1.57%

Therefore, the efficiency of the engine is 1.57%.

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Explanation:

sexual reproduction provides genetic diversity because the sperms and the egg that are produced contain different combination of the genes than the parent organisms so in order to from a new organisms two gamete the sex cells sperm and egg must fuselage further mixing the gene to produce more genetic diversity

Explanation:

Sexual reproduction increases genetic variation in offspring, which in turn increases the genetic variability in species. You can see the effects of this genetic variability if you look at the children in a large family and note how each person is unique. Imagine this kind of variability expanded to include all the families you know (not to mention all the families of all the sexually reproducing organisms on Earth), and you begin to get a feel for the dramatic genetic impact of sexual reproduction

Refrigerant oil boiling pressure The boiling pressure of refrigerant oil is determined by the temperature of the system. This temperature varies depending on the pressure exerted on the oil. The refrigerant oil will boil at a different temperature for each refrigerant.

The boiling point of refrigerant oil can be estimated by determining the boiling pressure at a certain temperature of the system. The approximate boiling pressure of refrigerant oil in a system ranges from 20 to 30 psig. However, this value may vary depending on the type of refrigerant used in the system. The refrigerant oil can also be changed depending on the type of refrigerant used in the system.The type of refrigerant used in the system will also affect the boiling pressure of refrigerant oil. A refrigerant is a substance that changes from a liquid state to a gaseous state at a specific temperature. It is used in refrigeration systems to transfer heat from one location to another. The refrigerant oil is added to the system to ensure that all parts of the system are lubricated. This prevents the parts from grinding together and causing damage.

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\( \large \mathfrak{Solution : }\)

Capicity of the septic tank is :

(i) capicity = 24 m³

(ii) capicity = 24 × 1000000 = 24000000 litres (cm³)

The circuit shown is as follows Both the given resistors are in parallel, and the equivalent resistance for two resistors in parallel can be calculated using the following formula:

1/req = 1/r1 + 1/r2For the values given,1/req = 1/10 + 1/7= 0.217So,req = 1/0.217= 4.61 Ω

Now we can calculate the value of current ix using Ohm's Law, which is given by:

Ohm's law is a statement that the amount of electric voltage in a conductor is directly proportional to the electric current flowing through the conductor. This law is named according to the last name of its originator, Ohm, who was presented in a journal in 1827, based on his experimental results measuring the amount of voltage and electric current from various networks.

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Answer:

d

Explanation:

im pretty sure. just makes the best sense. If im wrong im very sorry.

Answer:

D

Explanation:

because its right

Answer:

Hamid

Explanation:

I got it right on my test

Answer:

the answer to the first one is B and the second one is c I hope I got them right

Answer:

its Solid

Explanation:

Molecules in the solid phase has the least amount of energy, while the gas particles has the greatest amount of energy.

Answer:

Solid

Explanation:

Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles.

OFF GOOGLE

Answer:

No, he is not correct. Xenon is not very reactive since it is located in the group of noble gases. The noble gases are all chemically unreactive gases.Elements within different groups within the periodic table have different physical and chemical properties. Hope this answers the question.

Explanation:

Yes

Sample Response: Lorenzo is not correct. Nonmetals increase in reactivity from left to right because nonmetals on the right have more valence electrons. They need to gain fewer electrons to have a full outer shell. However, this trend only continues until group 17, because the noble gases already have a full outer shell. Therefore, their reactivity is the least of all the elements.

~theLocoCoco

In the Bohr model of the hydrogen atom, the potential energy of an electron in a particular orbit is given by the formula:

U = - (2.18 * 10^-18 J) / n^2

Where U is the potential energy, n is the principal quantum number representing the orbit.

To calculate the potential energy of the atom when it moves up to the next higher Bohr orbit, we need to consider the change in the principal quantum number.

Let's assume the initial orbit has a principal quantum number of n1, and the next higher orbit has a principal quantum number of n2 = n1 + 1.

The potential energy in the initial orbit is given as U1 = -1.20 * 10^-19 J.

Substituting these values into the formula, we have:

U1 = - (2.18 * 10^-18 J) / n1^2

U2 = - (2.18 * 10^-18 J) / (n1 + 1)^2

To find the potential energy in the next higher orbit, we can calculate U2 as:

U2 = - (2.18 * 10^-18 J) / (n1 + 1)^2

Now, we can substitute the given values and calculate U2:

U2 = - (2.18 * 10^-18 J) / (n1 + 1)^2

U2 = - (2.18 * 10^-18 J) / (n1^2 + 2n1 + 1)

Please provide the value of n1 so that we can calculate the potential energy in the next higher Bohr orbit.

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That depends on the values of the resistors.

If the same two resistors are used in both cases, then the total resistance is more in series and less in parallel.

Here's a catchy little factoid for ya:

-- In series, the total resistance is more than the biggest single one.

-- In parallel, the total resistance is less than the smallest single one.

Answer:

When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%.

Answer:

when liquid water is cooled it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that it expands slightly until it reaches the freezing point and then when it freeze it expands by Approximately 9percent

The neutron number can be calculated by subtracting the atomic number from the mass number. In this case, 54 - 23 = 31. Therefore, the neutron number is 31.
To determine the element identity, we need to find the element with a mass number of 54 and a proton number of 23. This can be done by looking at the periodic table. Based on these numbers, we know that the element has 23 protons, which places it in the 23rd position on the periodic table. The element with the atomic number 23 is vanadium (V). Therefore, the element identity is vanadium (V).
In summary, for an element with a mass number of 54 and a proton number of 23, the neutron number is 31 and the element identity is vanadium (V).
To determine the neutron number and element identity, you can use the given mass number (A) and proton number (Z).
1. Neutron number:
Neutron number = Mass number (A) - Proton number (Z)
Neutron number = 54 - 23
Neutron number = 31
2. Element identity:
Since the proton number (Z) is also the atomic number, you can use it to identify the element. With an atomic number of 23, the element is Vanadium (V).
In summary, for the element X with mass number 54 and proton number 23, the neutron number is 31, and the element is Vanadium (V).

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Answer: Heating from the crust and mantle.

Explanation: Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust.

The convection currents that cause this cycle to take place is driven by heating from the crust and mantle. Hence, option (a) is correct option.

A crucial idea that illustrates the changes between the three primary rock types is the "rock cycle" (metamorphic, igneous and sedimentary). Simply put, it is a series of processes that create and modify the various types of rocks found in the Earth's crust.

The solid crust of Earth serves as a heat insulator for the planet's warm interior. The molten rock in the mantle, below the crust, is known as magma. Convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make up the earth's crust shift as a result of these currents.

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Answer:

2

Explanation:

2

Option C, its speed doubled, and the acceleration and kinetic energy remain the same.

The momentum of a truck is the product of its mass and velocity. If the momentum of the truck is increased by a factor of 2, then its velocity must also increase by a factor of 2 to maintain the same mass. This means that option C, its speed doubled, is correct.
Acceleration is the rate at which an object's velocity changes over time. It is directly proportional to the net force acting on an object and inversely proportional to its mass. Therefore, if the weight of the truck does not change, its acceleration will not change either, making option A incorrect.
On the other hand, the kinetic energy of an object is directly proportional to its mass and the square of its velocity. Therefore, if the velocity of the truck doubles, its kinetic energy will increase by a factor of 4. This means that option D, its kinetic energy doubled, is also incorrect.

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The chart shows that the geothermal power station has an efficiency of 15%. This means that only 15% of the energy produced by the station is used to produce electricity while 85% of the energy is lost in the process of generating electricity.

Efficiency is the measure of how much useful work output is produced per unit of input energy. It can be used to compare the effectiveness of different types of energy production methods, such as geothermal, coal, oil, gas, and renewable sources like solar and wind power.

The efficiency of an energy conversion process is always less than 100% since some energy is always lost as heat due to friction or other forms of energy dissipation. In the case of the geothermal power station, energy is lost due to the heat transfer process of the water and the energy lost during the electricity generation process.

Efficiency is an important factor in energy production because it affects the cost and sustainability of the production process. High efficiency means that more energy is produced per unit of fuel used, which reduces the cost of producing energy. It also means that less fuel is needed to produce the same amount of energy, which reduces the environmental impact of energy production.

Therefore, improving the efficiency of energy production methods is an important goal for energy producers and policymakers around the world.

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Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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Which statement describes the path of electrons from a battery to a circuit?

The correct answer would be:

C. Electrons move away from the negative end of a battery and then

through the circuit toward the positive end of the battery.

Answer: v = 0.6 m/s

Explanation: Momentum Conservation Principle states that for a collision between two objects in an isolated system, the total momentum of the objects before the collision is equal to the total momentum of the objects after the collision.

Momentum is calculated as Q = m.v

For the piñata problem:

\(Q_{i}=Q_{f}\)

\(m_{p}v_{p}_{i}+m_{s}v_{s}_{i}=m_{p}v_{p}_{f}+m_{s}v_{s}_{f}\)

Before the collision, the piñata is not moving, so \(v_{p}_{i}=0\).

After the collision, the stick stops, so \(v_{s}_{f}=0\).

Rearraging, we have:

\(m_{s}v_{s}_{i}=m_{p}v_{p}_{f}\)

\(v_{p}_{f}=\frac{m_{s}v_{s}_{i}}{m_{p}}\)

Substituting:

\(v_{p}_{f}=\frac{(0.54)(4.8)}{(4.4)}\)

\(v_{p}_{f}=\) 0.6

Immediately after being cracked by the stick, the piñata has a swing speed of 0.6 m/s.

If someone would like to lease state-owned lands for oil and gas production, they should negotiate with the appropriate government agency responsible for managing the lands.

In the United States, this agency is typically the Bureau of Land Management (BLM), which manages millions of acres of federal lands, including lands with potential for oil and gas development. The BLM offers competitive leasing programs that allow individuals and companies to bid on leasing rights for specific parcels of land. The leasing process typically involves submitting an application, conducting an environmental analysis, participating in a lease sale auction. Ultimately, negotiation and leasing of state-owned lands for oil and gas production is subject regulations and oversight by  government agency responsible for managing  lands.

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Answer:

Explanation: heat of fusion

Answer:

9000 Joules

Explanation:

Potential energy = mass x acceleration due to gravity x height

mass = 20kg

acceleration due to gravity = 10m/s2

height = 45 meters

20 x 10 x 45 = 9000 Joules

The law of physics that this scenario would violate is the law of conservation of energy.

The law of conservation of energy states that energy possessed by an object or physical body can neither be created nor destroyed but can only be transformed from one form to another.

This ultimately implies that, the energy possessed by the rock at the beginning must be equal to the energy possessed by the rock at the end in accordance with the law of conservation of energy.

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The problem states that the rate at which the intensity of a vertical beam of light decreases in a transparent medium is proportional to the thickness of the medium. It is given that in clear seawater, the intensity 1 meter below the surface is 25% of the initial intensity of the incident beam. The task is to find the intensity of the beam 6 meters below the surface.

Let's denote the initial intensity of the incident beam as I₀. According to the given information, the intensity 1 meter below the surface is 25% of I₀, which means it is 0.25I₀.

Since the rate of intensity decrease is proportional to the thickness of the medium, we can set up a proportion using the ratio of intensities:

I₁ / I₀ = \(e^{-kt}\)

where I₁ is the intensity at a depth of t meters, and k is the proportionality constant.

To find the intensity 6 meters below the surface, we substitute t = 6 into the equation:

I = I₀ *  \(e^{-6k}\)

We don't have the specific value of k or I₀, but we can still determine the ratio of intensities:

I / I₀ =  \(e^{-6k}\)

Using the given information, we can write the equation:

0.25I₀ / I₀ =  \(e^{-6k}\)

Simplifying the equation, we find:

0.25 = \(e^{-6k}\)

To solve for the intensity I, we substitute this value back into the equation:

I = I₀ * 0.25.

Therefore, the intensity of the beam 6 meters below the surface is 0.25 times the initial intensity I₀.

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