the highest frequency ultrasound devices have frequencies around 20 mhz. what is the wavelength of these sound waves inside the body?

The subatomic particles in the nucleus of an atom of argon depend on the nucleus and proton.

What subatomic particles?

A particle that is smaller than an atom is what is known as a subatomic particle. Protons, electrons, and neutrons are the three subatomic particles that make up an atom in most cases.

40Ar

18 protons, 22 neutrons, 18 electrons

There are 18 protons from the argon element. These 18 electrons because it is neutral, and 22 neutrons because 40 - 18 = 22.

Hence the total number of subatomic particles present in the nucleus is 22.

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The average velocity for this trip is calculated by taking the total displacement (the difference between the final and initial positions) and dividing it by the total time.

In this case, the total displacement is 25 meters (50 meters west minus 25 meters east) and the total time is 100 seconds (60 seconds plus 40 seconds). Therefore, the average velocity for this trip is 0.25 meters per second.

Average velocity is a measure of the rate of change in an object's displacement over a period of time. It is calculated by dividing the change in an object's displacement by the time it took for the change to occur. Average velocity can be used to measure the speed of an object in a particular direction.

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Answer: .250m/s

Explanation:

The resultant force on the ball is 50 N.

Reusltant force can be defined as the sum of the force acting on a object.

Note: From the question, the forces from both kicks are at right angle to each other.

And to calculate the resultant force on the ball, we use the formula below.

Formula:

From the question,

Given:

Substitute these values into equation 1

Hence, the resultant force on the ball is 50 N.

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Based on Newton's law of gravity, the force of attraction on the airplane moving on Earth is directly proportional to the mass of the airplane and inversely proportional to the square of distance the airplane from Earth's surface.

Newton's law of universal gravitation states that the force of attraction between two objects in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between the two objects.

Mathematically, this law is written as follows;

Fg = ( G m₁ m₂ )  / ( r² )

where;

From Newton's second law of law of motion we will have;

F = mg

mg = ( G m₁ m₂ )  / ( r² )

g = Gm / r²

Every object on  Earth surface moves with equal acceleration due to gravity which has a value of 9.8 m/s².

Thus, airplane flying on Earth surface will be affected by gravity and the weight or downward force on the airplane is a function of gravity.

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Answer:

So let's first start with the base which is a rectangle remember that the formula to solve the area

Explanation:

Based on the provided options, the article is mainly about D. Lindsey Vonn competing in four Olympic Games. The correct option is D.

A. The teen athletes who went to the Youth Olympic Games: This option is not true because there is no mention of teen athletes or the Youth Olympic Games in the given information. The article focuses on Lindsey Vonn and her participation in the Olympic Games, not specifically on the Youth Olympic Games or other teen athletes.

B. Lindsey Vonn speaking at the Youth Olympic Games: This option is not true because there is no mention of Lindsey Vonn speaking at the Youth Olympic Games in the provided information. The article is about her competing in the Olympic Games, not speaking at the Youth Olympic Games.

C. The ideas that are important in the Olympic Games: This option is not true because there is no indication that the article discusses the ideas that are important in the Olympic Games. The focus is on Lindsey Vonn's participation and achievements in the Olympic Games, rather than discussing the broader ideas and concepts associated with the Games.

Therefore, based on the given options and the information provided, option D. Lindsey Vonn competing in four Olympic Games is the most accurate description of the article's main topic.

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The melting of the mantle beneath Reunion, an island located in the Indian Ocean, is primarily caused by heat transfer. The mantle is a layer of the Earth located between the crust and the core.

Reunion Island is situated above a hotspot, which is an area where a plume of hot material rises from deep within the Earth's mantle. As this plume ascends, it transfers heat to the surrounding mantle rocks, causing them to reach temperatures that are sufficient for melting to occur. The melting of the mantle generates magma, which eventually rises to the surface, forming volcanic activity on Reunion Island.

