a recycling center uses magnetic damping to detect and separate certain materials. which materials will respond to this method? i. ferromagnetic conductors

Answer:

equal to

i hope this helps

Answer:

Because of gravity

Explanation

The moon has 1.62m/s2

Answer:3982/27.6=144.275

Explanation:The trip took 144 hours as 3982/27.6 is about 144.

The temperature of the water after 30g of steam has condensed will be approximately 52.14°C.

To solve this problem, we need to consider the energy transfer that occurs when steam condenses into water. The energy released by the condensing steam will be absorbed by the water, resulting in a temperature change.First, let's calculate the energy released when 30g of steam condenses. The specific latent heat of steam is given as 2.26 × 10^6 J/kg, so the energy released by 30g of steam can be calculated as:

Energy released = (30g) × (2.26 × 10^6 J/kg) = 6.78 × 10^7 J

Next, we need to calculate the energy required to raise the temperature of the water from 20°C to the final temperature. The specific heat capacity of water is given as 4200 J/kgK, and the mass of the water is 500g. Therefore, the energy required can be calculated as:

Energy required = (500g) × (4200 J/kgK) × (final temperature - 20°C)

Since the energy released by the steam is equal to the energy required by the water, we can set up the equation:

6.78 × 10^7 J = (500g) × (4200 J/kgK) × (final temperature - 20°C)

Now, we can solve for the final temperature:

(final temperature - 20°C) = (6.78 × 10^7 J) / ((500g) × (4200 J/kgK))

(final temperature - 20°C) = 32.14°C

final temperature = 32.14°C + 20°C

final temperature ≈ 52.14°C

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Answer:

C

Explanation:

First find the electrical wattage

W = I^2 * R

R = 12 ohms

I = 2 amps

Wattage = 2^2 * 12

Wattage = 4* 12

Wattage = 48 watts.

Now you need to use the power formula

Work = Power * Time

Work = ?

Power = 48 watts

Time = 3 minutes = 3 * 60 = 180 seconds.

Work = 48 * 180

Work = 8640 J

That's C

Answer:

jhon Dalton described it

Explanation:

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John Dalton described atoms as small spheres that could not be divided into anything smaller.

John Dalton is the scientist who described atoms as small spheres that could not be divided into anything smaller. He proposed his atomic theory in 1803, which included the postulate that all matter is composed of tiny, indivisible particles called atoms. D

Dalton's theory also stated that atoms of different elements are unique in their mass and chemical properties and combine in simple whole-number ratios to form compounds. Dalton's model of the atom was a solid, indivisible sphere that was the smallest possible unit of an element.

While this model has been refined and updated with new discoveries, Dalton's contributions laid the foundation for the modern understanding of atomic structure and chemical reactions.

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Answer:

You can download^{} the answer here

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Answer:

the ratio of protons to neutrons

Explanation:

Nuclear stability is based on the ratio of protons to neutrons. The nuclear space is made up of protons and neutrons that occupies the nucleus of an atom.

For every atomic nucleus, there is a specific neutron/proton ratio which ensures the stability of the nucleus.

For sodium, Na, the neutron/proton ratio for stability is 12/11.

Any nucleus with a neutron/proton combination different from its stability ratio will be unstable.

The given statement "Average velocity can be expressed as (Δs/Δt) where s(t) is the position function." is True. Average velocity is defined as the change in position over a given time interval.

This can be expressed mathematically as (Δs/Δt), where Δs is the change in position and Δt is the change in time. The position function, s(t), gives the position of an object at any given time t. By calculating the difference in position over a specific time interval, we can determine the average velocity of the object during that interval. This calculation is a fundamental concept in calculus and physics, as it allows us to understand how objects move and change over time. Therefore, it is true that average velocity can be expressed as (Δs/Δt) where s(t) is the position function.

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Thermodynamics can be said to be a branch of Physics which involves the transfer of heat and other energy forms.

Thermal energy is the energy possesed by a system due to its temperature.

In thermodynamics, during the transfer of thermal energy, energy is wasted due to entryopy. And entropy is the measure of disorder of a system.

Therefore, in amy thermodynamic system that deals with the transfer of thermal energy, the most ideal state for that system is Entropy

ANSWER:

A. Entropy

If the body temperature was 10°C, the approximate time of death would be between 12 and 36 hours, depending on the surroundings and other variables.

However, it's crucial to note that the time of death can be influenced by several factors like the environment, clothing, and the person's physical state. The time of death can also be estimated by measuring the body temperature, also known as algor mortis.

After death, the body temperature decreases at a rate of roughly 1.5°C per hour, though this might change depending on the surroundings and other variables. It is impossible to pinpoint the exact time of death if the body temperature was 10°C, although it may indicate that death happened several hours earlier because the body temperature will continue to drop after death.

However, other techniques, like lividity, rigor mortis, and inspection of the stomach contents, are more accurate, hence it is not advised to utilize this method alone to establish the time of death. For a more precise estimation of the time of death, a forensic specialist should be consulted.

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Therefore, the angle between the emergent ray and incident ray is approximately 19.47°.

We know that μ = sin i / sin r

where μ is the refractive index, i is the angle of incidence, and r is the angle of refraction.

The angle between the incident ray and the emergent ray is the angle of refraction.

The formula for calculating the angle of refraction is given as sin r = μair / μglass sin i

= sin i / 1.5

The angle between the emergent ray and incident ray can be calculated as shown below;

sin r = μair / μglass sin i

Sin r = 1 / 1.5 sin i

Sin r = 0.6667 sin i (radians)

If the angle of incidence is 30°, the angle between the emergent ray and incident ray can be calculated as follows;

Sin r = 0.6667

sin 30°Sin

r = 0.3333

r = sin-1(0.3333)

r = 19.47°

In optics, the incident ray is a straight line that corresponds to the direction of the light before it meets an interface. The angle between the incident ray and the normal is referred to as the angle of incidence. When a light ray passes from a denser medium to a less dense medium, the angle of incidence is greater than the angle of refraction, causing the light ray to bend away from the normal.The angle between the refracted ray and the normal is referred to as the angle of refraction. When a light ray passes from a less dense medium to a denser medium, the angle of incidence is less than the angle of refraction, causing the light ray to bend towards the normal.

The incident ray is always perpendicular to the normal as it hits the surface of the medium. This implies that the angle of incidence is zero. The angle between the emergent ray and the incident ray is called the angle of refraction. The angle of refraction is equal to the angle between the emergent ray and the normal, which is the line that is perpendicular to the boundary between the two media.

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Answer:

Answer:

The answer is D current

Explanation:

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A meteorologist tries to forecast the weather by comparing the past and Current areas on a weather map.

Applying science and technology to forecast the weather is known as weather forecasting. It involves determining the atmosphere's state at a specific location and moment in time. Informally for thousands of years and formally since the 19th century, people have tried to predict the weather.

Weather predictions are created by gathering quantitative information on the status of the atmosphere, land, and ocean at a specific location and using meteorology to predict how the atmosphere will change there.

Weather forecasting is now based on computer-based models that consider various atmospheric parameters, as opposed to the past method of manually calculating changes in barometric pressure, current weather conditions, and sky condition or cloud cover.

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a) Answer: On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

The equator receives an equal day and night (12 hours each) regardless of the day of the year due to the Circle of Illumination, which is a line that separates the day side of the earth from the night side of the earth. The Circle of Illumination separates the sunlit and dark sides of the earth. The earth's axis is at a 23.5-degree angle to the plane of its orbit around the sun, causing different latitudes to receive different amounts of sunlight throughout the year. On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

b)  Answer: The earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

On December 22nd, between the latitudes of the Tropic of Cancer (23.5°N) and the Arctic Circle (66.5°N), 24 hours of daylight is experienced. This occurs because the earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

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Answer:

A. 10m/s

Explanation:

1 km/h = 5 / 18 m/s

36 km/h

= 36 x 5 / 18

= 2 x 5

= 10 m/s

Answer:

earthquakes are violent ruptures that happen in the earth that causes a giant ravine and they happen when the plates of earth separate

Answer:

    #_photons = 30 photons / s

Explanation:

Let's start by finding the energy of a photon of light, let's use the Planck relation

         E = h f

the speed of light is related to wavelength and frequency

         c = λ f

we substitute

         E = h c /λ

         E₀ = 6.63 10⁻³⁴ 3 10⁸/500 10⁻⁹

         E₀ = 3.978 10⁻¹⁹ J

now let's use a direct proportion rule. If the energy of a photon is Eo, how many fornes has an energy E = 1.2 10⁻¹⁷ J in a second

          #_photons = 1 photon   (E / Eo)

          #_photons = 1  1.2 10⁻¹⁷ /3.978 10⁻¹⁹

          #_photons = 3.0 10¹

          #_photons = 30 photons / s

Answer:

He traveled 9km

Explanation:

To do this problem you need to use the equation which is Speed= distance/time and this problem gives you the speed which is 18 km/h and it gives you the time 1/2 hour so you write the equation 18= d/ 1/2 which his distance is 9km

When the solenoid carries a current of 0.780 a, 0.00372 J energy is stored in its magnetic field

The energy stored in a magnetic field of an inductor (such as a solenoid) is given by:

U = (1/2) x L x \(I^2\)

where U is the energy stored,

L is the inductance, and

I is the current flowing through the inductor.

To calculate the inductance of the solenoid, we can use the formula:

L = \(\frac{ (\mu_0 \times N^2 \times A)}{l}\)

where \(\mu_0\) is the permeability of free space (4π x \(10^{-7}\) T·m/A),

N is the number of turns,

A is the cross-sectional area of the solenoid, and

l is the length of the solenoid.

The cross-sectional area of the solenoid is given by:

A = π x \(r^2\)

where r is the radius of the solenoid (half of its diameter).

So, first, let's calculate the inductance:

r = 1.20 cm / 2 = 0.60 cm = 0.0060 m

A = π x \((0.0060 m)^2\) = 1.13 x \(10^{-4}\: m^2\)

l = 8.00 cm = 0.0800 m

N = 60

μ0 = 4π x \(10^{-7}\) T·m/A

L = \(\frac{ (\mu_0 \times N^2 \times A)}{l}\)

L = \(\frac{(4\pi \times 10^{-7} \times 60^2 \times 1.13 \times 10^{-4} ) }{0.0800 m}\)

L = 0.0128 H

Now we can use the formula for the energy stored in the magnetic field:

U = (1/2) x L x \(I^2\) = (1/2) x 0.0128 H x \((0.780 \:A)^2\)

U  = 0.00372 J

Therefore, the energy stored in the magnetic field of the solenoid is 0.00372 J.

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Answer:

In an atomizer, or perfume sprayer, you squeeze a rubber bulb to squirt air through a tube. Because of the Bernoulli principle, the air rushing through the tube has a lower pressure than the surrounding atmosphere. ... The perfume is pushed out of the tube and sprays into the air as a fine mist.

Explanation:

The **value** of the current in the given resistive circuit with a 20V battery on the left side, a 10V battery on the right side, and a 10Ω resistor will be **1 Amp**. The **conventional direction** of the current will be **from left to right**.

To determine the current in the circuit, we can use Ohm's Law, which states that the current (I) flowing through a resistor is equal to the voltage (V) across the resistor divided by the resistance (R). In this case, the total voltage is 20V - 10V = 10V, and the resistance is 10Ω. Thus, the current is 10V / 10Ω = 1 Amp.

The conventional direction of current is defined as the direction of positive charge flow. In this case, since the positive voltage is on the upside for both batteries, the current will flow from the higher potential (20V) to the lower potential (10V), which corresponds to a left-to-right direction. Therefore, the current in the circuit will be 1 Amp flowing from left to right.

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The student's claim that "The only experimentally measurable external force exerted on the planet is the force due to gravity from the star" is partly supported by the evidence. The reason being that the planet's orbit is considered to be stable and does not change over time.

The planet's motion and orbit are affected by gravity. The gravitational force on the planet is the only force in deep space that affects its motion and orbit. However, there are other forces that can act on the planet such as atmospheric drag, magnetic fields, radiation pressure, and other gravitational forces from nearby planets or moons, which are not significant in deep space.

These forces can cause a change in the planet's motion and orbit. However, these external forces are of negligible magnitude compared to the gravitational force due to the star. Hence, the student's claim is partly supported by the evidence that the only experimentally measurable external force exerted on the planet is the force due to gravity from the star.

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The hydronium ion concentration in the HCl solution with a pH of 4.65 is approximately 2.2 x 10⁻⁵ M. On the other hand, the hydroxide ion concentration in the NH₃ solution is approximately ≈ 2.2 x 10⁻⁵ M

To calculate the hydronium ion (H3O+) concentration in a solution of HCl with a pH of 4.65, you can use the formula: pH = -log [H3O+].

First, you'll need to rearrange the formula to solve for [H3O+]. You can do this by taking the inverse logarithm (antilog) of both sides:
[H3O+] = 10^(-pH)

Now, plug in the given pH value of 4.65:
[H3O+] = 10^(-4.65)

Calculating the value, you get:
[H3O+] ≈ 2.2 x 10⁻⁵ M

So, the hydronium ion concentration in the HCl solution with a pH of 4.65 is approximately 2.2 x 10⁻⁵ M.

The pOH is defined as the negative logarithm (base 10) of the hydroxide ion concentration ([OH-]).

The relationship between pOH and [OH-] is as follows:

pOH = -log[OH-]

To find [OH-], we rearrange the equation:

[OH-] = 10^(-pOH)

Given a pOH of 4.65, we can calculate the hydroxide ion concentration as follows:

[OH-] = 10^(-4.65)

[OH-] ≈ 2.2 x 10⁻⁵ M

The hydroxide ion concentration in the NH₃ solution is approximately ≈ 2.2 x 10⁻⁵ M (moles per liter)

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Answer:

we expect the reactance of the 33 mH inductor at a frequency of 6 kHz to be approximately 1.24 ohms.

Explanation:

To calculate the reactance (in ohms) of an inductor, we use the formula:

X_L = ω ∙ L

where X_L is the reactance of the inductor in ohms, ω is the angular frequency in radians per second, and L is the inductance in henries.

However, we are given the inductance in millihenries (mH), so we first need to convert it to henries:

L = 33 mH = 33 × 10^-3 H

We are also given the frequency f in kilohertz (kHz), so we can convert it to angular frequency ω using the formula:

ω = 2πf

ω = 2π × 6 kHz = 37.7 krad/s (approx.)

Now we can use the formula to calculate the reactance of the inductor:

X_L = ω ∙ L

X_L = 37.7 k rad/s × 33 × 10^-3 H

X_L = 1.24 Ω (approx.)

Therefore, we expect the reactance of the 33 mH inductor at a frequency of 6 kHz to be approximately 1.24 ohms.

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12). When you move your hand or foot, your body has converted potential energy into kinetic energy.

13). When coasting while roller skating, you eventually stop due to

friction causes kinetic energy to transfer to thermal energy.

14).  A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is Kinetic increases, potential decreases.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all examples of objects in motion that use kinetic energy.

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Answer:

Each of the joints represents a degree of freedom in the manipulator system and allows translation and rotary motion :) Hope this helps

A thing that is rotating in a circle at a uniform or constant speed is said to be in uniform circular motion. The magnitude of the velocity vector is constant, but the direction changes.

Any item moving in a circle with a constant radius always completes the circle in the same period of time. Its period refers to that period. Many people believe that there is no acceleration because the speed is constant for such a move. Any item that is modifying its velocity is said to be accelerating. Additionally, because velocity is a vector with both magnitude and direction, a change in either one of them results in a change in velocity. It is acceptable to assume that an object travelling in a circle at a constant speed is accelerating as a result of this. Because the velocity vector's direction is shifting, it is accelerating.

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It is true that in 1990 a cap-and-trade system for Sulpher dioxide was formed. Sulfur dioxide ( Sulpher dioxide ) emissions have a cap-and-trade programme thanks to the Clean Air Act Amendments of 1990.

When the U.S. Supreme Court concluded in 2007 that greenhouse gases met the definition of a "pollutant" under the Clean Air Act, five of its justices answered in the affirmative. According to the Constitution, the Supreme Court is the final judge of the legislative intent of Congress.

These six greenhouse gases are sulphur hexafluoride (SF6), hydrofluorocarbons (HFCs), methane (CH4), nitrous oxide (N2O), and perfluorocarbons (PFCs). (SF6). The "air pollution" that poses a risk to both public health and welfare is made up of these greenhouse gases in the atmosphere.

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