Which statement is true about the ideal mechanical advantage of a third-class lever?
A It is always greater than 1.
B It is always equal to 1.
C It is always less than 1.
D It can be less than, greater than or equal to 1.​

Answer:

D. The equator is half of a circle used to describe the northern half of the Earth.

Explanation:

hope it helps

Answer: C

Explanation: The equator divides the earth into North and South pole

Answer:

1.6404 and 2.5 because of equilibrium

Answer: Because they all share the same square root

Explanation:

h = 6.63 × 10−34 J.s = 4.136 × 10-15 eV.s

Answer:

A=12      B=36      C=1       D=36

Explanation:

Answer:10

Explanation:

In the context of the Moon model, the fraction of the Moon that was always lit up by the light is half, or 1/2.

The explanation for this is that the Moon model discussed previously most likely depicts the Moon's phases as seen from Earth. The phases of the moon are caused by distinct areas of the lit side of the moon that are visible from Earth at various times during its orbit.

The Sun always illuminates half of the Moon's surface, leaving the other side in darkness. From Earth, we can only see the bright portion; the unlit portion is invisible. Different phases result from variations in the visible fraction of the lighted half of the Moon as it revolves around the Earth.

Therefore,  the fraction of the Moon that was always lit up by the light is half, or 1/2.

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Answer:

press dat crown for meh

Explanation:

A system's internal energy is given by the heat added to the system less the work done by the system

1) 12 units of movement energy cannot by produced from 10 units of elastic energy because the additional 2 units of energy cannot be created in the closed system of the rubber band

2) Part A; The percentage efficiency = 70%

Part B; The remaining 3 units is transformed into heat and sound energy

3) The by-products of the energy transformation for a car are;

The reason for the above outcomes is as follows:

1) The first law of thermodynamics known as the law of conservation of energy states that the sum of energy within an closed or isolated system is constant and it is conserved as time progresses

Mathematically, the law can be expressed as follows;

K₁ + U₁ = K₂ + U₂

Where;

K₁ and U₁ = Initial kinetic and potential energy respectively

K₂ and U₂ = Final kinetic and potential energy respectively

The energy stored in the rubber band is given as 10 units of elastic energy. If the rubber band is taken as being in a closed system, then no additional energy is added, and we have;

U₁ = 10 units and K₁ = 0, which gives;

K₁ + U₁ = 10 units

According to the law of conservation of energy, we get;

10 units = K₁ + U₁  = K₂ + U₂

Therefore, the sum of the final kinetic and potential energy is 10 units and the energy can only be transferred from kinetic to potential (internal) energy, such that the maximum kinetic, movement, energy obtainable is 10 units and 12 units of movement energy cannot be produced

2) The given parameter:

Initial amount of elastic energy = 10 units

The amount of movement energy produced = 7 units

\(Efficiency = \mathbf{\dfrac{Useful \ energy \ produced}{Total \ energy \ stored} \times 100}\)

\(\mathbf{Efficiency \ of \ the \ rubber \ band, \, \eta }= \dfrac{Movement \ energy \ produced}{Elastic \ energy \ stored} \times 100\)

Therefore;

\(\mathbf{\eta = \dfrac{7}{10} \times 100} = 70 \%\)

The percentage efficiency of the rubber band, η = 70%

Part B

The remaining 3 units of energy is transformed into other energy forms including heat and sound energy

3) A by-product is a secondary product, produced in addition to a main or primary product.

In the energy transformations of a car, the main product of the energy transformation is the movement energy of the car

The by-product of the energy transformation in a car includes;

Heat energy; The temperature of the engine of the car rises

Sound energy; The engine sound

Chemical energy; The formation of new chemicals during the combustion process

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The example of matter in the three states is brick in solid state, water in liquid state and oxygen gas in gaseous state.

1. Solid: A brick is a solid object that maintains a fixed shape and volume.

2. Liquid: A glass of water is a liquid that conforms to the shape of its container but maintains a definite volume.

3. Gas: Oxygen gas in the atmosphere is a gas that does not have a fixed shape or volume, filling the available space.

The three states of matter are solid, liquid, and gas. Solids have a fixed shape and volume, such as an ice cube. Liquids have a definite volume but take the shape of their container, like water. Gases have neither a fixed shape nor volume and fill the entire space available to them, such as the air we breathe.

In summary, the states of matter describe the physical properties of substances based on the arrangement and movement of their particles, with solids having a fixed shape, liquids taking the shape of their container, and gases being free-flowing and filling all available space.

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Solid: An object that keeps a constant shape and volume is a brick.

Thus, Liquid: A glass of water is a liquid that keeps a consistent volume while taking on the shape of its container. Gas: Oxygen gas fills the available space in the atmosphere and does not have a defined shape or volume.

