when charge flows through a closed path and returns to its starting point, this is called a(n) _____________

Answer:

2.10L

Explanation:

Given data

V1= 2.5L

T1= 275K

P1= 2.1atm

P2= 2.7 atm

T2= 298K

V2= ???

Let us apply the gas equation

P1V1/T1= P2V2/T2

substitute into the expression we have

2.1*2.5/275= 2.7*V2/298

5.25/275= 2.7*V2/298

Cross multiply

275*2.7V2= 298*5.25

742.5V2= 1564.5

V2= 1564.5/742.5

V2= 2.10L

Hence the final volume is 2.10L

Answer:

\(\boxed {\tt 108.695652 \ cm^3}\)

Explanation:

Volume can be found by dividing the mass by the density.

\(v=\frac{m}{d}\)

The mass is 100 grams and density is 0.920 grams per cubic centimeters.

Therefore,

\(m=100 \ g \\d= 0.920 \ g/cm^3\)

Substitute the values into the formula.

\(v=\frac{100 \ g}{0.920 \ g/cm^3}\)

Divide. Note that the grams, or "g" will cancel each other out.

\(v- 108.695652 \ cm^3\)

The volume of the ice cube is 108.697652 cubic centimeters.

Answer:

Ask a question.

Explanation:

Your question is the basis of any theory.

Answer:

wavelength =75m

using v=fΠ

where Π is wavelength

Answer:

The observer hears a loud sound

Explanation:

In order to know if the observer hears a loud or a quiet sound, you need to know if there is a constructive or destructive interference between the sound waves of the loudspeakers.

You first calculate the distance between the observer and the loudspeakers.

The distances are given by:

d1: distance to loudspeaker A = 2.10m

d2: distance to loudspeaker B

\(d_2=\sqrt{(3.20m)^2+(2.10m)^2}=3.827m\)

Next, you calculate the wavelength of the sound waves by using the following formula:

\(\lambda=\frac{v_s}{f}\)

vs: speed of sound =  343 m/s

f: frequency of the waves = 400Hz

λ: wavelength

\(\lambda=\frac{343m/s}{400Hz}=0.8575m\)

Next, you calculate the path difference between the distance from the observer to the loudspeakers:

\(\Delta d=3.827m-2.10m=1.727m\)

You obtain a constructive interference (loud sound) if the quotient between the wavelength of the sound and the difference path is an integer:

\(\frac{\Delta d}{\lambda}=\frac{1.727m}{0.857}\approx2\)

Then, there will be a constructive interference, and the sound who the observer hears is loud.

Kinetics defines the forces that create motion or are generated from moving. this can include ground reaction force, friction, torque, or internal muscle forces.

A fundamental concept in physics is a force, defined as an action on an entity that causes a change in the motion of an object. It is one of the most important ideas in physics because of its many applications in everyday life. There are two types of forces: contact forces and non-contact forces. A contact force is a force that requires two things to come into direct physical contact. Friction, tension, and applied loads are examples of contact forces. In contrast, non-contact forces do not require direct physical contact between two things.

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Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

The  the capacitance of the cable is 18 nF, when the resulting potential difference between the two conductors is 420 V.

The capacitance of a cable is 125 nF when the resulting potential difference between the two conductors is 60 V. If the resulting potential difference between the two conductors is 420 V, what is the capacitance, in nanofarads, of the cable

Given:

Capacitance, C = 125 nF

Initial potential difference, V1 = 60 V

Final potential difference, V2 = 420 V

To find:

The capacitance of the cable is given by the formula:

Capacitance, C = (Charge, Q) / (Potential difference, V)

Or,

Charge, Q = C × V

We know that,

Charge, Q1 = C × V1

Charge, Q2 = C × V2

If we divide Q2 by Q1, then we get:

C × V2 / C × V1

= Q2 / Q1

Or,

C × V2 / C × V1 = (Final charge) / (Initial charge)

From the principle of conservation of charge, we know that:

Charge cannot be created or destroyed; it can only be transferred from one place to another.

Therefore, the initial charge and final charge are the same.

So, we can say that:

Charge, Q2 = Charge, Q1

Hence, C × V2 = C × V1

Or,

C = V1 / V2 × C1

Substituting the values, we get:

C = 60 V / 420 V × 125nF

= 18 nF (approximately)

Therefore, the capacitance of the cable is 18 nF, when the resulting potential difference between the two conductors is 420 V.

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The statement is true that sunlight falling on a spaceship in a vacuum will cause the spaceship to become a bit positively charged.

The photoelectric effect is the mechanism by which light may remove electrons from metallic surfaces, making them positively charged. The photoelectric effect might cause the surface of a metallic spaceship circling in sunlight to become positively charged.

Measuring the electron's energy is necessary for the photoelectric effect. Vacuum is necessary if you want to perform this with electrons. Under atmospheric conditions, electrons collide violently with gas molecules and atoms and quickly lose energy, which is completely unacceptable. Vacuum is therefore necessary.

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Clear question is;

An ideal gas is enclosed in a piston-cylinder apparatus with the piston being freely movable. Given that ΔE is positive and ΔH is negative following a process,

pick one

A) the system absorbs heat and expands during the process.

B) the system absorbs heat and contracts during the process.

C) the system loses heat and expands during the process.

D) the system loses heat and contracts during the process.

E) the system loses heat but neither expands nor contracts during the process.

Answer:

Option A is correct.

Explanation:

In thermodynamics, when the change in energy which is ΔE of a system is positive, it means that the system is undergoing an endothermic process. An endothermic process is simply one where heat is absorbed from the surroundings

Now, when change in enthalpy which is ΔH is negative, it means that it's an exothermic reaction. Exothermic means it releases heat to the surroundings. This means work is positive because the system does work on the surroundings. Thus it will expand.

So the correct answer is;

heat is absorbed from the surroundings and will expand during the process.

The switch has brushes within it so that the switch can be thrown from a to b without internal sparking. Now the switch is smoothly thrown from a to b, shorting the inductor and resistor. The time elapse before the current falls to 139 mA is 138ms.

When the switch is thrown from a to b, the switch has brushes within it so that the switch can be thrown from a to b without internal sparking. Shorting the inductor and resistor, the current falls to 139 mA after a specific period of time. The calculation to determine the time taken is given below:

Let us assume that the inductor is L, the resistor is R, and the initial current is I.

The voltage V applied to the circuit is V=IR.

Inductance can be given as V = Ldi/dt (1)

Differentiating this equation, we can obtain di/dt = V/L (2)

From Ohm's law, we have V = IR(3)

We can substitute the value of V from equation 3 into equation 1 and obtain Ldi/dt = IR(4)

When the switch is thrown, the inductor will attempt to maintain its current, causing a current i to flow through the shorted resistor with L/R time constant. As a result, the current decreases over time. We can use L/R as a time constant to determine the amount of time it will take for the current to reach 139 mA.

L/R = t(5)

Thus, t = L/R = 0.2 / 1.45 = 0.1379 seconds = 138ms

Therefore, the time elapsed before the current falls to 139mA is 138ms.

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A graphical representation of both amplitude and direction is called: Vector

A vector is a graphical representation of both amplitude and direction. In physics and mathematics, a vector is a quantity that has both magnitude and direction.

It is often represented by an arrow in a graph or diagram, where the length of the arrow represents the magnitude or amplitude, and the direction of the arrow indicates the direction of the vector.

Vectors are commonly used to represent physical quantities such as displacement, velocity, force, and acceleration.

By using vectors, it becomes possible to describe quantities that have both a numerical value and a specific direction in a concise and graphical way.

In addition to their graphical representation, vectors can also be expressed mathematically using coordinates or components. The components of a vector describe its magnitude in different directions, often along orthogonal axes.

Understanding vectors and their graphical representation is essential in various fields, including physics, engineering, and computer graphics, as they provide a powerful tool for analyzing and visualizing quantities with both magnitude and direction.

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The change in entropy of the universe is 5.26 J/K.

To find the change in entropy of the universe, we need to use the formula ΔS_univ = ΔS_hot + ΔS_cold, where ΔS_hot is the change in entropy of the hot reservoir and ΔS_cold is the change in entropy of the cold reservoir.

