In order to move a box filled with equipment to the second story loft in the warehouse, several students built a ramp or inclined plane. There was some disagreement on the height and material for the ramp. The loft height was 2.5 meters. Sara suggested a very long ramp, approximately 25 meters long. The other students disagreed, insisting it would take too much effort to push the box that distance and the ramp should be much shorter and steeper. Instead they built a ramp 10 meters in length. What comments would you make to the students based solely on the mechanical advantage of an inclined plane?

Answer:

Explanation:

Part 0

All the spring moves is 2 cm

x = 2 cm * [1 m / 100 cm ]

x = 0.020 meters

F = k*d

100N = k * 0.02 m

100 N / 0.02 = k

5000 N / m

Part A

The spring feels a force of 100 N - - 100N = 200 N because each person is pulling in the opposite direction.

F = k * x

200N = 5000 N/m * d

200 / 5000 = d

d = 0.04 meters.

Part B

10.2 kg must be converted to a force as experienced here on earth.

F = m * g

g = 9.81

m = 10.2

F = 10.2 * 9.81

F = 100.06 N

F = k * d

100.06 = 5000 * d

d = 100.06 / 5000

d = 0.02 meters.

Answer: The answer to your question is Avogadro's number

Explanation:  It describes the number of representative particles in one mole of a substance. The official definition of the mole is the quantity that describes the number of elementary entities as there are atoms in  

12 g of isotopically pure carbon-12.

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, the name given to the number of particles in a mole is Avogadro's number.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

There is no distinction among Avogadro number or Avogadro constant; they are interchangeable. This is the same as the number of particles in 12 g of cabon-12. Avogadro number is indeed the phrase used to indicate any entity's 6.022 10²³ number. Avogadro's number also isn't utilized in everyday life and is not recommended.

Therefore, the name given to the number of particles in a mole is Avogadro's number.

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Answer:

Plasma

Explanation:

Plasma is the most common because plasma is a gas that has been energized to the point that some of the electrons break

The most common state of matter in the universe is plasma. It is found in stars and lightning, and is produced by heating a gas until its particles are pulled apart to form charged ions and free electrons.

The most common state of matter in the universe is plasma. This is not a state of matter we commonly encounter on Earth, where the most common states of matter are solid, liquid, and gas. However, in the universe at large, plasma is the most abundant. Examples of plasma can be found in stars and lightning strikes.

Plasma is achieved by heating a gas until the particles are pulled apart, causing the electrons to separate from the rest of the particles. This ionized gas, a combination of negatively charged free electrons and positively charged ions , is plasma. It's the most energetic state of matter, as seen in the tremendous energy of stars and lightning.

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Gravity force causes the clouds of dust and gas to form a protostar. As this attraction force is responsible for gathering and compressing the existing elements in the cloud of gas and dust, heating them during this process.

Then, when the amount of material accumulated by gravitational contraction is large enough, and the temperature and pressure reached high enough, the nuclear fusion process will begin.

To understand it better: The hydrogen nuclei will begin to fuse, generating helium nuclei in the process and releasing huge amounts of energy.

It should be noted that the protostars radiate half of the energy contributed by the gravitational collapse and the other half is invested in heating its core.

Answer:

A gas expands spontaneously to fill its container.

Explanation:

A gas would always expand spontaneously in any container to fill it up. Gas moves unaided to assume the volume of the space they are put into. Gas molecules are more random and posses more kinetic energy to drive their movements from one place to another. Gases would not require any energy input to make them move.

The volume of a container would then be the same as the volume of the gas that occupies it. Also, when pressure is applied to a gas, the volume reduces considerably according to "Boyle's law".

A homogeneous mixture would have their constituents existing in just one phase. Regardless of any chemical properties of gases, they form homogeneous mixtures.

Answer:

Explanation: A fuse or a circuit breaker automatically disconnects a circuit from the electric power the moment more current is drawn than its design allows. Electrical codes require one or the other to be installed at the point where power first enters a building. The electric supply to a home is usually divided into several circuits, each with its own fuse or breaker, of a rating appropriate for the thickness of the circuit's wires. That way, if the power is interrupted in part of the home, the rest of the home stays connected.

Fuses protect appliances from power surges, prevent metal casings from being electrified, and prevent electrocution by breaking when a wire becomes too hot, interrupting the electrical current and flow.

A short circuit causes excessive flow of current in the wire.As we know that the flow of current is due to the amount of charge flowing in the wire.

Fuses protect appliances from power surges, prevent metal casings from being electrified, and prevent electrocution by breaking when a wire becomes too hot, interrupting the electrical current and flow.

Due to movement of large number of electron in the wire or circuit with an intended path cause the short circuit in the wire.

If your circuit breaker continues tripping, there's probably a problem with the circuit. A short circuit in one of the appliances or in the wiring might be the cause.

It's possible that the breaker is tripping due to a ground fault. A circuit overload is possible.

Hence, fuses and circuit breakers protect against electrocution and household fires by breaking the circuit.

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Explanation:

A small piece of energy is called as Electron. It cannot be broken down further into smaller pieces. Photon is a basic unit of light. Photons always travel. They are in a continuous motion. So when electron needs energy, They absorb light. The light is absorbed or emitted in the form of photons. Each photon contains energy which is absorbed by the electron to gain its energy. After absorbing the photon, electron moves towards a higher energy level. So when an electron absorbs a photon, energy is gained by the electron.

Answer: 1. high-energy

2. deposition

3. Silt

4. limestone

5. soluble

6. tectonic forces

7. before

8. faunal succession

9. nondeposition

10. coarser

Explanation:

Answer: (1) Fluvial environment

(2) Deposition

(3) Limestone

(4) Sandstone

Explanation:

The highest parts of a transverse wave are called "crests."

When a wave travels through a medium, its particles oscillate back and forth around their equilibrium positions. In a transverse wave, the motion of the particles is perpendicular to the direction of the wave propagation.

These waves have crests and troughs. The highest points, where the particles are at their maximum displacement upwards from their rest position, are known as "crests."

Conversely, the lowest points, where the particles are at their maximum displacement downwards from their rest position, are known as "troughs."

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Answer:

i'm not sure if you are asking as a  personal question or a book question so i'm taking it personal.

Explanation:

I was doing a simple task that was handed to me to test my responsibility and I agreed (knowing i am responsible :3). my first thought was "man , this is easy!" but then i started seeing the other kids slaking off and quiting their tasks. I thought that was against the rules, but then i saw my bff doing it too and i thought "this should be ok then!" so i did the same. other kids where still doing it. the teacher came, saw the ones still working and smiled... but when the teacher looked at the ones slaking off omg... his face was like * im gonna kill yall* we took one big gulp and whined. the teacher awarded the ones who completed the task... the others , we had to do our original task but doubled... for 3 weeks!!! it was awful!!!

I WOULD NEVER DO THAT AGAIN!!!

I observed a classmate cheating during a test, but I chose not to follow their lead. Cheating is unethical and goes against the principles of honesty and integrity. I would not repeat such actions in the future.

In Social Studies, I observed a situation where a classmate was directly copying another student's answers during a test. Seeing their behavior, I was encouraged to cheat and copy answers. However, I realized that this was a bad action as it goes against the principles of honesty and integrity. I chose not to follow their lead and instead completed the test using my own knowledge.

Cheating is unethical and can have serious consequences. It undermines the learning process and breeds a culture of dishonesty. I would not repeat such actions in the future, as it is important to prioritize integrity and personal growth.

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Answer:

According to the kinetic-molecular theory of gases, gases are composed of atoms and molecules (particles), where the distance among these elements is very large compared to their own size, therefore the total volume occupied by these particles is only a small part of the total volume occupied by the whole gas.

In other words: a gas has enough empty spaces in its total volume, therefore low density, which gives it the property of being highly compressible.

In this same sense, the kinetic-molecular theory of gases starts from the first principle of thermodynamics, establishing a relationship between heat and movement, since all material is composed of particles that are in motion (to a certain extent , depending on the state of matter), and in the case of gases the movement is greater, which is a strong indication of heat (thermal energy).

Now, gases can change their volume in two ways:

-By a change in temperature (heat transfer).

-By a change of pressure

So, this change or variation in volume is related to the work the gas does to change from an initial volume to a final volume.

Then, if in this process the volume decreases, it is said that the gas has been compressed (compression work); but if, on the contrary, the volume increases, the gas will have expanded (expansion work).

In this way, with the increase of the temperature of the gas, it is expanded by the increase of the kinetic energy of its molecules, but if an external pressure is applied it is compressed.

The compression and expansion of gases occur due to free spaces between gas particles.

Because of the space between gas particles, gases are easily compressed when pushed into a smaller volume. When the pressure is removed, their random motion enables gases to expand.

So we can conclude that the compression and expansion in gases occur due to free spaces between gas particles.

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Answer:

yes

Explanation:

Here, the formula for gravity is,

g=GM/R^2

so, to change gravity, either we have to change mass(M) or radius(R) of the planet.

similarly, the formula for electrical force is,

F= kq1q2 / r^2

and to change the electrical force, either we have to change the magnitude of charge(q) or the distance between the two charges(r).

71% I Think is answer

Answer:

The stratosphere

Answer:youre moms pssy is sweet is the nswer to this question

Explanation:

Hyperopia (farsightedness) is a vision problem in which close objects are confusingly perceived. This is because the eyeball of a hyperopic person is shorter than the normal eye and the image forms behind the retina.

Therefore, these people have difficulty seeing objects up close.

To solve this, convex lenses are used. This type of lens are thicker at the center than at its edges and their function is to converge the rays of light so that they can reach the region of the retina called macula and the image can be formed correctly.

Answer:

[tex]1.6\cdot 10^{-12}N[/tex]

Explanation:

The electric force on a charged particle is given by

[tex]F=qE[/tex]

where

q is the charge of the particle

E is the strength of the electric field

In this problem, we have

[tex]E=1.0\cdot 10^7 N/C[/tex] is the electric field strength

[tex]q=+e=+1.6\cdot 10^{-19}C[/tex] is the charge of the calcium ion

Therefore, the electric force exerted on the calcium ion is

[tex]F=(1.6\cdot 10^{-19}C)(1.0\cdot 10^7 N/C)=1.6\cdot 10^{-12}N[/tex]

Answer:

What is the speed of the mountain lion as it leaves the ground?

9.98m/s

At what angle does it leave the ground?

50.16°

Explanation:

This is going to be long, so if you want to see how it was solved refer to the attached solution. If you want to know the step by step process, read on.

To solve this, you will need use two kinematic equations and SOHCAHTOA:

[tex]d = v_it + \dfrac{1}{2}at^{2}\\\\vf = vi + at[/tex]

With these formulas, we can derive formulas for everything you need:

Things you need to remember:

First we need to take your given:

10.0 m long (horizontal) and maximum height of 3.0m (vertical).

[tex]d_x=10.0m\\d_y=3.0m[/tex]

What your problem is looking for is the initial velocity and the angle it left the ground.

Vi = ?     Θ =?

Vi here is the diagonal movement and do solve this, we need both the horizontal velocity and the vertical velocity.

Let's deal with the vertical components first:

We can use the second kinematic equation given to solve for the vertical initial velocity but we are missing time. So we use the first kinematic equation to derive a formula for time.

[tex]d_y=V_i_yt+\dfrac{1}{2}at^{2}[/tex]

Since it is at maximum height at this point, we can assume that the lion is already making its way down so the initial vertical velocity would be 0 m/s. So we can reduce the formula:

[tex]d_y=0+\dfrac{1}{2}at^{2}[/tex]

[tex]d_y=\dfrac{1}{2}at^{2}[/tex]

From here we can derive the formula of time:

[tex]t=\sqrt{\dfrac{2d_y}{a}}[/tex]

Now we just plug in what we know:

[tex]t=\sqrt{\dfrac{(2)(3.0m}{9.8m/s^2}}\\t=0.782s[/tex]

Now that we know the time it takes to get from the highest point to the ground. The time going up is equal to the time going down, so we can use this time to solve for the intial scenario of going up.

[tex]vf_y=vi_y+at[/tex]

Remember that going up the vertical final velocity is 0m/s, and remember that gravity is always moving downwards so it is negative.

[tex]0m/s=vi_y+-9.8m/s^{2}(0.782s)\\-vi_y=-9.8m/s^{2}(0.782s)\\-vi_y=-7.66m/s\\vi_y=7.66m/s[/tex]

So we have our first initial vertical velocity:

Viy = 7.66m/s

Next we solve for the horizontal velocity. We use the same kinematic formula but replace it with x components. Remember that gravity has no influence horizontally so a = 0:

[tex]d_x=V_i_xt+\dfrac{1}{2}0m/s^{2}(t^{2})\\d_x=V_i_xt[/tex]

But horizontally, it considers the time of flight, from the time it was released and the time it hits the ground. Also, like mentioned earlier the time going up is the same as going down, so if we combine them the total time in flight will be twice the time.

T= 2t

T = 2 (0.782s)

T = 1.564s

So we use this in our formula:

[tex]d_x=V_i_xT\\\\10.0m=Vi_x(1.564s)\\\\\dfrac{10.0m}{1.564s}=V_i_x\\\\6.39m/s=V_i_x[/tex]

Vix=6.39m/s

Now we have the horizontal and the vertical component, we can solve for the diagonal initial velocity, or the velocity the mountain lion leapt and the angle, by creating a right triangles, using vectors (see attached)

To get the diagonal, you just use the Pythagorean theorem:

c²=a²+b²

Using it in the context of our problem:

[tex]Vi^{2}=Viy^2+Vix^2\\Vi^2=(7.66m/s)^2+(6.39m/s)^2\\\sqrt{Vi}=\sqrt{(7.66m/s)^2+(6.39m/s)^2}\\\\Vi=9.98m/s[/tex]

The lion leapt at 9.98m/s

Using SOHCAHTOA, we know that we can TOA to solve for the angle, because we have the opposite and adjacent side:

[tex]Tan\theta=\dfrac{O}{A}\\\\Tan\theta=\dfrac{V_i_y}{V_i_x}\\\\\theta=Tan^{-1}\dfrac{V_i_y}{V_i_x}\\\\\theta=Tan^{-1}\dfrac{7.66m/s}{6.39m/s}\\\\\theta=50.17[/tex]

The lion leapt at an angle of 50.16°.

a. To find the speed, use projectile motion equations. b. To find the angle, use the equation tan(theta) = vertical velocity / horizontal velocity.

a. To find the speed of the mountain lion just as it leaves the ground, we can use the equations of projectile motion. Since the lion reaches a maximum height of 3.0 m, we know that the initial vertical velocity is 0 m/s. Using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time, we can solve for the initial vertical velocity. Substituting the values: 0 = u + (-9.8 m/s^2) * t, where t is the time taken to reach the maximum height. Solving this equation gives us the value of t. From the given information of the leap being 10.0 m long, we can use the equation d = ut + (1/2)at^2 to solve for the initial horizontal velocity. Combining the horizontal and vertical velocities using the Pythagorean theorem, we can calculate the speed of the mountain lion.

b. To find the angle at which the mountain lion leaves the ground, we can use the equation tan(theta) = vertical velocity / horizontal velocity. Solving this equation will give us the angle at which the lion leaves the ground.

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7. It’s just a question of keeping the ratios the same.

Beta rays . . . No.  These are streams of negatively charged electrons.

Alpha rays . . . No.  These are streams of pairs of positively charged protons, identical to nucleii of Helium atoms.

Gamma rays (A) . . . Yes.  These are electromagnetic waves, not composed of charged particles.

Gamma rays are radiation that has no electric charge associated with it, as they are electromagnetic waves created from energy transitions in atomic nuclei.

Among the options given, gamma rays have no electric charge associated with them. Alpha rays are helium nuclei consisting of 2 protons and 2 neutrons and carry a positive charge. Beta rays are high-energy electrons or positrons and carry a negative or positive charge respectively. However, gamma rays are electromagnetic waves, similar to light or X-rays, and do not carry a charge because they are created from energy transitions in the atomic nucleus.

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Answer:

6

Explanation:

The rate of change in this scenario corresponds to the number of inches that Ree grows every year. Basically, Ree's height can be written as a linear equation as follows:

[tex]y=mx+q[/tex]

where

x is the number of years after the first birthday

y is the height in inches

q = 27 is the height of Ree on her first birthday

m = 6 is the inches gained by Ree at each birthday

So the equation can also be rewritten as

y = 6x + 27

Answer:

6

Explanation:

Answer:

Not necessarily, if the air masses are not strong enough, a stationary front is caused

Explanation:

A front is a block of separation between two air masses at different temperatures. They can be classified as cold, warm, stationary and occluded fronts. When a front is formed, a collision occurs between the two masses, generating a very dynamic activity, with electrical storms, gusts of wind and downpours.

A stationary front is one where neither of the two air masses are strong enough to replace the other. On such a front can generate atmospheric conditions such as prolonged rainfall and high cloudiness.

After several days, the stationary fronts may dissipate or become a cold or warm front. .

Answer:

75 m

Explanation:

The horizontal motion of the projectile is a uniform motion with constant speed, since there are no forces acting along the horizontal direction (if we neglect air resistance), so the horizontal acceleration is zero.

The horizontal component of the velocity of the projectile is

[tex]v_x = 15 m/s[/tex]

and it is constant during the motion;

the total time of flight is

t = 5 s

Therefore, we can apply the formula of the uniform motion to find the horizontal displacement of the projectile:

[tex]d= v_x t =(15 m/s)(5 s)=75 m[/tex]

The horizontal displacement of a projectile can be calculated using the formula x = Vx*t. Given an initial horizontal velocity of 15 m/s and a flight time of 5 seconds, the horizontal displacement is 75 meters.

In physics, the path a projectile takes is composed of both horizontal and vertical components. Both these are independent of one another and have their own distinct characteristics. For the given scenario, the horizontal displacement, which tells us how far the projectile travels horizontally, can be found using the formula x = Vx*t, where Vx represents the initial horizontal velocity and t is the total time of flight.

In this case, Vx equals 15 meters per second and t equals 5 seconds. Substituting these values into the formula gives us x = 15 m/s * 5 s, which results in a horizontal displacement of 75 meters.

Please remember that this calculation assumes there's no air resistance and the object is launched and lands at the same height. Any alterations in these factors, like a taller launch height or the presence of air resistance, will affect the outcome.

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Answer: SBb

On 1930 the astronomer Edwin Hubble classified the galaxies based on their visual appearance into elliptical, spiral and irregular, being the first two classes the most frequent.  

So, according to this classification, the Milky Way is a barred spiral galaxy (SBb in Hubble's notation system) because it has a central bar-shaped structure of bright stars that spans from one side of the galaxy to the other. In addition, its spiral arms seem to emerge from the end of this "bar".

Scientifics considered this, after measuring the the disk and central bulge region of the galaxy, and the conclusion is the Milky Way fulfills these conditions, because is a galaxy that orbits on its same axis and with this rotation its arms are twisted in opposite directions around the mentioned axis.

4.  A. Increase

The magnitude of the electric force between two charges is given by Coulomb's law:

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

where

k is the Coulomb's constant

q_1 and q_2 are the two charges

r is the separation between the two charges

As we see from the formula, the strength of the electric force is:

- directly proportional to the two charges q1 and q2

- inversely proportional to the square of the distance r

Therefore, we can conclude that:

- if the magnitude of the charges increases, then the magnitude of the force will increases as well

- if the separation between the charges increases, then the magnitude of the force will decrease

5. A. Increase by the same factor

Again, the magnitude of the electric force between the two charges is given by Coulomb's law:

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

we have said that the force F is directly proportional to the two charges q_1 and q_2.

Let's assume now that charge q_1 is increases by a certain factor A. Then the electric force will change as follows:

[tex]F'=k\frac{(A q_1) q_2}{r^2}=A(k\frac{q_1 q_2}{r^2})=A\cdot F[/tex]

so, the magnitude of the electric force has increased by the same factor.

6. A. The electric force would decrease.

This part is similar to part 5, however this time the charge q_1 is decreased.

This means that we can rewrite the new charge q1 as

[tex]q_1 ' = \frac{q_1}{A}[/tex]

where A > 1. Let's see how the electric force changes:

[tex]F'=k\frac{(\frac{q_1}{A}) q_2}{r^2}=\frac{1}{A}(k\frac{q_1 q_2}{r^2})=\frac{F}{A}[/tex]

This means that the magnitude of the electric force has decreased by the same factor.

Answer:BRAIN

Explanation:

Try B-momentum that is what I think that it is

Answer:

B. get smaller

Explanation:

The parallax angle of a star measured with respect to the Earth is inversely proportional to the distance of the star from the Earth:

[tex]\theta = \frac{1}{d}[/tex]

where

[tex]\theta[/tex] is the parallax angle, measured in arcsec

d is the distance between the star and the Earth, measured in parsec

Therefore, if the star Alpha Centauri is moved farther from Earth, then d increases, and therefore the parallax angle will get smaller.

Answer:

c)At a distance greater than r

Explanation:

For a satellite in orbit around the Earth, the gravitational force provides the centripetal force that keeps the satellite in motion:

[tex]G\frac{Mm}{r^2}=m\frac{v^2}{r}[/tex]

where

G is the gravitational constant

M is the Earth's mass

m is the satellite's mass

r is the distance between the satellite and the Earth's centre

v is the speed of the satellite

Re-arranging the equation, we write

[tex]r = \frac{GM}{v^2}[/tex]

so we see from the equation that when the speed is higher, the distance from the Earth's centre is smaller, and when the speed is lower, the distance from the Earth's centre is larger.

Here, the second satellite orbit the Earth at a speed less than v: this means that its orbit will have a larger radius than the first satellite, so the correct answer is

c)At a distance greater than r

Answer:

Internal energy lost by a system is always gained by the surroundings

The universe is an isolated system

According to the first law of thermodynamics:

Then this law relates the work and the transferred heat exchanged in a system through the internal energy, which is neither created nor destroyed, it is only transformed.

In other words: The change in the internal energy of a system is equal to the net heat that is transferred to it plus the net work done on it.

The universe is an isolated system, energy lost is equal to energy gained according to the first law of thermodynamics.

According to the first law of thermodynamics, energy is neither created nor destroyed but is converted from one form to another. This is demonstrated by the equation; E = q + w

E = internal energy of the system

q = heat gained/lost by the system

w = work done on/by the system

The following statements are true based on the first law of thermodynamics;

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