Gas, liquid, and solid matter can exist in any combination. Solids, like an ice cube, have a set shape and volume.

Like water, liquids have a set capacity but adopt the shape of their container. Gases, like the air we breathe, have neither a set shape nor volume and fill all available space.

Thus, Solid: An object that keeps a constant shape and volume is a brick.

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Answer:

heat

Explanation:

Answer:

motion heat

Explanation:

False, there are also artificial satellites.

Answer:

False

Explanation:

There are also artificial types of satellites in the orbit

PLS MARK BRAINLIEST

One component of my school's recycling system that could be automated is the sorting of recyclables. Currently, the school relies on students and staff to sort recyclables into the appropriate bins, which can be time-consuming and may result in contamination if materials are not sorted properly.

Automating the sorting process with a machine or conveyor belt system could improve the efficiency and accuracy of the recycling system. It could also potentially reduce labor costs associated with manual sorting.

The economic impact of automating the sorting process would depend on the initial cost of the equipment and any associated installation or maintenance costs. However, over time, the improved efficiency and accuracy of the system could result in cost savings for the school. Additionally, the increased efficiency of the system could potentially lead to increased recycling rates, which could result in cost savings for waste disposal and potentially generate revenue through the sale of recycled materials.

Answer:

Our school has color coded virtual trash cans. For example, a trash can for only paper will only accept paper items, if the item put inside is not paper, it will litter it out and all students have cleaning duties throughout the week so even if you or someone litters you’ll probably have to clean it up at some point anyways. I honestly think it’s very cool. (i wish this was true smh).

Answer:

light waves slow down in water.

Explanation:

light can reflect off of different surfaces, and in water they slow down.

for example, in a completely black room, the light cannot bounce/reflect off of the walls, that's why it is so dark.

hope this helps!

The Light travels faster in air than it travels in water.

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Answer:

I believe it is luminosity and distance

Explanation:

So B

Answer:

Hope this helps

Explanation:

As we know our atmosphere or air have different levels. Every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

1. The kinetic energy of the bottle is 1 Kg.m²/s²

2. The kinetic energy of the bottle is 2 Kg.m²/s²

3. The kinetic energy of the bottle is 3 Kg.m²/s²

4. The kinetic energy of the bottle is 40 Kg.m²/s²

The kinetic energy can be obtain as illustrated below:

1. For mass 0.125 Kg

KE = ½mv²

KE = ½ × 0.125 × 4²

Kinetic energy = 1 Kg.m²/s²

2. For mass 0.250 Kg

KE = ½mv²

KE = ½ × 0.250 × 4²

Kinetic energy = 2 Kg.m²/s²

3. For mass 0.375 Kg

KE = ½mv²

KE = ½ × 0.375 × 4²

Kinetic energy = 3 Kg.m²/s²

4. For mass 0.500 Kg

KE = ½mv²

KE = ½ × 0.500 × 4²

Kinetic energy = 40 Kg.m²/s²

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The change in kinetic energies are 1 \(kg m^{2}/s^{2}\), 2 \(kg m^{2}/s^{2}\), 3 \(kg m^{2}/s^{2}\), and 4 \(kg m^{2}/s^{2}\) respectively as the mass of the bottle is changed as 0.125kg,  0.250kg, 0.375kg, and 0.500kg.

Given the velocity v=4m/s.

KE=\(1/2 mv^{2}\)
Here KE represents the Kinetic energy of the bottle, m represents the mass of the bottle which is varying time to time, and v represents the velocity of the bottle which is constant over time.
For the first case:
Given mass m=0.125kg
∴KE=\(1/2mv^{2}\)
     =1/2*(0.125)*(4)²
     =1 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.125kg is 1 kg m²/s².

For the second case:
Given mass m=0.250kg
∴KE=\(1/2mv^{2}\)
     =1/2*(0.250)*(4)²
     =2 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.250kg is 2 kg m²/s².

For the third case:
Given mass m=0.375kg
∴KE=\(1/2mv^{2}\)
     =1/2*(0.375)*(4)²
     =3 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.375kg is 3 kg m²/s².

For the final case:
Given mass m=0.500kg
∴KE=\(1/2mv^{2}\)
     =1/2*(0.500)*(4)²
    =4 \(kg m^{2}/s^{2}\)
Hence the change in kinetic energy of the bottle when it became 0.500kg is 4 kg m²/s².

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Answer:

C. Beats

Explanation:

When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.

Answer:

beats

Explanation:

got it right

Answer:

The Holographic Principle, proposed by physicist Gerard 't Hooft and further developed by Juan Maldacena, is a fascinating concept in theoretical physics that has sparked significant interest and research. In the context of the AdS/CFT correspondence, it suggests that a gravitational theory in a higher-dimensional space can be mathematically equivalent to a quantum field theory in a lower-dimensional space.

At the heart of the Holographic Principle is the idea that the information and dynamics of a higher-dimensional theory can be fully captured by its boundary, implying that the entire bulk can be "holographically" encoded on the boundary. This concept challenges our conventional understanding of the relationship between space, gravity, and quantum mechanics.

The holographic duality proposed by Maldacena specifically relates a gravitational theory in Anti-de Sitter space (AdS) with a conformal field theory (CFT) in one fewer dimension. In this correspondence, the gravitational theory describes a curved space-time with gravity, while the CFT is a quantum field theory without gravity but living on the boundary of the AdS space. The holographic duality suggests that the two theories are mathematically equivalent and provide equivalent descriptions of the same physical phenomena.

The mathematical foundations of the AdS/CFT correspondence involve advanced concepts from string theory and quantum field theory. String theory postulates that fundamental particles are not point-like entities but rather tiny vibrating strings. By considering these strings propagating in a higher-dimensional space, theorists discovered that they naturally give rise to gravity. The holographic duality emerged as a surprising consequence of studying string theory in the AdS space.

The implications of the Holographic Principle are profound. First and foremost, it suggests a deep connection between gravity and quantum mechanics, two fundamental pillars of modern physics that have been notoriously difficult to reconcile. The holographic duality provides a framework to study strongly interacting quantum systems in terms of gravity, enabling insights into the nature of black holes, the behavior of matter in extreme conditions, and other phenomena that are challenging to analyze using traditional methods.

The Holographic Principle also has potential implications for our understanding of black holes. It proposes that the information that falls into a black hole is not destroyed, as suggested by the Hawking radiation phenomenon, but rather encoded on its event horizon. This idea, known as the "holographic encoding of information," has stirred intense debates and ongoing research in the field of black hole information paradox.

Furthermore, the Holographic Principle challenges our traditional notions of spacetime. It suggests that spacetime, as we perceive it, might emerge as an approximation or an emergent property from a more fundamental description involving quantum information. This notion aligns with the concept of "entanglement entropy," which measures the entanglement between quantum states and has been linked to the geometry of spacetime.

The potential revolutionary impact of the Holographic Principle lies in its potential to provide a unified framework for understanding quantum gravity and resolving long-standing mysteries in theoretical physics. It opens new avenues for studying the nature of black holes, the behavior of matter in extreme conditions, and the fundamental structure of the universe. However, it is important to note that the Holographic Principle is still an area of active research, and many aspects of its implications and applications continue to be explored and refined by physicists.

selection bias is one of them, i can't tell which words in the options go together though

Answer: In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing

Answer: NICE that is a fun fact and nice 1 day answer streak

Explanation:

Answer:

yes indeed that's the fun fact for day one answer streak.

Explanation:

Have a good rest of your day! :)

C segment of the graph shows that the car is slowing down.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

In the given graph, Velocity of varying with time. When the car is slowing down, the slope of the graph is negative in this region.

According to figure: segment C and segment E has negative slope.   Hence, according to the option: C segment of the graph shows that the car is slowing down.

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Answer: 2m/s

Explanation:

The acceleration of the wake boarder is equal to 2 m/s².

Acceleration of a body can be described as the change in velocity of a body with respect to time. The acceleration is a vector parameter posses both magnitude and direction. Acceleration is described as as the second derivative of position w.r.t. time and the first derivative of the velocity of an object w.r.t. time.

According to Newton's 2nd law of motion, the force (F) acting is equal to the product of the mass and acceleration (a).

F = ma

or,   a = F/m

Therefore, acceleration (a) is inversely proportional to the mass (m).

Given, the force with which the boat pulled wake boarder, F = 124 N

The mass of the wake boarder = 62 Kg

The acceleration of the wake boarder, a = 124/62 = 2 m/s²

Therefore, the acceleration of the wake boarder is 2 m/s².

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Answer:

dividing speed by wavelength

Explanation;

frequency=speed:wavelenght

Answer:

A- Dividing speed by wavelength

Explanation:

Just took the test

Answer:

vf = 27.4 [m/s]

Explanation:

Para poder simplificar tiene que identificar las unidades que tiene en la ecuacion:

0.08 [m/s²] = aceleracion

180 [s] = tiempo

13 [m/s] = velocidad

al multiplicar aceleracion por tiempo podemos obtener velocidad ya que el tiempo se elimina con segundos al cuadrado

\([\frac{m}{s^{2} } ]*[s] = [\frac{m}{s} ]\)

vf = 13 + (0.08*180)

vf = 13 + 14.4

vf = 27.4 [m/s]

Answer:

27.4

Explanation:

Answer: D

Explanation: Its a type of white blood cell that moves by amoeboid

Answer:

M = F × d

I hope it will be helpful for you.

Answer:

moment=force x perp. distance from the pivot

unit= Nm