A group of students are playing tug-of-war. The students on both
sides of the rope are pulling with equal force so that the rope is not
moving. This is an example of?

Answer:

gravity?

Explanation:

i dont have a lot of context but this is what i thought of so...

Stars and planets form when dust and gas from space is pulled together by gravitation.

In mechanics, gravity, often known as gravitation, is the force of attraction that acts on all matter. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

In contrast, it governs the formations and evolution of stars, galaxies, and the entire cosmos by its extensive and ubiquitous action, which affects the trajectories of objects in the solar system and beyond the universe. All objects on Earth experience weight, or a gravitational pull that is proportionate to their mass and is imposed by the planet's mass.

Hence, the stars and planets form when dust and gas from space is pulled together by gravitation.

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Answer:

h = 10000 m

Explanation:

The pressure applied at a depth of the liquid is given by:

P =ρgh

where,

P = Maximum Pressure to Survive = (1000)(Atmospheric Pressure)

P = (1000)(101325 Pa) = 1.01 x 10⁸ Pa

ρ = Density of sea water = 1025 kg/m³

g = 9.8 m/s²

h = maximum depth to survive = ?

Therefore,

1.01 x 10⁸ Pa = (1025 kg/m³)(9.8 m/s²)h

h = (1.01 x 10⁸ Pa)/(1025 kg/m³)(9.8 m/s²)

h = 10000 m

At equilibrium, 2 moles of C are formed. The amounts of A and B present at equilibrium depend on the stoichiometric coefficients of the reaction and cannot be determined without further information.

To determine the amounts of A and B present at equilibrium, we need the balanced chemical equation for the reaction involving A, B, and C. Without the equation and the stoichiometric coefficients, we cannot ascertain the specific quantities of A and B.

In an equilibrium reaction, the amounts of reactants and products depend on the stoichiometry and the equilibrium constant (K) of the reaction. The equilibrium constant relates the concentrations of reactants and products at equilibrium.

The equation and the equilibrium constant would provide information on the molar ratios between A, B, and C at equilibrium. Without these details, we cannot determine the exact amounts of A and B present when 2 moles of C are formed at equilibrium.

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The average acceleration of the baseball during the throwing motion is approximately 635.2 m/s^2.

We can use the following equation to calculate the average acceleration of the ball,

a = (v_f - v_i) / t

where a is the average acceleration, v_f is the final velocity (in this case, the velocity of the ball when it is released), v_i is the initial velocity (in this case, the velocity of the ball when it is behind the pitcher's body and has not yet been thrown), and t is the time taken to throw the ball.

We know that the speed of the ball when it is released is 42 m/s, and we can assume that it starts from rest when it is behind the pitcher's body.

v_f = 42 m/s

v_i = 0 m/s

We also know that the ball is thrown through a displacement of 3.5 m, and we can estimate the time taken to throw the ball using the average speed of the throwing motion. Let's assume that the average speed of the throwing motion is half the speed of the ball when it is released, or 21 m/s. Then, the time taken to throw the ball is,

t = d / v_avg

t = 3.5 m / 21 m/s

t = 0.1667 s

Now we can plug in our values for v_f, v_i, and t to find the average acceleration,

a = (42 m/s - 0 m/s) / 0.1667 s

a = 251.99 m/s^2

The acceleration due to gravity is approximately 9.81 m/s^2, so we can add this to our previous calculation to get,

a_avg = a + g

a_avg = 251.99 m/s^2 + 9.81 m/s^2

a_avg = 635.2 m/s^2

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Answer:

False

Explanation:

The wavelength of red light is greater than blue light.  Its energy is less.

Both statements are false.    Search for a graphic of the "electromagnetic spectrum."  Many will note the wavelengths of the various regions (IR, UV, Visible, Microwave, etc.  Observe the relationships.  Red has less energy than blue.  That sounds counterintuitive, based on artist's use of red to connote fire or some energetic situation.  But the red in a fire obscures human vision to the blues and UV radiation from the same source.  A welder uses a UV shield to blocjk these wavelengths, to avoid eye damage.

Explanation:

the correct answer is the last one

The relationship between electricity and magnetism is option 4 when the solar winds have interacted.

These two are phenomena that are inter-connected to each other that generated by the electromagnetic force.

When the electric charge produced the magnetic field so it induces the movement to the electric charge that generated the electric current.

hence, the fourth option is correct.

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Answer:

La entropía del vapor de mercurio cambia en 214.235 joules por Kelvin.

Explanation:

Por definición de entropía (\(S\)), medida en joules por Kelvin, tenemos la siguiente expresión:

\(dS = \frac{\delta Q}{T}\) (1)

Donde:

\(Q\) - Ganancia de calor, en joules.

\(T\) - Temperatura del sistema, en Kelvin.

Ampliamos (1) por la definición de calor latente:

\(dS = \frac{L_{v}}{T}\cdot dm\) (1b)

Donde:

\(m\) - Masa del sistema, en kilogramos.

\(L_{v}\) - Calor latente de vaporización, en joules

Puesto que no existe cambio en la temperatura durante el proceso de vaporización, transformamos la expresión diferencial en expresión de diferencia, es decir:

\(\Delta S = \frac{\Delta m \cdot L_{v}}{T}\)

Como vemos, el cambio de la entropía asociada al cambio de fase del mercurio es directamente proporcional a la masa del sistema. Si tenemos que \(m = 0.50\,kg\),\(L_{v} = 2.7\times 10^{5}\,\frac{J}{kg}\) and \(T = 630.15\,K\), entonces el cambio de entropía es:

\(\Delta S = \frac{(0.50\,kg)\cdot \left(2.7\times 10^{5}\,\frac{J}{kg} \right)}{630.15\,K}\)

\(\Delta S = 214.235 \,\frac{J}{K}\)

La entropía del vapor de mercurio cambia en 214.235 joules por Kelvin.

King tide happens during a king tide when the moon is between the earth and the sun. When the Moon's orbit around Earth is at its first and last quarter phases, neap tides happen.

Turns it so that it is parallel to the Sun. Extremely high or extremely low tides can occur when Earth, the Moon's orbit, and the Sun line up because of the combined gravitational effect. Moderate tides occur when the Sun and the Moon are at a straight angle. Its gravitational pull causes the Earth's tides and somewhat lengthens the day as it orbits the planet at a distance of 384,400 km (238,900 mi), or about 30 times the diameter of the planet. A sidereal period of 27.3 days characterizes the Moon's orbit of the Earth.

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Answer:

If density is greater, the object sinks. Saturn is mainly composed of the lightest two gases known, hydrogen and helium. It is the only planet in our solar system whose density is less than water

Explanation:

Planet density are uneven they all have different density.

Mass per unit of volume is referred to as density. Although the Latin letter D can also be used, the sign most frequently used for density is. Mass divided by volume is how density is mathematically defined:

If density is greater, the object sinks. Saturn is mainly composed of the lightest two gases known, hydrogen and helium. It is the only planet in our solar system whose density is less than water

Planet density are uneven they all have different density.

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The efficiency of the engine is 35.7%.

Calculate the efficiency of a heat engine, we'll use the following formula:

Efficiency = (Work done by the engine / Heat absorbed) × 100

First, we need to find the work done by the engine. Work done can be calculated using the following equation:

Work done = Heat absorbed - Heat expelled

Now, let's plug in the values given in the question:

Work done = 350 J (absorbed) - 225 J (expelled) = 125 J

Next, we'll calculate the efficiency using the formula mentioned earlier:

Efficiency = (125 J / 350 J) × 100 = 35.7 %

So, 35.7% is the efficiency of the engine.

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The efficiency of the engine is 35.7%.

Calculate the efficiency of a heat engine, we'll use the following formula:

Efficiency = (Work done by the engine / Heat absorbed) × 100

First, we need to find the work done by the engine. Work done can be calculated using the following equation:

Work done = Heat absorbed - Heat expelled

Now, let's plug in the values given in the question:

Work done = 350 J (absorbed) - 225 J (expelled) = 125 J

Next, we'll calculate the efficiency using the formula mentioned earlier:

Efficiency = (125 J / 350 J) × 100 = 35.7 %

So, 35.7% is the efficiency of the engine.

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The period of one vibration of middle C, whose frequency is 256 Hz, is approximately 3.90625 milliseconds.

Frequency is the number of cycles or oscillations of a wave that occur in a unit of time, typically measured in hertz (Hz). It is a fundamental concept in physics and describes various phenomena, such as sound, light, and electromagnetic waves.

Vibration refers to a mechanical oscillation or movement of an object back and forth around a fixed point. It can be caused by various forces, such as sound waves, electrical currents, or physical impacts, and is a common phenomenon in everyday life.

According to the given information:

The period of one vibration of middle C, whose frequency is 256 Hz, is approximately 3.90625 milliseconds. This can be calculated using the formula T = 1/f, where T is the period in seconds and f is the frequency in hertz. Therefore, T = 1/256 Hz = 0.00390625 seconds = 3.90625 milliseconds.

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Answer:

Explanation: 1: The gas particles move in a straight line before colliding with something, usually the wall of their containers.

2: The is no attraction or repulsion between the gas particles.

Magma is molten rock that is below the earth's surface and retains most of its volcanic gases.

Magma is a mixture of molten rock, minerals, and gases that is located below the earth's surface. It is typically generated in the Earth's mantle, and it can move up into the crust due to geological processes like plate tectonics and volcanic activity. Magma is a high-temperature, high-pressure fluid that can be highly viscous, which means it can resist flow.

Magma is often associated with volcanic activity and can lead to the formation of volcanoes. When magma rises to the surface and is released, it is called lava. Magma can also crystallize underground, forming igneous rocks, such as granite and basalt.

Magma can contain a variety of gases, including water vapor, carbon dioxide, and sulfur dioxide. These gases can be released during volcanic eruptions and can have significant impacts on the environment and human health. For example, sulfur dioxide emissions from volcanoes can lead to acid rain and respiratory problems.

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Adding the values of all the data points and dividing by the number of data points dividing the value of each data point by the total value of all the data points multiplying the values of the highest and lowest data point, and then dividing by two subtracting the highest value among the data points from the lowest value.

A scientific model is a bodily and/or mathematical and/or conceptual representation of a system of ideas, occasions, or procedures. Scientists are seeking to perceive and recognize patterns in our world by drawing on their scientific understanding to offer motives that enable the styles to be anticipated.

Benefits of modeling and simulation :

* Can be more secure and less expensive than the real international.

* Able to test a product or device that works earlier than building it.

* Can use it to discover unexpected troubles.

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Answer:

θi = 47.7°

Explanation:

The formula for the refractive index is as follows:

\(n = \frac{Sin\theta_i}{Sin\theta_r}\)

where,

n = refractive index = 1.75

θi = angle of incidence = ?

θr = angle of refraction = 25°

Therefore,

\(1.75 = \frac{Sin\ \theta_i}{Sin\ 25^o} \\\\(1.75)(Sin\ \ 25^o) = Sin\ \theta_i\\\\\theta_i = Sin^{-1}(0.739)\)

θi = 47.7°

The resultant of the forces is 29 N. Option D

The resultant force is the force that acts in a given direction. Now we have two forces as enumerated in the question.

Thus;

Resultant = √(10)^2 + (20)^2 - [2 * 10 * 20 * cos (60 - 30))

Resultant = 29 N

Thus, the resultant of the forces is 29 N.

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Missing parts;

Two forces of magnitude 10N and 20N act on a body in directions making angles 30° and 60° respectively with x-axis what is the resultant force

A.17N

B. 19N

C. 23N

D. 29N

E. 37N​

Answer:

B

Explanation: You (with the ball in your hand)would move in the direction of the ball's initial motion. Momentum!

Answer: You would move backward.

Explanation: You would push back because you would move in the direction of the ball's initial motion.  The ball's initial motion is to come toward you, so you would most likely move backward.

Let me know if this is right! :)

Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

In an array-based heap, assuming heap entries start at index 1, the right child of node n is at index 2n + 1.

In an array-based heap where the heap entries start at index 1, the index of the right child of a node can be calculated using the formula 2n + 1, where n represents the index of the parent node. This formula ensures that the right child is located at a position one index higher than the left child. By multiplying the parent node index by 2 and adding 1, we can determine the index of the right child in the array representation of the heap.

Array-based heap: An array-based heap is a data structure used to represent a binary heap. In this representation, the elements of the heap are stored in an array. Each node in the heap has a parent-child relationship, and the index-based calculations help to efficiently navigate and manipulate the heap. The formulas for determining the indices of the left and right children are essential for maintaining the heap structure and performing operations such as insertion and deletion.

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The diffraction limit of a light microscope prevents it from distinguishing between individual atoms.

It is theoretically impossible to see an object as small as an atom with a traditional light microscope, regardless of the quality of the instrument being used. This is due to a fundamental limit on the resolution of light microscopes known as the diffraction limit.

The diffraction limit arises because light waves diffract (bend) when they encounter an obstacle or aperture, such as the lenses in a microscope. This diffraction causes the light waves to spread out and interfere with each other, creating a blurred image of the object being viewed. The resolution of a microscope is limited by the smallest distance that can be distinguished between two points in the image, which is proportional to the wavelength of the light used and the numerical aperture of the lenses in the microscope.

The wavelength of visible light is on the order of a few hundred nanometers, which is much larger than the size of an atom (which is typically on the order of picometers). This means that the diffraction limit of a light microscope prevents it from distinguishing between individual atoms, even with the highest quality lenses and most advanced techniques.

To overcome the diffraction limit and observe individual atoms, other imaging techniques such as scanning tunneling microscopy and transmission electron microscopy are used. These methods use different principles to create images with much higher resolution than is possible with a light microscope.

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The resultant velocity of the aircraft is 3015 Km/hr while the direction is 5.7 degrees North of east

The resultant  vector is that vector that has the same effect is magnitude and direction as the two vectors acting together. Recall that velocity is a vector quantity. This implies that the magnitude and the direction of the velocity is very important.

The resultant velocity would now be obtained by considering the directions of the two velocities hence we have to work geometrically and not algebraically. We have to know that the plane is flying east at 3000 km/h. If the plane encounters a cross-wind of 300 km/h that is directed to the north

Thus the resultant velocity is;

R = √(3000)^2 + (300)^2

R = √9 * 10^6 + 9 * 10^4

R = 3015 Km/hr

The direction of this resultant velocity is;

Tan-1 (300/3000)

= 5.7 degrees North of east

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Answer:

False

Explanation:

The formula of force that exists between two charges is expressed as;

F = kq1q2/r²

If two charges separated by one meter exert a 9 N force on each other, the;

9 = kq1q2/1²

9 = kq1q2 ..... 1

If the charges are pushed to a 3 meter separation, then;

F =  kq1q2/3²

F =  kq1q2/9 .... 2

Divide both equations;

9/F = (kq1q2)/ kq1q2/9

9/F =  kq1q2 * 9/ kq1q2

9/F = 9

F = 9/9

F = 1N

Hence if the charges are pushed to a 3 meter separation, then the force on EACH charge will be 1N. Hence the answer is False

Answer:

2cm/year

Explanation:

20000/10000=2cm/year

Answer:

I think about 70.

Explanation:

I hope I helped

The potential energy of the person mass 95 Kg sitting on top of a slid 3 m high is 2795.85 J

The following data were obtained from the question:

The potential energy of the person can be obtained as follow:

PE = mgh

Inputting the given parameters, we have:

= 95 × 9.81 × 3

= 2795.85 J

Thus, the  potential energy of the person is 2795.85 J

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Explanation:

Peroid-Time taken to make 1 oscillation

Frequence-Number of oscillation made in 1 second

Amplitude-The maximum distance from a tough and crust

At equilibrium, the forces exerted by the front and back hooves must be equal, but the force exerted by the front hooves will be slightly greater than that of the back hooves.

What is equilibrium?
Chemical equilibrium refers to the situation inside a chemical reaction where both the reactants are present at levels that have no further habit of changing over time, preventing any discernible change in the system's properties. Whenever the forward reaction and the reverse reaction move forward at the same speed, this condition results. The forward as well as backward reactions typically have equal, if not zero, reaction rates. The concentrations of a products and reactants do not change on a net basis as a result. Dynamic equilibrium is the name given to such a situation.

This is due to the fact that the horse's center of gravity is closer to the front hooves, and thus the front hooves must exert a greater force in order to keep the horse balanced.

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If a catcher stops a 92 mph (41. 1 m/s) pitch in his glove and slows it to rest in 0. 15 m with a force of 803 N, the ball's mass is 0.14 kg.

According to Newton's Second Law of Motion, when a force acts on a mass, acceleration (or gaining speed) occurs (object). A good illustration of this law of motion in action is when you are riding a bicycle. The mass is represented by your bicycle. The force is generated by your leg muscles as they push against the bicycle pedals.

a = (Vf²- Vi²)/2.d

The distance is 0.15 meters, the initial velocity is 92 miles per hour, or 41 m/s, and the final velocity is 0 (rest).

a= -5603 m/s²

use the second Newton law,

F= m.a

m= F/a

m= 803N/5603 m/s²

m= 0.14kg.

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