what is the entropy change in an free expansion, a gas expands into a vacuum?

0.8 percent strain elongation does the rod undergo when it undergoes a temperature increase of 1000°c

As per given information;

Thermal expansion coefficient = \(8\times10^{-5}\)°\(C^{-1}\)

The original length of the rod = 10 cm

change in temperature =  1000°c

The change in length of the ceramic rod ΔL can be calculated using the formula:

ΔL = α * L * ΔT

where:

α = thermal expansion coefficient

L = original length of the rod

ΔT = change in temperature

By placing in the values given in the problem,

we get:

ΔL = (\(8\times10^{-5}\)°\(C^{-1}\)) * (10 cm) * (1000 °C)

ΔL = 0.08 cm

By using the formula we can calculate the percent strain elongation (ε) :

ε = (ΔL / L) * 100%

where:

ΔL denotes a change in the length of the rod

L denotes the original length of the rod

By plugging in the values, we get:

ε = (0.08 cm / 10 cm) * 100%

ε = 0.8%

Therefore, the ceramic rod undergoes a percent strain elongation of 0.8% when it undergoes a temperature increase of 1000°C.

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The location of the image formed by the converging mirror can be determined using ray tracing. The image will be located at a distance of 30 cm from the mirror. The image will be inverted and real.

To determine the location of the image, we consider two rays: the incident ray parallel to the principal axis that passes through the focal point after reflection, and the incident ray that passes through the focal point and becomes parallel to the principal axis after reflection.

These two rays are traced back to where they intersect, and that intersection point gives us the location of the image.

In this case, the lightbulb is located 60 cm from the mirror, and since the focal length is 20 cm, we can use the mirror equation: 1/f = 1/di + 1/do,

where f is the focal length, di is the image distance, and do is the object distance. By substituting the given values, we can solve for di to find that the image is located 30 cm from the mirror.

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Electrical energy which is provided to the pump is transformed into gravitational potential energy and into sound in equal portions. Thus, the correct option is C.

The principle of conservation of energy establishes that the energy cannot be created nor it can be lost alone. Energy can only be transformed, based on the principle of conservation of energy, the mechanical energy of the system is established as formed by the kinetic energy and the different in potential energies.

In this case, the electrical energy of the system is transformed into kinetic energy to raise the water temperature, when it reaches a height level where its actual speed is zero, all the mechanical energy is transformed into gravitational potential energy.

Therefore, the correct option is C.

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Your question is incomplete, most probably the complete question is:

Ahmad uses an electric pump to raise water to a reservoir on his farm. The pump is very noisy, and Ahmad’s uncle, who is an engineer, told him that only 50\%50%50, percent of the energy it consumes is delivered as gravitational potential energy to the water. When Ahmad turns off the pump, he notices that when he touches it, it has not warmed up.

What happened to the electrical energy provided to the pump?

a. It mostly transformed into gravitational potential energy, and a small portion transformed into sound.

b. It mostly transformed into sound, and a small portion transformed into gravitational potential energy.

c. It transformed into gravitational potential energy and into sound in equal portions.

d. It mostly transformed into sound energy and gravitational potential energy, and a small portion disappeared.

Answer: Attach it to clothing, personal flotation device or the person's person.

Explanation:

This particular Question or problem has to do with the rules and regulations or laws governing the use of Personal Watercraft(PWC) in the state of Florida in the United States of America. Hence, one of the rules that is applicable to the use of boats and waterways or the use of personal watercraft in Florida is that in florida, if ones pwc is equipped with an engine cut-off lanyard the person operating it must ATTACH IT TO THE CLOTHING, PERSONAL FLOATATION DEVICE IR THE OPERATORS' PERSON.

Another rule band the use of flammable personal flotation device with Personal Watercraft(PWC) in the state of Florida. All this rules and guildlines are made to limit or minimize hazards.

An ICE table can be used to calculate the pH of a solution. The ICE table is an acronym for Initial, Change, and Equilibrium concentrations is 1.2× 10⁻³.

An acronym is a word or name formed as an abbreviation from the initial components of a phrase or a word. It is pronounced as a word, rather than letter by letter. Acronyms are often created using the first letter of each word in a phrase to form a new word. Examples of acronyms include NASA (National Aeronautics and Space Administration), OPEC (Organization of Petroleum Exporting Countries), and ASAP (as soon as possible). The use of acronyms is common in both speech and writing and can be used to shorten the length of long phrases or words.

Acetic Acid (HA): 0.100 - x,Sodium Acetate (NaA): 0.100 + x,The equilibrium equation for this reaction is:HA + NaA ⇌ H2A + Na+,The equilibrium constant (K) is: K = [H2A][Na⁺] / [HA][NaA],Substituting the equilibrium concentrations into the equation, we get:

K = (x)(x) / [(0.100 - x)(0.100 + x)],Rearranging, we get:x2 = (1.8 × 10⁻⁵)(0.1002),Solving for x, we get:x = 1.2× 10⁻³

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Answer:

They remain the same

Explanation:

As the molecule goes from reactants to products, the number of atoms in the each of the element remains the same.

