Which of the following groups of elements is ranked from least reactive to most reactive?
A. Sr, Ca, Mg, Be
B. K, Na, Li, H
C. Li, Na, K, Rb
D. K, Ca, Sc, Ti

Answer:

Force and Motion

Answer:

Acceleration

Explanation:

Any change in speed is change in velocity which is referred to as acceleration.

Answer:

Explanation:

A two-track correctional system separates non-violent and violent offenders, providing distinct rehabilitation and incarceration methods for each.

A two-track correctional system provides different types of rehabilitation and incarceration for different groups. For non-violent offenders, the focus is on rehabilitation, education, and community service. On the other hand, violent offenders might face more stringent penalties and longer incarcerations.

Effectiveness in the US

Whether such a system would work better in our country is a matter of debate. Currently, the US criminal justice system faces significant challenges, including high recidivism rates, racial and ethnic disparities, and varying treatment based on social class. Implementing a two-track system may help in better addressing the roots of criminal behavior, especially for non-violent offenders who may benefit more from rehabilitative services than from traditional incarceration.

Reducing Recidivism

In theory, a two-track system could reduce the percentage of offenders reentering the system. Providing specific rehabilitation and education programs for non-violent offenders can address underlying issues such as addiction, lack of job skills, or mental health problems. These programs have been shown to lower recidivism rates by preparing individuals for successful reentry into society.

Answer:

chemical potiential energy

Answer:

A: Gravitational potential energy

Explanation:

Plants use the energy of the sun to transform it to food which is energy that is stored and is used to "work"

Answer:

A. The time taken for the car to stop is 3.14 secs

B. The initial velocity is 81.64 ft/s

Explanation:

Data obtained from the question include:

Acceleration (a) = 26ft/s2

Distance (s) = 256ft

Final velocity (V) = 0

Time (t) =?

Initial velocity (U) =?

A. Determination of the time taken for the car to stop.

Let us obtain an express for time (t)

Acceleration (a) = Velocity (V)/time(t)

a = V/t

Velocity (V) = distance (s) /time (t)

V = s/t

a = s/t^2

Cross multiply

a x t^2 = s

Divide both side by a

t^2 = s/a

Take the square root of both side

t = √(s/a)

Now we can obtain the time as follow

Acceleration (a) = 26ft/s2

Distance (s) = 256ft

Time (t) =..?

t = √(s/a)

t = √(256/26)

t = 3.14 secs

Therefore, the time taken for the car to stop is 3.14 secs

B. Determination of the initial speed of the car.

V = U + at

Final velocity (V) = 0

Deceleration (a) = –26ft/s2

Time (t) = 3.14 sec

Initial velocity (U) =.?

0 = U – 26x3.14

0 = U – 81.64

Collect like terms

U = 81.64 ft/s

Therefore, the initial velocity is 81.64 ft/s

Final answer:

To find the stopping time and initial speed of the car, kinematic equations for constant acceleration are used. The initial speed is calculated using the equation for the final velocity at rest, and the time is then determined by the equation relating velocity, initial speed, and acceleration. The car takes 3 seconds to stop completely.

The car travels 39.0 ft in this time.

The car's initial velocity was 52 ft/s.

Explanation:

To determine how long the car takes to stop and the car's initial speed, we can use the kinematic equations of motion for constant acceleration. Given that the deceleration is 26ft/s2 and the skid to a stop is 256 feet, we use the equation v2 = u2 + 2as, where v is the final velocity, u is the initial velocity, a is the acceleration, and s is the distance traveled. Because the car comes to a stop, the final velocity v is 0.

The equation simplifies to u2 = -2as. Substituting the given values, we get u2 = -2(−26)(256), so the initial speed u = √(2 × 26 × 256).

Once we find u, we can use the equation v = u + at to find the time t the car takes to stop. Rearranging for t, we have t = (v - u)/a. We substitute v = 0 and the calculated initial speed for u to get t.

Answer:

Vocal Cords

Explanation:

Air passes through the vocal cords causing them to vibrate.

Answer:

the vocal cords

Explanation:

Answer: C. Meyer did not leave gaps while Mendeleev did.

Explanation: Mendeleev's table was table different from Meyer's table because Meyer did not leave gaps while Mendeleev did.

Answer:

Total voltage of the battery is 12 volts.

