Which statement describes all solids?

\(\boxed{\sf Efficiency=\dfrac{E}{∆E}\times 100}\)

\(\\ \sf\longmapsto Efficiency=\dfrac{1200}{2000}\times 100\)

\(\\ \sf\longmapsto Efficiency=\dfrac{3}{5}\times 100\)

\(\\ \sf\longmapsto Efficiency=60\%\)

Answer:

B: The colors of light emitted from heated atoms had very specific energies.

Explanation:

B: The colors of light emitted from heated atoms had very specific energies.

The frequency of energy level transition is 2.34 x 10¹⁴ Hz with wavelength of 1.28 x 10‾⁶ m

From Niels Bohr atom model, the electron will orbit according to its energy level. The energy level of electron can be defined as

En = (-13,6/n²) eV

where En is energy level, n is number of state.

From the question above, we know that:

n2 = 3

n1 = 5

Hence, the energy of transition is

ΔE = E3 - E5

ΔE =  -13,6(1/3²-1/5²) eV

ΔE =  -13,6(1/3²-1/5²) eV

ΔE = -0.967 eV

The frequency and wavelength can be determined as

E = h . f = h . c . λ

where h = 4.1357 × 10‾¹⁵ eVs

c = 3 x 10⁸ m/s

Then we can find the frequency of transition energy

h . f  = -0.967 eV

4.1357 × 10‾¹⁵ eVs = -0.967 eV

f = 2.34 x 10¹⁴ Hz

and the wavelenth is

λ = c / f

λ =( 3 x 10⁸ )/( 2.34 x 10¹⁴)

λ = 1.28 x 10‾⁶ m

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Answer:

a) 16m/s b) 192m

Explanation:

v1=32m/s a=-2m/s^2 t=8s v2=? d=??

a) I will use this equation v2= v1 + a*t

v2= 32m/s + -2m/s^2 * 8s

v2= 32m/s + -16m/s

v2= 16m/s

b) v2^2=v1^2 + 2ad

rearranging

v2^2-v1^2=2ad

v2^2-v1^2/2= a d

v2^2-v1^2/2a=d

16m/s^2 - 32m/s^2/ 2 x-2m/s^2 =d

d=192m

S.E.A.L Certified Answer ↓↓↓

FALSE...

Explanation:

Once the box hits the water, the forces are balanced (50 N down and 50 N up). However, an object in motion (such as the box) will continue in motion at the same speed and in the same direction. When the box strikes the water, it stops accelerating; yet it does not stop moving

Because:

Once the object hits the water, the forces are balanced and the object will stop. Support your answer with reasoning.

BRAINLIEST PLS... :)

Answer:

Explanation:

ok it's correct

Water molecules may adhere to itself and to other molecules because of the existence of hydrogen bonds.

A hydrogen bond is a weak electrostatic attraction between a partly positive hydrogen atom in one molecule and a partially negative atom in another (typically oxygen or nitrogen). Each molecule of water comprises two hydrogen atoms and one oxygen atom. The oxygen atom is somewhat negatively charged, while the hydrogen atom is partially positively charged.

When two water molecules come into contact with one other, the partly negative oxygen atom of one water molecule is attracted to the partially positive hydrogen atoms of the other water molecule, resulting in the formation of a hydrogen bond. Water molecules stay together due to hydrogen bonding, giving water its distinctive features such as high surface tension and cohesiveness.

Water can also cling to other molecules with partial charges, such as polar compounds such as salt or sugar. A water molecule's partly negative oxygen atom can attract positively charged sodium or sugar molecules, forming a connection between them.

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Answer: The force of gravity

Answer:

Confucius believe that kings should behave RIGHTLY

Explanation:

CONFUCIUS  believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics )  of the land and also live a right and just life.

Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership

Answer:

CONFUCIUS  believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics )  of the land and also live a right and just life.

Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership

Explanation:

As an AI language model, I do not condone or promote drug use or abuse. However, I can provide an objective answer to your question based on scientific and medical information. Narcotics are a class of drugs that are derived from opium or synthetic opioids.

They are powerful painkillers and are used for medical purposes to alleviate severe pain. The most important characteristic of narcotics is their ability to affect the central nervous system and produce feelings of euphoria, relaxation, and sedation. This is why they are often abused and can lead to addiction. Narcotics are also highly addictive and can cause physical and psychological dependence.

Long-term use can lead to tolerance, which means that higher doses are needed to achieve the same effects. Overdose of narcotics can lead to respiratory depression, coma, and death. Therefore, it is important to use narcotics only under the supervision of a licensed healthcare provider and to follow the prescribed dosage. Misuse of narcotics can have serious consequences, both for the individual and society.

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Narcotics are a class of drugs that are derived from opium or synthetic opioids.

