a 2.0×10−2 kg tumor is treated with a high-energy proton beam. if the equivalent dose delivered to the tumor is 1400 rem , how much energy did the tumor absorb?

Simply put, no. Try not to be hard on you if this is the first time you've heard it; in some cases, a belief was once accurate. A bulk of energy storage units kept in fridge are basic AA, AAA, C, & D batteries.

There are three main battery kinds that may be used by consumers. They are lithium ion, nickel metal hydride, and alkaline. Each kind has benefits and drawbacks. Each of them has a unique position in the history of technology.

With the greatest energy density of just about any battery cell, lithium batteries are made of this very light metal. As a result, they have a higher energy capacity than battery systems or any other separate bat of a similar size. Additionally, they work admirably in the both cold and warm environments.

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Answer:

The solution is unsaturated.

Explanation:

Saturated solutions are those solutions with the maximum amount of solute completely dissolved by the solvent. This indicates that although more solute is added, it does not dissolve. In this case the amount of solute is equal to the solubility coefficient.

The supersaturated solution  is one in which the amount of solute exceeds the solubility of the solvent, that is, it has a greater amount of dissolved solute than that which it admits at that temperature. In this case a solution contains solute above the solubility coefficient.

A solution is considered to be unsaturated if the mass of dissolved solute is less than that corresponding to that of saturation. This indicates that it is possible to add more solute and that it dissolves. In this case the solution contains solute below the solubility coefficient.

The solubility of barium nitrate is 9.02 g/100 g H₂O at 20°C.

A 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°C. This is: 15.2 g /200 g H₂O.  Dividing by two you get: 7.6 g /100 g H₂O

Comparing with the solubility of barium nitrate, you can see that the mass of dissolved solute is less than the corresponding one. This indicates that the solution is unsaturated.

The moment of inertia of the skater when their arms are extended is 2.724 kg·m².

In the given question, the mass of the skater is 68.5 kg. The radius of cylinder, r = 0.115 m. The length of arm, l = 0.875 m. The percentage of mass in each arm is 5%.

The moment of inertia of a skater when the arms are pulled inward is given as: I_b = 0.453 kg.m²

Let's calculate the moment of inertia of the skater when the arms are extended. The skater is considered to be composed of two parts, body and arms.

The moment of inertia of the body can be calculated as:

I_b = (1/2) M_b R_b² ... (1)

Here, M_b is the mass of the body, and R_b is the radius of the body. The given radius, r = 0.115 m is the radius of the body. Therefore, R_b = 2r = 0.23 m. The mass of the body can be calculated as:

M_b = (1 - 0.05) M = 0.95 (68.5 kg) = 65.075 kg.

Substituting these values in equation (1), we get:

I_b = (1/2) × 65.075 × (0.23)²= 1.106 kg.m²

The moment of inertia of each arm can be calculated as:

I_a = (1/3) M_a L_a² ... (2)

Here, M_a is the mass of each arm, and L_a is the length of each arm. The percentage of mass in each arm is 5%. Therefore, the mass of each arm can be calculated as:

M_a = 0.05 M = 0.05 (68.5 kg) = 3.425 kg.

Substituting the given values in equation (2), we get:

I_a = (1/3) × 3.425 × (0.875)²= 0.809 kg.m²

The total moment of inertia of the skater is given by: I = I_b + 2I_a (since there are two arms) = 1.106 + 2(0.809) = 2.724 kg.m²

Therefore, the moment of inertia of the skater when their arms are extended is 2.724 kg·m².

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The two quantities that are measured in the same units are "length" and "distance".

Both length and distance can be measured using units such as centimeters, meters, kilometers, inches, feet, or miles.

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The only allowed subshells from the given collection are 3p7, 4s3, 5s1, 5g15, and 1d1.
The 5s? is not an allowed subshell because the 5s orbital is completely filled and has no available orbitals for electrons.
The id? is not an allowed subshell because the id orbital does not exist.
The 3p? is not an allowed subshell because the 3p orbital is already filled with 6 electrons and has no available orbitals for additional electrons.

What is subshell?
The electrons in an atom are arranged into shells which encircle the nucleus, with each shell advancing away from the nucleus. Atomic orbitals make up subshells, whilst also electron shells are composed of one or even more subshells. While electrons in different shells or subshells have different energies, those within the same subshell share the same energy. In fact, shells are a collection of subshells that have the same quantum number, and subshells are a group of orbitals that have the same quantum numbers number as well as angular momentum quantum number.