Explanation:

It is given that, we have three identical resistors of resistance 3 ohms are connected in series in a circuit. It is required to find the total voltage of the battery if the current in the circuit is 2 A.

Let [tex]R'[/tex] is the equivalent resistance in series combination. The equivalent resistance is given by :

[tex]R'=R_1+R_2\\\\R'=3+3\\\\R'=6\ \Omega[/tex]

Let V is the total voltage of the battery. Ohm's law is given by :

[tex]V=IR\\\\V=2\times 6\\\\V=12\ V[/tex]

So, the total voltage of the battery is 12 volts.

Answer:

-6.00 - a p e x

Answer: T = 305.22 K

Explanation: given that

from -90 degree Fahrenheit to -5

degree Kelvins

Using the formula

(9/5 C) + 32 = F

Let's first convert degree Fahrenheit to degree Celsius

90 = 9C/5 + 32

9C/5 = 90 - 32

9C/5 = 58

9C = 290

C = 290/9

C = 32.22 degree Celsius

Convert degree Celsius to Kelvins

T = 273 + C

T = 273 + 32.22

T = 305.22K

Final answer:

To convert temperature from Fahrenheit to Kelvin, you can use the formula K = (F + 459.67) * 5/9. The temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.

Explanation:

To convert temperature from Fahrenheit to Kelvin, you can use the formula:
K = (F + 459.67) * 5/9

Using this formula, let's calculate the Kelvin temperatures for the given Fahrenheit temperatures:

-90°F:
K = (-90 + 459.67) * 5/9 = 183.15 K

-5°F:
K = (-5 + 459.67) * 5/9 = 252.04 K

Therefore, the temperatures of -90°F and -5°F are equivalent to approximately 183.15 K and 252.04 K, respectively.

the fences around individual shops or homes in eastern Spain

The student's question is about a boundary around 40° N latitude and 0° longitude, which lies in the midlatitudes region. The exact nature of the boundary is unclear, but it could relate to geographic or climatic divisions. Additional context is needed for a precise answer.

The student is asking about a type of boundary that can be located around 40° N latitude and 0° longitude. This location is commonly associated with the midlatitudes, which are the regions of Earth that are neither part of the tropics nor the polar regions. The boundary mentioned in the context of latitude around this area could be referring to the division between the Earth's climatic cells, such as the boundary between the Ferrel cell and the polar cell, which typically occurs around the 60° latitude. However, since the question specifies around 40° N latitude, which is within the middle latitudes, it's not clear which specific type of boundary the student is inquiring about without additional context.

In the absence of additional context, it's also worth noting that the Equator, Arctic Circle, and Antarctic Circle are important parallels but do not intersect 40° N latitude. The prime meridian is the only line of longitude with a value of 0° and intersects the Earth at different latitudes, including 40° N.

Answer: Its B on Edge

Explanation: Trust

Answer:

It's D

Explanation:

I have the answer key

Answer:

a)Visibile light waves

Explanation:

Answer: A, B, G

Explanation:

Answer:

.

Explanation:

The increase in the length of the 39 m steel railroad track when the temperature rises from 8°C to 37°C is approximately 0.492 inch, calculated using the linear thermal expansion formula ΔL = αLΔT.

The question asks for the increase in the length of a steel railroad track when the temperature rises from 8°C to 37°C. To find the increase in length, we can use the formula for linear thermal expansion: ΔL = αLΔT, where ΔL is the change in length, α is the coefficient of linear expansion, L is the original length, and ΔT is the change in temperature.

Given:

Using the formula:

ΔL = αLΔT
ΔL = (11 x 10-6 °C⁻¹)(39 m)(29°C)
ΔL = 0.012507 m

To convert ΔL to inches, we use the conversion factor 1 inch = 0.0254 m:

ΔL = 0.012507 m / 0.0254 m/inch
ΔL ≈ 0.492 inch

Therefore, the increase in the length of the steel rail on a hot day when the temperature is 37°C is approximately 0.492 inch.

