On a day that a total solar eclipse is occurring, would it be visible everywhere around earth?.

Answer:

A.) Oxidation

Explanation:

:p

Hydrogen reacts with oxygen, hydrogen loses electrons. The term

applies to what happens to hydrogen in this reaction is

A. Oxidation

Oxidation is a process where a substance: Loses one or more electrons or gains an oxygen atom or we can say that oxidation is a process which involves the addition of oxygen or any electronegative element or the removal of hydrogen or any electropositive element.

Reduction is the gain of electrons or reduction is a process which involves the addition of hydrogen or any electropositive element or the removal of oxygen or any electronegative element.

A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.  

correct option is A. Oxidation

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Answer:

The amount of light that enters our eyes is controlled by two things: the size of the pupil and the iris. The pupil is the black hole in the center of your eye, and the iris is the colored part around the pupil. The iris can change the size of the pupil to control how much light gets in.

When it's dark, the iris makes the pupil bigger to let in more light so we can see better. And when it's bright, the iris makes the pupil smaller to block out some of the light so it doesn't hurt our eyes.

To see objects at different distances, the eye needs to adjust the shape of the lens. When we look at things that are far away, the lens becomes thinner and flatter. When we look at things that are close up, the lens becomes thicker and more curved. This allows the eye to focus the light on the right spot on the retina at the back of the eye.

The amount of light that enters our eyes is controlled by the size of the pupil and iris, and the shape of the lens changes to allow us to see objects at different distances.

I hope this helps! And if you could label my answer brainliest that would be awesome.

- Dante

When bulb C is unscrewed and removed from its socket, the brightness of bulbs A and B will remain the same. This is because the current flow through bulbs A and B is not affected by the removal of bulb C.

To illustrate this, imagine that bulbs A, B and C are connected in parallel.

In this case, the current flowing through each bulb is the same.

Therefore, when bulb C is removed, the current will continue to flow through bulbs A and B, and the brightness of these bulbs will remain unchanged.
To understand this further, consider the following example. Imagine that bulbs A, B and C are arranged in a single row. The current flows from bulb A to bulb B and then to bulb C. When bulb C is removed, the current will still flow from bulb A to bulb B, and the brightness of these bulbs will not be affected.
In conclusion, when bulb C is unscrewed and removed from its socket, the brightness of bulbs A and B will remain the same.

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This statement is partially true, but it is important to understand the context and implications. Electric vehicles do not produce tailpipe emissions, which means that they can reduce local air pollution in urban areas.

However, the generation of electricity to power these vehicles can still produce emissions at the point of generation, such as power plants.

The extent of this shift depends on the source of electricity generation in a given region. In areas with a high percentage of renewable energy sources, such as wind and solar, the emissions associated with electric vehicle use would be negligible. In areas that rely heavily on coal-fired power plants, the emissions associated with electric vehicle use could be significant.

It is important to note that even in areas with high emissions from electricity generation, electric vehicles still have benefits over traditional gasoline vehicles. This is because electric vehicles are more energy-efficient and produce fewer emissions overall, even when accounting for emissions from electricity generation.

In summary, while electric vehicles do shift the source of emissions from tailpipes to power plants, the overall reduction in emissions is still significant, especially in areas with a high percentage of renewable energy sources.

Therefore, the statement that electric vehicles only shift the emission of air pollutants from dispersed sources to point sources is not entirely accurate and does not fully capture the benefits of electric vehicles.

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Answer:

Point number 3.

Explanation:

Volcanism can be studied to found out evidence of the internal structure of the Earth.

Answer:

Volcanism

Explanation:

According to Maslow, the need that Mariah is trying to meet by training for months in order for her family to describe her as athletic and motivated is esteem.

In 1943, an American psychologist called Abraham Maslow classified human needs in an hierarchical order.

The hierarchy of needs are as follows:

According to this question, Mariah is trying to meet esteem needs.

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Answer:

C

Explanation:

Answer:

Explanation:For second hand, period = 1 min = 3660 s; frequency = 0.0166 Hz}\\\mbox{For minute hand, period = 1 hr = 3600 s; frequency = 2.77}\times10^{-4} Hz\\\mbox{For hour hand, period = 12 hrs = 4300 s; frequency = 2.3}\times10^{-5} Hz.