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Meteoroids, small rocky or metallic objects that orbit the Sun, often disintegrate rather than reaching the Earth's surface due to several factors like Atmospheric friction, Compression and stress etc.

Meteoroids, small rocky or metallic objects that orbit the Sun, often disintegrate rather than reaching the Earth's surface due to several factors:

1. Atmospheric friction: When a meteoroid enters the Earth's atmosphere, it encounters the resistance of the air molecules. This rapid interaction generates intense heat through compression, leading to the vaporization or melting of the meteoroid's outer layers. The intense heat causes the meteoroid to disintegrate into smaller fragments or vaporize completely.

2. Compression and stress: The rapid deceleration caused by atmospheric friction exerts significant compression and stress on the meteoroid. Depending on its composition and structural integrity, the meteoroid may not be able to withstand the forces, leading to fragmentation and breakup. Weaker or less cohesive meteoroids are more prone to disintegration.

3. Size and composition: Meteoroids vary in size, ranging from tiny grains to larger objects several meters in diameter. Smaller meteoroids have a higher surface-to-volume ratio, meaning that a larger portion of their mass is exposed to atmospheric forces. Consequently, smaller meteoroids are more likely to disintegrate due to the increased surface area experiencing atmospheric friction. Moreover, meteoroids composed of weaker materials, such as loosely bound aggregates or porous structures, are more susceptible to disintegration.

4. Speed and angle of entry: The speed and angle at which a meteoroid enters the atmosphere influence the intensity of atmospheric friction and the likelihood of disintegration. Higher entry velocities and steeper angles generally result in more significant atmospheric heating and stress, increasing the probability of disintegration.

It is important to note that not all meteoroids disintegrate entirely. Some larger and more robust meteoroids can survive atmospheric entry and reach the Earth's surface as meteorites.

However, the majority of meteoroids, especially smaller ones, disintegrate and burn up in the atmosphere, producing the visual phenomenon known as meteors or shooting stars.

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The forces have a same magnitude, act in opposing directions, and result in a net force of zero. The forces produce a net force in the direction of motion that is in the same direction, but they are not equal in size.

All forces operating on an automobile travelling uniformly at a steady speed are balanced. In this instance, the two opposing forces air resistance and friction perfectly balance the force that the wheels are exerting on the ground. However, the instant your foot leaves the gas pedal, there is no longer an applied force, and the forces are out of balance: Now when the car is out of balance, the forces pushing backward on it cause it to slow down; this is known as negative acceleration.

Because there wasn't enough upward force (i.e., regular force from the chair) to balance the extra mass, you would speed downward as a result of the unbalanced force, possibly breaking your tailbone as you plunged through the chair to the floor.

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Answer.

Conduction

Convection

explanation.

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.

a. The acceleration of the system is 0.21 m/s^{2}

b. The equation of the force of friction is -

tension force - force of friction = unknown mass x its acceleration and force of friction is equal to product of coefficient of friction and                    normal force acting on unknown mass .

c.  Newton's second law of motion applies when there are unbalanced forces acting on an object. According to the second law, the mass and the net force acting on the object both affect how quickly an object is accelerating . An object's acceleration is directly proportional to the net force applied and inversely proportional to the object's mass. An object's acceleration increases as the amount of force exerted on it does. A decreasing acceleration is caused by an increase in an object's mass.

The unknown mass is nearly equal to 30 kg .

What is acceleration ?

the rate at which the speed and direction of a moving object vary over time is termed as acceleration . An object going straight ahead  when it accelerates or decelerates,  is said accelerated. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

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Answer:

Explanation:

140 J

The kinetic energy of the baseball can be calculated using the equation 1/2 mv2. Paragraph 2 tells us that the average velocity of the ball is 30 m/s and its mass is 150 g, which is equivalent to 0.15 kg.

KE = (½)(0.15 kg)(30 m/s)2

KE = (½)(0.15)(900)

KE = (0.15)(450) = 67.5 J

When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.

The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.

According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.

However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.

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Answer:

the x and y values

Explanation:

because on the table the x is the input and y is the output

The tension in the cord is 4.6 N

According to Newton's second law, an object's acceleration is determined by two factors: the net force acting on the object and the mass of the object.

So, if we chose the positive +x uphill for the FedEx box of mass m2= 1.0 kg and +ve axis for m1 = 3.0 kg such that their accelerations have the same magnitude.