Answer:

waxing gibbous moon so in this case gibbous

Explanation:

Answer:

They move farther apart

Explanation:

When objects heat up they expand for example heating up a balloon makes it expand

Explanation:

Lee's surrender did not end the Civil War, but it was the beginning of the end. The surrender of other Confederate armies began shortly after: The Army of Tennessee surrendered on April 26, 1865. Confederate armies in Alabama, Mississippi, and eastern Louisiana all surrendered on May 4, 1865.

ok this is the answer

Final answer:

The correct answer is C. Arrows point away from north and toward south.

Explanation:

The correct answer would be option C. Arrows point away from north and toward south. In a bar magnet, the magnetic field lines are defined to have the direction that a small compass points when placed at a location. If we use small compasses to map the magnetic field around a bar magnet, they will point away from the north pole of the magnet and toward the south pole of the magnet. So, the magnetic field lines would point away from the north pole and towards the south pole of a bar magnet.

Answer:

A. negativly charged

B. leader

C. return stroke

D. possitively charged

Explanation: hope this helps!!

The label for each of the identified points in the sketch is A the cloud that is negatively charged, B lightening, C leader, and D earth's surface which is positively charged.

The principle of lightning is based on the buildup of electrical charge in the atmosphere. Lightning is an electrical discharge that occurs when there is a difference in electrical charge between the atmosphere and the ground. This difference in charge is caused by the separation of positive and negative charges within a thunderstorm cloud.

The main parts of a lightning bolt are:

The stepped leader: This is the initial discharge of electricity that moves towards the ground from the cloud. The stepped leader is a series of steps that propagate toward the ground in a zigzag pattern.

The dart leader: This is a single path that moves rapidly towards the ground, and it usually follows the path established by the stepped leader.

The return stroke: This is the main flash of lightning that we see. It is the result of the connection between the downward-moving stepped leader or dart leader and the upward-moving streamers from the ground. This connection completes the electrical circuit and allows the discharge of electricity to occur.

The Thunder: This is the sound that is produced by the sudden expansion of air around the lightning bolt. Thunder is caused by the intense heat of lightning, which can heat the air to temperatures of up to 30,000 Kelvin (53,540 degrees Fahrenheit).

Lightning is a complex and dynamic phenomenon, and there are many different factors that can affect the way it behaves. However, these four parts are the basic components of a lightning bolt and help us understand how it is formed and how it travels from the cloud to the ground.

Therefore, the leaders coming from the cloud are negatively charged, while the streamers on the ground are positively charged. The return stroke, which is the main flash of lightning, consists of positively charged ions moving from the ground to the cloud.

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The answer is:

True

Hope this Helps

Please mark my nswer as brainliest?

Answer:

the moon isn't always at the right angle between the earth and the sun for us to see or for it to have a effect not the best at space but that's what I think the reason is . I wonder what the proper  answer is

Explanation:

Answer:

Epsilon Eridani

Explanation:

This is in the main sequence as you can see there is an area called "main sequence all you have to do is read all the stars and to see which one is in there and that is The epsilon eridani

Option C is correct. A star in the main sequence will be Epsilon Eridani.

Epsilon Eridani is a star in the Eridanus constellation, located  south of the celestial equator. This makes it visible from the majority of the Earth's surface. 

A star is a heavenly body made up of a brilliant spheroid of plasma held together by gravity. The Sun is the closest star to Earth.

Many additional stars may be seen with the normal eye at night, but due to their great distance from Earth, they appear as stationary points of light in the sky.

A star in the main sequence will be Epsilon Eridani.

Hence, option C is correct.

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Answer:

1.f   2.c   3.d   4.e   5.d   6.a

Explanation:

The third sentence is the inertial law itself. Concentrate in understanding that, and you will understand everything. For example, planets move for billion years because there is no friction in space, which help to understand the second sentence. Mass and inertia is practically the same thing. That's what explain why heavy objects are harder to change its motion. But, if an object has an unbalanced force, the net force is not zero, and if there is no friction, the object will change its motion.

Answer/Explanation:

Mercury

1) What is the orbit of the Mercury?

The shape of the orbit is oval

2) Is the Sun at the center of the Earth’s orbit?

No

3) Describe the motion of the Earth throughout its orbit?

Starts fast then gets slower then begins to speed up again

4) Does it move at constant speed?

No

Earth

1) What is the orbit of the Earth?

The shape of the orbit is circular

2) Is the Sun at the center of the Earth’s orbit?

Yes

3) Describe the motion of the Earth throughout its orbit?

