how are open and closed systems related to energy?

Answer :

\( Hence \ resistance \ increases \ with \\ increase \ in \ the \ temperature. \)

Answer: Equilibrium is the state in which market supply and demand balance each other, and as a result prices become stable. The balancing effect of supply and demand results in a state of equilibrium.

This is the answer please ap mujhe follow kar lo please

Answer:

c. The smallest part of helium

Water molecule \(\rm (H_2O)\) is not an example of an atom. Two hydrogen atoms (H) bond with one oxygen atom (O) to make the chemical. Therefore, the correct option is A.

The fundamental unit of matter is the atom, which is composed of an electron-orbiting nucleus containing protons and neutrons. It is the smallest, indivisible unit of an element and it still has all of its original chemical properties.

Options B and C, on the other hand, give a detailed description of specific chemical elements such as oxygen and helium, which are examples of atoms. The fundamental building block of an element is an atom, which is made up of an electron-bound nucleus (which consists of protons and neutrons).

Therefore, the correct option is A.

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Answer:

\(a=\frac{v^2}{r}\)

\(v=\sqrt{a*r}\)

\(r=\frac{v^2}{a}\)

Explanation:

This is the formula for centripetal acceleration in terms of the tangential velocity (v) and the radius of the circular motion (r).  The expression for the acceleration is already given, so simply type it as shown:

\(a=\frac{v^2}{r}\)

For the velocity (v) multiply by "r" both sides and then use the square root to solve for v:

\(a*r=v^2\\v=\sqrt{a*r}\)

For the radius multiply both sides by r and then divide both sides by the acceleration (a) in order to isolate r completely:

\(a*r=v^2\\r=\frac{v^2}{a}\)

Answer:

m = 70 kg

Explanation:

We have,

Weight of Simba on Earth is 687 N

It is required to find his mass.

The net force acting on him is the force of gravity or its weight. It is given by :

\(W=mg\\\\m=\dfrac{W}{g}\\\\m=\dfrac{687}{9.8}\\\\m=70\ kg\),  g = 9.8 m/s²

So, his mass is 70 kg.

According to given information, During Jean Piaget's formal operational stage of cognitive development, individuals develop systematic reasoning.

During Jean Piaget's formal operational stage of cognitive development, individuals develop systematic reasoning. This stage occurs between the ages of 11 to adulthood.

Systematic reasoning involves the ability to think abstractly, consider multiple variables, and draw logical conclusions based on evidence and principles. It allows individuals to solve complex problems, form hypotheses, and make predictions.

In this stage, individuals can engage in hypothetical-deductive reasoning, which involves forming and testing hypotheses to reach a conclusion. They can consider different possibilities and systematically evaluate them based on available evidence.

For example, let's say a teenager wants to investigate the effects of different types of music on plant growth. They may form a hypothesis that classical music promotes better growth compared to rock music. To test this hypothesis, they could design an experiment with controlled variables and systematically collect data on plant growth in different music conditions. By analyzing the data and comparing the results, they can reach a conclusion about their hypothesis.

In conclusion, during Jean Piaget's formal operational stage of cognitive development, individuals develop systematic reasoning. This allows them to think abstractly, consider multiple variables, form hypotheses, and draw logical conclusions based on evidence and principles.

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Answer:

When a negative charge is brought near one end of a conductor electrons are repelled. ... When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side.

The diameter of the smallest jovian planet is 3.96 times larger than the diameter of the largest terrestrial planet.

The jovian planets or also called giant gaseous planets are those that are far away in the solar system, which includes Jupiter, Saturn, Uranus, and Neptune, while terrestrial rocky planets include Mercury, Venus, the Earth planet and Mars.

Therefore, with this data, we can see that the jovian and terrestrial planets are different based on the composition of their surfaces and also due to the distance to the Sun.

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To find the average velocity on a velocity-time graph, you need to calculate the slope of the line connecting two points on the graph. The average velocity represents the change in velocity divided by the change in time between those two points.

To calculate the average velocity, you can use the formula:

Average velocity = (change in velocity) / (change in time)

You can determine the change in velocity by finding the difference between the final velocity and the initial velocity. The change in time is the difference in the time coordinates of the two points.

Select two points on the velocity-time graph, typically denoted by (t₁, v₁) and (t₂, v₂), where t represents time and v represents velocity. Then, substitute the values into the formula mentioned above to calculate the average velocity.

It's important to note that the average velocity provides information about the overall change in velocity over a specific time interval, rather than instantaneous velocity at a particular moment.