As we apply Newton's second law to each box, we discover that:

\(\mathbf{F - T -m_2gsin\theta = m_2a}\)

where;

Thus, the first equation can be rewritten as:

\(\mathbf{F-m_2gsin\theta = (m_1+m_2)a}\)

Now, the acceleration moving in the same direction can be computed as:

\(\mathbf{a=\dfrac{12N (1.0 kg)(9.8 \ m/s^2)sin 37^0}{(1.0+3.0)kg}}\)

a = 1.53 m/s²

Finally, the tension \(\mathbf{T=m_1a}\) = (3.0 kg) (1.53 m/s²)

= 4.6 N

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Answer: the atom is mostly empty space with a tiny, dense, positively-charged nucleus

Explanation: Rutherford's gold foil experiments involved firing positively charged alpha particles at a piece of gold/metal foil. The alpha particles that were fired at the gold foil were positively charged. Most of the time, the alpha particles would pass through the foil without any change in their trajectories, which is what was expected if JJ Thomson's plum pudding model of the atom was correct. However, occasionally the alpha particles would be deflected to some degree, and sometimes an alpha particle would bounce back directly toward the experimenter. Rutherford likened this to firing a 15-inch artillery shell at a sheet of tissue paper and the shell came back to hit you.

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Rutherford's gold foil experiment demonstrated the concept of the nucleus of the atom.What is Rutherford's gold foil experiment?

Rutherford's gold foil experiment is an experiment that was conducted by Ernest Rutherford in 1911 to determine the structure of the atom. Rutherford bombarded alpha particles at thin gold foil and noted their trajectory and path.The experiment was conducted to answer the prevailing model of the atom's structure, which was the Thomson atomic model.

According to the Thomson atomic model, the atom's positive charge is evenly distributed throughout the atom, like raisins in a pudding. Rutherford's experiment refuted this hypothesis and provided a new model that supported his findings.

The findings of the gold foil experiment:

Rutherford's experiment led him to conclude that the positive charge of the atom is concentrated in the nucleus, a central part of the atom. In this model, electrons orbit the nucleus, like planets orbiting the sun.

Rutherford's gold foil experiment demonstrated that the atom is made up of mostly empty space, with a small, dense, and positively charged nucleus at the center. This discovery paved the way for further research into atomic structure and the discovery of subatomic particles like protons and neutrons.

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Answer:

La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.

Explanation:

La segunda ley de Newton, llamada ley fundamental o principio fundamental de la dinámica, plantea que un cuerpo se acelera si se le aplica una fuerza.

De esta manera, esta ley establece que las aceleraciones que experimenta un cuerpo son proporcionales a las fuerzas que recibe. Dicho de otra forma, la aceleración de un cuerpo es proporcional a la fuerza neta que se le aplica. Cuanto mayor es la fuerza que se le aplica a  un objeto con una masa dada, mayor será su aceleración.

La segunda Ley de Newton se expresa matemáticamente como:

F = m*a

Donde:

En este caso:

Reemplazando:

F= 20 kg* 4 m/s²

Resolviendo:

F= 80 N

La fuerza que será necesaria aplicar a un cuerpo de 20kg de masa para imprimirle una aceleración a=4m/s² es 80 N.

The maximum height that the rocket reaches is 610 m.

The rocket will experience two paths

Non-uniform motion's formula

d = v₁t + 0.5at²

v₂ = v₁ + at

v₂² = v₁² + 2ad

From A to B

From B to C

The distance from A to C is the maximum height

h = d AB + d BC

h = 100 + 510

h = 610 m

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Answer:

0.39 J/g°c

Explanation:

= heat / unit of mass × unit of temperature

986.75J/16.75g

= 58.9 J/g

∆T=175°c - 25°c = 150°c

986.75 / 150°c = 6.578

986.75 / 16.75g.150°c = 0.30 j/g°c

Answer:

4,524,660 N

Explanation:

Assuming the submarine's density is uniform, 1/9th of the submarine's mass is equal to the mass of the displaced water.

m/9 = (1026 kg/m³) (50 m³)

m = 461,700 kg

mg = 4,524,660 N

Answer:

Explanation:

Let's look at a mathematical representation of this. The equation for tis is just a souped up version of Newton's 2nd Law:

F - f = ma. It an object is moving at a constant speed, the acceleration of that object is 0. That changes this equation to

F = f which states that the applied Force equals the frictional force, choice a.