Answer:

1) Disolver azúcar en agua - Cambio químico - Es un caso de una solución en donde el solvente es el azúcar y el soluto es el agua.

2) Freir una chuleta - Cambio físico - Es un proceso de cocinado por un transferencia de calor y transferencia de masa.

3) Arrugar un papel - Cambio físico - Se aplica fuerzas externas para deformar el papel.

4) El proceso de la digestión - Cambio químico - Reducción de los alimentos a desechos y la absorción de nutrientes por el contacto con jugos gástricos o ambientes intestinales.

5) Secar la ropa al sol - Cambio físico - El secado es un fenómeno de transferencia de masa.

6) Congelar una paleta de agua - Cambio físico - Cambio del estado líquido al estado sólido por transferencia de calor.

7) Hacer un avión de papel - Cambio físico - Aplicación de fuerzas externas para plegar y doblar la hoja de papel.

8) Oxidación del cobre - Cambio químico - Proceso de corrosión por contacto con iones que se transportan en el ambiente.

9) Romper un lápiz - Cambio físico - Proceso de ruptura por esfuerzo normal a causa de un momento como consecuencia de una fuerza externa aplicada sobre el lápiz.

10) Prender fuegos artificiales - Cambio químico - Reacción química de reducción-oxidación.

11) Excavar un hoyo - Cambio físico - Remoción de tierra por trabajo físico.

12) Quemar basura - Cambio químico - Reacción de combustión.

Explanation:

A continuación, veremos que representa cada caso:

1) Disolver azúcar en agua - Cambio químico - Es un caso de una solución en donde el solvente es el azúcar y el soluto es el agua.

2) Freir una chuleta - Cambio físico - Es un proceso de cocinado por un transferencia de calor y transferencia de masa.

3) Arrugar un papel - Cambio físico - Se aplica fuerzas externas para deformar el papel.

4) El proceso de la digestión - Cambio químico - Reducción de los alimentos a desechos y la absorción de nutrientes por el contacto con jugos gástricos o ambientes intestinales.

5) Secar la ropa al sol - Cambio físico - El secado es un fenómeno de transferencia de masa.

6) Congelar una paleta de agua - Cambio físico - Cambio del estado líquido al estado sólido por transferencia de calor.

7) Hacer un avión de papel - Cambio físico - Aplicación de fuerzas externas para plegar y doblar la hoja de papel.

8) Oxidación del cobre - Cambio químico - Proceso de corrosión por contacto con iones que se transportan en el ambiente.

9) Romper un lápiz - Cambio físico - Proceso de ruptura por esfuerzo normal a causa de un momento como consecuencia de una fuerza externa aplicada sobre el lápiz.

10) Prender fuegos artificiales - Cambio químico - Reacción química de reducción-oxidación.

11) Excavar un hoyo - Cambio físico - Remoción de tierra por trabajo físico.

12) Quemar basura - Cambio químico - Reacción de combustión.

Answer:

nuclear fission

Explanation:

nuclear fission

Answer: Nuclear fission

Explanation:

The correct option is (D). The (a) lamp with less resistance and (b) lamp with greater resistance.

(A) The total resistance reduces in comparison to the resistance of each individual lamp when the lamps are connected in parallel. Compared to the bulb with greater resistance, the lamp with less resistance will draw more current and become brighter.

(b) Compared to the resistance of each individual lamp, the total resistance rises when the lamps are connected in series. In comparison to the bulb with less resistance, the lamp with greater resistance will draw more current and become brighter.

Hence, the correct option is (D). The (a) lamp with less resistance and (b) lamp with greater resistance.

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#Complete question is:

Two lamps have different resistances. (a) If the lamps are connected in parallel, which one is brighter, the lamp with greater resistance or the lamp with less resistance? (b) If the lamps are connected in series, which one is brighter? Note that the brighter lamp dissipates more power.

A. (a) lamp with greater resistance; (b) lamp with less resistance

B. (a) lamp with greater resistance; (b) lamp with greater resistance

C. (a) lamp with less resistance; (b) lamp with less resistance

D. a. lamp with less resistance; b. lamp with greater resistance

Answer:

no lol

Explanation:

Abnormal forced extension beyond normal range of motion is called hyperextension.

To elaborate more, hyperextension is the forced extension of a joint beyond its normal range of motion.

The joint is forced into a position that is not its usual range of motion due to an external force or muscular activity.

Hyperextension often causes pain and discomfort in the affected joint and surrounding muscles.

Common sites of hyperextension include the neck, fingers, and knees.

In conclusion, hyperextension refers to an abnormal forced extension of a joint beyond its normal range of motion. Hyperextension may occur due to an external force or muscle activity, and it often causes pain and discomfort.

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Explanation:

since P=W/t

P=15204/40

P=380.1 Watt

The solution is (v, u) = (- 585.709, 593,034). Please notice that the value of v only means that the direction of the real vector is antiparallel to the supposed one.

According to the definition of vector sum and vectors in rectangular form, we must solve the following vector equation:

(0, 0) = 205 · (cos 23°, - sin 23°) + v · (- cos 75°, sin 75°) + u · (- cos 55°, - sin 55°)

(0, 0) = (188.703, 80.100) + v · (- 0.259, 0.966) + u · (- 0.574, 0.819)

(- 188.703, - 80.100) =  v · (- 0.259, 0.966) + u · (- 0.574, 0.819)

Then, we must solve the following system of linear equations:

- 0.259 · v - 0.574 · u = - 188.703

0.966 · v + 0.819 · u = - 80.100

The solution is (v, u) = (- 585.709, 593,034). Please notice that the value of v only means that the direction of the real vector is antiparallel to the supposed one.

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A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity. The correct option is A.

The momentum is the product of the mass of the object and its velocity.

Mouse has mass very less than the elephant. In order to make their momentum same, the velocity of the mouse must be greater than the elephant.

Mm x Vm = Me x Ve

A mouse have the same momentum as an elephant when the mouse has a large velocity and the elephant has a small velocity.

Thus,  the correct option is A.

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Explanation:

Use Pythagorean theorem:

r² = x² + y²

r² = (-6.46 m)² + (-3.78 m)²

r = 7.48 m

Answer: 17,423 J

Explanation:

Potential Energy = mass x gravity x height

PE = 74kg x 9.81m/s^2 x 24 m

PE = 17,423 J

The required value of gravitational potential energy gained by the person is 17422.56 J.

Given data:

The lifting height is, h = 24 m.

The mass of person is, m = 74 kg.

The energy possessed by the person by virtue of its position is known as gravitational potential energy of the person. The expression for the gravitational potential energy of person is given as,

U  = mgh

Here,

g is the gravitational acceleration.

Solving as,

\(U = 74 \times 9.81 \times 24\\\\U =17422.56\;\rm J\)

Thus, we can conclude that the required value of gravitational potential energy of person is 17422.56 J.

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When you blow across the top of an open tube or pluck a tightly bound string, the lowest frequency produced is the fundamental (1st harmonic). The wavelength of the wave produced is _twice_ the length of the tube or string.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
1. When you blow across an open tube or pluck a tightly bound string, a standing wave is created.
2. The fundamental frequency (1st harmonic) is the lowest frequency that can be produced by the system.
3. For an open tube or a tightly bound string, the fundamental frequency has a wavelength that is twice the length of the tube or string.
4. This occurs because the wave must travel down the tube/string and then reflect back, creating a complete wavelength that is double the original length.

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Answer:

Distance travelled is 7 meters and the displacement is 3 meters

Answer: Because ions in an aqueous solution are free to move independently from each other. the net flow of cations toward a negative or positive electrode results in a flow of charge, which is an electrical current.

The current through the 2Ω resistor is 9.5A

The terminal voltage is 10.8 V

a) The voltage V across 8 Ω resistor is V = I*R = 8*0.5 = 4V

the current through 16Ω resistor is then I = V/R = 4/16 = 0.25 A

the current through 20Ω resistor is then I = current through 8Ω resistor + current through 16Ω resistor = 0.75 A

voltage across 20Ω is V = I*R = 0.75*20 = 15 V

the source voltage is Vs = V8 + V20 = 4+15 = 19 V

therefore the current through 2Ω resistor is

I = V/R = 19/2 = 9.5 A

b) The terminal voltage is

Vterminal = VR = I*R = 0.450*24 = 10.8 V

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The mass of carbon monoxide present in the room is approximately 0.067 grams.

To calculate the mass of carbon monoxide in the room, we need to convert the volume of the room from cubic feet (ft^3) to cubic meters (m^3) and then multiply it by the concentration of carbon monoxide.

Given:

Concentration of carbon monoxide = 48 micrograms/m^3

Room dimensions: 10.6 ft x 14.8 ft x 20.5 ft

First, we convert the room volume from cubic feet to cubic meters:

Volume = (10.6 ft) * (14.8 ft) * (20.5 ft) = 3201.16 ft^3

1 ft^3 is approximately equal to 0.02832 m^3. So, converting the volume:

Volume = 3201.16 ft^3 * 0.02832 m^3/ft^3 ≈ 90.71 m^3

Next, we calculate the mass of carbon monoxide:

Mass = Concentration * Volume

Mass = 48 micrograms/m^3 * 90.71 m^3

Converting micrograms to grams:

Mass = (48 micrograms/m^3 * 90.71 m^3) / (10^6 micrograms/gram) ≈ 0.00436 grams

Rounding to three significant figures, the mass of carbon monoxide present in the room is approximately 0.067 grams.

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There are two major types of problem-solving reflective and creative.

The process is used to help students think about a problem without applying their own preconceived ideas. Defining what the problem looks like is separated from looking at the cause of the problem to prevent premature judgment.

Reflective Problem Solving follows a series of tasks. Once you have broken the students into groups, the students define the problem, analyze the problem, establish the criteria for evaluating solutions, propose solutions and take action.

Creative Problem Solving uses the same basic focus, but the process is less geared toward solutions and more towards a focus on brainstorming. The focus is on creating ideas rather than solving a clear existing problem.

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The theoretical efficiency is greater than that of the actual efficiency of the engine. This is because heat engine always produces some waste heat.

The Second Law of Thermodynamics states that a heat engine cannot be 100% efficient. In practice, a heat engine is only 100% efficient when it is operating at about 30-50% efficiency.

If we were to multiply this by 100, we would get the efficiency as a percent: 49%. This is the theoretical maximum efficiency. If we were to actually build an engine, it would be less efficient than the theoretical engine. The theoretical engine that can achieve this theoretical maximum efficiency is called the Carnot Engine.

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The motion of a mass moving in a horizontal circular path with constant speed v is called uniform circular motion. In uniform circular motion, the object moves in a circular path at a constant speed, but its velocity constantly changes direction.

In uniform circular motion, the centripetal force, directed toward the center of the circle, keeps the mass moving in the circular path. This force is necessary to constantly change the direction of the velocity vector, even though the speed remains constant. The centripetal force is provided by a force or a combination of forces acting on the mass, such as tension in a string, gravitational force, or friction. Without this inward force, the mass would move in a straight line tangent to the circle.

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The velocity of water through the firehose is inversely proportional to the square of its diameter. Hence, when diameter changes from 7.5 cm to 2.3 cm, velocity increases from 4 to 42.5 m/s.

The velocity of water through a firehose is inversely proportional to the area of a firehose. Hence, as the area increases, velocity decreases.

A1 V1 = A2 V2

A = πr²

  =  πd²/4.

Then D1² v1 =  D2² v1

Given d1 = 7.5 cm

d2 = 2.3 cm

v1 = 4 m/s

then v2 = D1² v1 / D2²

V2 = (7.5 cm)² × 4 m/s / (2.3 cm)² = 42.5 m/s

Therefore, the velocity of water increases to 42.5 m/s.

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Answer:

13.4225 g/cm³

Explanation:

Given that:

Linear expansivity α = 2 * 10^-5

Change in temperature dt = t2 - t1 = (150 - 25)°c = 125°c

Initial density (d1) = 13

New density d2 =?

Using the relation :

α = (d2 - d1) / d1 * dt

d2 - d1 = d1 * dt * α

d2 = d1 + d1*dt*α

d2 = d1(1 + d1*dt*α)

d2 = 13( 1 + (13*125*2*10^-5))

d2 = 13(1 + 0.0325)

d2 = 13(1.0325)

d2 = 13.4225

d2 = 13.4225 g/cm³