While heat transfer is the main driver of mantle melting beneath Reunion, other factors such as the addition of volatiles (gases and fluids) and changes in pressure can also play a role. The introduction of volatiles can lower the melting temperature of rocks, making them more prone to melting. However, the exact role of volatiles in the melting process beneath Reunion is not as significant as heat transfer.

Pressure changes can also influence melting, but in the case of Reunion, the effect is minimal. Melting occurs more readily as pressure decreases, which is why some melting is observed at shallower depths in the mantle. However, the pressure changes in the mantle beneath Reunion are not substantial enough to be the primary cause of melting.

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Answer:

\( \boxed{ \bold{ \huge{ \boxed{ \sf{eon}}}}}\)

Explanation:

The largest formal unit of geologic time is eon .

Hope I helped!

The total momentum of the basketballs before they hit the ground is 5.292 kg·m/s.

To find the total momentum of the basketballs before they hit the ground, we need to calculate the momentum of each basketball and then add them together.

The momentum (p) of an object is given by the product of its mass (m) and velocity (v):

p = m * v

Given:

Mass of each basketball (m) = 0.6 kg

Velocity of each basketball (v) = 4.41 m/s

Momentum of each basketball:

p1 = m * v = 0.6 kg * 4.41 m/s = 2.646 kg·m/s

Since the basketballs are identical, the momentum of the second basketball will also be the same:

p2 = m * v = 0.6 kg * 4.41 m/s = 2.646 kg·m/s

Total momentum of the basketballs before they hit the ground:

Total momentum = p1 + p2 = 2.646 kg·m/s + 2.646 kg·m/s = 5.292 kg·m/s

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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.

Explanation:

In other to avoid a situation where their differences, pride, and personalities caused them to compete and publicly insult one another instead of working together they need to respectfully consider the viewpoints of each other, as well as assign individual roles that should be respected.

A model can be altered in a number of ways, by importing a database, combining information, or erasing data.

The term "scientific manipulation" in behavior analysis describes the methodical organization of a variable under research in order to enable the objective analysis of the effects of the variable presence or absence on some other measurable behavior.

To manipulate data, build a database with information from many sources, clean and rearrange the content of the database, combine and remove redundant information, and then do an analysis to uncover important information.

Understanding your needs and goals, utilizing automation tools, filtering your data, and researching various manipulation tools are some strategies for manipulating data.

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Explanation:

more massive objects will attract each other with a greater gravitational force.

The graph does not correctly represent the story because the elevator descends to the basement at a faster speed than before.

An elevator going up shows uniform linear motion, as elevator will move in a straight line with a constant speed.

This type of motion can be shown using a straight line graph.

The downward motion of an elevator descending or moving downwards can be explained as follows;

An elevator moving downwards shows uniform linear motion, as elevator will move in a straight line with a constant speed.

From the given graph we can conclude the following;

Thus, from the greater steepness of the downward motion of the elevator than the upward motion, we can conclude that the elevator descends to the basement at a faster speed than before.

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Answer:

Parallel Circuits

Explanation:

Loads can be operated on their own. If you had a series circuit, adding another light would dim the rest!

The length of the guy wire needed for the given tower is approximately 275.56 feet long.

To determine the length of the guy wire, we can use trigonometry and the given information about the tower and the angle.

Let's denote the length of the guy wire as "x". We have a right triangle formed by the guy wire, the tower, and the ground. The side adjacent to the 45° angle is the distance from the attachment point to the ground, which is (215 - 20) feet. The hypotenuse is the length of the guy wire, which we want to find.

Using the cosine function, we can relate the adjacent side, the hypotenuse, and the angle:

cos(45°) = adjacent / hypotenuse

cos(45°) = (215 - 20) / x

Simplifying the equation:

√2/2 = 195 / x

Cross-multiplying:

√2 * x = 2 * 195

x = 2 * 195 / √2

x ≈ 2 * 195 / 1.414

x ≈ 275.56 feet

Therefore, the guy wire should be approximately 275.56 feet long.