Travels at a steady consistent speed.

4) Does it move at constant speed?

Yes

Mars

1) What is the orbit of the Mars?

The shape of the orbit is circular

2) Is the Sun at the center of the Earth’s orbit?

Yes

3) Describe the motion of the Earth throughout its orbit?

Travels at a steady consistent speed.

​4) Does it move at constant speed?

Yes

Saturn

1) What is the orbit of the Saturn?

The shape of the orbit is circular

2) Is the Sun at the center of the Earth’s orbit?

Yes

3) Describe the motion of the Earth throughout its orbit?

Travels at a steady consistent speed.

​4) Does it move at constant speed?

Yes

Neptune

1) What is the orbit of the Neptune?

The shape of the orbit is circular

2) Is the Sun at the center of the Earth’s orbit?

Yes

3) Describe the motion of the Earth throughout its orbit?

Travels at a steady consistent speed.

4) Does it move at constant speed?

Yes

Comet

1) What is the orbit of the Comet?

The shape of the orbit is oval

2) Is the Sun at the center of the Earth’s orbit?

No

3) Describe the motion of the Earth throughout its orbit?

starts slow and gets faster and faster

4) Does it move at constant speed?

No

The orbits of Mercury, Earth, Mars, Saturn, Neptune, and comets around the Sun are elliptical, with the Sun at one of the two foci. Their motion is not at a constant speed but is faster when they are closer to the Sun in accordance with Kepler's laws of planetary motion.

The orbits of the planets and comet in our solar system, including Mercury, Earth, Mars, Saturn, Neptune, and comets are all elliptical, not circular. This is according to Kepler's First Law of Planetary Motion. The Sun is not at the center of these orbits but at one of the two foci of the ellipse.

The motion they follow around the Sun, known as orbital motion, is not at a constant speed. This is according to Kepler's Second Law, which states that a line joining a planet and the Sun sweeps out equal areas in equal intervals of time. This means when the planet is closer to the Sun in its orbit, it moves faster. And when it's farther from the Sun, it moves slower.

The same applies to a comet. A comet's orbit can be highly elliptical, and it moves fastest when it is closest to the Sun (the perihelion).

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Answer:

You may be able to avoid these annoyances in the chromosphere — the reddish middle layer of the sun that links the star's surface to its outer atmosphere, or corona — but that neighborhood is not without its hazards, either. This vast layer is marked by a constantly moving forest of plasma spears known as spicules.

Explanation:

Answer:

D. Chromosphere

Explanation:

The chromosphere contains spikes of gas called spicules. Spicules are short-lived phenomena, corresponding to rising jets of gas that move upward at about 30km/sec and last only about 10 minutes.

Answer:

Faster

Explanation:

The closer the particles are together, the faster sound is able to move.

Sound travels the slowest through the air because gas particles are more spread apart than liquids or solids.

Sound will travel the fastest through solids because the particles in solids are densely packed together.

Final answer:

Sound travels faster in mediums where particles are closer together due to increased density. Solids, being more dense, allow for quicker sound transmission compared to liquids and gases. Temperature and movement of the medium also play a role in the speed of sound.

Explanation:

The closer the particles are together, the faster sound is able to move. This principle is due to the increased density of the medium, which allows sound waves to be transmitted more efficiently between particles. Sound travels faster in solids than in liquids, and faster in liquids than in gases because the particles in solids are much closer together, making solid mediums the most dense.

Furthermore, temperature affects the speed of sound; warmer mediums increase particle movement leading to faster sound transmission. Additionally, the speed of sound is influenced by the medium's movement, such as the impact of wind helping or hindering the travel of sound waves depending on the direction of the sound relative to the wind.

An object moving with constant acceleration will display a nonlinear relationship on a position-time graph due to the consistent change in velocity.

For an object moving at a constant acceleration, the position-time graph would have a nonlinear shape. This is due to the fact that constant acceleration implies a constant rate of change in velocity, which in turn means that the object's speed is increasing or decreasing consistently over time. On a position-time graph, this is represented by a curve, rather than a straight line, demonstrating a nonlinear relationship between time and position. For instance, the graph might show a parabolic curve if the object is speeding up, or a hyperbolic curve if it is slowing down.

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Answer:

Digested food is a source of potential energy

Explanation: