which type of image is formed by convex lens on a screen?​

Answer:

satellite B

Explanation:

A .F= G (mM)/r²

B .F= G (2mM)/r² = 2G (Mm)r²

C .F= G (3mM)/(2r)² = ¾G (mM)/r²

D .F= G (4mM)/(2r)² = G (mM)/r²

Answer:

The speed of individual particle diffusion is influenced by temperature and particle size, not by concentration

Explanation:

The speed of the moving train is approximately 33.5 m/s.

The beat frequency is given by the difference in frequency between the two horns, which is equal to the Doppler shift in frequency due to the motion of the moving train. Using the formula for the Doppler effect, we can solve for the speed of the train:

\(f_b = f_s\dfrac{(v + v_o)}{(v + v_s)}\)

where \(f_b\) is the beat frequency, \(f_s\) is the horn frequency, v is the speed of sound, \(v_o\) is the observer's speed, and \(v_s\) is the speed of the source.

We know that \(f_s\) = 410 Hz and \(f_b\) = 35 Hz. The speed of sound in air at standard temperature and pressure is approximately 343 m/s. Since the observer is stationary, \(v_o\) = 0.

Solving for \(v_s\), we get:

\(v_s = \dfrac{(f_s + f_b)}{f_s - 1} \times v\)

\(v_s\) = ((410 Hz + 35 Hz) / 410 Hz - 1) * 343 m/s

\(v_s\) = 33.5 m/s

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The potential difference between the two ends of the circuit is the electric potential difference. The electric potential difference and the work will be 10V and 1.6 x 10^-18 J respectively.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The given data in the problem is given by;

E is the electric field = (200 N/C)

d is the distance = 5.0 cm.=0.05 m

Q is the charge of electrons= 1.602 x 10^-19 C

The formula for electric potential  is given by;

\(\rm V=Ed\)

\(\rm V=Ed \\\\ \rm V=200 \times 0.05 \\\\ \rm V= 10 \frac{Nm}{C} = 10 \frac{J}{C} = 10 V.\)

The work is defined as the product of the potential difference and charge of an electron.

\(\rm W= 10 \times 1.602 x 10^{-19} \\\\\ \rm W= 1.6 x 10^{-18 }J\)

Hence the electric potential difference and the work will be 10V and 1.6 x 10^-18 J respectively.

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first part is 10 second part is 1.6

Answer:

1.6L

Explanation:

Given parameters:

Initial volume  = 1.5L

Initial temperature  = 5°C  = 5 + 273  = 278K

Final temperature  = 30°C = 30 + 273  = 303K

Unknown:

Final or new volume  = ?

Solution;

Since pressure is constant, we simply apply Charles's law to solve this problem.

Using the expression below,

          \(\frac{V_{1} }{T_{1} }\)   = \(\frac{V_{2} }{T_{2} }\)

V and T are volume and temperature

1 and 2 are initial and final states

  Insert the parameters and solve;

         \(\frac{1.5}{278}\)   = \(\frac{V_{2} }{303}\)

          278V₂  = 1.5 x 303

                V₂  = 1.6L

If the two charged bodies are moved so that they are one-third as far apart, the force between them will increase to 4.905 N.

The force between two charged bodies is inversely proportional to the square of the distance between them. This means that if the distance between the two bodies is reduced to one-third of its initial value, the force between them will increase by a factor of (3)² = 9.

To calculate the new force, we can use the formula F = k(q₁q₂/r₁²), where F is the force between the two bodies, k is the Coulomb constant, q₁ and q₂ are the charges on the two bodies, and r is the distance between them.

Let F₁ be the initial force between the two bodies, and let r₁ be the initial distance between them. We can use the formula F₁ = k(q₁q₂/r₁²) to find the initial force.

F1 = k(q₁q₂/r₁²) = 0.545 N

Now, let r₂ be the new distance between the two bodies, which is one-third of r₁. The new force, F₂, can be calculated using the same formula.

F₂ = k(q₁q₂/r₂²) = k(q₁q₂/(r₁/3)²) = k(q₁q₂/(1/9*r₁²)) = 9k(q₁q₂/r₁²)

So, we have F₂ = 9F₁ = 9(0.545 N) = 4.905 N.

Therefore, if the two charged bodies are moved so that they are one-third as far apart, the force between them will increase to 4.905 N.

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Wo charged bodies exert a force of 0.545 n on each other. The new force exerted on each other when the bodies are moved one-third as far apart is 4.905 N.

The force between two charged bodies is given by Coulomb's law, which states that the force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

F = k * (|q1| * |q2|) / \(r^{2}\),

Where F is the force, k is the electrostatic constant (9 x \(10^{9}\) N m²/C²), |q1| and |q2| are the magnitudes of the charges on the bodies, and r is the distance between them.

Given that the initial force is 0.545 N, let's call the initial distance between the bodies as r1. We want to find the force when they are moved one-third of the initial distance, so the new distance is r2 = r1/3.

Using Coulomb's law, we have:

F1 = k * (|q1| * |q2|) / \(r1^{2}\)   (Equation 1)

F2 = k * (|q1| * |q2|) / \(r2^{2}\)   (Equation 2)

To find the force F2, we need to express it in terms of F1. We can rewrite Equation 2 as:

F2 = k * (|q1| * |q2|) / \((r1/3)^{2}\)

= 9 * (k * (|q1| * |q2|)) / \(r1^{2}\)

= 9 * F1.

Therefore, when the bodies are moved one-third as far apart, the new force exerted on each other is nine times the initial force.

Substituting the initial force value:

F2 = 9 * 0.545 N

= 4.905 N.

Thus, the new force exerted on each other when the bodies are moved one-third as far apart is 4.905 N.

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The minimum amplitude of the resultant pulse is 10 cm.

The amplitude of a pulse is the maximum height of the waveform measured from the baseline, also known as the peak-to-peak amplitude. In the case of two pulses, A and B, the minimum amplitude of the resultant pulse is determined by the vector sum of the individual amplitudes of the two pulses.

When two pulses are in phase, the resultant pulse amplitude is the sum of the individual amplitudes, which in this case is 20 cm + 10 cm = 30 cm.

However, if the two pulses are out of phase, the minimum amplitude of the resultant pulse is determined by the difference between the amplitudes of the two pulses. In this case, the minimum amplitude of the resultant pulse would be |20 cm - 10 cm| = 10 cm.

So, the minimum amplitude of the resultant pulse is 10 cm.

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According to the graph of displacement vs. time, the object's velocity is 0.02 m/s

The displacement is the shortest distance travelled by the particle. It is the vector quantity which re[presents both the magnitude and direction.

Velocity is the time rate of change of displacement with time.

Given is the displacement 0.2 m and time taken is 10s. So, the velocity is

v = 0.2/10

v = 0.02 m/s

Thus, the object's velocity is 0.02 m/s

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Condensation is the correct term for rising water vapor meeting colder air and turning back into water droplets.

Condensation is the exchange of the country of matter from the fuel section into the liquid section and is the opposite of vaporization. The word most often refers to the water cycle.

Condensation is the method thru which the bodily country of remembering adjustments from the gaseous phase into the liquid phase. for instance, condensation occurs whilst water vapor (gaseous shape) inside the air changes into liquid water whilst it comes in contact with a cooler surface.

If gaseous water vapor cools down sufficiently, it will flip lower back into a liquid - that's known as condensation. it's precisely the alternative to evaporation! while the clearly cold floor of an aluminum can comes into touch with the water vapor within the air, it cools some of them down enough to show them lower back into liquid.

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Question 1: Understanding of Induced EMF Induced electromotive force (EMF) is the voltage generated in a conductor or coil when there is a change in the magnetic field passing through it.

This change in magnetic field can be caused by various factors, such as relative motion between the conductor and the magnetic field, a change in the magnetic field strength, or a change in the orientation of the magnetic field.

According to Faraday's law of electromagnetic induction, the magnitude of the induced EMF is directly proportional to the rate of change of magnetic flux through the conductor or coil. The magnetic flux is the product of the magnetic field strength and the area through which the magnetic field lines pass.

The induced EMF can either be positive or negative, depending on the direction of the change in magnetic flux. The induced EMF creates an electric current that opposes the change in magnetic field, following Lenz's law.

Question 2: Calculation of Turns in Primary Coil

In a transformer, the ratio of turns in the primary coil to the turns in the secondary coil is equal to the ratio of the primary voltage to the secondary voltage. In this case, the primary voltage is 220 volts AC, and the secondary voltage is 5 volts AC.

Let's denote the number of turns in the primary coil as Np and the number of turns in the secondary coil as Ns.

The voltage ratio is given by:

Voltage ratio = Primary voltage / Secondary voltage

Voltage ratio = Np / Ns

220 V / 5 V = Np / 10

Simplifying the equation, we can cross multiply:

220 V * 10 = 5 V * Np

2200 = 5Np

Dividing both sides by 5, we find:

Np = 440

Therefore, the number of turns in the primary coil is 440.

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Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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The resulting changes will be:

1. Pressure head: 88 ft (or 26.82 m)

2. Effective stress: No change, assuming no other factors affect it

3. Fluid pressure: No change

4. Total stress: Decreased by the same amount as the effective stress

To calculate the effective stress in the aquifer, we need to subtract the fluid pressure from the total stress.

Given:

Pressure head in the aquifer = 100 ft (or 30.48 m)

The pressure head in the aquifer is directly proportional to the fluid pressure, which can be calculated using the formula:

Fluid pressure (P) = ρ * g * h

Where:

ρ = density of the fluid (water) = approximately 1000 kg/m³

g = acceleration due to gravity = 9.8 m/s²

h = pressure head

Fluid pressure = 1000 kg/m³ * 9.8 m/s² * 30.48 m ≈ 298,440 N/m² (or Pa)

The total stress in the aquifer is the sum of the fluid pressure and the effective stress. Therefore, the effective stress can be calculated by subtracting the fluid pressure from the total stress.

Now, let's consider the changes in the hydraulic head due to pumping:

Change in hydraulic head = -12 ft (or -3.66 m)

The resulting changes in each parameter will be as follows:

1. Pressure head:

The pressure head will be reduced by 12 ft, so the new pressure head will be 100 ft - 12 ft = 88 ft (or 26.82 m).

2. Fluid pressure:

The fluid pressure does not change, as it depends on the density of the fluid and the acceleration due to gravity, which remain constant.

3. Effective stress:

The effective stress can be calculated as the total stress minus the fluid pressure. Since the fluid pressure remains constant, the effective stress will also remain constant unless there are other factors affecting it.

4. Total stress:

The total stress is the sum of the fluid pressure and the effective stress. As mentioned earlier, the fluid pressure remains constant, so the total stress will decrease by the same amount as the effective stress, assuming no other factors affect the total stress.

Therefore, the resulting changes will be:

1. Pressure head: 88 ft (or 26.82 m)

2. Effective stress: No change, assuming no other factors affect it

3. Fluid pressure: No change

4. Total stress: Decreased by the same amount as the effective stress

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Answer:

Explanation:

it is a coal power plant , nuclear power is economical and does not fluctuate as much as wind or solar power.

Unlike coal, it is considered clean in terms of the amount of greenhouse gas emissions produced by the power plant itself, although uranium mining and processing are not without risks and environmental impact

a) The static friction force f, which is horizontal and parallel to the wall. It acts in the opposite direction to the force the person would experience if they were sliding downward.

b) The minimum coefficient of static friction required is:

μ = tanθ = 0.2

c)  No, the answer in part b) does not depend on the mass of the passenger.

a) The force diagram for a person on this ride, after the floor has dropped, includes the following forces:

The normal force N, which is perpendicular to the wall and the floor. It is equal in magnitude and opposite in direction to the force the person exerts on the wall due to their weight.