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hi <3

i believe the answer would be D, as when the temperature increases the particles have more energy and can overcome the activation energy more rapidly.

hope this helps :)

Upon increasing the temperature, the rigid bar ACB will experience thermal expansion, which may cause it to rotate. So, the correct answer is: "It will rotate around C in the clockwise direction."

As the temperature increases, the bar ACB will expand due to thermal expansion. This expansion will cause the bar to rotate around point C.

Since the expansion occurs along the length of the bar, end A will move away from C, causing the bar to rotate in a clockwise direction. The bar will not return to its original position unless the temperature is decreased, and it contracts back to its initial length.

In summary, upon temperature increase, the rigid bar ACB will rotate around point C in the clockwise direction due to thermal expansion.

So, the correct answer is: "It will rotate around C in the clockwise direction."

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Standard conditions refer to a specific set of temperature, concentration, and pressure values, which are commonly used in scientific experiments and calculations to provide a consistent basis for comparison.

In most thermodynamic calculations, standard conditions are defined as a temperature of 298.15 K (25°C), a concentration of 1 mol/L (1 M) for solutions, and a pressure of 1 atm (101.325 kPa) for gases. These conditions are important because they serve as a reference point, allowing scientists to easily compare the properties and behavior of various substances under the same set of conditions.

The use of standard conditions simplifies calculations and ensures that the results are consistent across different studies. By providing a uniform reference point, researchers can focus on the effects of specific variables, such as the type of substance, its structure, or its interactions with other substances, without having to account for variations in temperature, concentration, or pressure.

To summarize, standard conditions for most thermodynamic calculations involve a temperature of 298.15 K (25°C), a concentration of 1 mol/L (1 M) for solutions, and a pressure of 1 atm (101.325 kPa) for gases. These conditions provide a consistent basis for comparison, enabling scientists to examine the properties and behavior of various substances under the same set of conditions.

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Answer:

‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Answer:

I believe it is actually C

Explanation:

Matter and energy cannot be created or destroyed so A is incorrect

Since energy cannot be created, B is incorrect

while C and D both sound correct, D does not mention entering while C does so I believe C is correct. When i submit this answer into my quiz, i will add if i am right.

In the universe, all energy and matter are contained; no energy or matter enters or exits - the statement best describes why the universe could be considered an isolated system.

A thermodynamic system is said to be isolated if it cannot exchange either mass or energy with the outside world. In contrast to a closed system, energy can't move across isolated systems. Energy can move freely within and outside of closed systems; they are only closed to matter.

As both energy and matter can not exit from a universe, we can consider universe as a isolated system.

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Answer:

Displacement = 1725m

Explanation:

\(t = \frac{u-v}{a}\)

\(t = \frac{65-50}{0.5} = 30s\)

\(s = ut+\frac{1}{2}at^{2} \\s = 50*30 + \frac{1}{2} *0.5*30^{2} = 1725m\)

Answer:

60 - 45 = A. 15

Explanation:

Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.

A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.

The image that follows illustrates how an object appears when viewed via a plane mirror.

Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.

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Answer:

what about it i need more info

Explanation:

(a) The electric field at a point 5.0 cm from the negative charge and along the line between the two charges is -2.58825 x 10⁵ N/C, directed towards the negative charge. (b) The force on an electron placed at that point is 2.58825 x 10⁻⁵ N, directed towards the positive charge.

The electric field at a point due to a point charge is given by the equation E = k * q / r², where E is the electric field, k is the electrostatic constant (k = 9 x 10⁹Nm² /C² ), q is the charge, and r is the distance between the charges.

(a) To find the electric field at a point 5.0 cm from the negative charge, we need to calculate the electric field due to both charges and then subtract the electric field due to the positive charge from the electric field due to the negative charge.

The electric field due to the negative charge (q2) is given by E2 = k * q2 / r², where q2 = -6.4 x 10⁻⁸  C and r = 5.0 cm = 0.05 m.

Plugging in the values, we get E2 = (9 x 10 Nm² /C² ) * (-6.4 x 10 C) / (0.05 m)² = -2.58825 x 10⁵ N/C.

The negative sign indicates that the electric field due to the negative charge is directed towards the negative charge.

(b) To find the force on an electron placed at that point, we need to calculate the force due to both charges and then subtract the force due to the positive charge from the force due to the negative charge.

The force between two charges is given by the equation F = k * |q1 * q2| / r², where F is the force, q1 and q2 are the charges, and r is the distance between the charges.

The force on the electron due to the negative charge (q2) is given by F2 = k * |q2 * e| / r², where q2 = -6.4 x 10⁻⁸ C, e is the charge of an electron (e = -1.6 x 10⁻¹⁹ C), and r = 5.0 cm = 0.05 m.

Plugging in the values, we get F2 = (9 x 10⁹ Nm²/C²) * |-6.4 x 10⁻⁸ C * -1.6 x 10⁻¹⁹ C| / (0.05 m)² = 2.58825 x 10⁻⁵ N.

The positive sign indicates that the force on the electron is directed away from the negative charge, which is towards the positive charge.

So, the answers to the given questions are:

(a) The electric field at a point 5.0 cm from the negative charge and along the line between the two charges is -2.58825 x 10⁵ N/C, directed towards the negative charge.

(b) The force on an electron placed at that point is 2.58825 x 10⁻⁵ N, directed towards the positive charge.

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1. C. Mass and speed

2. B. Speed

3. B. Speed

4. C. 5.7 * 10^5 J

5. C. 71 km/h

A pendulum bob with a mass of 0.15 kg and a speed of 3 m/s has a kinetic energy at the low point of its swing of 0.675 J.

Kinetic energy is the energy that an item has as a function of motion. A force must be applied to an object in to accelerate it. We must engage considerable efforts in order to apply a force. After the task is finished, energy is transferred to the item, which then moves at a new, constant speed.

For calculation:

kinetic energy at low point,

kinetic energy = mass in kg / velocity in m/s

now,

putting the value in given formula,

kinetic energy = 0.15 / 33

                         =0.675J

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The upward speed of the sap in each vessel is approximately 1.95 m/s. To find the upward speed of the sap in each vessel, we first calculate the total flow rate of water lost by the tree, which is given as 110 g/h.

Converting this to kg/s, we obtain a flow rate of 0.0306 kg/s. Since the tree has 2000 vessels, we divide the total flow rate by the number of vessels to find the flow rate per vessel, which is approximately 1.53 x 10^-5 kg/s. Next, we determine the cross-sectional area of each vessel. The diameter of each vessel is given as 100 μm (or 100 x 10^-6 m), which allows us to calculate the cross-sectional area using the formula A = π * (diameter/2)^2. By substituting the values, we find that the cross-sectional area is approximately 2.5 x 10^-9 m^2. Finally, we can calculate the upward speed of the sap in each vessel by dividing the flow rate per vessel by the cross-sectional area. Performing the calculation, we obtain an upward speed of approximately 1.95 m/s. Therefore, the upward speed of the sap in each vessel is approximately 1.95 m/s, indicating the rate at which the sap flows through the tree's vessels to compensate for water loss through transpiration.

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Answer:

You weight would be doubled because gravitational force is doubled

2. Challenges:

a. Everyone’s body would have to adjust to the new weight and learn to walk again

b. Earth would be closer to the sun, so everything would be hotter on Earth

c. Flying airplanes and driving cars might no longer work at all (talk about how difficult this would make traveling)

3. Benefits:

a. Time would go by much slower so technically everyone would live longer

b. Balloons wouldn’t fly off anymore

4. You have to decide for yourself if you’d like it better or worse

Explanation: