in the figure, a disk, a hoop, and a solid sphere are made to spin about fixed central axes (like a top) by means of strings wrapped around them, with the strings producing the same constant tangential force on all three objects.the three objects have the same mass and radius, and they are initially stationary. rank the objects according to (a) their angular momentum about their central axes and (b) their angular speed, greatest first, when the strings have been pulled for a certain time t.

The magnitude of net force which is required to accelerate the ball is 240 Newtons.

The net force is the vector sum of all the forces which are acting on a particle or an object. The net force is a single force which replaces the effect of the original forces which are acting on the particle's motion.

F = m × a

where, F = net force,

m = mass of the object,

a = acceleration of the object

F = 0.3 × 800

F = 240N

Therefore, the net force which is required to accelerate the ball is 240 Newtons.

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If you increase the frequency of a sound wave four times, the speed will increase four times. The correct option is A.

Particles that are vibrating make up sound waves. These collide with other particles, causing them to vibrate, which allows the sound to escape the source.

Your ear drums vibrate as a result of air vibrations, which allows you to perceive sound. This vibration is transformed into messages, which proceed to your brain via a nerve.

When sound is produced, air molecules shake and collide, causing vibrations to travel between air molecules. The sound is transmitted by the vibrating particles, which also cause the ear drum to vibrate.

A sound wave's frequency can be increased four times without increasing its speed.

Thus, the correct option is A.

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Answer:

1.454 m

Explanation:

From the question,

L₂ = L₁+α(T₂-T₁).................. Equation 1

Where L₂ = Final Length, L₁ = Initial Length, α = Coefficient of Linear expansion, T₁ = Initial Temperature, T₂ = final Temperature.

Given: L₁ = 1.5 m, α = 23×10⁻⁶ K⁻¹, T₁ = 200 °C, T₂ = -1800 °C

Substitute these values into equation 1

L₂ = 1.5+[23×10⁻⁶ ×( -1800-200)

L₂ = 1.5+(23×10⁻⁶×2000)

L₂ = 1.5+(-0.046)

L₂ = 1.5-0.046

L₂= 1.454 m.

My understanding of the concept of when a baby is considered alive is based on the medical, legal, and ethical standards provided by the scientific and medical communities, and it is not based on personal beliefs or opinions.

The determination of when a baby is considered alive is a complex and nuanced issue that is influenced by a variety of factors, including medical, legal, religious, and ethical considerations.

Therefore, it is important to consult with qualified professionals in each area to gain a better understanding of this topic.

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Complete Question:

What I your view on when the baby I alive? What standard or standard are you using to form your opinion?

Okay, let's think this through step-by-step:

* The rate of energy transfer is 50 J/s

* We need to calculate the energy transferred in 4 seconds

* So we would calculate:

Energy in 4 seconds = Rate x Time

= 50 J/s x 4 s

= 200 J

So the heat energy produced within 4 seconds with an energy transfer rate of 50 J/s is 200 J.

Let me know if you have any other questions!

Answer:

My arms are doing a negative work

Explanation:

When you set something on the ground, the displacement of the object set towards the ground is in the downward direction. which means that, in this case, there is a downward displacement.

As the object is set on the ground, the force exerted by the arms on the object acts in the upward direction.

Summarily, direction of force is upwards while the direction of displacement is downwards.

Since the force and displacement act in opposite direction, a negative work is said to be done.

The distant galaxy is likely to have the larger redshift. Redshift is a phenomenon caused by the expansion of the universe.

As light from distant objects, such as galaxies, travels through space, the expanding universe stretches the wavelengths of the light, resulting in a redshift. The amount of redshift is typically quantified using the parameter "z," which represents the fractional increase in the wavelength of light. A higher value of z corresponds to a larger redshift. For example, a redshift of z = 0.1 means the wavelength of the observed light has been stretched by 10%.

Stars within the Milky Way are relatively close to us in cosmic terms and are not subject to the large-scale expansion of the universe. Therefore, their redshift values are usually much smaller compared to galaxies located at significant distances from us. Distant galaxies are typically located at vast distances, and their light has traveled through expanding space over billions of years before reaching us. This extended travel results in a cumulative effect of redshift, making their redshift values generally larger compared to nearby stars.

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The acceleration of the electron in the given electric field can be calculated using the formula a = F/m, where a is the acceleration, F is the force acting on the electron, and m is the mass of the electron.


To find the force acting on the electron, we need to use the formula F = qE, where F is the force, q is the charge of the electron, and E is the magnitude of the electric field.

Since the electron has a negative charge of -1.6 x 10^-19 C, and the electric field has a magnitude of 1 x 10^3 N/C, the force acting on the electron can be calculated as:

F = (-1.6 x 10^-19 C) x (1 x 10^3 N/C) = -1.6 x 10^-16 N

The negative sign indicates that the force is acting in the opposite direction to the electric field, which means that the electron is accelerating towards the positive plate.

Now, we can use Newton's second law, F = ma, to find the acceleration of the electron:

a = F/m = (-1.6 x 10^-16 N) / (9.1 x 10^-31 kg) = -1.76 x 10^14 m/s^2

The negative sign in the acceleration indicates that the electron is accelerating towards the positive plate, which confirms our earlier observation. Therefore, the electron is accelerating towards the positive plate with an acceleration of 1.76 x 10^14 m/s^2.

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Answer:

The Gravitational force is the answer.

Answer:

I believe Scale

Explanation:

The kinetic hypothesis of matter, which holds that all subatomic particles are constantly in motion, is supported by the observation of light specks moving around randomly in the box.

In this instance, the gas particles in the box are randomly colliding and moving, which is what is causing the smoke particles that were blown into the box to move. The movement of the gas particles in the box can be explained by the fact that the light specks, which are probably reflecting off the smoke particles, are also observed to be moving erratically and randomly.

This finding is consistent with the theory that matter is composed of minute, moving particles that collide and interact with one another in a chaotic, random manner. As the energy in the system drives the motion of the particles, it also emphasizes the significance of energy in this process.

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Answer:

convection: heat transfer by movement of currents inside a liquid, currents in the mantle, temp inside the house, red dye rises blue dye sinks,

radiation: heat from a bonfire, transfer of energy through space,

conduction: frying pan to cooking egg, candle heating up foil to chocolate chips

Explanation:

We know that

• The length of the pool is 20 meters.

• The time spent to swim the pool is 4 seconds.

• The motion is constant.

Given that there's a constant motion, we can use the equation d = v*t, where d = 20m, and t = 4sec. Let's find the constant velocity.

On the other hand, the equation of motion would be d = v*t because the motion has a null acceleration.

I'm guessing that you need the force, since the question doesn't specify I'll just use the force equation. If this is not what you wanted let me know in the comments section of this answer.

- F = 300 x 4

- F = 1200 N (newtons)

The partial pressures of gases in cells of systemic tissues result from the process of gas exchange and cellular respiration.

The partial pressures of gases in cells of systemic tissues result from the process of gas exchange and cellular respiration.

During cellular respiration, cells metabolize glucose and produce carbon dioxide (CO2) as a waste product. At the same time, oxygen (O2) is required for cellular respiration to occur.

The partial pressure of a gas refers to the pressure exerted by that gas in a mixture. In systemic tissues, oxygen diffuses from the bloodstream into the cells, where it is consumed in cellular respiration. As a result, the partial pressure of oxygen decreases in the cells.

Conversely, carbon dioxide produced by cellular respiration diffuses out of the cells into the bloodstream, leading to an increase in the partial pressure of carbon dioxide in the cells.

The partial pressures of gases in cells of systemic tissues are determined by the balance between gas diffusion and the metabolic activities of the cells. This allows for efficient gas exchange and the supply of oxygen for cellular respiration while removing carbon dioxide waste from the cells.

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Answer:

should be D

Explanation:

pls make this the brainliest

Answer:

Magnetization is the density of magnetic dipole moments that are induced in a magnetic material when it is placed near a magnet. ... Magnetization is also known as magnet polarization.

Answer:

When two objects collide the total momentum before the collision is equal to the total momentum after the collision (in the absence of external forces). This is the law of conservation of momentum. It is true for all collisions.

Explanation:

...

Answer:

When two objects collide the complete momentum before the collision is similar to the complete momentum afterwards the collision (in the absence of outside forces) . This is the law of conservation of momentum . it's accurate for all collisions .

Explanation:

F = MA

200 = 100 * A

A = 200/100

A = 2m/sec^2

The electric potential in a certain region is given by the equation V(x,y,z) = 3αx2y3 - 2γx2y4z2 where the potential is in volts when the positions are given in meters. The constants in this equation are α = 3.9 V/m5 and γ = 0.99 V/m8

A) The x-component of the electric field can be found by taking the partial derivative of the electric potential with respect to x:
Ex = -∂V/∂x = -6αxy^3 + 4γxy^4z^2
B) The y-component of the electric field can be found by taking the partial derivative of the electric potential with respect to y:
Ey = -∂V/∂y = -9αx^2y^2 + 8γx^2y^3z^2
C) The z-component of the electric field can be found by taking the partial derivative of the electric potential with respect to z:
Ez = -∂V/∂z = 4γx^2y^4z
D) The magnitude of the electric field can be found by plugging in the given values of x1, y1, and z1 into the equations for Ex, Ey, and Ez, and then taking the square root of the sum of the squares of the components:
Ex1 = -6αx1y1^3 + 4γx1y1^4z1^2 = -6(3.9)(-5.0)(2.0)^3 + 4(0.99)(-5.0)(2.0)^4(1.5)^2 = 468.72 V/m
Ey1 = -9αx1^2y1^2 + 8γx1^2y1^3z1^2 = -9(3.9)(-5.0)^2(2.0)^2 + 8(0.99)(-5.0)^2(2.0)^3(1.5)^2 = 351.36 V/m
Ez1 = 4γx1^2y1^4z1 = 4(0.99)(-5.0)^2(2.0)^4(1.5) = 237.6 V/m
E = √(Ex1^2 + Ey1^2 + Ez1^2) = √(468.72^2 + 351.36^2 + 237.6^2) = 637.87 V/m = 637.87 N/C

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Answer:

because the carpet creates more friction when sliding across which makes it slower while the slickness of the wood makes less friction

Mass, m of the computer is 0.82kg.

Given the following data:

Weight of computer = 8N

Acceleration due to gravity = 9.8m/s

Weight is the product of the mass of an object or body multiplied by gravity.

Mathematically, weight is:

\(\text{W = mg}\)

Where:

W represents the weight of a computer measured in Newton.

m represents the mass of a computer measured in kilograms.

a represents acceleration due to gravity measured in meter per seconds.

\(\text{m}=\frac{\txet{W}}{9}\)

\(\text{m}=\dfrac{8}{9.8}\)

\(\text{m}=0.81632653\thickapprox0.82\)

Mass, m = 0.82kg.

Therefore, the mass of the computer is 0.82kg.

Answer: It prevents us from seeing most of the galactic disk with visible and ultraviolet light.

(hope this helps) :)

Answer:

it is b. components are unevenly distributed

Explanation:

in homogeneous mixture components are evenly distributed but in heterogeneous mixture they are not evenly distributed

The acceleration of the plane is -2.1 m/s².

To find the acceleration of the plane, we can use the formula:

acceleration = (final velocity - initial velocity) / time

Given:

Initial velocity (u) = 70 m/s

Final velocity (v) = 7 m/s

Time (t) = 30 seconds

Using the formula:

acceleration = (7 m/s - 70 m/s) / 30 s

acceleration = (-63 m/s) / 30 s

acceleration = -2.1 m/s²

The acceleration of the plane is -2.1 m/s². Note that the negative sign indicates deceleration, as the plane is slowing down.

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Answer:within the focal length of the lens, provided the focal length is shorter than the near point distance.

Explanation:Hope it helps

Answer: B) Cells come in different shapes and different sizes.

Explanation:

Cell is the basic unit of life. Each cell forms the an integral component of the body of the living organism. The cell structure and function varies from organism to organism. The cells of the plants are comparatively larger than the animal cells. The plant cells are usually rectangular in shape whereas that of animals are usually circular or round in shape. The shape and size of the cells can vary depending upon the function and structure of the organism.

In first scenario, the electric field vector's magnitude would be halved. In second scenario, the electric field vector's magnitude at point P would be doubled.

Charge and charge density are two concepts of electricity, and the following are the differences between them:

Charge: Charge is a property of matter that causes it to experience electrical and magnetic phenomena. It is the fundamental quantity that is responsible for electric phenomena. The SI unit of charge is Coulomb (C), and its symbol is ‘Q’. The charge of an object can be positive or negative or neutral. The charge on an object is measured using an electrostatic balance or an electroscope.

Charge Density: Charge density refers to the amount of charge per unit volume or unit area of a substance. Charge density is the amount of charge per unit length on a given rod. Its SI unit is Coulomb per meter cubed (C/m³). The charge density on an object can be either uniform or non-uniform, i.e., it may be constant over the surface area or may vary throughout it. An electric field vector E is produced by a rod carrying a charge distributed uniformly over the length of the rod. Let the magnitude of the charge be Q. Now, let us consider the following scenarios:

a) How does the field change if rod length is doubled using the same amount of charge?

Assume the point P is still located distance d above the left end of the rod. In this situation, if the rod's length is doubled, the charge will remain the same. Since the charge is distributed uniformly, the charge per unit length would be half of the initial value.

Therefore, the electric field vector's magnitude would be halved.

b) How does the field change if rod length is doubled using the same amount of charge density? Assume the point P is still located distance d above the left end of the rod.In this situation, if the rod's length is doubled, the charge density will remain constant. So, the total charge on the rod will be doubled, and the charge per unit length will remain constant.

As a result, the electric field vector's magnitude at point P would be doubled.

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The sound signal helps to caution and let other people know the exact

position or location during sailing in limited visibility conditions.

Sailors are in which charge of controlling and movement of ships. In limited

visibility conditions such as during fogs, one prolonged blast plus two short

blasts every two minutes are done.

This helps to alert people and other sailors of their location at sea to prevent

accidents and death.

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The sound signal helps to know the exact location during sailing in foggy conditions.

Sailors are the in charge of controlling and movement of ships. In limited visibility conditions such as fogs, one prolonged blast plus two short blasts every two minutes are done.

This helps to caution people and other sailors around their location at the sea to prevent accidents and death.

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