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Explanation:

CON EL TEOREMA DE PITÁGORAS

v = \(\sqrt{(12 km/h)^{2} + (25 km/h)^{2}}\) = 27.7 km/h

Answer:Heat can travel from one place to another in three ways: Conduction, Convection and Radiation.

Explanation:

Answer:

Ryan Upchurch

For many years I have learned a lot of things about him, Upchurch music, and his crazy aspects of life. And If there was A day then I got a list of things to do with him. First things first or me this is a hard question for a part of me would like to sit down with Ryan in a boardroom and discuss humanitarian ideas and share my opinions with them.

A part of me would like to go back in time and talk with the only person I wanted an autograph from, Katie Noal  I would discuss her concepts in her songs, ask if I could get some pointers, and finally ask her to sing one of her songs.

But then again Ryan does not like her so it would only be fair to spend the day with him., she is amazing and I love her humor. And he is sharp and quick as a whip. My time with him would leave me busting a gut laughing so hard. It would be on my bucket list of things to do.

Now at this time, I would eat some chicken some good fried chicken with some mash potatoes his wife would have made. You know he is just a funny person he has a comedian personality, it would be a joyous time to spend with him. Then we would take a drive and he can show me where he grew up and some crazy memories or life lessons on the way.  And explain some of his songs to me like my favorite ¨Vinyl¨.

I would ask Ryan where he took his plots from and what his aspects are of  life and who inspired him along the way. Or to just do nothing and have almost forgotten how to think; for picturing in his mind, and for writing his songs for all of us to enjoy. A proud man who wanted to become invisible but the accomplished task did not bring him happiness and instead brought him Fame.

I would be especially interested in asking him about “Everlasting country¨. Who was that person or what were the events, which prompted him to create an image of severe, almost help of countless operations in the country and America. However, Upchurch and I would go very soon they forget everything they were taught and… over and over again. If I could spend the day with him I hope that we could go mudding and just enjoy him.

I am always interested in the way that how he writes his songs and express how he feels about America. Now I would love to help him write a song and I would call It ¨Country time love¨. After all that we would sit and enjoy the campfire and eat some Smores :) Or I would ask him when and how he preferred to write, whether his stories were long in the making etc.

And finally, the last question that I would ask Ryan Upchurch is to compare his time with the other singers and analyze if any of his most gloomy predictions have come true about how he see life. Of course, Upchurch will hardly consider the agenda, and modern achievement such high standards for people. After that long day with him, I would think of him for everything we had done for the day. Maybe he would understand how I feel about the way I see life and how he has changed the way I look at life. That he would develop and these events would happen some time so he was able to make a song putting it as me and his song. Cause that would be very exciting! I hope that maybe this day will come and I will get to remember that day and hope that I will get to see him again like go to a concert or just hang out for the day.Therefore If I spent a day with Ryan I would Eat some chicken go mudding and sit by the fire and enjoy some good music.

Explanation:

Answer:

If I were given a chance to meet anybody who has ever lived and spend the whole day talking to that person, I would choose the French Queen Marie Antoinette. The reason for my choice is not her extraordinary talents or achievements; instead, I am interested in how an ordinary woman could have made it through the turmoil of the dark times for the French monarchy, a difficult marital relationship and never lose her sense of dignity.

I admire Marie Antoinette first of all for having endured the challenge of spending all or most of her time in public when she was still the wife of the French dauphine when she had to “on my rouge and wash my hands in front of the whole world” (Wikipedia, 2006). To a certain degree, each of us has to endure the challenge of being in public with one’s thoughts and feelings, and I would ask her how she was able to withstand this trial. I would also ask her how she managed to remain modest and nice to people surrounding her so that Jeanne Louise Henriette Campan in his memoirs remembered of her as “unwilling … to be reminded of her elevation” (Campan, 2004, p. 10).

I would want to see the person who, by will of chance, was lifted to the highest position a woman could command in Europe of those times, yet remained affable and pleasant to her subordinates and unwilling to impress herself on them and humiliate anybody at a time when it was all too common in the nobility.

If we had a chance to talk at length with Marie Antoinette, I would also ask her what she considers to be her mistakes at court and how she would have corrected them if given a chance. She surely had quite a few, but, after all, historian Simon Sebag Montefiore could have been right saying that Marie Antoinette was “a woman more sinned against than sinning” (Wikipedia, 2006). I am interested in learning what she thought of her life when it came to such a disastrous end as the execution in the French Revolution. Did she blame the crowd? Or was she reproaching herself for not having done more to protect her image in the eyes of the people? Marie Antoinette surely could not have averted the revolution that happened because of someone else’s sins, but she perhaps had a chance to appear less self-indulgent to the people.

This is one more thing I could address, as well as ask how she could demonstrate that outstanding courage when she stood on the balcony of the royal palace in Versailles at the point of many guns aimed at her, and how she could have been so strong at the time of the execution. I believe that her strength demonstrates what an ordinary woman can do in the face of danger and teaches us a lot about how one should never lose a human face when challenged in any way. A talk with Marie Antoinette could give me profound insights into the nature of people and reveal many interesting points.

Explanation:

Answer:

Gravitational.

Answer:

Velocity is quickness of motion or action. A synonym is celerity; a simpler word is speed. In physics, velocity specifically refers to the measurement of the rate and direction of change in position of an object.pls pls mark me branilest

Answer:

Velocity is defined as displacement travelled per unit time in a fixed direction. It is a vector quantity as it has both magnitude and fixed direction.

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Answer:

a) Pascal is a derived unit because it is derived from the unit of force and area

b)Mass is a fundamental quantity because it doesn't depends upon others physical quantity and made up of only one unit

c) unit of power is a derived unit because they are dependent quantities

D) unit of length is a fundamental unit because it cannot be expressed in terms of another quantity.

Answer:

The correct option is;

A. Circular

Explanation:

Some of the light that impinges on the surface are reflected and the rest are transmitted to a different medium

At the surface of the next medium also, some of the light are transmitted while the others are reflected and refracted through the first medium

The speed of light (and hence the wavelength and color) refracted through the thin film is changed as the distance the refracted light travels through the thin film is increased as we move away from the point directly in the front view to some distance as the reflected light path from those distance to the eye is increased due to their inclination giving them a different wavelength which are all equal at a radial distance from the eye hence forming a circular fringes.

Answer:

rick, also known by his fans as they benevolently call him as "Uncle Rick"

Explanation:

he is the one and only author of his trademark mythology

known best for his PJO, HBO and TOA series, uncle rick is one of the best things to ever happen to this planet

Answer:

the same number of electron shells

Explanation:

see this and you

try to understand

Kepler's third law of planetary motion helps you compare the velocities of different planets.

The orbits of planets around the Sun are described by Kepler's laws of planetary motion, which he published between 1609 and 1619.

The laws replaced the circular orbits and epicycles of Nicolaus Copernicus' heliocentric theory with elliptical trajectories and provided an explanation for the variation in planetary velocities. As per the three laws:

Hence, Kepler's third law of planetary motion helps you compare the velocities of different planets.

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The force responsible for the acceleration of the crate is the frictional force between the crate and the bed of the truck.

When the truck accelerates, the crate tends to remain at rest due to inertia. However, the frictional force between the crate and the bed of the truck acts in the forward direction, allowing the crate to accelerate along with the truck.

This frictional force is a result of the interaction between the surfaces of the crate and the truck bed. Without this frictional force, the crate would slide or move independently from the truck's acceleration.

The frictional force arises due to the microscopically rough surfaces of the crate and the truck bed. As the two surfaces are pressed against each other, intermolecular forces come into play, resulting in the generation of the frictional force

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The evidence supporting the impact of an asteroid at the Cretaceous-Paleogene (K-Pg) boundary, also known as the KT boundary, is indeed strong.

The evidence supporting the impact of an asteroid at the Cretaceous-Paleogene (K-Pg) boundary, also known as the KT boundary, is indeed strong. The most notable piece of evidence is the discovery of a large impact crater called the Chicxulub crater in the Yucatan Peninsula of Mexico, dating back to approximately 66 million years ago. This impact event is believed to have had significant global consequences, including widespread environmental changes.

The extinction of the dinosaurs and many other species at the KT boundary is widely attributed to the asteroid impact. However, the exact mechanisms and the extent of the impact's role in the extinction event are still subjects of ongoing scientific investigation. While the asteroid impact is considered a major factor, other hypotheses and additional research areas are being explored to gain a comprehensive understanding of the extinction event. Some of these hypotheses include:

It's important to note that while the asteroid impact is considered a leading cause of the extinction event, other factors may have also played a role. Scientists continue to study and analyze various lines of evidence to refine our understanding of this significant event in Earth's history.

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Answer:

Potential Energy = 147Joules

KE = 490Joules

Explanation:

1) Potential Energy = mgh

Mass m = 50kg

g = 9.8m/s^2

height h = 3.0m

Potential = 50*9.8*3

Potential Energy = 147Joules

2) KE = 1/mv^2

Get the velocity

v² = u²+2gh

v² = 0²+2(9.8)(1.0)

v² = 19.6

v = √19.6

v = 4.43m/s

KE = 1/2 * 50 *4.43²

KE = 25 * 19.6

KE = 490Joules

Hence the kinetic energy is 490Joules

(a) The potential energy of the can when it is  at the top of the ladder is 1470 J.

(b) The kinetic energy of the can when it is  1.0 meter above the floor is 488.41 J.

Given data:

The mass of the person is, m = 50 kg.

The weight carried by the person is, W = 20 N.

The vertical height of ladder is, h = 3.0 m.

(a)

The energy possessed by an object by virtue of its position is called potential energy. The expression for the potential energy is given as,

\(PE = mgh\)

here, g is the gravitational acceleration.

Solving as,

\(PE = 50 \times 9.8 \times 3.0\\\\PE = 1470 \;\rm J\)

Thus, the potential energy of the can when it is  at the top of the ladder is 1470 J.

(b)

And the kinetic energy is the energy of object by virtue of motion. And its expression is,

\(KE = \dfrac{1}{2} mv^{2}\)

Here, v is the velocity of can.

Now, at 1 m height, its velocity is calculated as,

\(v^{2}=u^{2}+2gh\\\\v^{2}=0^{2}+2 \times 9.8 \times 1.0\\\\v = \sqrt{2 \times 9.8 \times 1} \\\\v=4.42 \;\rm m/s\)

So, the kinetic energy is calculated as,

\(KE = \dfrac{1}{2} \times 50 \times (4.42)^{2}\\\\KE = 488.41 \;\rm J\)

Thus, we can conclude that the kinetic energy of the can when it is  1.0 meter above the floor is 488.41 J.

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Answer:

1 : 2 (30 : 60)

Explanation:

The rate of increase of the Earth's gravity field at latitudes 30° and 60° are in the ratio 1 : 2 because 30 : 60 simplified is 1 : 2.

If the answer does not ask for the ratio to be simplified leave its as 30 : 60.

The temperature would gradually increase after it is turned on. The rate of increase would depend on the power of the heater and the size of the room. Once the desired temperature is reached, the heater would automatically turn off to maintain the temperature.

If a propane heater is used instead of a furnace to heat a room that starts at 20 degrees Celsius, the temperature of the room would depend on various factors such as the size of the room, the insulation, and the power of the heater. Generally, a propane heater would provide heat more quickly than a furnace as it heats up faster. However, it also tends to heat up the immediate area around it more quickly, resulting in uneven heating in the room.

Assuming the propane heater is powerful enough to heat the entire room evenly, the temperature would gradually increase after it is turned on. The rate of increase would depend on the power of the heater and the size of the room. Once the desired temperature is reached, the heater would automatically turn off to maintain the temperature.

If the person who turned on the propane heater leaves the room, the temperature would continue to rise until it reaches the desired temperature. However, if the room is poorly insulated or there are drafts, the temperature may not reach the desired level or it may fluctuate. It is important to monitor the temperature regularly and adjust the heater as needed to maintain a comfortable and safe temperature.

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Answer:

Explanation:

1.B

2.C

3.C

4.B

(1)  While still water is immobile, currents have their momentum.  the correct option is (D). (2) He was among the first to investigate the mechanics of the moving body. The correct option is (C). (3) One is in motion, as both the ball and the racquet add momentum. The correct option is (C). (4) The statement is true. The correct option is (A).

(1)

According to Newton's first law of motion, an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity unless acted upon by an external force. Swimming in a pool (enclosed water) is very motionless, and the swimmer can move through it with little interference from outside forces. In the ocean or in water with a current, however, the water itself is moving, and the swimmer must spend greater effort to overcome the force of the current and make progress.

Hence, the correct option is (D).

(2)

Leonardo DaVinci's work is important for anyone interested in body mechanics since he was among the first to conduct substantial research on human anatomy and the mechanics of the body in action. His anatomical drawings and analyses of muscles and joints provided important insights into how the human body works.

Hence, the correct option is (C).

(3)

Newton's third law of motion states that for every action, there is an equal and opposite reaction. When the tennis ball strikes the racquet, it exerts a force on the racquet, which in turn produces an equal and opposite force on the ball. When the racquet moves, it imparts momentum to the ball, causing it to travel further.

Hence, the correct option is (C).

(4)

Good form becomes a habit when you learn to lift weights with optimal body mechanics. Proper body mechanics in weightlifting reduce the danger of injury while increasing the efficiency and effectiveness of the workout. Good form becomes established in your muscle memory with repeated practice, making it simpler to perform the movements correctly over time.

Hence, the correct option is (A).

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