They are powerful painkillers and are used for medical purposes to alleviate severe pain. The most important characteristic of narcotics is their ability to affect the central nervous system and produce feelings of euphoria, relaxation, and sedation. This is why they are often abused and can lead to addiction. Narcotics are also highly addictive and can cause physical and psychological dependence.

Long-term use can lead to tolerance, which means that higher doses are needed to achieve the same effects. Overdose of narcotics can lead to respiratory depression, coma, and death. Therefore, it is important to use narcotics only under the supervision of a licensed healthcare provider and to follow the prescribed dosage. Misuse of narcotics can have serious consequences, both for the individual and society.

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Answer:

eye ,mouth,and,ears face

Answer:

knee, elbow, and wrist

Explanation:

There is a vector a with a magnitude of 5 units pointing toward the west and a vector B with a magnitude of 3 units pointing toward the south. Using vector addition, the magnitude of the resultant vector would be 5.83 units.

The quantities that contain the magnitude of the quantities along with the direction are known as the vector quantities.

While the scalar quantities do not contain the information of the direction they only have a magnitude of the quantity measured.

As given in the problem vector a with a magnitude of 5 units pointing toward the west and a vector B with a magnitude of 3 units pointing toward the south.

By using the triangle law for the vector addition,

Resultant = √(3² + 5²)

                 = 5.83 units

Thus, the magnitude of the resultant vector would be 5.83 units.

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By using mass to count large numbers of objects, you can obtain accurate results quickly and with minimal error. Additionally, this method can be automated using a particle counter, which automates the process of counting particles based on their size and/or mass.

This method is particularly useful when counting small or very similar objects, such as cells or beads. The process involves the following steps:

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Answer:

4500 N

Explanation:

F = ma

   = 1500 kg * 3 m/s^2 = 4500 N

edited to correct units !

Let , radius of sphere 1 is r .

So , radius of sphere 2 is 6r .

Surface area of sphere is given by :

\(A=4\pi r^2\)

So ,

\(\dfrac{A_2}{A_1}=\dfrac{4\pi(6r)^2}{4\pi r^2}\\\\\dfrac{A_2}{A_1}=36\)

Volume is given by :

\(V=\dfrac{4}{3}\pi r^3\)

Ratio of sphere 2 by sphere 1 is given by :

\(\dfrac{V_2}{V_1}=\dfrac{\dfrac{4}{3}\pi (6r)^3}{\dfrac{4}{3}\pi r^3}\\\\\dfrac{V_2}{V_1}=216\)

Therefore ,  the ratio of area and volume is 36 and 216 respectively .

Hence , this is the required solution .

Answer:

False

Explanation:

The order from superficial to deep is: 1) Integumentary system, 2)Superficial cortical bone, 3) Deep cortical bone, 4) Trabecular bone, 5) Periosteal layer of dura mater, 6) Meningeal layer of dura mater, 7) Arachnoid mater 8) Pia mater.

The order from superficial to deep reflects the layers and structures in the given list. The integumentary system, which includes the skin, is the outermost layer. Moving deeper, we encounter the superficial cortical bone, which is the outer layer of compact bone. Beneath that is the deep cortical bone, another layer of compact bone. Trabecular bone follows, which is a spongy bone with a lattice-like structure.

Continuing deeper, we find the periosteal layer of the dura mater, which is the outermost layer of the protective covering of the brain. Next is the meningeal layer of the dura mater, which lies beneath the periosteal layer. Further inward is the arachnoid mater, a middle layer of the meninges. Finally, we reach the pia mater, the innermost layer that adheres to the brain's surface.

This order reflects the progression from outermost structures to deeper structures within the given list.

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Complete question is:

place the items in order from superficial to deep. Question Image is attached.

Ordering items from superficial to deep is a concept used in various scientific fields. In geology, the Earth's crust is divided into layers such as the lithosphere, asthenosphere, and mesosphere. In oceanography, the surface zone, thermocline, and deep zone represent different depths of the ocean. Similarly, in biology, the epipelagic, mesopelagic, bathypelagic, and abyssopelagic zones represent increasing depths in the ocean

Ordering items from superficial to deep is a concept commonly used in various scientific fields. Let's take a look at a few examples:

These are just a few examples of how we can order items from superficial to deep in different scientific contexts. Understanding these orders helps us gain a better understanding of the structures and compositions of various systems.

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Answer:

2=6

3=9

Explanation:

I think this is right I'm not sure but I have done problems like this and did based on what I remember.

The average acceleration of the 3 kg block is 4 m/s².

The given parameters;

According to Newton's third law of motion, action and reaction are equal and opposite.

The force exerted on both blocks are equal and opposite.

\(F = ma\\\\m_1 a_1 = m_2a_2\\\\a_2 = \frac{m_1 a_1}{m_2}\\\\a _2 = \frac{2\times 6}{3} \\\\a_2 = 4 \ m/s^2\)

Thus, the average acceleration of the 3 kg block is 4 m/s².

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The distance between Earth and the Sun is often expressed as 1 astronomical unit (au). Using this unit, let's find the distance between the Sun and Mars, which has a period of approximately 686 Earth days. As Mars is further away from the Sun than the Earth, it's going to be more than 1 AU away.

However, it is less than twice the distance of Earth from the Sun. Therefore, Mars' average distance from the Sun is around 1.5 AU. main answer: The distance between the Sun and Mars is around 1.5 astronomical units (au).explanation: An astronomical unit (AU) is the average distance between the Earth and the Sun. It is approximately 93 million miles (150 million kilometers) long. Mars has an orbital period of around 686 Earth days, or 1.88 Earth years. Since Mars' orbit is slightly elliptical, its distance from the Sun varies somewhat throughout its orbit.

However, we may find the distance between Mars and the Sun's average distance by taking the ratio of Mars' orbital period to Earth's, which is one year, or 365.25 days. By multiplying one astronomical unit by 1.52, we arrive at a distance of around 1.5 astronomical units (au) as the average distance between the Sun and Mars.

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The bungee jumper's acceleration is zero when she achieves her top speed. This is due to the fact that acceleration is the rate at which velocity changes, and since velocity is constant at maximum speed, there is neither change nor acceleration.

This is evident because when the bungee cord is completely stretched, the upward force is at its strongest. Within 2.4 seconds, or in the midst of the second free-fall phase, the jumper arrived at the highest position. Around -9.8 m/s2 of downward acceleration is present.

The elastic force from the bungee cord pushing up against the jumper as it expands slows his descent and temporarily stops him.

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Centripetal acceleration ac is the acceleration experienced while in uniform circular motion. It always points toward the center of rotation. It is perpendicular to the linear velocity (tangential speed) v and has the magnitude:

\(a_c = \dfrac{v^2}{R}\)

Solving for v:

\(v = \sqrt{a_c R} = \sqrt{(250\;m/s^2)(0.50\;m)} = 5\sqrt{5}\;m/s \approx 11.18\;m/s\)

The yo-yo’s tangential speed 11.18 m/sec.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

Centripetal acceleration ac is the acceleration experienced while in uniform circular motion. It always points toward the center of rotation. It is perpendicular to the linear velocity (tangential speed) v and has the magnitude:

\(a_{c} = v^2/r\)

Solving for v

\(v = \sqrt{a_{c}r }\) = 11.18 m/sec

The yo-yo’s tangential speed 11.18 m/sec.

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Answer:

19pr

Explanation:

Voluntary public appearance, despite an aversion to social excitement, was a paradoxical aspect of spencer’s behavior. Thus, D is the correct option.

The "national virtue" Spencer had assaulted while his banquet speech was U.S. residents' tendency to devote a large sum of time to pursuing a livelihood.

A researcher applying Watts's mathematical models as described in the passage to research the transmission of an airborne contagious disease can most reasonably assume that a small number of individuals could cause a widespread distribution of the disease.

It can be reasonably inferred that the intelligentsia accepted Milgram's theory because it appealed to their imaginations based on the passage.

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The correct question is:

What could be interpreted as a paradoxical aspect of Spencer's behavior was his:

A. obvious affluence, despite an explicit disdain for wealth.

B. fervent belief in capitalism, despite evolutionary evidence against its merits.

C. apparent sense of inferiority, despite glowing praise from his followers.

D. voluntary public appearance, despite an aversion to social excitement.

the average speed of the rabbit is 29 m/s. The is found by using the formula for average speed, which is distance are the mainly divided by time v avg = d / t  In this are of case, the distance is 32 meters and the time are  1.1 seconds vavg = 32 m / 1.1 s

Solving for vavg gives us vavg = 29.09 m/s Since we need to express the answer to two significant figures, we round this to 29 m/s. Finally, we include the appropriate units, which are meters per second (m/s).

the average speed of the rabbit that runs a distance of 32 m in a time of 1.1 s is 29 m/s. To find the average speed of a rabbit that runs a distance of 32 m in a time of 1.1 s, you can use the formula for average speed: v_avg = distance/time. v_avg = 32 m / 1.1 s Plug in the given values for distance (32 m) and time (1.1 s) into the . Divide 32 m by 1.1 s.  v_avg ≈ 29.09 m/s (not rounded yet)  Round to two significant figures  v_avg ≈ 29 m/s.

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Answer: when water flows on the earths surface

Explanation:

Energy is defined in science as the ability to move matter or change matter in some other way.

When thermal energy is removed from particles, then the particles' kinetic energy decreases (Option D).

The expression particles' kinetic energy makes reference to the amount of motion energy (i.e. energy in movement) that contain the particles of an object, which depends on the temperature of the material.

In conclusion, when thermal energy is removed from particles, then the particles' kinetic energy decreases (Option D).

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