1. Let the plasma be an ideal gas of electrons (10pts) (a) Find the thermal force density Vp for an isothermal compression (b) find the thermal force density Vp for an adiabatic compression where na (

If I dropped object hits the ground after 1.8 seconds . The object will be  15.88 m high from the ground

using kinematic equation

s = u t + 1/2 a \(t^{2}\)

given

time = t = 1.8 seconds

a = g = acceleration due to gravity = 9.8 \(m/s^{2}\)

s = 0 - 1/2 * g *  \(t^{2}\)

  =  - 1/2 * 9.8 * \(1.8^{2}\)

  =  - 15.88 m

The object will be  15.88 m high from the ground

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Answer:

Larger, because both the Sun and Moon are pulling it.

Explanation:

Answer:

1.8 seconds

Explanation:

Ignoring air friction

d = 1/2 at^2

15    = 1/2 (9.81) t^2    shows  t = 1.75 = 1.8 seconds

Answer:

What happens to the wavelength of a wave if you double the frequency?

If the frequency of a wave is increased, what happens to its wavelength? As the frequency increases, the wavelength decreases. 2. If the frequency is doubled, the wavelength is only half as long.

Explanation:

Answer:

I hope it helped you...please mark as brainliest.....thanks!!!!!!!

Explanation:

Inches of mercury is ideal for vacuum lifting with vacuum cups, as the amount of vacuum required is rarely high. Typical vacuum handling utilizes anything between 15″Hg and 25″Hg. Therefore, “Hg is suitable as a measurement of system performance in this type of operation

The column of mercury employed in a mercury barometer, the height of which (inches of mercury) is used as a measure of atmospheric pressure.

At some point, all water vapour that is found in a vacuum system came from the atmosphere. Consider that air at 25° C and 50% relative humidity contains 12 torrs of water vapour. ... Additionally, any surface will adsorb a certain number of monolayers of water molecules.

Credits:

Vacuum Measurement: A Basic Guide - Fluid Power Journal

Sources of Water Vapor in Vacuum Systems | Normandale ...

Answer:

it would be coal

Explanation:

coal is the most used energy source in many countries as of China , India and, the United States

Coal is a primary energy source used by power plants to generate electricity

Electricity generation plants convert the chemical energy of fuel into electricity. Coal, oil, natural gas and nuclear fuels are the energy sources most commonly used for generating electricity.

"Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests."

"A fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons. "

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1 ) The value of the race constant acceleration = 28.14  m / s²

2 ) Time taken by the car to complete the distance = 5.33 s

s = ( u + v ) t / 2

s = Displacement

u = Initial velocity

v = Final velocity

t = Time

u = 0 m / s

v = 150 m / s

s = 400 m

400 = ( 0 + 150 ) t / 2

t = 800 / 150

t = 5.33 s

v = u + a t

a = Acceleration

150 = 0 + 5.33 a

a = 150 / 5.33

a = 28.14  m / s²

Therefore,

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When a wire is stretched so that its length is tripled, its cross-sectional area decreases by a factor of 3, since the volume of the wire remains the same.

The resistance of a wire is given by the equation:

R = ρ L / A

where R is the resistance, ρ is the resistivity of the wire (a constant that depends on the material), L is the length of the wire, and A is the cross-sectional area of the wire.

If the length of the wire is tripled while its volume remains constant, the cross-sectional area of the wire must decrease by a factor of 3. Therefore, the new cross-sectional area of the wire is 1/3 of its original value.

Let A' be the new cross-sectional area of the wire. Then :--

A' = A / 3

Substituting this expression for A' into the equation for resistance gives:--

R' = ρ (3L) / (A/3) = 9ρL / A

Therefore, the resistance of the stretched wire is 9 times the resistance of the original wire. In terms of the original resistance R, we have:--

R' = 9R

So the resistance of the stretched wire is 9 times the resistance of the original wire.

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The kinetic energy is high because, the mass of the object is large and thus has a great momentum and its velocity low because it has a large mass.

We know that kinetic energy of an object K = 1/2mv² where m = mass of the object and v = velocity of the object and its momentum, p = mv

For a given value of kinetic energy, the mass of the object m = 2K/v². This implies that m ∝ 1/v².

So, as the mass of the object increases, its velocity decreases.

So. an object with large mass has low velocity while an object with small mass has high velocity.

Also, the kinetic energy, K = 1/2mv². So, K ∝ mv². So, if m is large and v is small, the product mv² is large and thus K = 1/2mv² is high.

So, the kinetic energy of heavy vehicles is high because, the mass of the object is large and thus has a great momentum and its velocity low because it has a large mass.

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the answerrrrr isssssss A. gluteus maximus

Answer:

i heard my doctor say glutes, so i choose a

Explanation:

The focal length of the lens is approximately -34.1 cm. The lens is a diverging lens (concave lens).

The given values are,

Object distance (u) = -21.0 cm (negative because it is in front of the lens)

Image magnification (m) = -2.60 (negative because it's inverted)

magnification equation is

m = -v/u,

Rearranging this equation,

v = -m * u,

Substituting the given values,

v = (-2.60) * (-21.0) = 54.6 cm.

substituting the values of v and u into the lens formula,

1/f = 1/v - 1/u,

1/f = 1/54.6 - 1/(-21.0),

1/f = (21.0 - 54.6) / (54.6 * 21.0),

1/f = -33.6 / 1146.6,

1/f ≈ -0.0293,

so,

f ≈ -34.1 cm.

The focal length of the lens is approximately -34.1 cm. The negative sign indicates that the lens is a diverging lens (concave lens).

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Answer:

5.672/s^2 is his acceleration

Explanation:

1 minute is equal to 60 seconds. Take that and divide 340.3 by that.

Collected data plays a crucial role in evaluating whether the criteria for success have been met. By analyzing the collected data, one can assess the progress made towards achieving the desired goals and determine if the criteria have been fulfilled.

Data provides an objective measure of performance or outcomes, allowing for an evidence-based assessment of success. It helps to quantify and track key metrics or indicators related to the criteria for success. By comparing the actual data with the predetermined benchmarks or targets, one can determine if the criteria have been met or if further improvements are required.

Data analysis also enables the identification of trends, patterns, and correlations, providing insights into the factors influencing success. It helps in identifying areas of strength and areas that need improvement. Additionally, data can be used for comparative analysis, benchmarking against previous periods or similar projects, to gain a broader perspective on success.

In summary, collected data provides an objective basis for evaluating progress and success by comparing actual performance against predetermined criteria, identifying areas of improvement, and gaining insights for future decision-making.

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Answer:

22 cm ^3

Explanation:

P1 V1   = P2 V2         with constant mass and temperature

11 ( 5 x 10^5 ) =  x  ( 2.5 * 10^5)

x = 22 cm^3              ( when you 1/2 the pressure, you double the volume)

The amount of power is dissipated as heat inside the battery is 12 W.

Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

Power = P

Voltage = V = 12 V

Resistance = R = 7.54 Ω

Current = I = 0.999 A

Power = P =

= Power = Voltage X Current

= P = V X I

= P = 12 X 0.999

= P = 12 W

Thus, the power dissipated by the battery is 12 W approximately.

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Answer:

To see a shadow there most be light provided, even if it's night and there are lights, we can still see the shadow but if there is no light, we can't.

Hope it helped (:

Answer: yes of course, but there should be some light to make or see shadows.

Answer:

Aluminium

Explanation:

aluminum is the perfect heat shield material offering excellent protection against excessive exhaust system heat. Ultra-high-temperature ceramics,(UHTC), such as zirconium diboride (ZrB2) and hafnium diboride (HfB2) may be of choice.

Answer:

aluminium is the perfect head shield material offering excellent protection against excessive exhaust system heat

In a first order spectrum produced by a diffraction grating, the end nearest to the central maximum will be the end with the shortest wavelength.

This is because the diffraction grating separates the incoming light into its various wavelengths, with the shortest wavelength (highest frequency) being deflected the least and appearing nearest to the central maximum.

An optical element known as a diffraction grating is made up of several parallel slits or lines that have been etched onto a surface. As it interacts with the slits or lines in the grating, light that passes through it diffracts, or bends. Diffraction orders—a pattern of bright spots divided by dark spaces—are the outcome of this. The wavelength of the diffracted light and the angle of diffraction are both determined by the distance between the slits or lines. In spectroscopy, diffraction gratings are frequently used to divide light into its constituent wavelengths and to gauge the characteristics of various materials. They are also utilised in numerous other fields, including astronomy, laser optics, and telecommunications.

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The 10.0 kg mass moving at 30 m/s has the greatest momentum since momentum is calculated as the product of mass and velocity.

The mass and velocity of each object must be taken into account when calculating momentum, and the object with the highest momentum is the one with the highest product of mass and velocity.

Momentum = mass × velocity

The momentum of each object is calculated as follows:

1. 10.0 kg mass moving at 30 m/s.

Momentum = 10.0 kg × 30 m/s = 300 kg·m/s². 3000 kg mass moving at 0.2 m/s. Momentum = 3000 kg × 0.2 m/s = 600 kg·m/s³. 0.05 kg mass moving at 200 m/s. Momentum = 0.05 kg × 200 m/s = 10 kg·m/s⁴. 200 kg mass moving at 2 m/s. Momentum = 200 kg × 2 m/s = 400 kg·m/s.

Therefore, the 3000 kg mass moving at 0.2 m/s has the greatest momentum, with a value of 600 kg·m/s.

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During a tennis volley, the force pair involved is the action-reaction forces.

When playing tennis and returning a volley, the force pair involved is the action and reaction forces. In the process of hitting the ball, the tennis racket exerts a force on the ball, which is the action force.

The ball, in turn, exerts an equal and opposite force on the racket, which is the reaction force.Both the racket and the ball experience the force of impact during the volley.

The force applied by the racket causes the ball to move forward, while the equal and opposite force applied by the ball pushes the racket back.

These two forces are referred to as action-reaction forces or force pairs. A force pair refers to a pair of forces that are equal in magnitude but opposite in direction.

These forces always act on different objects and occur simultaneously. In this scenario, the action force was exerted by the tennis racket while the reaction force was exerted by the ball.

Therefore, during a tennis volley, the force pair involved is the action-reaction forces.

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The angle θ is approximately 0.688°, and the angle θ' is approximately 1.988°.

To determine the angles θ and θ' in the given scenario, we can use Snell's Law, which relates the angles of incidence and refraction to the refractive indices of the media involved. Snell's Law can be stated as follows:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

Where:

n₁ is the refractive index of the medium of incidence (in this case, air with a refractive index close to 1),

θ₁ is the angle of incidence,

n₂ is the refractive index of the medium of refraction (in this case, linseed oil with a refractive index of 1.48), and

θ₂ is the angle of refraction.

Let's solve for the unknown angles θ and θ' using the given information.

Given:

Angle of incidence θ = 1°

Refractive index of linseed oil n₂ = 1.48

We need to find the angle of refraction θ₂.

Using Snell's Law, we have:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

Since the refractive index of air (n₁) is approximately 1, we can simplify the equation to:

sin(θ₁) = n₂ * sin(θ₂)

Plugging in the values:

sin(1°) = 1.48 * sin(θ₂)

We can now solve for θ₂:

θ₂ = arcsin(sin(1°) / 1.48)

Calculating this value, we find:

θ₂ ≈ 0.688°

Now, let's determine the angle θ'.

Given:

Angle of refraction θ₂ = 0.688°

Refractive index of linseed oil n₂ = 1.48

We need to find the angle of incidence θ'.

Using Snell's Law, we have:

n₂ * sin(θ₂) = n₁ * sin(θ')

Since the refractive index of air (n₁) is approximately 1, we can simplify the equation to:

n₂ * sin(θ₂) = sin(θ')

Plugging in the values:

1.48 * sin(0.688°) = sin(θ')

Solving for θ', we find:

θ' = arcsin(1.48 * sin(0.688°))

Calculating this value, we get:

θ' ≈ 1.988°

Therefore, the angle θ is approximately 0.688°, and the angle θ' is approximately 1.988°.

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a) The capacitance of the container can be determined using the formula C = ε₀A/d, where ε₀ is the vacuum permittivity, A is the area of the plates, and d is the distance between the plates. In this case, the area A is given by the square of the side length, which is 40 cm. The distance d is initially 5 mm.

b) The electrostatic energy stored by the capacitor can be calculated using the formula U = (1/2)CV², where U is the energy, C is the capacitance, and V is the voltage across the capacitor. In this case, the voltage V can be calculated by dividing the charge Q by the capacitance C.

c) The electrostatic force acting on the metal walls can be determined using the formula F = (1/2)CV²/d, where F is the force, C is the capacitance, V is the voltage, and d is the distance between the plates. The force is exerted in the direction of the movable plate.

a) The capacitance of the container is a measure of its ability to store electric charge. It depends on the geometry of the container and the dielectric constant of the material between the plates. In this case, since the container consists of two parallel square plates, the capacitance can be calculated using the formula C = ε₀A/d.

b) The electrostatic energy stored by the capacitor is the energy associated with the electric field between the plates. It is given by the formula U = (1/2)CV², where C is the capacitance and V is the voltage across the capacitor. The energy stored increases as the capacitance and voltage increase.

c) The electrostatic force acting on the metal walls is exerted due to the presence of the electric field between the plates. It can be calculated using the formula F = (1/2)CV²/d, where C is the capacitance, V is the voltage, and d is the distance between the plates. The force is exerted in the direction of the movable plate and increases with increasing capacitance, voltage, and decreasing plate separation.

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Therefore, the object distance that creates a magnification of 5.05 in front of the concave mirror with a focal length of 89.5 cm is approximately 22.1 cm.

To determine the object distance that creates a magnification of 5.05 in front of a concave mirror with a focal length of 89.5 cm, we can use the mirror equation:

1/f = 1/di + 1/do

Where:

f = focal length of the mirror (given as -89.5 cm for a concave mirror)

di = image distance

do = object distance

Given:

f = -89.5 cm

magnification (m) = 5.05

Since the image is upright and magnified, the magnification (m) can be calculated using the following formula:

m = -di/do

Substituting the given magnification into the formula, we get:

5.05 = -di/do

Rearranging the equation, we can solve for di:

di = -5.05 * do

Now, substitute the values into the mirror equation:

1/-89.5 cm = 1/di + 1/do

Substitute di = -5.05 * do:

1/-89.5 cm = 1/(-5.05 * do) + 1/do

Simplify the equation:

-1/89.5 cm = (1 - 5.05) / do

-1/89.5 cm = -4.05 / do

Cross-multiplying:

-89.5 cm = -4.05 * do

Dividing both sides by -4.05:

do = -89.5 cm / -4.05

do ≈ 22.1 cm

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When a positive charge travels to the right near a wire carrying a current to the right, the force exerted by the charge on the wire, based on Newton's third law, will be directed downwards.

The direction of the force exerted by the charge on the wire is determined by the magnetic field produced by the current-carrying wire. Using the right-hand rule, the magnetic field will be in a circular pattern around the wire. In this case, the magnetic field at the location of the positive charge will be directed into the plane (or page).

The force on the positive charge, according to the Lorentz force equation (F = q(v x B)), will be upwards (perpendicular to both the velocity of the charge and the magnetic field). Therefore, the force exerted by the charge on the wire, based on Newton's third law, will be directed downwards.

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Answer:

The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds. Gravitational potential energy increases as weight and height increases. 

Answer:

A rock and a drilled nail

Explanation:

Both objects are not moving potential energy means no movement no energy and both objects never move

The coefficients of friction for this scenario are μs = 0.4 and μk = 0.2.

The coefficient of static friction (μs) is the ratio of the maximum force of static friction (Fs max) that can be overcome between two solid surfaces in contact with each other, while the coefficient of kinetic friction (μk) is the ratio of the force of kinetic friction between two solid surfaces in contact with each other that are in motion. Both coefficients can be used to describe the amount of friction between two surfaces, which is dependent on the type of material and surface finish. The equation F = μN is used to calculate frictional forces, where F is the force of friction, μ is the coefficient of friction, and N is the normal force, which is equal to the weight of the object in question.

The normal force N, which is equal to the weight of the object, is determined using the equation N = mg, where m is the mass of the object and g is the acceleration due to gravity. Using this information, the coefficients of friction can be calculated. In this case, the block weighs 200 N and requires 80 N of force to overcome the static friction to get it moving. The normal force is equal to the weight, which is 200 N, so the coefficient of static friction is:

μs = Fs max /N= 80 N/200 N= 0.4. For the kinetic coefficient of friction, 40 N of force is required to keep the block moving at a constant velocity. Since the block is already moving, the maximum force of static friction does not apply, so the force of kinetic friction is used. Thus, the coefficient of kinetic friction can be calculated as follows: μk = kinetic friction/N = 40 N/200 N = 0.2

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Answer:

im pretty sure B

Explanation:

Answer:

B

Explanation:

They both describe a rate of motion