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An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?

A. small crystals
B. cooled quickly
C. produced from magma
D. formed at Earth’s surface

Mass,m = 12 kg

Force,F = 3.2 N

Calculate the acceleration ( a ) .

We know that,

\( \bf \: Force = Mass × Acceleration \)

\( \sf\implies \: 3.2 = 12 \: \times a\)

\( \sf \implies \: a = \dfrac{3.2}{12} \)

\( \sf \implies \: a = \dfrac{32}{12 \times 10} \)

\( \sf \implies \: a \: = \dfrac{8}{3 0} \)

\( \sf \implies \: a = 0.266\)

\( \sf \implies \: a = 0.27 \: m {s}^{ - 2} \: (approx)\)

We are given with the amount of force applied and mass of a cart and we have to find the acceleration of the box.

According to Netwon's 2nd law,

After deriving, we will get that

Plugging the given values to get mass,

➝ 3.2 N = 12 kg × accleration

➝ Accleration = 3.2 / 12 m/s²

➝ Accleration = 0.27 m/s² (approx.)

Thus, the required answer is Option A.

Carry On Learning \(!\)

The potential energy  and kinetic energy of the bowling ball are 2,205 J and 37.5 J respectively.

The bowling ball at the given position and speed possess gravitational potential energy and kinetic energy.

The potential energy  and kinetic energy of the bowling ball is calculated as follows;

P.E = mgh

where;

P.E =  (3 x 9.8 x 75 )

P.E = 2,205 J

The kinetic energy of the bowling ball is calculated as;

K.E = ¹/₂ mv²

where;

K.E = ¹/₂ ( 3 ) x (5²)

K.E = 37.5 J

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The magnitude of the horizontal component of the force that the floor exerts on the block is 39 N.

The greatness of the flat part of the power that the floor applies on the block is equivalent in extent and inverse in course to the power that the block applies on the floor because of Newton's third regulation.

At the point when a power of 39 N is applied to the block, the block will start to move toward the applied power. As the block moves, it applies an equivalent and inverse power on the floor, causing a response force that demonstrations the other way of the block's movement. The level part of this response force is equivalent in greatness to the power applied to the block and acts the other way, which is 39 N. Consequently, the size of the flat part of the power that the floor applies on the block is 39 N.

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Answer:

2

Explanation:

To find force it's force = mass times acceleration so to find mass you would divide force by acceleration

Answer:

C. Wedge

Explanation:

Answer:

GIVE THE PERSON ABOVE BRAINLIEST UwU

Explanation:

Answer:

answer to this question is c

Answer:

3

Explanation:

because the battery's power is not functioning well

Answer:

the most important effect of the gravitational force is the change in the tide.

Explanation:

The gravitational force between the Moon and the Earth is given by

        F = G m M / r2

where m is the mass of the Moon, M the mass of the Earth, and r the distance between the two.

The magnitude that changes in this formula is the distance between the Moon and the Earth, due to the lunar rotation, at the points of maximum approach in the periods of high tide and in the periods of greater distance the tide is low.

It should be mentioned that the earth's crust is also affected, but its movement is much less than that of water, which is why in almost all cases it is taken as fixed.

Lately it has also been analyzed that the Earth-Moon structure creates greater stability in the rotation of the two bodies.

Consequently the most important effect of the gravitational force is the change in the tide.

Answer:CO2: In this molecule, carbon has 4 valence electrons and each oxygen has 6 valence electrons. Carbon forms double bonds with both oxygen atoms, resulting in 2 electron groups around the carbon atom. Therefore, the hybridization of carbon in CO2 is sp.

BF₃ (boron trifluoride) has sp² hybridization of the central atom.

In the Lewis structure of BF₃, boron is surrounded by three fluorine atoms, and it does not have any lone pairs of electrons. Boron has an electronic configuration of 1s² 2s² 2p¹, with one unpaired electron in the 2p orbital.

During hybridization, one of the 2s electrons of boron is promoted to the empty 2p orbital, resulting in the formation of three hybrid orbitals. These three hybrid orbitals are known as sp² hybrid orbitals. The three hybrid orbitals are formed by the combination of one 2s orbital and two 2p orbitals.

The sp² hybrid orbitals of boron are oriented in a trigonal planar arrangement, with an angle of 120 degrees between each orbital. The three fluorine atoms then bond with the three sp² hybrid orbitals of boron through sigma bonds, resulting in a trigonal planar molecular geometry.

The remaining p orbital of boron, which was not involved in hybridization, is perpendicular to the plane of the molecule. This p orbital contains the unhybridized electron, which can participate in pi bonding with other atoms or molecules.

Overall, the sp2² hybridization of boron in BF₃ allows for the formation of three sigma bonds with the surrounding fluorine atoms, resulting in a trigonal planar shape for the molecule.

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The question is incomplete, the complete question is:

Of the following, only ________ has sp2 hybridization of the central atom.

A) ICl₃  B) PBr₃  C) HCN  D) BF₃

True, The blue line (radius) is perpendicular to the green line (chord).

Perpendicular lines are lines that intersect at a right (90 degrees) angle. This lines are often normal to another line. So a perpendicular line at an angle of 90° to a given line, plane, or surface.

From the given diagram, the blue line (radius) is normal to the green chord.

That is the blue line cuts the green line at 90 degrees, so both lines are perpendicular to each other because the angle between them is 90 degrees.

Thus, we can conclude that the given statement about the blue line (radius) and the green line (chord) is TRUE.

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Answer: False

Explanation:

I just took the quiz and the answer was false for the numbers 7.1 and 7.3

If, after focusing in low power, you need to use only the fine adjustment to focus the specimen at higher powers, the microscope is said to be parfocal.

When a microscope is said to be parfocal, it means that once you have achieved a sharp focus on the specimen using the low-power objective lens, you can switch to a higher-power objective lens and only need to use the fine adjustment knob to fine-tune the focus. The concept of parfocality is based on the principle of maintaining the relative distance between the objective lens and the specimen when switching between different magnifications.

In a parfocal microscope, the optical system is designed in such a way that the focal point of each objective lens is nearly the same. This means that when you switch from a lower-power objective to a higher-power one, the focal plane of the specimen remains relatively unchanged. As a result, the specimen will still be relatively in focus, requiring only minor adjustments using the fine adjustment knob to achieve a clear image.

The advantage of a parfocal microscope is that it saves time and effort in refocusing the specimen each time you change the objective lens. Without the parfocal feature, you would need to use the coarse adjustment knob extensively to reestablish focus, which can be time-consuming and increase the risk of losing the specimen's position.

It is important to note that while parfocality simplifies the process of switching between objective lenses, fine adjustments are still necessary to achieve the sharpest focus when moving to higher magnifications. The fine adjustment knob allows for precise control and minor corrections to obtain optimal clarity and detail in the specimen at higher magnifications.

Therefore, the correct answer is parfocal.

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Answer:

The Sunflower, and the tree

Explanation:

they consume carbon dioxide, and produce oxygen.

The equation that describes the graph is y = 16.7x + 150.

We have been given the graph of a certain function data set in physics. We know that the graph is the representation of data on cartesian coordinates. In this case, we are asked to find the equation of the graph in the form; y=mx+b

m = slope of the graph

b = intercept of the graph.

To obtain the slope;

m = y2 - y1/ x2 - x1

m = 400 - 200/ 16 - 4

m = 200/ 12

m = 16.7

Then we can see from the graph that the y - intercept is 150. Having these data, the equation that could describe the graph is now;

y = 16.7x + 150

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Answer:

Density= 2.78 g/cm³

Relative density=2.8

Explanation:

To calculate the density of the cube we have to use the formula ρ=mass/volume

ρ stands for density.

So now we don't have the volume of the cube and to find the volume of the cube we have to use the formula a³

3³= 9 cm³

Now plug in the values. ρ= 25 g/9 cm³

ρ= 2.78 g/cm³

To find the relative density, we have to use the formula ρsample/ρH20

The sample means the density of the substance earlier. We do not know the density of water but it is constant at 997 kg/m³.

Now we have to make the units same so you change the unit of the density of cube to kg/m³

So, 25/1000= 0.025 kg

9/100×100×100 (because cm³ which means that there should be 3 meters to change the unit and to conver cm to meter we need to divide by 100 so 9cm/100, 9cm²/100×100, 9cm³/100×100×100)

=0.000009 m³

The new density= 0.025 kg/ 0.000009 m³

= 2777.78 kg/m³

Now plug the values into the formula:

relative density= 2.777.78 kg/m³ / 997 kg/m³

=2.8

There is no unit since kg/m³ and kg/m³ cancels

Answer:

Mercurio

Masa

3,285 × 10^23 kg

Mercurio está a una distancia promedio de 48 millones de millas (77 millones de kilómetros) de la Tierra.

Venus

Masa

4.867 × 10^24kg

En su punto más cercano a la Tierra, Venus está a unos 61 millones de kilómetros (38 millones de millas) de distancia.

tierra

Masa

5.972 × 10^24kg

Marte

Masa

6,39 × 10^23 kg

La distancia mínima de la Tierra a Marte es de unos 54,6 millones de kilómetros (33,9 millones de millas).

Júpiter

Masa

1.898 × 10^27kg

Debido a que ambos planetas viajan en una trayectoria elíptica alrededor del sol, la distancia de Júpiter a la Tierra cambia constantemente. Cuando los dos planetas están en su punto más cercano, la distancia a Júpiter es de solo 365 millones de millas (588 millones de kilómetros).

Saturno

Masa

5.683 × 10^26kg

Su distancia más cercana a la Tierra es de aproximadamente 1.200 millones de kilómetros (746 millones de millas)

Urano

Masa

8.681 × 10^25kg

la distancia entre la Tierra y Urano cambia diariamente. Lo más cerca que están los dos es 1.600 millones de millas (2.600 millones de kilómetros).

Neptuno

Masa

1.024 × 10^26kg

Cuando Neptuno y la Tierra se alinean en el mismo lado del sol, en su punto más cercano, están a solo 2,700 millones de millas (4,300 millones de kilómetros)

masa de Plutón =

1.30900 × 10^22 kilogramos

Plutón se encuentra a 4670 millones de millas (7500 millones de kilómetros) de la Tierra. En su punto más cercano, los dos están a solo 2660 millones de millas (4280 millones de km) de distancia.

The  safely removing a needle from a syringe based on safe sharps work practices is to use a needle box equipped with a needle removal device that permits the needle to fall directly into the needle box or sharps container when removed.

This method ensures that the needle is immediately disposed of in a safe manner, reducing the risk of accidental needlestick injuries. It is important to never remove the needle by twisting off the syringe directly by hand, as this can cause the needle to become dislodged and potentially cause harm. Similarly, asking a colleague to hold the syringe while you twist the needle off by hand also poses a risk. Recapping the needle with forceps before removing it by hand is also not recommended, as it increases the risk of needlestick injuries. Therefore, using a needle box equipped with a needle removal device is the safest and most effective method for removing a needle from a syringe.

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Answer:

D. if it is dark, then an owl will find a mouse by the sound the mouse makes

The spectrum observed from the Sun (or any star) would exhibit an absorption spectrum. This is because the outer gaseous atmosphere of the star absorbs specific wavelengths of light, resulting in dark absorption lines in the spectrum.

In the cooler, lower-density outer atmosphere, where white light from the star travels, some atoms or molecules in the atmosphere absorb photons with particular energy. In the spectrum, these absorptions show up as black lines at specific wavelengths. The specific set of absorption lines that each element or molecule generates results in a distinctive pattern that can be used to identify the elements that are present in the star's atmosphere.

The absorption spectrum offers insightful data on the chemical make-up and physical characteristics of the star. Astronomers can ascertain the elements present, their abundances, and other characteristics like the temperature, pressure, and velocity of the star's atmosphere by examining the absorption lines.

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The elastic potential energy stored in the compressed spring is determined as 11.6 J.

The elastic potential energy of the spring is the energy stored in the spring and the magnitude is calculated as follows;

U = ( ¹/₂kx² )

where;

The given parameters include the following;

the spring constant, k = 580 N/m

the extension of the spring, x = 0.2 m

Substitute the given parameters and solve for the elastic potential energy stored in the spring based on the compression produced by the two blocks.

U = ( ¹/₂kx² )

U = ( ¹/₂ ( 580 N/m ) ( 0.2 m )² )

U = 11.6 J

Thus, the elastic potential energy stored in the compressed spring is a function of the spring constant and extension of the spring.

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Answer:

i found this i hope it helps

Explanation:

The magnitude of this force depends upon the mass of each object and the distance between the centers of the two objects. Mathematically, we say the force of gravity depends directly upon the masses of the objects and inversely upon the distance between the objects squared.

A simple atwood's machine remains motionless when equal masses m are placed on each end of the cord. When a small mass m is added to one side, the masses have an acceleration a. m is (m(g-A)/2a

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Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

x for a smaller magnet at the position marked zin

Answer:

A. NaF and MgS

Explanation:

The reaction equation is given as:

             Na₂S  +  MgF₂  →   2NaF  + MgS

The product of this reaction is  NaF and MgS.

In a double displacement reaction there is an actual exchange of partners to form new compounds. This reaction takes place between ionic compounds.

The driving force for the reaction is:

Given details :

1.Force equilibrium in x direction

∑ \(F{x}\) = 0

F - 39 cos Ф = 0

As Ф = 38°

F = 39 cos38°

F = 30.73 N

Force equilibrium in y direction

∑ \(F{y}\) = 0

N = W + P sin38°

   =  70 + 39 sin38°

N = 93.79 N

Thus the normal force on chair = 93.79 N

From the free body diagram

F = μN

30.73 = μ x 93.79

μ = 30.73 / 93.79 = 0.32

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The wolf's kinetic energy is 2,500 joules, calculated using the formula KE = 0.5 × mass × velocity².

The kinetic energy of an object is the energy it possesses due to its motion.

It can be calculated using the formula KE = 0.5 × mass × velocity², where KE represents kinetic energy, mass is the object's mass in kilograms, and velocity is its speed in meters per second.

In this case, the mass of the wolf is 50 kg, and its velocity is 10 m/s.