This is in compliance with law of conservation of matter. The law proposes that "in a chemical reaction, matter is neither created nor destroyed by changed from one form to another".

So, since no matter is destroyed, the number of atoms during a chemical change remains the same before and after a reaction.

This is applicable to all chemical changes.

The space station's, which has a ringed compartment is rotating with initial velocity 0.10rad/s and angular acceleration of 0.01rad/s², angular velocity after 960 seconds is 9.7 rad/s.

To find the space station's angular velocity after 960 seconds, we can use the following equation that relates initial angular velocity, angular acceleration, and time:

Final angular velocity (ωf) = Initial angular velocity (ωi) + (angular acceleration × time)

Given:
Initial angular velocity (ωi) = 0.10 rad/s
Angular acceleration = 0.01 rad/s²
Time = 960 seconds

Now, we can plug these values into the equation:

ωf = 0.10 rad/s + (0.01 rad/s² × 960 s)

ωf = 0.10 rad/s + (9.6 rad/s)

ωf = 9.7 rad/s

So, the space station's angular velocity after 960 seconds is 9.7 rad/s.

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The speed with which the train reaches the rock slide is 19.36 m/s

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

The initial velocity of the train can be obtained as illustrated below:

–1.6 = (0 – u) / 12.1

Cross multiply

0 – u = –1.6 × 12.1

– u = –19.36

Divide both sides by –1

u = –19.36 / –1

u = 19.36 m/s

Thus, the train uses 19.36 m/s to reach the rock slide

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To determine the degrees Plato (°P) of a beer based on its specific gravity, you can use the following formula:

°P = (SG - 1) * 1000

Where °P is the degrees Plato and SG is the specific gravity.

In this case, if the beer has a specific gravity of 1.04, we can calculate the degrees Plato as follows:

°P = (1.04 - 1) * 1000

°P = 0.04 * 1000

°P = 40

Therefore, a beer with a specific gravity of 1.04 corresponds to 40 degrees Plato. The degrees Plato is a measure of the concentration of fermentable sugars in a solution and is commonly used in the brewing industry to estimate the potential alcohol content of the beer.

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Answer:

Essential processes happen in a cell: Onion plant and Diatom

A cell is its basic unit of structure: Onion plant and Diatom

Made up of one cell: Diatom

Made up of many cells: Onion plant

Answer:

i think b

Explanation:because they are so close

Answer:

look it up

Explanation:

Answer:(x-32) * 5/9

Explanation:

(52°F − 32) × 5/9 = 11.1111°C

The value of m in terms of the known masses is √\(M_1M_2\) .

Two cases are mentioned in the figure,

first case,

Two mass m and \(M_1\)

m is \(l_1\) the distance from the center and \(M_1\) is \(l_2\) the distance from the center.

second case,

Two mass m and \(M_2\)

m is \(l_2\) the distance from the center and \(M_2\) is \(l_1\) the distance from the center.

The balance in the  1st case requires \(ml_1\) = \(M_1l_2\)

And the balance in the second case,

\(M_2l_1\) = \(ml_2\)

Cancel \(l_1\) and \(l_2\) from the above equations,

So, m² = \(M_1M_2\)

m = √\(M_1M_2\)

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The question is -

A rod of negligible mass is pivoted at an off-center point, so that length? 1 is different from length? 2. The figures show two cases in which masses are suspended from the ends of the rod. In each case, the unknown mass m is balanced by a known mass M1 or M2 so that the rod remains horizontal. TTL Mi e1 Tn

What is the value of m in terms of the known masses?

1. m = p M1 M2

2. m = M1 M2

3. m = M1 + M2 2

4. m = M1 M2 2

5. m = M1 + M2

The maximum height reached by the ball is 1042.9 m and the range of the ball is 543.98 m.

The given problem can be solved using projectile motion. Projectile motion is a form of motion that occurs when an object is thrown near the surface of the earth and moves along a curved path due to the influence of gravity. Here, a ball is thrown into the air at an angle of 70 degrees above the horizontal with an initial velocity of 60 m/s from a 50 m high building. We need to find the maximum height reached by the ball and the range of the ball.

Let's first find the time taken to reach the maximum height. We know that,Initial vertical velocity

u = usinθ

= 60sin70°

= 57.66 m/s

Acceleration due to gravity g = 9.8 m/s²

Maximum height h is given by the formula,

h = u²sin²θ/2g

= 57.66²sin²70°/2×9.8

= 1042.9 m

Now, we can find the time taken to reach the maximum height using the formula

v = u + gt0

= v - u/g

= 0 - 57.66/9.8

= 5.87 s

So, the time taken to reach the maximum height is 5.87 s.

Using the formula, Range

R = u²sin2θ/g

= 60²sin2(70°)/9.8

= 543.98 m

Therefore, the maximum height reached by the ball is 1042.9 m and the range of the ball is 543.98 m.

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For the transistor model in the following figure, obtain the Thevenin equivalent is \(V_{th}\)=-700V and \(R_{th}=5\)kohm.

To find the Thevenin equivalent ,

By temporarily removing the load resistance from the original circuit and reducing what is left to an analogous circuit made up of a single voltage source and series resistance, Thevenin's theorem can simplify this analysis.

After reconnecting the load resistance to the Thevenin equivalent circuit, calculations can be performed as if the entire network were just a straightforward series circuit.

Now, the voltage given is 21V

\(R_{1}=3\) kohm

\(R_{2}=5\) kohm

as, V=ir

So, I=\(\frac{21}{R_{1} }\)

I=\(\frac{21}{3}\)

I=7mA

\(V_{th}\)=-20I×\(R_{2}\)

\(V_{th}\)=-20×7×5

\(V_{th}\)=-700V

and to find the value of \(R_{th}\)

i=0A

20i=0 means it is short circuit.

\(R_{th}=R_{2}=5\) kohm

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Answer:

Oxygen in a container can be made to be at a high pressure through a process called compression. In this process, the oxygen is forced into a smaller volume, which increases the pressure. This can be done using a compressor, which is a machine that uses a piston or other device to compress the oxygen. The compressed oxygen is then stored in a container, such as a cylinder, at high pressure until it is ready to be used. It is important to handle compressed oxygen with care, as it can be dangerous if not handled properly.

Answer:

False

Explanation:

The formula of force that exists between two charges is expressed as;

F = kq1q2/r²

If two charges separated by one meter exert a 9 N force on each other, the;

9 = kq1q2/1²

9 = kq1q2 ..... 1

If the charges are pushed to a 3 meter separation, then;

F =  kq1q2/3²

F =  kq1q2/9 .... 2

Divide both equations;

9/F = (kq1q2)/ kq1q2/9

9/F =  kq1q2 * 9/ kq1q2

9/F = 9

F = 9/9

F = 1N

Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False

2)

Explanation

Step 1

Ohm's law states that the strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.

so

a)

b)

Step 2

2

let

Power is equal to voltage multiplied by current.

so

also, replacing

also

I hope this helps you

Answer:

The North Pole.

Explanation:

According to the Lenz's law of electromagnetic induction, an induced elemagnetic force tends to give rise to the current. In reaction, this current's magnetic field try to oppose any replacement in the magnetic flux.

So,  as per the law of Lenz's electromagnetic induction, when the current passes in a coil in anti-clockwise direction, this will produce the opposite end of the coil in the north pole.

So, the correct answer is north pole.

Answer:

330 Hz

Explanation:

edg2020

The best estimate of the frequency Suzy hears after the car passes her is govern by doppler effect and it is 330 Hz.

Frequency is the number of occurrences of a repeating event per unit of time.

The Doppler effect is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.

According to the Doppler Effect, the frequency observed by an observer decreases for source going away.

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Answer:

11 N

Explanation:

You will need enough force to overcome the static friction

Fn = 2.50 kg * 9.81 m/s^2

F of static friction =  Fn * coeff static =  2.50 * 9.81 * .448 =~ 11 N

The action of muscles on acting depend upon biceps brachii and brachioradialis contacts to forearm flex the elbow are Antagonist Agonist The triceps brachii is stretched as you flex your forearm on the elbow.

The brachialis muscle is a top flexor of the forearm on the elbow joint. It is fusiform in form and positioned withinside the anterior (flexor) compartment of the arm, deep to the biceps brachii. The brachialis is a extensive muscle, with its broadest element positioned withinside the center in preference to at both of its extremities.

Biceps works with different muscle groups in its roles being: One of 3 muscle groups that flex the elbow and it does this paintings together with the brachialis and brachioradialis. The triceps brachii contracts to increase the forearm Synergist The biceps brachii and brachioradialis settlement to flex your forearm on the elbow.

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When Earth is closer to the sun, there will be hotter climate. A little movement that takes one closer to the sun could lead to a huge impact.

If I put a planet in orbits 2, 6, and 75, all planets will orbit the sun successfully if the sun's mass is 1x, and at least one planet will fall inside the habitable zone.

If I put a planet in orbits 84, 1, and 5, at least one of them will fall into the habitable zone if the sun's mass is 2x, and all planets will orbit the sun successfully.

If I put a planet in orbits 672 and 7, at least one of them will fall into the habitable zone if the sun's mass is 3x, and all planets will orbit the sun successfully.

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Answer:

It would take 5

18.3

Explanation:

It depends on how fast it comes and the timing

Answer:

The dark lines in absorption spectrum of light is due capacity of atoms to absorb light of a specific energy. The absorption of light by atoms occurs when the atom transitions from a lower energy or ground state to an excited high energy state, and it appears in the emission spectrum of the element as dark lines located in the same position as the bright lines

Explanation:

Answer:

2m head start or else you done for

Explanation:

you cant even out run a bear they run at 35mph the fastest human is 25