The change in entropy of the hot reservoir can be calculated using the formula ΔS_hot = Q_hot/T_hot, where Q_hot is the amount of heat transferred from the hot reservoir and T_hot is the temperature of the hot reservoir. Substituting the given values, we get:

ΔS_hot = 1050 J/576 K = 1.82 J/K

Similarly, the change in entropy of the cold reservoir can be calculated using the formula ΔS_cold = -Q_cold/T_cold, where Q_cold is the amount of heat absorbed by the cold reservoir and T_cold is the temperature of the cold reservoir. Since the heat is being transferred irreversibly from the hot reservoir to the cold reservoir, we know that Q_cold = -1050 J. Substituting the given values, we get:

ΔS_cold = -(-1050 J)/305 K = 3.44 J/K

Now we can calculate the change in entropy of the universe:

ΔS_univ = ΔS_hot + ΔS_cold
ΔS_univ = 1.82 J/K + 3.44 J/K
ΔS_univ = 5.26 J/K

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The net force is (40 Newtons) (down the road).

But 40 Newtons is not going to move a piano very enthusiastically.

The speed with which the rock was thrown is approximately 33.1 m/s.

The distance the rock falls is 75 meters (the height of the building). Using the equation of motion,

\(y = v_y\times t + \dfrac{1}{2}at^2\)

where y is the distance the rock falls, t is the time it takes to fall, and a is the acceleration due to gravity.

\(75 = v_y\times t - \dfrac{1}{2} 9.8t^2\\\\t = \sqrt{\dfrac{15}{v_y}}\)

Using the equation of motion,

\(x = v_x\times t\)

where x is the horizontal distance the rock travels, solve for v_x:

\(v_x = \dfrac{x}{t} \\= \dfrac{60}{\sqrt{\dfrac{15}{v_y}}}\)

Finally, use the Pythagorean theorem to find the initial velocity of the rock,

\(v = \sqrt{v_x^2 + v_y^2}\\\\v = \sqrt{\dfrac{60}{\sqrt{15/v_y}}^2 + v_y^2}\)

To solve for v_y, we'll need to use trial and error or an iterative numerical method. After some trial and error, we can find that the initial vertical velocity of the rock is approximately 29.4 m/s. Plugging this value into the equation for v,

v = 33.1 m/s

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The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Explanation:

FALSE

The first periodic table of elements Mendeleev created contained 63 elements.

The magnitude of the unknown distance is 4.838 m. The correct option is d

Average speed is the total distance travelled per total time. While average velocity is the total displacement per total time.

Given that an athletic mouse moves to the right for an unknown distance and then to the left for 2.06m. Between these two times the mouse has an average speed of 2.93 m/s and an average velocity of 1.18 m/s.

Let the unknown distance be d

Total distance s = d + 2.06

Speed = s/t

2.93 = ( d + 2.06 ) / t

Make t the subject of the formula

t = ( d + 2.06 ) / 2.93

Total displacement D = d - 2.06

Velocity v = D/t

1.18 = ( d - 2.06 ) / t

t = ( d - 2.06 ) / 1.18

Since t is the same,

( d - 2.06 ) / 1.18 = ( d + 2.06 ) / 2.93

Cross multiply

2.93( d - 2.06 ) = 1.18( d + 2.06 )

2.93d - 6.0358 = 1.18d + 2.4308

Collect the like terms

2.93d - 1.18d = 2.4308 + 6.0358

1.75d = 8.4667

d = 8.4667 / 1.75

d = 4.838 m

Therefore, the magnitude of the unknown distance that the mouse traveled to the right is 4.838 m. The correct option is d which is 4.838 m

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An object's temperature plays a crucial role in determining the wavelengths of radiation it emits, and this relationship is described by Planck's Law.

The wavelengths of radiation that an object emits depend primarily on the object's temperature. This is because temperature determines the amount of energy an object has, and the wavelength of radiation is directly related to the amount of energy it possesses.

As an object's temperature increases, its atoms and molecules become more energetic and vibrate faster, which causes them to emit radiation with shorter wavelengths and higher energy. This is known as the Planck's Law, which states that the wavelength of maximum radiation emitted by an object is inversely proportional to its temperature.

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Answer:

Explanation:

Easy!(assuming it's a horizontal spring)

Fs = kx

27N = k(4.4cm)

k = 118.8N/m

Us = k * x^2 / 2

Us = 118.8N/m * 0.035m^2 / 2

Us = 0.072Nm(J)

Answer:

\(4.5(10)^8\) joules

Explanation:

Mass–energy equivalence is the principle that says that anything that has mass has an equivalent amount of energy. Converse is also true.

The relation between energy and mass is given by \(E=mc^2\)

Here, E denotes energy, m denotes mass and c denotes speed of light

Mass \((m)=1.5\,\,kg\)

Speed of light (c) = 3 × \(10^8\) m/s

Therefore,

\(E=1.5(3)(10)^8=4.5(10)^8\)  joules.

The S.I. unit of energy is joules which is equal to \(1\,\,kg\,\,m^2/s^2\)

To Build your paper cup telephone system do the following:

Two cups, some inelastic string, thread, or fishing line, two paper clips, and a pencil or sewing needle are needed to make a paper cup phone.

Use a pencil or sewing needle to make a hole in the bottom of each cup, then thread a string through each hole to make a paper cup phone.

To keep the thread from coming away from the cups, secure each end with a paper clip. One person should speak into one cup, and you should listen through the other.

Pull the string taut. With the cups, you can talk to someone up to 100 feet away.

A string phone functions quite similarly to a landline. Talking into the cup causes the bottom to vibrate as sound waves are transmitted within the cup by your voice.

The other cup's bottom receives the vibrations that are transmitted to the string, across it, and into it. The second cup vibrates as a result of the sound waves transmitting your voice's audio.

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Answer: joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre.

Explanation:

This is a unit used to measure energy or work. One joule is the amount of energy required to produce one watt of power for one second. It's also the work done by a force equal to one newton exerted over a distance of one meter.

Hope this helps!

Explanation:

yes because snake is a living thing and snake breathes oxygen.

Newton's third law states that forces always occur in equal, opposite pairs.

The third law of motion by Newton states that equal but diametrically opposed forces always act in pairs. There is an equal but opposite reaction to every action, to put it another way. This means that when you push against a wall, the wall pushes back against you with an equal amount of force.

Action and reaction forces are described by Newton's third law of motion. According to the law, there is an equal and opposite reaction force for every action force.

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Five activities that will see the application of relation between pressure and area include:

When the handle of a pump is squeezed, the pressure inside the tire increases, causing the tire to inflate. By adjusting the size of the opening in the showerhead, the water pressure can be increased or decreased.

When a car is placed on a hydraulic lift, the pressure in the lift's cylinder is increased, causing the lift to raise the car off the ground. When a hydraulic jack is used to lift a heavy object, the pressure in the jack's cylinder is increased, causing the jack to lift the object.

A blood pressure cuff uses pressure to measure the blood pressure in a person's artery. The pressure in the cuff is increased until it is high enough to stop the flow of blood, and then the pressure is slowly released. The pressure readings at various points during this process can be used to determine a person's blood pressure.

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Because of  Newton's Third Law of Motion a rocket launched from Mars may travel even without pressing on the surface. The rocket's exhaust releases gas at high speeds, causing an action in one direction and an equal and opposite reaction in the other, propelling the rocket ahead. Unlike non-scientific or pseudoscientific explanations, this one is scientific and based on known scientific concepts.

Explanation based on a scientific theory: A rocket launched from Mars will work even if its exhaust does not push on the surface of Mars because of the scientific principle known as Newton's Third Law of Motion. The law states that for every action, there is an equal and opposite reaction. When a rocket is launched, it expels a large amount of gas at high speed, which creates an action in one direction.

This creates an opposite and equal reaction in the opposite direction, which propels the rocket forward. This is why rockets can move in the vacuum of space without the need for a surface to push against. It is scientific because it is based on an established scientific law and has been tested and confirmed through experiments and observations.

Non-scientific explanation of the same phenomenon: A rocket launched from Mars will work even if its exhaust does not push on the surface of Mars because it has a powerful engine that propels it forward. This explanation is non-scientific because it does not provide a clear understanding of the scientific principles involved in rocket propulsion and does not take into account the fact that rockets can move in the vacuum of space.

Pseudoscientific explanation of the same phenomenon:A rocket launched from Mars will work even if its exhaust does not push on the surface of Mars because it taps into the mysterious and powerful energy of the universe. This explanation is pseudoscientific because it is based on unproven and unfounded claims about the nature of the universe and does not take into account the scientific principles involved in rocket propulsion.

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