what is the symbol for an ion with six electrons, seven protons, and eight neutrons?

The uniform motion ratios allow finding which intervals have constant velocity, the correct answers are

         BC       Positive velocity

         CD       Zero speed

         DE       Negative velocity

Kinematics studies the movement of bodies, establishing relationships between position, velocity and acceleration. In the special case that the acceleration is zero the motion is called uniform movement

        v = \(\frac{\Delta_x}{\Delta t}\)

        Δx = v Δt

Where v is average velocity, Δx is the position variation and Δt is the time variation in the analyzed interval.

This equation we see that the relationship between displacement and time is linear, let's analyze each interval given in the graph

AB interval

   In this interval the graph shows a curve whereby the movement is accelerated

BC interval

  In this interval the graph is a line with a positive slope, therefore the movement is uniform with positive velocity

CD interval

    In this part we have a line of zero slope

     In motion it is uniform with zero speed, that is, the car is stopped

DE interval

    The graph of this section is a line with a negative slope, consequently the velocity is negative.

With this analysis we see that the only interval that the movement is accelerated is the AB interval  

In conclusion, using the uniform motion relationships we can find that intervals have constant velocity, the correct answers are

         BC     Positive velocity

         CD     Zero speed  

         DE     Negative velocity

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Answer:

Volt divided by ampere

Explanation:

V = IR

V/I = R

The unit of resistance from ohms law is volt / ampere. Thus, option A is correct.

Ohm's law states that the applied voltage is directly proportional to the current flow in the conductor. It is written as V ∝ I. It remains constant at room temperature.

V is defined as  potential difference or voltage. The SI unit of voltage is volt(V). I is defined as the current flowing in the circuit. The SI unit of current is ampere (A).

Generally, ohm's law equals to V = IR. R represents resistance of a material which oppose the current flow in the conductor. The unit of resistance is ohm(Ω).

When the potential difference(V) is constant, Resistance is inversely proportional to current. Current increases with decrease of resistance and current decreases with increase of resistance.

To find  equivalent unit of resistance, the ohm's law is :

V = IR

R = V / I

  = volt / ampere.

Hence, the unit of resistance from ohm's law is volt / ampere. The SI unit of resistance is ohm(Ω). Thus, option A is correct.

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The type of ignition that occurs when a mixture of fuel and oxygen encounters an external heat source with sufficient heat or thermal energy to start the combustion process is known as Piloted ignition. The correct answer is option D.

Piloted ignition is a type of ignition that happens when a mixture of fuel and oxygen encounters an external heat source with sufficient heat or thermal energy to start the combustion process. A spark is not needed for this to happen. The external heat source could be a burning cigarette, a spark from an electrical source, or any other heat source that has the ability to produce heat. When a combustible fuel is introduced into a space with air, the mixture becomes flammable when it reaches a certain concentration.

When the fuel-air mixture is heated to a high temperature, the reaction takes place and the fuel ignites. This reaction is piloted ignition. The two other types of ignition are autoignition and kinetic ignition. Autoignition is when a combustible fuel ignites spontaneously due to its high temperature and pressure. It is used in diesel engines. Kinetic ignition is when a high-velocity flame from a spark or other ignition source ignites the fuel. It is used in gasoline engines.

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Due to the relative speed of the spacecraft with regard to the observer, information sent back from the spacecraft at a rate of 1400 kHz is received at a lower rate. The rate at which information is received is reduced due to time dilation, which is the slowing of time perceived by a moving object as seen by a stationary observer. The greater the temporal dilation, the faster the item moves.

Time dilation occurs in this example because the spacecraft is travelling at 0.95 times the speed of light. This means that time appears to move slower on the spacecraft than it does to a stationary observer. As a result, the frequency of information received from the spacecraft is likewise reduced. Because of this consequence, the rate at which we get information will be lower than 1400 kHz.

Finally, the rate at which information is received is affected by the speed of a spacecraft relative to an observer. When a spacecraft travels at a substantial fraction of the speed of light, time dilation causes the spacecraft to receive information at a decreased rate.

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Introduction:

The speed of light is a fundamental constant in physics and is considered to be the highest speed at which information can travel. It is the speed at which electromagnetic radiation (including light) propagates through a vacuum. In this scenario, a spacecraft is traveling at a speed close to the speed of light, sending back information at a certain frequency.

Explanation:

According to the theory of special relativity, objects moving at high speeds experience time dilation, which means that time appears to pass more slowly for the object relative to an observer at rest. The same goes for the frequency of electromagnetic radiation. When the spacecraft is traveling at a high speed, the frequency of the electromagnetic radiation it emits will appear to be lower to an observer at rest.

This effect is known as the Doppler shift, and it affects both the frequency and wavelength of the emitted radiation. The rate at which we receive the information from the spacecraft is given by the formula:

f' = f * (√(1 - v^2/c^2))

Where f is the frequency of the radiation as emitted by the spacecraft, v is the speed of the spacecraft relative to the observer, and c is the speed of light.

In this scenario, the spacecraft is traveling at a speed of 0.95c, so v = 0.95c. Plugging these values into the formula gives us:

f' = 1400 kHz * (√(1 - (0.95c)^2/c^2)) = 1400 kHz * (√(1 - 0.9025)) = 1400 kHz * (√(0.0975)) = 1400 kHz * 0.3117 = 436.8 kHz

So, we receive the information from the spacecraft at a rate of 436.8 kHz.

Conclusion:

This example illustrates the effect of time dilation and the Doppler shift on the frequency of electromagnetic radiation as seen by an observer at rest. It shows that when a spacecraft travels at high speeds, the frequency of the radiation it emits appears to be lower to an observer at rest, due to the effect of time dilation on the frequency.

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Answer:

b. increases, decrease

Explanation:

2Ag + H₂S ⇒ Ag₂S + H₂

Ag ⇒ Ag⁺

Silver atoms loose electrons to sulfur atoms.

Answer:

Option D

Explanation:

The reaction is given by

In the reaction

silver loses two electrons to sulfur in atoms inorder to attain Ag²+ structure .

As loss of electron is oxidation it's redox reaction

Answer:

S = V t     where S is the horizontal distance traveled

1/2 g t^2 = H       where H is the vertical distance traveled

t^2 = 2 H / g

V^2 = S^2 / t^2 = S^2 g / (2 H) combining equations

tan theta = H / S

V^2 = S g / (2 tan theta)

Using S = L cos theta

V^2 = L g cos theta / (2 tan theta)

Giving V in terms of L and theta

Answer:

1500 kg is mass of car

Explanation:

F = ma

F/a = m

4500n / 3 m/s^2 = 1500 kg

The two scales have different zero points, and the Celsius degree is bigger than the Fahrenheit. However, there is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. This is -40 °C and -40 °F.

There is only one temperature that is the same whether it is expressed in the Celsius or Fahrenheit scale, and that is the temperature at which the Celsius and Fahrenheit scales intersect. This temperature is -40 degrees, and it is the point at which -40 degrees Celsius is equal to -40 degrees Fahrenheit.

To understand why this is the case, it's important to know that the Celsius and Fahrenheit scales are based on different reference points. The Celsius scale is based on the freezing and boiling points of water, with 0 degrees Celsius being the freezing point and 100 degrees Celsius being the boiling point. The Fahrenheit scale, on the other hand, is based on a mixture of ice, water, and salt, with 32 degrees Fahrenheit being the freezing point and 212 degrees Fahrenheit being the boiling point.

Because the reference points are different, the temperature at which the two scales intersect is not a round number. However, it is widely accepted that the temperature is -40 degrees, as this is the temperature at which the two scales meet. So, whether you're using Celsius or Fahrenheit, if you need to convert -40 degrees, you can be sure that the answer will be the same in either scale.

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If the observed variation in flux is due to a variation in the intrinsic luminosity of the quasar, what was the variation timescale at the time the light was emitted will be found and Rmax is equals to 1.3*10^15 cm.

In particle physics experiments the energy available for the production of new effects is the most important parameter. The required large centre of mass energy can only be provided with colliding beams where little or no energy is lost in the motion of the centre of mass system (cms).

Besides the energy the number of useful interactions (events), is important. This is especially true when rare events with a small production cross section σp are studied.

The quantity that measures the ability of a particle accelerator to produce the required number of interactions is called the luminosity and is the proportionality factor between the number of events per second dR/dt and the cross section σp.

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Answer:

dehydration

Explanation:

The MOI (mechanism of injury) that causes a fracture or dislocation at a distant point is an indirect force. This type of force is characterized by the transmission of energy through a body part, resulting in a fracture or dislocation at a different location than the impact.

An indirect force refers to a situation where a force is applied to one part of the body, but the resulting injury occurs at a distant point from the site of impact. This can happen when the force is transmitted through bones, joints, or tissues, causing them to break or become dislocated at a different location.

For example, if a person falls and lands on an outstretched hand, the impact is absorbed by the wrist joint, but the force may be transmitted to the elbow or shoulder joint, causing a fracture or dislocation at those distant points.

In contrast, a direct blow involves a force applied directly to the site of injury, such as a punch or a kick. A twisting force involves rotational movement around an axis, which can result in fractures or dislocations. High-energy injuries refer to traumatic incidents involving significant force, such as motor vehicle accidents or falls from heights, which can cause fractures or dislocations at various points depending on the specific circumstances.

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Answer:

The man has at most 1.54 seconds to get out of the way.

Explanation:

To determine the time it takes for the cement block to fall from a certain height, we can use the equation for free fall: h = (1/2)gt²

where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s²), and t is the time.

In this scenario, the height from which the cement block falls is 71.5 m - 20.0 m = 51.5 m.

By rearranging the equation and solving for t, we have: t = √(2h / g)

t = √(2 * 51.5 m / 9.8 m/s²) ≈ 3.08 s

However, the man only has to consider the time it takes for the block to fall from a height of 20.0 m, which is given by:

t' = √(2 * 20.0 m / 9.8 m/s²) ≈ 1.54 s

Therefore, the man has at most 1.54 seconds to get out of the way.

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The relationship between the length of a resonance tube and the pitch of the note it plays is that a longer tube produces a lower pitch, while a shorter tube produces a higher pitch. This is due to the way the frequency of sound waves changes with the length of the tube.

To explain further, the frequency of a sound wave is related to its wavelength and the speed of sound. When you sound a variety of resonance tubes, each tube resonates at a specific frequency, which is determined by the length of the tube. As the tube length increases, the wavelength of the sound wave increases, resulting in a lower frequency and hence, a lower pitch. Conversely, when the tube length decreases, the wavelength decreases, leading to a higher frequency and a higher pitch.

This phenomenon can be observed in musical instruments like the organ or the flute, where longer tubes produce deeper, lower-pitched sounds, and shorter tubes produce higher-pitched sounds. It is important to note that other factors, such as the material of the tube and the method of sound production, can also affect the pitch and tone of the note. However, the general relationship between tube length and pitch remains consistent across various types of resonance tubes.

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Answer:

a

Explanation:

are found in the nucleus and are locked in

Answer:

A

Explanation:

Thats what I think the answer is because protons and neutrons bond together in the nucleus.

Answer:

Part A

Please find attached the required drawing created with Microsoft Visio

Part B

1. The symbol (from a similar question) suggest the steps used to conserve resources

2. i) Reduce

ii) Reuse

iii) Recycle

Explanation:

1. The symbol suggests that in order to maintain sustainable use of our natural resources we can conserve them reducing waste, making use of reusable products, and recycling items to produce new items

2. i) The conservation step to be done first in the 3R's is Reduce

The natural resources can be conserved by reducing the amount of waste produced and also reducing the usage of non renewable natural resourced

ii) The next conservation step is to follow after it is no longer possible to reduce wastage is Reuse

There are several items that can be made use of for other purpose after they have been used including, water, bags for shopping, reusable nose masks

iii) The item which should be done last is Recycle

To recycle is to process used materials to create other items which can then be used as new items

Examples include;

Iron, Plastics, glass, paper, tires, and electronics

According to the following formula, the answer is 2,300 g or 2.3 kg:

Volume (m)/Mass (m) Equals Density (p) (V)

Here, the density is 1.15 g/mL, allowing the formula described above to result in a mass of 2.00 L:

p=m/V

1.15 g/mL is equal to x g/2.00 L or x g/2,000 mL.

2,000 mL of x g = 1.15 g of g/mL

2.3 kg or 2,300 g for x g.

Its active ingredient is glucose. This medication includes 50 g of glucose per 1000 ml (equivalent to 55 g glucose monohydrate). 50 mg of glucose is present in 1 ml (equivalent to 55 mg glucose monohydrate). A transparent, nearly colourless solution of glucose in water is what is used in glucose intravenous infusion (BP) at 5% weight-to-volume.

Patients who are dehydrated or who have low blood sugar levels get glucose intravenously. Other medications may be diluted with glucose intravenous infusion before being injected into the body. Other diseases and disorders not covered above may also be treated with it.

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Answer:

An electrical field duh

Explanation:

None needed self explanitory

Answer:

gravitational constant

Explanation:

In science, variables are factors or conditions that change or affect the outcome of a study. They can be classified into three types: independent variables, dependent variables, and controlled variables. Dependent variables are those that researchers measure to assess the impact of independent variables.

In science, variables are factors or conditions that change or affect the outcome of a study. They can be classified into three types: independent variables, dependent variables, and controlled variables. Identifying variables is critical in any research, as they enable scientists to control the study's conditions, determine cause-and-effect relationships, and achieve accurate results.
Independent variables are those that researchers manipulate to investigate their effect on the dependent variable. They are also called explanatory or predictor variables.

For instance, in a study investigating the effect of different levels of fertilizer on plant growth, the independent variable is the level of fertilizer.
Dependent variables are those that researchers measure to assess the impact of independent variables.

They are also called response variables. In the plant growth study, the dependent variable is the growth rate or size of the plants.
Controlled variables are those that researchers hold constant throughout the study to reduce the impact of extraneous factors on the outcome.

They are also called confounding or intervening variables. In the plant growth study, controlled variables include the type of plant, the amount of water, the light exposure, and the temperature.
In conclusion, identifying variables is crucial in scientific research to achieve accurate results, establish cause-and-effect relationships, and control the study's conditions. Independent, dependent, and controlled variables are the three types of variables used in scientific studies.

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Answer:

Option A - Sound waves must move through a substance

Explanation:

Unlike light waves, sound waves must travel through a medium/substance for such a medium to vibrate and then produce sound.

As a matter of fact sound can't travel through empty space.

Thus, looking at the options given, the correct one is:

Sound waves must move through a substance which is Option A

The Sun is classified as a medium-sized star, also known as a main-sequence star or a G-type star.

Stars are classified based on their characteristics such as mass, temperature, luminosity, and spectral type. The classification system for stars is called the Morgan-Keenan system, and it uses the letters O, B, A, F, G, K, and M to classify stars from hottest to coolest.

The Sun has a mass of about 1.99 x \(10^{30\) kg and a surface temperature of about 5,500 degrees Celsius. It has a luminosity of about 3.828 x \(10^{26\) watts, which is why it is often used as the reference point for luminosity.

Based on its characteristics, the Sun falls into the G-type star category, which includes stars that are similar in mass and temperature to the Sun.

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The hole is approximately 25.865 meters deep. (Using the formula: depth = 0.5 * gravity * time²)

To calculate the depth of the hole, you can use the free-fall equation, which is derived from the equation of motion: depth = 0.5 * gravity * time².

In this case, gravity is approximately 9.81 meters per second squared (m/s²) and the time taken for the stone to fall is 2.3 seconds.

Plugging these values into the equation, you get: depth = 0.5 * 9.81 * (2.3)².

By solving this equation, you find that the depth of the hole is approximately 25.865 meters.

This calculation assumes there is no air resistance acting on the stone.

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Surfactants play a crucial role in maintaining proper airflow within the lungs. They are lipoprotein compounds that coat the inner surface of the alveoli, reducing surface tension and preventing the alveoli from collapsing during exhalation.

This ensures that the lungs remain inflated and can easily expand during inhalation, facilitating efficient gas exchange.

In the absence of surfactant, the surface tension in the alveoli would be higher, making it difficult for the lungs to expand and causing the alveoli to collapse.

Consequently, this would impede airflow and reduce the lung's capacity for oxygen intake and carbon dioxide release. Surfactants, therefore, significantly affect airflow by promoting lung stability and enhancing overall respiratory function.

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In order to make an argument about the beliefs of Islam in relation to other monotheistic religions such as Christianity and Judaism, it is necessary to carry out more in-depth research on such religions to form a more consistent basis of argument.

They correspond to the principles required for practitioners of religion, which are:

Therefore, from in-depth research on Islam, Christianity, and Judaism, you can write a credible argument about how the foundations of religions are similar and faith-based, positioning your argument in religious ethics that reduces prejudice and stereotypes.

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If a car can cover n kilometers per day, it will take m/n days to cover a distance of m kilometers. This assumes that the car can cover the distance without any interruptions or delays, and that it maintains a constant speed of n kilometers per day.

The number of days it will take for a car to cover a distance of m kilometers, given that it covers a distance of n kilometers per day, is m/n.

To understand why this is the case, consider that the car covers n kilometers in one day.

Therefore, it will cover 2n kilometers in two days, 3n kilometers in three days, and so on. This means that the car will cover m kilometers in m/n days.

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The age of the cloth material is obtained from the calculation as  1843 years .

We know that the half life of a radioactive isotope refers to the time that is taken for only half of the number of the original radioactive isotopes that are present to remain in the sample.

We can be able to obtain the age of the cloth by looking at the amount of the radioactive carbon -14 that is still left in the sample. How do we do that? We have to turn to a formula that says;

0.693/\(t_{\frac{1}{2} }\) = 2.303/tlog (Ao/A)

\(t_{\frac{1}{2} }\) = half life of the material

t = age of the material

Ao = amount initially present

A = Amount present at time t

Then we have;

0.693/5730 = 2.303/tlog (Ao/0.8Ao)

1.21 * 10^-4 = 0.223/t

t = 0.223/1.21 * 10^-4

t = 1843 years

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These are the part of a constellation. Constellation is a group of stars that forms a pattern on the celestial sphere. The pattern typically represents, an inanimate object, a god, an animal, a mythological person etc.

These are related to a constellation named Ursa Major.

The big dipper is an asterism that makes up the part of Ursa Major or the great bear.

The little dipper is a part of Ursa minor or the little bear. It is usually seen at the upper right of big dipper.

This is also known as polaris.

As the time passes, with this changes the direction of sun and moon.

With all the facts stated, the stars will move from one direction to another.

So, the big dipper will also move.

It is usually seen in the North direction and are useful for the navigation.

Hence, we can say that after six hours, the big dipper will be seen to the right of Polaris; that is, 90 degrees counterclockwise from its current position.

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