Atoms are known to form charges due to their ability to gain and lose electrons in reactions. As a result, atoms
become ions that are positively or negatively charged depending on the loss or gain of electrons. Which of the
following atoms has a charge of +2 given the number of electrons?
O A. O: 10 electrons
OB. N: 10 electrons
O C. Fe: 24 electrons
OD. Cl: 18 electrons

The amount of electric charge passing through the starter motor is 17.85 C.

Current = 21.0 A, Diameter of the wire (d) = 4.00 mm = 4.00 × 10⁻³ m, Length of the wire (l) = 1.49 m, Time taken (t) = 0.85 s

We know that the electric charge passing through the starter motor is given by,

Charge (Q) = Current × Time Taken (t)

So, we have

Charge = 21.0 A × 0.85 s

Charge = 17.85 C

Now, we need to find the resistance of the copper wire,Resistance (R) = resistivity × length / Area of cross section (A)

From the formula of the area of cross section of a circle,A = πd²/4∴

A = π × (4.00 × 10⁻³ m)²/4

A = 1.26 × 10⁻⁵ m²

We have to use the resistivity of copper, ρ = 1.72 × 10⁻⁸ Ω m

Resistance = (1.72 × 10⁻⁸ Ω m × 1.49 m) / (1.26 × 10⁻⁵ m²)

Resistance = 2.04 × 10⁻³ Ω

The amount of electric charge passing through the starter motor is 17.85 C.

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The coating is designed to reflect more of the longer wavelengths of light (such as red and green) and less of the shorter wavelengths (such as blue and violet), resulting in a net blue tint.

The blue tint of a coated camera lens is largely caused by the interference of light waves. The coating on the lens is designed to reduce reflections and increase the amount of light that passes through the lens to the camera sensor. The coating consists of layers of material with different refractive indices, which causes some of the light that enters the lens to be reflected back out at the surface of the coating.

When two or more waves of light interfere with each other, their amplitudes add together. If the waves are out of phase (i.e., their peaks and troughs are not aligned), they will cancel each other out, resulting in a reduction in the overall intensity of the light. This is called destructive interference.

In the case of a coated camera lens, the light waves that are reflected from the different layers of the coating can interfere with each other. If the thickness of the coating is such that the reflected waves are out of phase, they will interfere destructively with each other, causing some wavelengths of light to be cancelled out more than others. This results in a tint or color cast in the light that passes through the lens. In the case of a blue tint, this means that the coating is designed to reflect more of the longer wavelengths of light (such as red and green) and less of the shorter wavelengths (such as blue and violet), resulting in a net blue tint.

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Answer:

The correct option is;

Industrial organizational psychologist

Explanation:

Industrial organizational psychology is a branch of the study of psychology that looks into the application of psychological principles and theories in industrial and organizational settings.

An industrial organizational psychologist provide support to organizations such analyzing orientation and behavior, assessment of the organization, training company personnel on how to be or become a good leader, design and development of organizational products , analysis of customer choices, the satisfaction of the customers, and the strategy the organization follows in marketing of their products such as to increase awareness and understanding of human behavior in a workplace setting.

The friction between the b;ock and surface is given by mass and accelerartion.

Force = mass * acceleration

Answer:

The change in speed on slopes is due to gravity. When going downhill, objects will accelerate (go faster), and when going uphill they will decelerate (slow down). On a flat surface, assuming that there is little friction, they will then maintain a constant speed.

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The statement (a) "Electrons are in the nucleus" is not correct. Electrons are not located within the nucleus of an atom. Electrons are negatively charged particles that exist in specific energy levels or electron shells surrounding the nucleus.

These electron shells or orbitals are regions of space where electrons are most likely to be found, but they are distinct from the nucleus itself.

The nucleus, on the other hand, is situated at the center of an atom and is composed of protons and neutrons. Protons carry a positive charge, while neutrons are neutral. Protons and neutrons are collectively referred to as nucleons and are contained within the nucleus.

Understanding the distribution of electrons and nucleons within an atom is fundamental to comprehending the structure and behavior of atoms and their interactions in chemistry and physics.

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The new position of the sailboat is 57 m northeast. hence option 3 is correct.

The right-angled triangle's hypotenuse's square length is equal to the sum of the squares of the lengths of the other two sides, according to the Pythagoras theorem, often known as the Pythagorean theorem. Alternatively, the square of the hypotenuse of a right triangle is equal to the sum of the squares of its two legs.

Given that the boat sails 40 meters north, followed by 40 meters of straight eastward motion. The Pythagorean Theorem will be used to determine the new position.

P^2 = 40^2 + 40^2

P^2 = 1600 + 1600

P^2 = 3200

Square root of P (3200)

P = 56.6 m P = 57 m (approximately)

Consequently, the sailboat will now be 57 north east.

The complete question is- A sailboat on a lake sails 40. meters north and then sail 40. meters due east. Compared to its starting position, the new position of the sailboat is

(1) 40. m due east (3) 57 m northeast

(2) 40. m due north (4) 80. m northeast

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1. Work (W) is defined as the dot product of the force vector (F) and the displacement vector (d), or W = F•d.

2. The correct answer is (b) No, because it is always perpendicular to the displacement.

The student question has two parts: the effect of doubling the speed on the centripetal force, and whether the centripetal force does any work on the object.

1. To analyze the effect of doubling the speed on the centripetal force, we can use the formula for centripetal force:

Fc = \(mv^2/r,\)

where m is the mass of the object,

v is its speed, and r is the radius of the curve.

If we double the speed (v), the formula becomes \(Fc = m(2v)^2/r\)

\(= 4mv^2/r.\)

Comparing this to the original formula, we can see that the centripetal force increases by a factor of 4.

Therefore, the correct answer is (d) It goes up by a factor of 4.
2. To determine if the centripetal force does any work on the object, we need to consider the relationship between force, displacement, and work.

Work (W) is defined as the dot product of the force vector (F) and the displacement vector (d), or W = F•d.

In the case of centripetal force, the force is always perpendicular to the displacement vector.

When two vectors are perpendicular, their dot product is zero, meaning that the work done by the centripetal force is zero.

Therefore, the correct answer is (b) No, because it is always perpendicular to the displacement.
In summary, when the speed of an object moving on a curve of radius r is doubled, the required centripetal force goes up by a factor of 4.

Additionally, the centripetal force does not do any work on the object, as it is always perpendicular to the displacement.

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Answer:

A

Explanation:

Use the conservation of energy formula to calculate the velocity of the ball when it reaches the halfway point (10m down). Then, use your calculated value to obtain the kinetic energy.

Answer:

A. 49 on Plato

Explanation:

Its the right one trust me .

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c. take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface

A. Fluid Friction B. Yes, there is more mass on the boat.

Explanation:

Not very sure about B but goodluck.

Answer:

The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as, the upper level, below which the ground is saturated.

Answer:

No Density does not depend on the amount of substance you have because density is the ratio of mass and volume in an object

Explanation:

ROCK AND ROLL!!

~Monty

Answer:

с

creates its own light, which is blocked by the Sun during an eclipse.

Explanation:

might not be right but its what i remember

Answer:

Explanation:

The communicator

The energy the earth receives from the sun in one hour is enough energy to meet worldwide demand for a year

It is possible to change the form of energy. For instance, the body of a person can store chemical energy from food until that person uses it as kinetic energy during labor or play. The kinetic energy of moving water in rivers and the chemical energy held in coal and natural gas can be turned to electrical energy, which can then be transferred to light and heat.

In terms of working energy, these can be classified into two categories:

potential or reserve power

working force or kinetic energy

Energy is the potential for doing labour. Modern civilisation is made possible by the capacity to convert energy between different forms and use it to complete activities. People use energy to move around on foot and by bicycle, operate cars on land and in the sea, cook food on stoves, make ice in freezers, light up our homes and offices, make things, and send people into space.

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Answer:

i don’t know what kind of waves you mean but if you’re talking about sound waves...

Explanation:

“Sound waves are transmitted through solids, liquids, and gases. Light waves are transmitted through transparent materials (may be clear or colored material such as filters) that allow most of the light that strikes them to pass through them. Only a small amount of light is reflected or absorbed.”

The waveform given below indicates a square waveform with a period of 10 ms and a frequency of 100 Hz. Waveforms of this type are commonly used in power electronics circuits.

A power electronic circuit is a circuit that is responsible for managing the power of an electrical system. They are commonly used in various devices such as electric vehicles, inverters, and power supplies. Power electronics have various advantages such as improved energy efficiency, reduced emissions, and reduced weight/power requirements.\

The above waveform represents a square wave with a period of 10 ms and a frequency of 100 Hz. This waveform is used to convert DC voltage into AC voltage using pulse-width modulation. In this method, the width of the square wave is varied to control the output voltage.

A high output voltage corresponds to a wide pulse, while a low output voltage corresponds to a narrow pulse. This method is used to create an AC waveform of variable frequency and amplitude.

Finally, power electronics have numerous applications in various industries, and they play an essential role in managing the power in electrical systems.

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Answer:

Limiting the use of fossil fuels such as oil, carbon and natural gas and replacing them with renewable and cleaner sources of energy, all while increasing energy efficiency

Explanation:

Answer:

Read the explanations ●

Explanation:

Electric power is the rate which energy is transformed to or from a part of an electrical circuit. A battery can deliver energy or a circuit element , the power is equal to the voltage difference across the element multiplied but the current...

Answer:

See explanation below -

Explanation:

Electrical power is, by definition, the rate at which electrical energy is absorbed in a circuit. However, we are asked the electrical power with respect to current.

This is a perfect example of Ohm's law, or the formula of power. It defines the relationship between power, voltage and current, as such -

P = VI

As you can see, electrical power is directly proportional to the current.

Now the potential difference is also recognized as the voltage, and is similarly directly proportional to the electrical power.

Hope that helps!

Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.

Answer: Velocity = v = 35 m/s

Explanation:

Kinetic energy of an object is defined as the energy possess by an object due to its motion. Kinetic energy K.E of an object is equal to the half of the mass of that object multiplied by square of the object's velocity.

Mathematically,

v = 35 m/s

In a 1 m3 tank containing air at 25°C and 500 k Pa is connected through a valve to another tank containing 4 kg of air at 60°C and 200 k Pa.The final pressure is 284.23 k Pa and the heat transfer is -1242 J.

The initial state of the air in tank A is:

   Mass: m1 = 1 m3 / (257.14 m3/kg) = 0.039 kg

   Temperature: T1 = 25°C = 298.15 K

   Pressure: P1 = 500 k Pa

The initial state of the air in tank B is:

   Mass: m2 = 4 kg

   Temperature: T2 = 60°C = 333.15 K

   Pressure: P2 = 200 k Pa

The final state of the air is:

   Mass: m = m1 + m2 = 4.039 kg

   Temperature: T = 20°C = 293.15 K

The specific heat of air at 25°C is c = 1010 J/kg/K.

The heat transfer is Q = mC(T_f - T_i) = 4.039 kg * 1010 J/kg/K * (293.15 K - 298.15 K) = -1242 J

The final pressure is P_f = P_1 * m_1 / m + P_2 * m_2 / m = 500 k Pa * 0.039 kg / 4.039 kg + 200 k Pa * 4 kg / 4.039 kg = 284.23 k Pa

Therefore, the final pressure is 284.23 k Pa and the heat transfer is -1242 J.

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In a 1000BASE-LX network, the type of fiber-optic cable that is commonly used is a single-mode fiber-optic cable. This type of cable has a small core diameter of around 9 microns and is designed to carry light over long distances with minimal signal loss.

The use of single-mode fiber-optic cable in a 1000BASE-LX network ensures high-speed data transmission over longer distances, up to 10 kilometers, while maintaining a reliable and secure connection.

Single-mode fiber-optic cable has a higher bandwidth and faster data transfer rate than multimode fiber-optic cable, which makes it an ideal choice for long-distance network connections. In addition, it is also less susceptible to signal distortion and interference caused by environmental factors such as temperature and electromagnetic interference.

Overall, the use of single-mode fiber-optic cable in a 1000BASE-LX network provides a fast, reliable, and secure network connection for businesses and organizations that require high-speed data transfer over long distances.

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

m is the mass in kg

v is the velocity in m/s

From the question

m = 1500 kg

v = 35 m/s

We have

\(k = \frac{1}{2} \times 1500 \times {35}^{2} \\ = 750 \times 1225 \\ = 918750\)

We have the final answer as

Hope this helps you

According to the research, scientific methods are said to involve critical thinking since it seeks to establish the explanation of a phenomenon based on what is previously known, analyzing and evaluating the information.

It is the ability to collect that consists of analyzing and evaluating the consistency of existing information regarding a given topic or issue, trying to clarify the veracity of said information and reach a justified idea in this regard, ignoring possible external biases.

Scientific methods are based on concrete and verifiable facts, and not on beliefs or opinions, being the responsibility of the scientist or researcher to maintain their critical thinking in the research, that is, the constant questioning of information and conclusions.

Therefore, we can conclude that according to the research, scientific methods are said to involve critical thinking since it seeks to establish the explanation of a phenomenon based on what is previously known, analyzing and evaluating the information.

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The balanced reaction of combustion of a fuel is 6H2O + 4CO2 = 2C2H6 + 7O2 which produces oxygen.

Combustion is a chemical reaction during which a fuel is oxidized and a large quantity of energy is released. The oxidizer is often air. Fuel: any material that can be burned to release thermal energy. Most familiar fuels are hydrocarbons and are denoted by the general formula of CnHm. For example octane is C8H18.

A combustion process is complete if all the carbon in the fuel burns to CO2, all the hydrogen burns to H2O, and all the sulfur (if any) burns to SO2. That is, all the combustible components of a fuel are burned to completion during a complete combustion process.

In actual combustion processes, it is common practice to use more air than the stoichiometric amount to increase the chances of complete combustion or to control the temperature of the combustion chamber. The amount of air in excess of the stoichiometric amount is called excess air.

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Balanced reaction of combustion of a energy is 6H2O 4CO2 = 2C2H6 7O2 which produces oxygen.

Combustion can be defined as a chemical response in which which a energy is oxidized and a large volume of energy is released. The oxidizer is frequently air. Energy any material that can be burned to release thermal energy. utmost familiar energies are hydrocarbons and are denoted by the general formula of CnHm. For illustration octane is C8H18.

A combustion process is complete if all the carbon in the energy burns to CO2, all the hydrogen burns to H2O, and all the sulfur( if any) burns to SO2. That is, all the combustive factors of a energy are burned to completion during a complete combustion process.

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Answer: A.

current (thumb) to magnetic field (fingers)

Answer:

A. current (thumb) to magnetic field (fingers)

Explanation:

According to the Right-Hand Thumb rule, if we are holding a current- carrying straight conductor in our right hand such that the thumb points toward the direction of current, then the fingers will wrap around the conductor in the direction of the field lines of the magnetic field.

Hope it helps.

If you have any query, feel free to ask.

Answer:

after 10 seconds,  the car reaches 30m/s and travels 200 m

Explanation:

final velocity = initial velocity + acceleration • time

30 m/s = 10 m/s + 2 m/s/s • time

subtract 10m/s from both sides

20 m/s = 2m/s/s • time

divide each side by 2m/s

10 s = time

d = 1/2 acceleration • time^2 + initial velocity • time

d = 1/2 • 2m/s/s • 10s^2 + 10m/s • 10s

d = 1 • 100m  + 100m

d = 200m