20 points + Brainliest. Please help!


A piston is made of a gas-enclosed cylinder with a moveable top. For the system of the piston to be thermodynamic equilibrium, which set of condition must hold true?


A. Heat is added to the system, but never leaves it

B. Work is done by the system not on it.

C. Temperature and pressure are uniform throughout the system

D. Heat transfer and volume changes both occur very quickly

One end of the taut cable is pulled, causing a transverse pulse to be created. In 0.835 seconds, the pulse travels four times down the cable and four times back then the tension in the ethernet cable is determined as 67 N.

It is given to us that -

Ethernet cable is 3.90 m long => l = 3.90 m

and has a mass of 0.190 kg => m = 0.190 kg

It is also given that the transverse pulse makes four trips down and back along the cable in 0.835 s.

=> time taken, t = 0.835 s

We have to find out the tension in the cable.

We know that

Speed = Distance/Time ----- (1)

Since the transverse pulse applied on the ethernet cable makes four trips down and back along the cable, the total distance travelled by the pulse = 4 * (2l)

Now, using equation (1) we can find out the speed of the pulse by -

\(v = \frac{4*2*3.90}{0.835} \\= > v = 37.36\) m/s ---- (2)

We also know that the mass density of the pulse can be determined by the formula -

μ = \(\frac{m}{l}\) ------ (3)

where,

m = mass of the cable

l = length of the cable

Substituting the given values of mass and length of the cable in equation (3), we can find out the mass density of the pulse as -

μ = \(\frac{m}{l} = \frac{0.190}{3.90} = 0.048\) kg/m ------ (4)

We also know that the tension in the cable can be represented by the formula -

T = μ\(v^{2}\)  ----- (5)

Substituting the values of v and μ from equations (2) and (4) respectively, we can find out the tension in the cable as -

T = μ\(v^{2}\)

=> T = 0.048 * \((37.36)^{2}\)

=> T = 67 N

Thus, the tension in the ethernet cable is determined as 67 N.

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The arrow A represents the direction of upthrust.

Thrust is the pressure acting generally on a surface. Its SI unit is Newton (N). Thrust is the pressure that actions a plane via the air. Thrust is used to triumph over the drag of an airplane, and to conquer the load of a rocket.

As anxiety is the significance of pressure, it is measured in newtons (or now and again kilos-force) and is usually measured parallel to the string on which it applies. Thrust is a response pressure defined quantitatively by means of Newton's.

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Answer:

magnetic force:

i) It is exerted by a magnet.

ii)Magnetic forces are always normal to the direction of the velocity of the charge it acts upon.

Electrostatic force

i) It is exerted by electrically charged body.

ii)Electric force are independent of the direction the charge moves in.

✌✌✌✌

A binary system that is detected from the drop in luminosity as one star passes in front of the other is called an eclipsing binary.

An eclipsing binary is a type of binary star system consisting of two stars that orbit around their common center of mass. From the perspective of an observer on Earth, the two stars periodically eclipse each other as they move in front of one another during their orbits. This causes the combined brightness of the system to fluctuate, with the light curve showing a regular pattern of dips in brightness as the stars eclipse each other.

Eclipsing binaries are important astronomical objects because they allow us to measure the physical properties of stars more accurately than would be possible for a single star. By studying the properties of the eclipses, such as their duration and depth, astronomers can determine the sizes, masses, and temperatures of the stars in the system. This information can provide important insights into the evolution of stars and the structure of our galaxy.

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Answer:

B. is the closest answer.

Explanation:

"Asteroids are leftovers from the formation of our solar system about 4.6 billion years ago."

Answer B. is the closest answer to presenting a proper formation process of Asteroids.

Sorry if wrong....

B. They formed when the solar system formed in a method similar to planets, but they never grew large enough to become planets.

Asteroids:

Any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve around the sun in orbits lying mostly between those of Mars and Jupiter.

Answer: The hydration reaction of sulfuric acid is highly exothermic. If water is added to concentrated sulfuric acid, it can boil and spit dangerously. You should always add the acid to the water rather than the water to the acid for safety.

hope this helps!

Answer:

18 times

Explanation:

All sheaves used in the boom hoist reeving system must have a rope pitch diameter of not less than 18 times the nominal diameter of the rope used. The operating design factor for the boom hoist reeving system must be not less than five.

In order to form a hypothesis that would illustrate the relationship between mass and kinetic energy, we first need to understand what kinetic energy and mass are and how they are related. Kinetic energy is the energy that an object possesses due to its motion, and is given by the formula KE = 0.5mv², where m is the mass of the object and v is its velocity. Mass, on the other hand, is a measure of the amount of matter in an object.

The relationship between mass and kinetic energy is direct, meaning that as mass increases, so does kinetic energy, provided that velocity remains constant. Similarly, if velocity increases, then kinetic energy will increase as well, provided that mass remains constant.

The hypothesis that illustrates this relationship can be stated as follows:If the mass of an object is increased, then the kinetic energy of the object will also increase, because kinetic energy is directly proportional to mass, assuming velocity remains constant.In other words, if the mass of an object is doubled, then its kinetic energy will also double, assuming that its velocity remains constant. This hypothesis can be tested through experiments that involve measuring the kinetic energy of objects with different masses, but with the same velocity.

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If the mass of an object increases, then its kinetic energy will increase proportionally because mass and kinetic energy have a linear relationship when graphed.

Answer:

N = q / e    where q is the total charge on the ion and e = 1.6E-19 the charge on an electron or N = coulombs / (coulombs / electron)

Answer:

1st day = x

2nd day = x+6

3rd = x+6+6

4th = x+6+6+6

5th = x+6+6+6+6

5x+60 = 100

5x = 40

x = 8 (1st day)

Explanation:

He ate 8 peanuts on the first day.

Answer:

be classless

I think im not sure

Explanation:

Answer: C. (Force = 2, time = 4.5)

Explanation:

J = FΔt

A. J = 5*2

A. J = 10

B. J = 1*8.5

B. J = 8.5

C. J = 2*4.5

C. J = 9

D. J = 3*2

D. J = 6

Answer:

C. (Force = 2, time = 4.5)

Answer:

its z trust me

Explanation:

trust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeetrust meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

The magnetizing current of a transformer does not lie in-phase with the applied voltage. It lags the applied voltage by a small angle.

Magnetizing current

No, the magnetizing current of a transformer does not lie in-phase with the applied voltage. It is slightly lagging behind the applied voltage by a small angle. This is because the transformer core has a small amount of resistance, which causes a small voltage drop across the core. This voltage drop is in-phase with the current, and it causes the current to lag behind the voltage by a small angle.

When the transformer core is saturated, the magnetizing current increases sharply. This is because the core becomes increasingly difficult to magnetize as it approaches saturation. The increased magnetizing current causes the transformer to lose efficiency and to produce more heat.

Inrush current

The inrush current of a transformer can cause a number of problems, including:

Overloading the transformer

Tripping the transformer's protective devices

Damaging the transformer's windings

Starting a fire

Even at no-load, a transformer draws a small amount of current from the mains. This current is called the magnetizing current. The magnetizing current is required to create the magnetic field in the transformer core. The magnetic field is necessary to induce the voltage in the secondary winding.

Exciting resistance and exciting reactance

The exciting resistance of a transformer is the resistance of the transformer core. The exciting reactance of a transformer is the reactance of the transformer's windings. The exciting resistance and exciting reactance together form the transformer's impedance.

Transformers are not designed to operate in the saturated region. The saturated region is a region where the core is unable to produce any additional magnetic flux. This can cause a number of problems, including:

Increased magnetizing current

Decreased efficiency

Increased heat generation

Transformers are designed to operate in the linear region, where the core is able to produce a linear relationship between the applied voltage and the induced voltage. This allows the transformer to operate efficiently and to produce the desired amount of power

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Answer:

the nearest whole number is 5

Exerted force is called Pressure.

From,

Pressure = Force/Area

P = 500N/10m²

P = 50N/m²

The force exerted is 50N/m²

Answer each friend will get 3.33333 repeating if he is included. if only his friends are getting them then each one gets 4

Explanation:

devide 20/6 and 20/5 respectively.

Answer:

Yes ma’am I’m not doing it ok I’m sorry I didn’t mean to kitty you didn’t know that I was just trying to kitty kitty mama mama daddy mama mama I don’t wanna talk about it anymore I’m not gonna be mad I just got kicked out of the house I just woke me down and I’m sorry for the time you got snap I just got kicked out of the house I just woke me a text

Explanation:

The initial potential energy of the block is 36.75 J. The velocity of the block at the top of the incline is 7.0 m/s. The velocity of the block after it goes around the loop, on the flat section of the path is, 5.5 m/s The block will compress the spring by 0.75 meters before momentarily coming to a stop.

The initial potential energy of the block can be calculated as:

mgh = 1.5 kg * 9.8 m/s² * 2.5 m = 36.75 J

The velocity of the block at the top of the incline can be calculated using the conservation of energy principle,

mgh = (1/2)mv²

v = sqrt(2gh) = sqrt(2 * 9.8 m/s² * 2.5 m) = 7.0 m/s

The total energy of the block at the top of the loop is equal to the sum of its kinetic energy and potential energy at the bottom of the loop,

mgh + (1/2)mv² = mgh' + (1/2)mv'²

where h' is the height of the block above the bottom of the loop, and v' is the velocity of the block at the top of the loop. At the top of the loop, the velocity of the block is purely horizontal, so we can ignore the vertical component of the velocity. Therefore, we can write:

(1/2)mv² = (1/2)mv'²

v' = √(v² - 2gh') = √((7.0 m/s)² - 2 * 9.8 m/s² * 0.9 m) = 5.5 m/s

When the block collides with the spring, its kinetic energy is converted to potential energy stored in the spring, which can be expressed as,

(1/2)kx² = (1/2)mv'²

where k is the spring constant, x is the compression of the spring, and v' is the velocity of the block at the moment of collision. Rearranging this equation, we get:

x = √(mv'²/k) = sqrt(1.5 kg * (5.5 m/s)² / 90 N/m) = 0.75 m

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The term you are looking for is "chemical battery". Chemical batteries work by converting chemical energy into electrical energy through a series of chemical reactions. These reactions take place within the battery's cells, which are composed of two electrodes and an electrolyte.

When the battery is connected to a circuit, the chemical reactions produce an electrical current that can be used to power devices. Chemical batteries are widely used in many applications, including consumer electronics, electric vehicles, and renewable energy systems. They are a crucial component of our modern technological society, and ongoing research is focused on developing more efficient and sustainable battery technologies to meet growing energy demands.

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A gravitational acceleration points in the direction of the gravitational field's source object.

involving or relating to the pull of two masses: The planet's gravitational pull is responsible for the ebb and flow of ocean tides. Strong propensity or movement towards something or someone, whether inherent or implied: Many studies have been conducted to determine why they are drawn to destructive behavior.

Gravity only comes in one variety. In nature, there is only one form of gravity. According to their masses and the separation between their centers, there is only one kind of gravity influence that draws the two bodies together. Gravity is the strongest force known to exist in nature and is a form of central force.

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Answer:

Two lethal elements can combine to form an essential compound for health by undergoing a chemical reaction such that the properties of the individual elements are different from the properties of the product and are no more lethal

Example Mercury and Sulfur combine to form cinnabar which is used as a medicine to relieve pain, antiseptic, and to cure diseases

Mercury and sulfur combines because mercury readily combines with sulfur at high temperatures

Explanation:

Mercury is a lethal element that also has harmful effects on the neurological system

Sulfur is lethal when too much of it is consumed

A thermal energy transfer portfolio would be an excellent way for students to showcase their knowledge and understanding of this important scientific concept.

Thermal energy transfer is the energy transfer between two or more objects that have different temperatures. This energy transfer can take place in three different ways: conduction, convection, and radiation. A portfolio is a collection of documents or pieces of work that demonstrate a person's skills, abilities, and achievements in a particular area.

Therefore, a thermal energy transfer portfolio would be a collection of documents or pieces of work that demonstrate a person's skills, abilities, and achievements related to thermal energy transfer. This portfolio could include lab reports, experimental data, diagrams, and explanations of the various ways thermal energy can be transferred.

For example, a student's thermal energy transfer portfolio might include:

1. A lab report detailing an experiment they conducted to measure the rate of heat transfer through different materials using conduction.

2. A diagram showing the process of heat transfer through convection in a fluid, such as air or water.

3. A written explanation of the concept of radiation and how it relates to thermal energy transfer.

4. A spreadsheet of data showing the temperature changes in a system as heat is transferred through it.

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The level of demand placed on a CPU by media development software and games is typically considered to be high. Therefore, option D is correct.

Media development software, such as video editing programs or 3D modeling software, often requires significant processing power to handle complex tasks like rendering graphics, processing large files, and performing real-time calculations.

Similarly, games, especially modern and graphics-intensive ones, can put a heavy load on the CPU. Games require processing power to handle tasks like physics simulations, AI calculations, rendering high-resolution graphics, and running multiple threads simultaneously.

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Given that the time between when the marathon runner changes her velocity and the finish line is t, the acceleration of the runner approaching the finish line is 0.22/t m/s² .

The acceleration of a body is the change in the velocity of a body with time.

Acceleration is a vector quantity as it takes into account the change in velocity as well as the change in the direction of the body.

Hence, a body is accelerating if either or both of these two conditions apply:

Mathematically;

The change in velocity of a body = Final velocity - initial velocity

Change in velocity of the runner = 4.17 - 3.95

Change in velocity of the runner = 0.22 m/s

Time taken for this change = t

Hence;

acceleration = 0.22/t m/s²

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Answer:

Acceleration is (48-14)/40 m/s² = 34/40 m/s² = 0.85 m/s²

The acceleration acting on the train during this time of travel is 0.85m/s²

HOW TO CALCULATE ACCELERATION:

Where;

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Answer:

A. 10 joules

Explanation:

Given parameters:

Mass of object  = 4kg

Speed  = 5m/s

Unknown:

Kinetic energy of the the object  = ?

Solution:

Kinetic energy is the energy due to a moving body.

So;

           mathematically;

    K.E  = \(\frac{1}{2}\) x m v²

m is the mass

v is the velocity

  K.E  =  \(\frac{1}{2}\)  x 4 x 5  = 10J

The kinetic energy of the given moving object is 50 J. The  Kinetic energy of an object is the energy due to its motion.

The  Kinetic energy of an object is the energy due to its motion. It can be given as

\(KE = \dfrac 12 mv^2\)

Where,

\(m\) - mass = 4 kg

\(v\) - velocity =  5 m/sec.

Put the values in the formula,

\(KE = \dfrac 12 4 \times 5^2\\\\KE = 50 \rm \ J\)

Therefore, the kinetic energy of the given moving object is 50 J.

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