Plugging these values into the formula, we get KE = 0.5 × 50 × (10)², which simplifies to KE = 0.5 × 50 × 100.

Therefore, the wolf's kinetic energy is 2,500 joules.

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Answer:

λ₀ = 2 d n

Explanation:

A soap film is a layer where the lus is reflected on the surface and on the inside of the film, these two reflected rays can interfere with each other either constructively or destructively.

Let's analyze the general conditions of this interference,

* When the ray of light reaches the surface of the film it is reflected, as the index of refraction of the air is less than the index of the film, the reflected ray has a phase change of 180º

* When the ray penetrates the film, its wavelength changes due to the refractive index of the film.

          λ = λ₀ / n

where lick is the wavelength in the vacuum or air and n index of refraction of the film, in general this interference is observed perpendicular to the film, so the sine veils 1. the expression for constructive interference taking in what previous remains

         2d = (m + ½) λ

the expression for destructive interference remains

         2d = m λ

          2d = m λ₀ / n

When the film is placed on a glass plate whose index of refraction is greater than the index of refraction of the film, in the reflection in the lower part of the film another phase difference of 180º is created, for which we have a difference of total phase of 180 +180 = 360º, which is equivalent to no phase difference, therefore the two previous equations are interchanged.

Therefore where we had destructive interference now a cosntructive interference happens we can see the reflected light.

Find us the wavelength that this constructive interference creates

           2d n = m λ₀

           λ₀ = 2 d n / m

To find the minimum wavelength, suppose we observe the first interference pattern m = 1

         λ₀ = 2 d n

where d is the thickness of the film and n the index of refraction of the same

The linear momentum of the earth when mass and orbital radius are given is calculated to be 17.8 × 10²⁸ kg m/s.

The orbital radius (r) of earth is 1.496 × 10¹¹ m. So, the distance covered by one rotation is,

Distance = 2 π r = 2π (1.496 x 10¹¹) m

365 day when converted into seconds is, 365 × 24 × 60 ×60 s

So, the period of one rotation is 3.15 × 10⁷ s.

The velocity of earth (v) = distance/time = [2π (1.496 × 10¹¹)]/ 3.15 x 10⁷ = 298840 m/s

Linear momentum = mass × velocity = 5.972 × 10²⁴ kg × 298840 m/s = 17.8 × 10²⁸ kg m/s

Therefore, the linear momentum of earth is 17.8 × 10²⁸ kg m/s

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Answer:

The flux through the sphere will remain the same, and the magnitude of the electric field will increase by four times.

Explanation:

The electric flux is the number of electric field, passing through a given area. It is proportional to the electric field strength and the area through which this field passes.

If the radius of the sphere is halved, the area of the sphere will reduce by square of the reduction, which will be four times. The electric field lines will become closer together, or technically increase by a fourth of its initial value. The resultant effect is that the electric flux will remain the same.

If originally,

Φ = EA cos∅

where Φ is the electric flux through the sphere

E is the electric field on the sphere

A is the area of the sphere.

If the area of the sphere is reduced to half, then,

the area reduces to A/4,

and the electric field increases to be 4E on the sphere.

The flux now becomes

Φ = 4E x A/4 cos∅

which reduces to

Φ = EA cos∅

which is the initial electric flux on the sphere.

The three main parts of a pendulum clock are the pendulum, escapement, and gear train. The swinging frequency of the pendulum varies depending on the type of clock, with cuckoo clocks swinging once per second and large grandfather clocks swinging once every two seconds.

The pendulum is a long, weighted rod that swings back and forth. It acts as the regulator of the clock, determining the timekeeping accuracy. The length of the pendulum determines the rate at which it swings. A longer pendulum will have a slower swing, resulting in a slower clock.

The escapement is a mechanism that controls the release of energy from the clock's mainspring or weight. It ensures that the pendulum swings in a controlled manner, allowing the clock to keep time. The escapement releases the energy in small, regulated increments, providing the necessary impulse to keep the pendulum swinging.

The gear train is a series of gears that transmit the energy from the mainspring or weight to the hands of the clock. As the energy is released, the gears work together to regulate the movement of the hands, allowing the clock to display the correct time.

The swinging frequency of the pendulum varies depending on the type of pendulum clock. For cuckoo clocks, the pendulum typically swings once per second. This fast swing rate allows the clock to keep time accurately within the minute.

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The graph that corresponds to 0.1 s in one complete cycle is graph D.

option D is the correct answer.

The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years.

Also, the period of a wave is the amount of time it takes for a wave to complete one wave cycle or wavelength.

From the given parameter, the coil rotates 10 times in one second. The period of the coil is calculated as;

Period = 1 s / 10

Period = 0.1 s

From the graphs, the only option that has one complete cycle in one second is option D.

Check option D, half cycle is 0.05 s and one full cycle is 0.1 s.

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