The gravitational force mg, which is downward and parallel to the wall.

The static friction force f, which is horizontal and parallel to the wall. It acts in the opposite direction to the force the person would experience if they were sliding downward.

b) To determine the minimum coefficient of static friction required for the person on the ride not to slide downward, we can use the following inequality:

f ≤ μN

where μ is the coefficient of static friction. The force f is equal in magnitude to the force the person would experience if they were sliding downward, which is mg sinθ, where θ is the angle between the wall and the vertical direction. The normal force N is equal in magnitude to the force the person exerts on the wall due to their weight, which is mg cosθ. Therefore, we can rewrite the inequality as:

mg sinθ ≤ μmg cosθ

Simplifying and canceling out the mass m, we get:

tanθ ≤ μ

Substituting the given values, we get:

tanθ = Δh / r = 0.5 / 2.5 = 0.2

Therefore, the minimum coefficient of static friction required is:

μ = tanθ = 0.2

c) No, the answer in part b) does not depend on the mass of the passenger. The mass cancels out in the inequality we used, so the minimum coefficient of static friction required depends only on the angle between the wall and the vertical direction.

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"The nflpa is the only players association to regulate ""runners"" and financial planners". The statement is false.

The NFLPA (National Football League Players Association) is not the only players association to regulate "runners" and financial planners.

The NFLPA is a labor union representing professional American football players in the National Football League. Its role is to protect the rights of players and promote their interests.

However, other professional sports players associations, such as the NBA Players Association and MLB Players Association, also have similar regulations for runners and financial planners.

These regulations are in place to ensure that players are protected from unscrupulous individuals who may try to take advantage of them financially.

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The power required to run the compressor is 18,506 W or approximately 18.5 kW, calculated using the rate of heat transfer through the insulation and the efficiency of the refrigerator.

To determine the power required to run the compressor, we need to consider the heat transfer that occurs through the insulation and the temperature difference between the interior of the refrigerator and the room.

First, we can calculate the rate of heat transfer through the insulation using the formula:

Q = kA (ΔT / d)

where Q is the rate of heat transfer, k is the thermal conductivity of the insulation material, A is the surface area of the refrigerator, ΔT is the temperature difference between the interior and exterior of the refrigerator, and d is the thickness of the insulation. Plugging in the given values, we get:

Q = (0.0119 J/m·s·°C) × (2.6 m²) × ((46.5°C - 8.5°C) / 0.045 m)

Q = 581.6 W

This represents the rate at which heat is flowing into the refrigerator from the warmer surroundings. To maintain the interior temperature at 8.5°C, the refrigerator must remove this heat at the same rate.

The ratio of the heat extracted from the interior to the work done by the motor is 3.8% of the theoretical maximum. The theoretical maximum is given by the Carnot efficiency, which is:

η = 1 - (T_cool / T_hot)

where T_cool is the temperature inside the refrigerator and T_hot is the temperature outside. Plugging in the given values, we get:

η = 1 - (8.5°C / 46.5°C) = 0.8172

So the actual efficiency of the refrigerator is:

ε = 0.038 × 0.8172 = 0.0314

This means that for every 1 W of power consumed by the motor, the refrigerator extracts 0.0314 W of heat from the interior. Therefore, the power required to run the compressor is:

P = Q / ε = 581.6 W / 0.0314 = 18,506 W

So the power required to run the compressor is 18,506 W or approximately 18.5 kW.

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The minimum size of a martian surface feature resolvable during the 2003 opposition by an earth-based telescope with an angular resolution of 0.05″ is 2.30 kilometers.

To calculate the minimum size of a Martian surface feature resolvable during the 2003 opposition using an Earth-based telescope with an angular resolution of 0.05″, we can use the formula for angular resolution:

θ = 1.22 * (λ / D),

where θ is the angular resolution, λ is the wavelength of light being observed, and D is the diameter of the telescope's aperture.

Given that the angular resolution is 0.05 arcseconds (″), we need to convert it to radians:

θ = 0.05 * (π / 180 / 3600) radians.

Assuming visible light with a wavelength of 550 nanometers (550 × 10⁻⁹ meters), we can substitute the values into the formula:

D = 1.22 * (λ / θ) = 1.22 * (550 × 10⁻⁹ meters) / (0.05 * (π / 180 / 3600) radians).

θ = 0.05 * (π / 180 / 3600) radians ≈ 2.91 × 10⁻⁷ radians

λ = 550 × 10⁻⁹ meters

D = 1.22 * (550 × 10⁻⁹ meters) / (2.91 × 10⁻⁷ radians)

D ≈ 2.30 × 10⁶ meters

Therefore, the minimum size of a Martian surface feature resolvable during the 2003 opposition by an Earth-based telescope with an angular resolution of 0.05″ is approximately 2.30 kilometers.

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Answer:

speed

Explanation:

Change in velocity, not velocity, is used to calculate the average acceleration. Velocity is displacement over time.

It is defined as the ratio of change in velocity to time. It is given by:

Acceleration= Change in velocity / time

a= u-v / t

where,

u= initial velocity

v= final velocity

t= time

Thus, we can conclude that a change in velocity is used to calculate average acceleration.

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Answer:

The correct option is;

C. The direction of the acceleration is the same direction as that of the net force, which is parallel to the ground

Explanation:

Newton's second law of motion states that the acceleration which a net force on an object  produces has a magnitude that is directly proportional to that of the magnitude of the net force, and the direction of the acceleration is the same as that of the net force that produces it.

Therefore, given that the net force which tends to push the lawn mower across the grass acts parallel to the ground, the direction of the is in the same direction of the net force, moving parallel the ground.

Answer: Musical theater is like acting in a musical.

Explanation: Other dance styles don't involve singing.

1.Life science involves fields of discipline catering to living organisms such as we humans while physical science caters to non-living organisms.

2.Life science has more fields of discipline than physical science.

3.Physical science relies on laws and theories to explain concepts while life science relies on biological explanations and can also rely on theories.

Physical science is concerned with the study of natural but non-living objects, while life science is the scientific study of living organisms. There is also a field called biophysics, which is where physics theories and methods are used to study biological systems.

A. The velocity of the rock after 9.4 seconds is 92.12 m/s.

B. The elevation of the rock after 9.4 seconds is 4396.72 m.

a) The velocity of the rocket at t = 20 sec is 2026 m/s to the right.

b) The velocity of the rocket at t = 80 sec is 1024 m/s to the right.

Given, Height, h = 370 meters Time, t = 9.4 seconds Acceleration, a = g = 9.8 m/s².

Formula Used:

The equations of motion for a freely falling body are,

v = u + gt (Initial velocity) u = 0m/s(initially at rest)

v² = u² + 2gh (final velocity)

h = ut + 1/2 gt².

We have to calculate the velocity and elevation of the rock after 9.4 seconds.

A) Calculation of Velocity Using the equation of motion v = u + gt where u = 0 (as the rock is dropped from rest)v = gt.

Now, putting the value of g and t, we get v = 9.8 m/s² × 9.4 s= 92.12 m/s. Therefore, the velocity of the rock after 9.4 seconds is 92.12 m/s.

B) Calculation of Elevation. Using the equation of motion

h = ut + 1/2 gt² where u = 0 (as the rock is dropped from rest)

h = 1/2 gt²

Putting the value of g and t, we get h = 1/2 × 9.8 m/s² × (9.4 s)²= 4396.72 m. Therefore, the elevation of the rock after 9.4 seconds is 4396.72 m.

Given,Initial velocity, u = 2360 m/s Deceleration, a = 16.7 m/s² Velocity at (a) t = 20 sec and

(b) t = 80 sec is to be calculated.Formula Used:

The velocity-time relationship is given by, v = u - at Where,v = final velocity u = initial velocity a = acceleration t = time elapsed.

We have to calculate the velocity at (a) t = 20 sec and (b) t = 80 sec.

a) Calculation of Velocity at t = 20 sec

Using the formula of velocity-time relationship,

v = u - at where u = 2360 m/sa = -16.7 m/s² (as the rocket is decelerating)v = ? (to be calculated)t = 20 s.

Putting the values,

we get,v = 2360 m/s - (16.7 m/s²) × 20 s= 2360 - 334= 2026 m/s.

Therefore, the velocity of the rocket at t = 20 sec is 2026 m/s to the right.

b) Calculation of Velocity at t = 80 sec.

Using the formula of velocity-time relationship,v = u - at where u = 2360 m/s a = -16.7 m/s² (as the rocket is decelerating)v = ? (to be calculated)t = 80 s.

Putting the values, we get,v = 2360 m/s - (16.7 m/s²) × 80 s= 2360 - 1336= 1024 m/s.

Therefore, the velocity of the rocket at t = 80 sec is 1024 m/s to the right.

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The equilibrium constant (Keeq) for a reaction at 25 °C can be calculated using the equation  Keeq = e^(−ΔG°/RT)

The equilibrium constant (Keeq) for a chemical reaction can be calculated using the equation Keeq = e^(−ΔG°/RT), where ΔG° represents the standard free-energy change, R is the gas constant, and T is the temperature in Kelvin.

In this case, the given standard free-energy change is −12.50 kJ mol−1 (−2.988 kcal mol−1). To calculate the equilibrium constant at 25 °C, we need to convert the temperature to Kelvin by adding 273.15 (25 °C + 273.15 = 298.15 K). Then, we substitute the values into the equation to find the equilibrium constant.

Keeq = e^(−12.50 kJ mol−1 / (8.314 J K−1 mol−1 × 298.15 K))

By evaluating the expression, we can determine the equilibrium constant (Keeq) for the given reaction at 25 °C.

The relationship between standard free-energy change and equilibrium constant in chemical reactions to understand the thermodynamic aspects of chemical equilibria

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Answer:

amp = 5 and wavelength = 6

Explanation:

The wavelength to set the colorimeter when measuring absorbances depends on the specific substance being measured. Each substance absorbs light at a specific wavelength, which is known as its absorbance maximum.

Therefore, the colorimeter should be set to the wavelength corresponding to the absorbance maximum of the substance being measured. This information can often be found in the experimental protocol or in the scientific literature.

If the absorbance maximum is not known, a wavelength scan can be performed to determine the wavelength of maximum absorbance, and this wavelength can be used for subsequent measurements.

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According to an energy bill, a client used 1027 kilowatt hours (kwh) in July. Did the customer consume the stated 1 joules = 3600 joules?

Physically, it is colorless, odorless, and a gas at ambient temperature with a weight of 1.260 g per liter under normal circumstances. It reacts with acetone and is chemically combustible, polymerizing to make polyethylene.

The following assertion about chemical and physical changes is true: C) Physiological changes always result in the creation of new substances. In nature, there are two different types of change: chemical development and physical change. No new chemicals are created, only the physicochemical characteristics of existing substances are temporarily altered.

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Answer:

P = M0 V / (1 - (V / C)^2)^1/2

Let V / C = X       unless V is a close to the speed of light (10% or so)

(1 - x^2)^1/2    is a small quantity and can be ignored at small speeds.

(1 - [1 - (V/C)^2]^-1/2 = (V/C)^2     using the first terms of the binomial expansion

P2 / P1 = V2 / V1 * (X2 / X1)^2

For V<<C     the effect is small and the momentum is merely doubled