Two strings are vibrating at the same frequency of 200 hz. after the tension in one of the strings is decreased, an observer hears seven beats each second when the strings vibrate together new frequency is 218 hertz frequency is decreases

Two strings are present in this query; they are two strings, mm. They are both vibrating at the same pitch. That equals 2:27 Hz. Let's assume that the tension after one string is constant tension and that this is a result of tension. As a result, one of the strings' tensions lowers. In this case, observer a little frequency He perceives a nine-beat rhythm while the strings are vibrating in unison. Decide on the new frequency in the adjusted strength. Therefore, as far as we are aware, the bid frequency vs the beat frequency is the difference in frequency. Both the initial and the final frequencies are as follows. Consequently, this is how beat frequency is expressed.

The beat frequency is therefore stated as being nine at night. Because whenever the two strings vibrate together, beats are created. We have nine beats, so there you have it. The initial frequency is 227 Hz when these two strings are vibrating together. The new modified frequency is being calculated. This f. dash therefore equals 2: 7 -9. Therefore, 218 Hz is what f dash equals. We have therefore changed our frequency to this. As a result, no beats will be made when these two strings are vibrating. Therefore, frequency will likewise drop if tension in this string reduces. As a result, it is clear that the starting frequency is 2 27 hertz. If you lower the tension, you'll notice that the new frequency is 218 hertz. So you can see the frequency is decreases

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Work is characterized as the resultant action when a force moves an object in the force's direction.

It is clear what the word "force" means. The terms "push" and "pull" are perfectly acceptable at this level to describe forces. An object does not have a force inside of it or within it. Another object applies a force to the first.

When two items come into contact with one another physically and interact, these kinds of forces are involved. Frictional, tensional, normal, air resistance, applied, and spring forces are examples of the several types of contact forces.

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Answer:

6,400

Explanation:

i made sure  the other person was right and i got the same answer

The  magnitude and direction of the force on the charge​ is -12 N opposite the electric field

To calculate the force on a charge in an electric field, we make use of the formula below.

Formula

F = E×Q .......................... Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Note: The negative sign indicates that the force is in the direction negative of the electric field.

Hence, The  magnitude and direction of the force on the charge​ is -12 N opposite the electric field

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Answer: A edge 202694020

Explanation:

Her partner's final velocity is roughly -1.04 m/s, or 1.04 m/s in the opposite direction from her motion.

How do velocity and speed differ?

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, velocity is a vector, whereas speed is a scalar value.

What is velocity, for instance?

Velocity can be defined as the rate at which something moves in a specific direction. as the speed of a car driving north on a highway or the pace at which a rocket takes off.

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The velocity of the wind that is affecting the plane relative to the observer is 5.5 m/s north.

Option A is the correct answer.

The velocity of the wind relative to the observer is the velocity of the wind measured from the observer as a frame of reference.

The relative velocity of the plane from the observer as the frame of reference is calculated as follows;

Vr² = Vp² + Vw²

where;

The given parameters;

Vr² = Vp² + Vw²

Vr = √(Vp² + Vw²)

Vr = √(45.8² + 40.3²)

Vr = 61 m/s

The velocity of the wind that is affecting the plane relative to the observer is calculated as follows;

Vo = 45.8 m/s north - 40.3 m/s south = 5.5 m/s north

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Answer:

Are you sure this is physics?

Also,

1. False. White blood cells do.

2. False. Every seven years your cells are in the process of dying and being replaced. Although some cells don't die but your cells don't last for more than a period of 7 years.

3. True.

4. True.

5. False. Explained in 2.

The sign of the vertical position is positive, velocity is negative, and acceleration during the downward part of the trajectory of the ball is negative.

option B is the correct answer.

During a projectile motion, the vertical velocity of a projectile decreases as the projectile moves upwards and eventually become zero as the object reaches the maximum height.

As the object begins move downwards, the vertical velocity of the projectile increases and eventually becomes maximum before the object hits the ground.

During the horizontal motion of a projectile, the horizontal velocity of the projectile does not change. That is the initial horizontal velocity of the projectile equals the final horizontal velocity of the projectile.

Thus, we can conclude the following about the signs, as the ball falls down;

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The principal difference between an MHD generator and a conventional generator lies in their operational mechanisms.

While conventional generators work by converting mechanical energy into electrical energy through the use of electromagnetic induction, MHD generators produce electricity by utilizing a combination of magnetic and electric fields to ionize a conductive gas and create a flow of charged particles.

Additionally, MHD generators can operate at higher temperatures and pressures than conventional generators, allowing for more efficient energy production.

However, MHD generators are more complex and expensive to build and maintain than conventional generators, and they require a constant source of high-temperature gas to function.

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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.