An object is in equilibrium at 400 K. Calculate its change in Helmholtz free energy when heat is transferred from the object to lower its temperature to 282 K while the environment remains at 400 K. Assume that the heat capacity of the object is C=0.5 kJ K−1C=0.5 kJ K−1. Express your answer in kilojoules and round to 2 decimal places.

Answer:

D = 4 g/cm³

Explanation:

Density = Mass / Volume

Step 1: Define

D = x

M = 12 g

V = 3 cm³

Step 2: Substitute

D = 12g/3 cm³

Step 3: Simplify

D = 4g / cm³

If pressure has to be decreased the height of the piston needs to be increased which will increase volume of gas eventually decreasing the pressure.

The thrust (perpendicular force on a surface) acting per unit area of a body is referred to as pressure. It can be stated mathematically as follows: Pascal is the SI unit of pressure (Pa). One Pascal is the amount of pressure one Newton of force applies to a square inch of space. Additionally, 1 P a = 1 N / m 2. In the International System of Units, pressure or stress is measured in pascals (Pa) (SI). It bears Blaise Pascal's name, a mathematician and physicist. Applied force of one newton (N) per square metre is equal to one pascal (P) (m2).

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Answer As a wave travels across the open ocean, it gains speed. When a wave reaches a shallow coastline, the wave begins to slow down due to the friction caused by the approaching shallow bottom. ... Think of it like driving a car at high speed and then slamming on the breaks. Everything is going to fly to the front.:Waves at the Shoreline: As a wave approaches the shore it slows down from drag on the bottom when water depth is less than half the wavelength (L/2). The waves get closer together and taller. ... Eventually the bottom of the wave slows drastically and the wave topples over as a breaker. hope this helps have a nice night❤️❤️❤️

Explanation:

The minimum power requirement to produce 10 liters/s of fresh water from seawater using RO membranes is 28.3 kW. Option A is the correct answer.

The minimum power requirement to produce 10 liters/s of fresh water from seawater using RO membranes can be calculated using the formula given below:

P = d × g × h × V

Where P = Power in Watts,

d = Density in kg/m³,

g = Gravitational acceleration in m/s²,

h = Head in meters,

and V = Volume flow rate in m³/s.

It is given that the osmotic pressure is 28 atm = 28 × 101325 Pa = 2.83 × 10⁶ Pa.

The volume flow rate required is 10 L/s = 0.01 m³/s.

The density of seawater is approximately 1025 kg/m³.

The gravitational acceleration is 9.81 m/s².

Substituting the given values in the formula, we get:

P = 1025 kg/m³ × 9.81 m/s² × 2.83 × 10⁶ Pa × 0.01 m³/s= 28.3 kW

Therefore, the minimum power requirement to produce 10 liters/s of fresh water from seawater using RO membranes is 28.3 kW.

Option A is the correct answer.

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Answer:

yes is the correct snswer

Explanation:

hope this help

Answer:

When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.

Explanation:

hope it helps u

Answer:

C

Explanation:

The starting skill level of the physical activities included in a personal fitness program should be determined from other individuals' fitness programs is a statement which is not true. Everyone starts their personal fitness journey at a different level which should be regarded . A fitness test should be taken to determine where an individual should start their new lifestyle.

Answer:

C. I got it right :)

Explanation:

Answer:

1500 N

Explanation:

• Initial velocity, u = 12 m/s

• Final velocity, v = 20 m/s

• Time taken, t = 6.4 s

• Mass, m = 1200 kg

\(\longrightarrow\) F = ma

a = (v – u)/t, so

\(\longrightarrow\) F = 1200 × (20 – 12)/6.4

\(\longrightarrow\) F = 1200 × 8/6.4

\(\longrightarrow\) F = 1200 × 80/64

\(\longrightarrow\) F = 1200 × 40/32

\(\longrightarrow\) F = 1200 × 20/16

\(\longrightarrow\) F = 300 × 20/4

\(\longrightarrow\) F = 300 × 5

\(\longrightarrow\) F = 1500 N (Answer)

The magnitude of the resultant force on the box is calculated to be 207.002 N.

Here, we can apply the theory of triangle of forces to find the resultant force on the box.

Given that, two forces are acting perpendicular to each other as they are said to be in east and north directions.

Let us use Pythagoras theorem to find the magnitude of the resultant  force.

Let x be the magnitude of resultant force.

x² = 125² + 165²

x = √(125² + 165²) = √(15625 + 27225) = √(42850) = 207.002 N

Thus, the magnitude of resultant force on the box is 207.002 N.

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Answer:

1 atom of oxygen

2 atoms of hydrogen in each molecule

Each water molecule contains 3 atoms making the H2O formula

Answer:

close the door your letting the cold in

The correct answer is the Option D.

weight of volume of the water (or fluid) displaced by  the object.

What is buoyant force ?

The buoyant force is the upward force exerted on an item that is fully or partially submerged in a fluid. This upward thrust is also known as an upthrust. A body submerged partially or completely in a fluid will appear to lose weight or be lighter due to the buoyant force.

The weight of the volume of water or fluid displaced by the object and that upward buoyant force will be at the center of mass of the fluid or water that displaced.

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Answer:

The uniy which is accepted all over the world is called SI unit.

Explanation:

The system of measurement that is agreed by the international convention if scientists that is held in paris of France to adopt an international unit is called SI unit unit.

Each and every ounce of potential energy begins to transform into kinetic energy. Also, the height at the bottom is zero and is not present. Her ability to sense energy is thus at its optimum, and potential energy equals zero.

Kinetic energy is indeed the power a thing has as a result of motion. Applying a force is necessary in order to accelerate an object. We must exert effort in order to apply a force. Once the job is finished, energy is transferred to the item, which then moves at a new, constant speed.

An object or particle has kinetic energy because of its motion. When an item undergoes work—the transfer of energy—by being subjected to a net force, it accelerates and acquires kinetic energy.

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It took approximately 3.693 hours (or 3 hours and 41 minutes) for the bus to travel 325 km south with an average velocity of 88 km/h to the south.

To find the time taken by the bus, we can use the formula:

Time = Distance / Velocity

Given:

Distance traveled = 325 km (south)

Average velocity = 88 km/h (south)

Time = 325 km / 88 km/h

Time ≈ 3.693 hours

Bus travel typically refers to transportation by bus, where individuals or groups of people travel from one place to another using a bus as a means of transportation. Bus travel is a common and convenient mode of transportation for both short and long distances.

Here are some key points about bus travel:

Routes and Destinations: Buses operate on specific routes, connecting various cities, towns, and regions. They have designated stops along the way and serve specific destinations, allowing passengers to travel from one place to another efficiently.

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Magnetic objects are either drawn to or pushed away by magnetism. When two magnets with the same poles are positioned close to one another, they push apart and repel. When two dissimilar poles are positioned close to one another, they pull and attract to one another.

A soft iron core makes up an electromagnet. You may alter the magnetic field's strength. Simply cutting off the electricity will demagnetize an electromagnet. Reversing the polarity is possible.

A unique class of magnets called electromagnets has the following characteristics: By switching the direction of the current flow, the polarity of the magnets may be changed. They function as magnets when an electric current is passing through them; they are transient magnets that may be turned on and off.

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Ten devices that use batteries are: smartphones, laptops, flashlights, digital cameras, portable speakers, electric toothbrushes , remote controls, electric shavers, handheld game consoles, and electronic toys

What are the batteries?

Here are ten devices that use cells or batteries:

Whether or not the cells or batteries used in these devices are the best choice depends on various factors such as the device's power requirements, energy efficiency, cost, and environmental impact.

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Answer:

deuteron

Explanation:

Answer:

C. The Third Picture

Explanation:

EDGE 2021

The block, weighing 1.8 kg and on a frictionless 31-degree inclined plane, undergoes a 6.2 N horizontal force. The block travels approximately 5.92 meters up the slope in 2 seconds

The first step is to determine the components of the force acting on the block. The force applied horizontally can be resolved into two components: one parallel to the inclined plane (Fpar) and one perpendicular to the inclined plane (Fperp). The force parallel to the inclined plane can be calculated using Fpar = F * sin(theta), where F is the magnitude of the force and theta is the angle of the inclined plane.

Fpar = 6.2 N * sin(31 degrees)

Fpar ≈ 3.17 N

The force perpendicular to the inclined plane is given by Fperp = F * cos(theta).

Fperp = 6.2 N * cos(31 degrees)

Fperp ≈ 5.32 N

Since there is no friction, the only force acting on the block along the inclined plane is the component of the force parallel to the inclined plane. Therefore, this force will cause the block to accelerate down the inclined plane.

To find the magnitude of acceleration (a), we can use Newton's second law, which states that the net force acting on an object is equal to the product of its mass and acceleration.

Fpar = m * a

Rearranging the equation, we can solve for the acceleration:

a = Fpar / m

a = 3.17 N / 1.8 kg

a ≈ 1.76 m/s^2

Therefore, the modulus of the acceleration of the block is approximately 1.76 m/s^2, and its orientation is down the inclined plane.

Moving on to part B of the question, where the block is initially moving up the inclined plane at 1.2 m/s and we need to determine how far up the slope it travels in 2 seconds. We can use the equation of motion:

s = ut + (1/2)at^2

where s is the distance traveled, u is the initial velocity, t is the time, and a is the acceleration.

Plugging in the values:

s = (1.2 m/s) * 2 s + (1/2) * (1.76 m/s^2) * (2 s)^2

s ≈ 2.4 m + 3.52 m

s ≈ 5.92 m

Therefore, the block travels approximately 5.92 meters up the slope in 2 seconds.

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The superposition principle and the Copenhagen interpretation do not actually contradict each other. The superposition principle states that a quantum particle can exist in multiple states at the same time until it is observed.

The Copenhagen interpretation, on the other hand, states that the act of observation collapses the wave function of the particle, forcing it to exist in only one state.

The two concepts can coexist because the superposition principle is a mathematical description of how particles behave, while the Copenhagen interpretation is a philosophical interpretation of why particles behave the way they do.

The superposition principle simply states that the particle is in multiple states, but the Copenhagen interpretation explains why this is the case. In other words, the superposition principle is a description of the how and the Copenhagen interpretation is a description of the why.

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Tires aren't made from pure rubber because it makes the weight higher which increases the engine load.

This is defined as a piece of rubber which is attached to the wheels of automobiles for movement.

Pure rubber isn't used to make tyres because it has a higher weight which increases the engine load thereby making the vehicle slower.

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The total displacement, in meters, of the ball going through its entire motion: traveling from the ground to the top and then falling back to the ground is 0.

 An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a lecturer moves to the right in relation to a whiteboard. Displacement describes this shift in location.

The total displacement of an object is the distance and direction between its initial and final positions. If a ball is thrown upward, travels to the top and then falls back to the ground, its total displacement is zero.

This is because the ball travels upward and then downward, covering the same distance in opposite directions. The upward motion and the downward motion cancel each other out, resulting in a net displacement of zero.

So, the ball will be back to the ground where it was originally thrown.

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Answer:

I believe that it is the 1st one

Answer:

I don't know what you mean about which changes occurred in this process but if its why the dough starts rising then its caused by the carbon dioxide in baking soda and yeast which is a fungus

Answer:

When baking,flour is mixed with water,the other ingredients and yeast to form a paste called a dough.what happens is that the zymase enzyme from the yeast acts on the sugars to form carbon dioxide and alcohol.the carbon dioxide begins to form bubbles in the dough causing it to rise..

I hope this helps

The correct answer 27 mm^3 is the volume of the cube measureing 3 mm x 3 mm x 3 mm.

The cube's volume is 3 in x 3 in x 3 in = 27 mm ^3

The volume of a cube is calculated by multiplying its side by three. Thus, the volume of a cube can be expressed as Volume of cube = s ^3, where s is the cube's side length. A cube's volume is the space enclosed by its six faces. In contrast to 2d shapes, it has additional dimensions in addition to length and width, which are known as height and thickness. As a result, the volume of a cube equals the product of its length, width, and height.

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Answer: Medial rotation

Lateral rotation

Supination

Pronation

Opposition

Explanation:

Medial rotation can be defined as the rotation of any of the body part towards the middle axis of the body. For example, movement of leg bones so that the toes are pointed towards inward.

Lateral rotation is the movement of the body parts or bones away from the middle axis of the body. For example. outward circle created by the upper limbs directed outwards.

Supination is the rotation of the forearm in such a way so that the palm is directed upwards so that hand can receive money or hand can slap a person.

Pronation is the downward motion of hand to put things down.

Opposition is the movement of the bones of the fingers the metacarpals which allow the thumb to touch the fingertips.

Answer:

the fast carbon cycle follows the movement of carbon through living (biotic) components of an ecosystem. This occurs faster because life moves more quickly. The fast carbon cycle focuses primarily on the biosphere, while the slow carbon cycle is more involved with the hydrosphere, lithosphere and atmosphere.

Explanation: