Why can't scientists see inside an atom?

Solar constant never change, and hence there is no change in shortwave as well as longwave radiation by the earth's atmosphere

Solar constant is the rate at which the solar energy from the sun intercepts the earth's surface. It's value is 1,338watts per square meter.

Long wave radiation is a type of radiation emitted from earth whose wavelength ranges from 4 to 30 micrometers. While shortwave radiation is the radiant energy which is produced by the sun whose wavelength ranges from infrared to ultraviolet through visible.

We know that solar constant never change (constant), and the amount of shortwave that reaches the earth's atmosphere is called solar constant. As the solar constant does not change, there will be no change in shortwave as well as longwave radiation by the earth's atmosphere.

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The substances listed in order of increasing boiling point (lowest first) are C2H6, CH3CHO, C2H5OH, and CH3COOH.

C2H6 is a non-polar molecule, meaning it has no permanent dipole moment. The intermolecular forces holding the molecules together are van der Waals' forces, which are weak and require the least amount of energy to overcome.

CH3CHO is a polar molecule due to the carbonyl group, which creates a permanent dipole moment. The intermolecular forces holding the molecules together are dipole-dipole forces, which are stronger than van der Waals' forces.

C2H5OH and CH3COOH are both polar molecules due to the presence of the hydroxyl group (-OH) and the carboxyl group (-COOH), respectively. The intermolecular forces holding the molecules together are hydrogen bonds, which are much stronger than dipole-dipole or van der Waals' forces.

The order of boiling points can be explained by the strength of the intermolecular forces. C2H6 has the weakest intermolecular forces, so it requires the least amount of energy to overcome them and boil. CH3CHO has stronger dipole-dipole forces than C2H6, so it requires more energy to boil. C2H5OH and CH3COOH both have hydrogen bonds, which are the strongest intermolecular forces, so they require the most energy to overcome and boil.

In summary, the boiling point depends on the intermolecular forces present, which are determined by the polarity of the molecule and its molecular mass. Polar molecules with hydrogen bonding have stronger intermolecular forces and higher boiling points.

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The total torque created by the two known masses is 1.848 Nm.

We can use the formula for torque, which is given by:

τ = F x r x sin(θ)

where τ is the torque, F is the force applied, r is the distance from the pivot point to the point where the force is applied, and θ is the angle between the force and the lever arm.

For the first mass (193.1 g), the force applied is the weight of the mass, which is:

F1 = m1 x g = 0.1931 kg x 9.81 m/s^2 = 1.893 N

The distance from the pivot point to the point where the force is applied is half the length of the meter stick, which is:

r1 = L/2 = 0.5 m

The angle between the force and the lever arm is 90 degrees, so:

θ1 = 90 degrees

Using these values, we can calculate the torque created by the first mass as:

τ1 = F1 x r1 x sin(θ1) = 1.893 N x 0.5 m x sin(90 degrees) = 0.9465 Nm

For the second mass (183.9 g), we can follow the same procedure and find:

F2 = m2 x g = 0.1839 kg x 9.81 m/s^2 = 1.803 N

r2 = L/2 = 0.5 m

θ2 = 90 degrees

τ2 = F2 x r2 x sin(θ2) = 1.803 N x 0.5 m x sin(90 degrees) = 0.9015 Nm

The total torque created by the two known masses is the sum of these individual torques, which is:

τtotal = τ1 + τ2 = 0.9465 Nm + 0.9015 Nm = 1.848 Nm

Therefore, the total torque created by the two known masses is 1.848 Nm.

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Answer:

A

Explanation:

Liquid water changes into water vapor because of an increase in the kinetic energy of the particles option (C) is correct.

A material changing from one physical form to another is known as a change of state.

When heated or cooled, the matter may transform from one state to another. When heated, ice (a solid) turns into water (a liquid).

This process is known as MELTING. When heated, the water turns into steam (a gas).

Thus, liquid water changes into water vapor because of an increase in the kinetic energy of the particles option (C) is correct.

The question is incomplete.

The complete question is:

Which of the following causes liquid water to change into water vapor?

A. a decrease in the motion of the particles

B. a decrease in the randomness of the particles

C. an increase in the kinetic energy of the particles

D. an increase in the attraction between the particles

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The object's velocity-time graph is provided, and we need to determine the true statement about the motion of the object.

From the velocity-time graph, we can observe the following key features. Firstly, the graph shows a positive constant slope, indicating a constant positive velocity. This implies that the object is moving in a straight line with a consistent speed in a positive direction. Secondly, the graph is a straight line without any changes in slope, indicating that the velocity remains constant throughout the object's motion.

Based on these observations, the true statement about the object's motion is that it is moving with a constant velocity in a straight line. The graph's linear nature and constant slope suggest that the object maintains the same speed and direction without any changes in its motion over time.

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explanation

the general form of wave equation is

       y=Asin(kx-wt)

we have

      y=5sin(3x-4t)

hence the angular frequency

     w= 4s^-1

the frequency

  f=w/2 pi

  f=4/2 pi

  f=4/2*3.14

  f=0.64 hz

the period

T=1/f

T=1/0.64

T=1.5625=1.6

the wavelength

k=2 pi/lambda

lambda=2 pi/k

k=3

so

lambda=2*3.14/3

lambda=2.09

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Answer: 2

Explanation:

Answer:

they're negative bc a proton is positive. a proton attracts an electron by the fact that opposite charges attract each other, while two electrons repel each other. Thus it shows that polarity of the charge on an electron and a proton is opposite.

Explanation:

The potential difference is 0.063 V.

The potential difference is defined as the work done in moving a charge of 1 coulomb from one point to another.

An electron microscope is a microscope that uses an accelerated beam of electrons.

The formula given by De Broglie for the wavelength is as follows:

λ is the wavelength.

λ = h / p

 = h / mv

 = h / √2×m×q×V

where h is planks constant

q is the charge

m is the mass

4.5 * 10⁻⁹  = 6.63 * 10⁻³⁴ / √(2×9.31×10⁻³¹×1.6×10⁻¹⁹×V)

On solving for V we get

V = 0.063 V

Hence, the potential difference is 0.063 V.

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Answer:

Explanation:

The properties of magnets are used to make electricity. Moving magnetic fields pull and push electrons. ... Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.

The volume of the triangular shape is 10.35 km³.

In geometry, volume is the amount of space enclosed by a three-dimensional object. It is measured in cubic units, such as cubic meters or cubic centimeters. The volume of a regular object can be calculated using a formula, while the volume of an irregular object can be calculated by dividing it into smaller regular objects and adding up their volumes.

For example, the volume of a cube with a side length of 1 meter is 1 cubic meter. The volume of a sphere with a radius of 1 meter is 4/3π cubic meters. The volume of a cylinder with a radius of 1 meter and height of 2 meters is 2π cubic meters.

The formula gives the volume of a triangular shape:

V = 1/2 * b * h * t

where:

b is the base of the triangle

h is the height of the triangle

t is the thickness of the triangle

In this case, we have:

b = 7 km

h = 1.9 km

t = 3 km

So now, the volume of the triangular shape is:

V = 1/2 * 7 km * 1.9 km * 3 km = 10.35 km³

Therefore, the volume of the triangular shale is 10.35 km³.

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Moving from the element with atomic number 10 to atomic number 11 on the periodic table changes observed are :

Reactivity increases,

Sodium has more shell,

Valence electrons in sodium are farther from the nucleus,

Atomic number 11 does not have a full electron shell

In increasing order of atomic number, the elements are listed. The amount of protons in an atom's nucleus is indicated by its atomic number. An element's identity is determined by its proton count. The number of protons determines an element's identity.

The indirect relativistic effect amplifies the decreases in the binding energies of the valence d and f electrons as they move down the periodic table. As a result, the d electrons in the heavier coinage metals become more chemically active, leading to higher oxidation states in these elements.

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Answer:

C. Visible light

Explanation:

Visible light is responsible for the colors of objects.

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Object is Placed at Infinity; Object is Placed between Infinity and Optical Center ; Image is virtual

As mentioned in the video lecture, the heat transfer problem to find the unknown thermal conductivities of the rods in our experiment can be approximated as 1-Dimensional heat conduction along the axis of the rods (or radial direction for a solid disc experiment) and Transient heat conduction.

The correct option is:1

Dimensional heat conduction along the axis of the rods (or radial direction for a solid disc experiment)Transient heat conduction.Thermal conductivity is a characteristic of a material that determines how easily heat can pass through it. We will use a simple model for the heat transfer that occurs in this experiment. It is a 1-Dimensional heat conduction along the axis of the rods (or radial direction for a solid disc experiment).

Heat will flow from the hotter end to the colder end of the rods, and the thermal conductivity of the rods can be calculated by measuring the temperature profile along the length of the rods over time.This model is valid only if the heat transfer is steady-state, and if the thermal properties of the material are constant, such as thermal conductivities. However, in our experiment, the heat transfer is not steady-state but transient. This means that the temperature distribution along the length of the rods will change with time.

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Both location 1 and location 2 produces equal energy per day for identical wind turbines.

average velocity of location 1 is=wind velocity of initial 12 hours + wind velocity of final 12 hours.

It means, in initial 12 hours velocity is =5×12×60×60=216000m/sec

Similarly, velocity of wind after 12 hours =15×12×60×60=648000m/sec.

So, average velocity at location 1=(216000+648000)/24×60×60

                                                     v=864000/86400=10m/sec

Similarly, we find average velocity at location 2

In initial 12 hours velocity is =0m/sec

and in final 12 hours=20m/sec or 20×12×60×60=864000m/sec.

So average velocity of wind at location 2=(8640000)/24×60×60=10m/sec.

Since, we have velocity, and we are also given wind turbines at both of locations is identical. It means kinetic energy of wind at both locations will be equal.

Hence, both locations produces equal energy.

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Answer:

plastics are susceptible to degradation due to ultraviolet (UV) light from the sun. With enough exposure, UV light can cause a chemical reaction in the plastic, which results in scission, or severing, of those big polymer molecules.

Explanation:

Answer:

the short answer is yes and sun or strong uv lights

Explanation:

LEDs cannot melt plastic fixtures as they just do not get that hot, not even at the base These new bulbs are based on field-induced polymer electroluminescent (FIPEL) technology, with a twist. Without heat as a continual stressor, the polymer should remain stable for years. Any kind of light bulbs, from fluorescent to incandescent to halogen, can cause fires if they are not used correctly. As more heat is put into the plastic, more bonds are broken and the material becomes more like a liquid and less like a solid. Semi-crystalline polymers have a melting temperature which is the point at which the secondary bonds in the crystalline regions break. At this point the mateiral is completely liquid. There is melt and there is soften. Certainly they soften and become weak in sunlight both by the heat and by the UV degredation of the plastic. Unfortunately, the plastics used for garbage bags have a low melting point but by design, they should not melt in strong sunlight. the underlined sentences are the most important

The volume of aluminum that contains the same number of atoms as 9.0 cm³ of mercury is approximately 0.622 cm³.

To find the volume of aluminum that contains the same number of atoms as 9.0 cm³ of mercury, we need to consider the densities and molar masses of the two elements.

First, let's find the number of atoms in 9.0 cm³ of mercury. To do this, we need to know the density of mercury, which is approximately 13.6 g/cm³.

Using the density formula: density = mass/volume, we can find the mass of 9.0 cm³ of mercury. mass = density × volume mass = 13.6 g/cm³ × 9.0 cm³ mass ≈ 122.4 g

Next, we need to convert the mass of mercury to the number of atoms. To do this, we use Avogadro's number, which tells us the number of atoms in one mole of a substance.

Avogadro's number is approximately 6.022 × 10²³ atoms/mol.

Number of atoms = (mass in grams / molar mass) × Avogadro's number

The molar mass of mercury is 200.59 g/mol. Number of atoms = (122.4 g / 200.59 g/mol) × (6.022 × 10²³ atoms/mol) Number of atoms ≈ 3.68 × 10²² atoms

Now, let's find the volume of aluminum that contains the same number of atoms. We'll use the molar mass and density of aluminum. The molar mass of aluminum is 26.98 g/mol, and the density is 2.70 g/cm³.

First, we calculate the mass of aluminum:

mass = (number of atoms / Avogadro's number) × molar mass mass

= (3.68 × 10²² atoms / 6.022 × 10²³ atoms/mol) × 26.98 g/mol mass

≈ 1.68 g

Next, we find the volume of aluminum using its density:

volume = mass / density volume = 1.68 g / 2.70 g/cm³

volume ≈ 0.622 cm³

Therefore, the volume of aluminum that contains the same number of atoms as 9.0 cm³ of mercury is approximately 0.622 cm³.

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A) Q1 = (3/2)P1V1[A – 1]

B) W2 = P1V1(In A)

C) W3 = P1V1(1 – A)

The only source of energy for a monatomic ideal gas (such as helium, neon, or argon) is translational kinetic energy.

A) first law of thermodynamics we have;

ΔU = Q – W

Where,

ΔU = change in internal energy

Q = the heat absorbed

W = the work done

the first process occurs at constant volume, the work done is zero:

Thus,

ΔU = Q – 0

ΔU = Q

The change in internal energy is;

ΔU = nCvΔt

where;

n = number of moles of the gas

R =  gas constant,

Cv =  specific heat at constant volume

Δt = change in temperature i.e T2 – T1.

Using the ideal gas law, find an n and Δt

P1V1 = nRT1

n = P1V1/RT1

T1 = P1V1/nR

the specific heat at constant volume is Cv = (3/2)R

From the question, pressure has reached AP1, calculate the temperature T2 by using the ideal gas law;

AP1V1 = nRT2

T2 = AP1 V1/ nR

heat added in terms of p1, V1, and A

Q = ΔU = nCv(T2 – T1)

From earlier

T1 = P1V1/nR

Putting equation of T2 and T1 into the energy equation;

Q = nCv((AP1 V1/ nR) – P1V1/nR)

Q = Cv • P1V1/R (A – 1)

we saw that Cv = (3/2)R. Thus,

Q = (3/2)R • P1V1/R (A – 1)

Q = (3/2)P1V1[A – 1]

B) Here again, work done in step 2 in terms of p1, V1, and A.

The process is an isothermal process because temperature is constant; so work done W = nRT In(V2/V1)

T = T1  (temperature is constant)

From earlier,

n = P1V1/RT1 and

But in this process, it’s

n = P1V1/RT1 and thus,

V2 = nRT2/P1

Also,  T2 = AP1 V1/ nR

V1 = nRT2/AP1

Putting the values into, W = nRT In(V2/V1),

W = (P1V1/RT1) • RT1 • In((nRT2/P1)/(nRT2/AP1)

W = P1V1(In A)

C) In step 3,we have and isobaric process because the pressure is constant.

Work done; W = P(V1 – V2)

V2 is the final volume while V1 is the the initial volume

P is P1 (isobaric process).

From earlier, we saw that,

V1 = nRT2/AP1 and V2 = nRT2/P1

And that T2 = AP1 V1/ nR

Thus,

V1 = V1 and V2 = AV1

Thus, W = P1(V1 – AV1) = P1V1(1 – A)

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I understand that the question you are looking for is "A monatomic ideal gas has pressure p1 and temperature T1. It is contained in a cylinder of volume V1 with a movable piston, so that it can do work on the outside world. Consider the following three-step transformation of the gas: The gas is heated at constant volume until the pressure reaches Ap1 (where A>1). The gas is then expanded at constant temperature until the pressure returns to p1. The gas is then cooled at constant pressure until the volume has returned to V1.

It may be helpful to sketch this process on the pVplane.

How much heat Q1 is added to the gas during step 1 of the process?

Express the heat added in terms of p1, V1, and A.

How much work W2 is done by the gas during step 2?

Express the work done in terms of p1, V1, and A.

How much work W3 is done by the gas during step 3?

If you've drawn a graph of the process, you won't need to calculate an integral to answer this question.

Express the work done in terms of p1, V1, and A."

Answer:

Please state the statements in the comment so I can help

C. Engineers come up  with  scientific questions when they are developing their design, and scientists do research to answer them

The generalization that can be made about the relative speeds that the sun and the stars move through the sky over the course of a day is that the sun appears to move much slower than the stars. This is because the sun is much closer to Earth than the stars, so its movement is more noticeable.

The stars, on the other hand, are much farther away and their movement is less noticeable.

Another way to think about this is to consider the fact that the Earth is rotating on its axis. As the Earth rotates, the sun appears to move across the sky at a relatively slow speed because it is close to Earth. The stars, however, are much farther away and their movement is not as noticeable. This is why the stars appear to move much faster than the sun over the course of a day.

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Answer:

If you ground the flow of current like the last part of your question states you will not have a complete circuit as the circuit will open on a short circuit. To make a complete circuit operate you need a power source, an overload device to protect the conductors of the circuit, conductors to carry the current and a load across the power source which causes the current to flow in the circuit.

Explanation:

Leave any one of these things out and you will not have a complete circuit.

A complete electric circuit includes a voltage source, current, wires, and load to flow the current.

An electrical load can be described as an electrical component of a circuit that consumes electrical power such as electrical appliances, bulbs, and lights. The electrical load may also refer to the power consumed by a circuit. An electrical load is opposed to a power source, such as a battery, which produces power.

If an electric circuit contains an output port, a pair of terminals that generates an electrical signal, the circuit connected to this terminal is the load. Load influences the performance of circuits according to the output voltages or currents, such as voltage sources, and amplifiers.

Mains power outlets supply power at constant voltage, with electrical appliances connected to the power circuit making up the load. When a high-power device switches on, it drastically reduces the load impedance.

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The stopping distance is 2\(v^2\) / a.

The stopping distance of a car can be determined using the formula:
Stopping distance = (initial velocit\(y^2\)) / (2 * acceleration)
In this case, the initial velocity of the car is 2.0v, and the acceleration due to braking is the same in both cases. Let's assume the acceleration is denoted by 'a'.
Substituting the given values into the formula, we have:
Stopping distance = ((\(2.0v)^2\)) / (2 * a)
                = (\(4.0v^2\)) / (2 * a)
                = 2\(v^2\) / a
Therefore, the stopping distance is 2\(v^2\) / a.

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Answer:

The frequency at which the string will create a standing wave be  with three loops is 8.6 Hz

Explanation:

The speed of the of the wave, v = 12.9 m/s

The number of loops of the standing wave = 3 loops

The length of the string = 2.00 m

Given that one loo = half of the wavelength, we have;

Three loops = 3 × half = One and half wavelength  = 1.5·λ

The frequency of a wave = f = v/λ

Therefore, we have;

The frequency, f = 12.9/1.5 = 8.6 Hz

The frequency at which the string will create a standing wave be  with three loops = 8.6 Hz.

Answer:

9.675

Explanation:

got it right on acellus

The wind direction and speed in Buffalo, NY in 12 hours will be from the south at 5 to 8 mph. The wind will become west in the afternoon.

The temperature will be a high of 78 degrees Fahrenheit. The sky will be sunny. There is no chance of precipitation.

The wind direction and speed in Buffalo, NY in 12 hours will be from the south at 5 to 8 mph. This means that the wind will be blowing from the south towards the north. The wind speed will be between 5 and 8 miles per hour. The wind will become west in the afternoon. This means that the wind will start blowing from the west towards the east. The temperature will be a high of 78 degrees Fahrenheit. This means that the temperature will be warm and comfortable. The sky will be sunny. This means that there will be no clouds in the sky and the sun will be shining. There is no chance of precipitation. This means that it will not rain or snow.

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Answer:Rate > 9 miles per hour

Solution :-

Given :

Distance 1 = 30 km

Distance 2 = 70 km

We know that speed = distance/time

and, Average speed = total distance/total time taken

When the train acquired a speed of 30 km/hr, the time taken = 30/30 = 1 hour

Average speed = 9distance 1 + distance 2)/(time 1 + time 2)

AS time 2 or t2 is time taken for the second part of the journey of 70 km

⇒ 40 = 100/(1 + t2)

⇒ 40 + 40t2 = 100

⇒ 40t2 = 100 - 40

⇒ 40t2 = 60

⇒ t2 = 60/40

⇒ t2 = 1.5

So, t2 or time taken to travel the second part of the journey is 1.5 hours.

Speed of the second part of the journey = distance 2/time 2

⇒ 70/1.5

⇒ 46.666 km/hr or 46.7 km/hr.

Hence the answer is = 46.666 km/hr or 46.7 km/hr.

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