what two elements are highlighted on group 3 of the periodic table​

When the V filter is used, the color that is detected is green. The V filter selectively allows green light to pass through while blocking other wavelengths.

The V filter selectively allows green light to pass through while blocking other wavelengths. Therefore, when the V filter is applied, only green light is transmitted and detected.

Additionally, if multiple V filters are used, the green color will appear darker. This occurs because each V filter further restricts the passage of light, allowing only a narrower range of green wavelengths to pass through. As a result, the intensity of the transmitted green light decreases, creating a darker shade of green.

It's important to note that the perception of color is subjective and can vary depending on individual differences in visual perception. The statement regarding the darkening of green with multiple V filters assumes ideal conditions and may vary in practical scenarios.

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We are given the following information

Mass of car = 950 kg

Initial speed of car = 16.0 m/s

Final speed of car = 9.50 m/s

Time = 1.20 s

The average force exerted on the car during braking can be found using Newton's 2nd law of motion

Where m is the mass of the car and a is the acceleration of the car.

The acceleration of the car is given by

The negative sign indicates deacceleration since the car is stopping.

So, the force is

Therefore, an average force of 5145.865 N was exerted on your car during braking.

The distance traveled by the car while braking can be found as

Let us substitute the given values

Therefore, the car traveled a distance of 15.3 m while braking.

The equivalent resistance of the series circuit is \(6\Omega\).

The equivalent resistance of the parallel circuit is \(14\Omega\).

The parallel circuit has a higher equivalent resistance.

Equivalent resistance represents the total resistance that an ideal resistor would have if it were connected in place of the entire circuit.

The equivalent resistance can be found for a series circuit by simply adding the given resistances. Hence, if the resistances connected in a series are \(R_1, R_2, R_3,......, R_n\) then the equivalent resistance can be given by,

\(R_S=R_1+R_2+R_3+......+R_n\).

The given resistances connected in series are \(2 \Omega\) and \(4 \Omega\). Therefore, the equivalent resistance of the series circuit can be given by,

\(R_S=(2+4)\Omega\\\Rightarrow R_S=6 \Omega\)

The equivalent resistance of the series circuit is \(6\Omega\).

The reciprocal of the equivalent resistance of a parallel circuit can be found by adding the reciprocal of the given resistances. Hence, if the resistances connected in parallel are \(R_1, R_2, R_3,......, R_n\) then the equivalent resistance can be given by,

\(\frac{1}{R_P}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+.....+\frac{1}{R_n}\).

The given resistances connected in parallel are \(21 \Omega\) and \(42 \Omega\). Therefore, the equivalent resistance of the series circuit can be given by,

\(\frac{1}{R_P}=\frac{1}{21}+\frac{1}{42}\\\Rightarrow \frac{1}{R_P}=\frac{2+1}{42}\\\Rightarrow \frac{1}{R_P}=\frac{3}{42}\\\Rightarrow \frac{1}{R_P}=\frac{1}{14}\\\Rightarrow R_P=14 \Omega\)

The equivalent resistance of the parallel circuit is \(14\Omega\).

So, the parallel circuit has a higher equivalent resistance.

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Answer:

5476.86 °F

Explanation:

Temp (F) + 273.15 = Temp (K)

Temp (F) + 273.15 = 5750 K

5750 K - 273.15 = 5476.85 °F

In the context of thermodynamics, a control volume refers to an arbitrary region in space used to analyze the flow and energy transfer within a system. The condenser is a component commonly found in thermal systems, such as refrigeration or power plants, where it is responsible for transferring heat from a working fluid to a cooling medium.

When considering the energy balance for the control volume enclosing the condenser, several factors come into play. The energy balance equation for this scenario focuses on the energy input and output within the control volume. In the case of the condenser, the energy balance equation can be simplified because the condenser typically operates at a nearly constant pressure. This simplification allows us to neglect the changes in kinetic and potential energy terms.The energy balance equation for the condenser reduces to a simpler form where the energy input is equal to the energy output. This means that the heat absorbed by the condenser from the working fluid, which is usually in the form of latent heat, is equal to the heat rejected by the condenser to the cooling medium.

This simplified energy balance equation helps us analyze and optimize the performance of the condenser in terms of heat transfer efficiency and thermal management within the system. In summary, for the control volume enclosing the condenser, the energy balance reduces to a simplified equation where the energy input is equal to the energy output, considering the nearly constant pressure operation. This simplification allows for a focused analysis of the heat transfer processes occurring within the condenser.

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The nucleus n,mX is 17,8X. Based on the atomic number (m = 8), the element is oxygen. Therefore, the nucleus is 17,8O (oxygen-17). The nuclear reaction is 14,7N + 4,2He = 17,8O + 1,1H.

In the given nuclear reaction:
14,7N (nitrogen-14) + 4,2He (helium-4) = n,mX + 1,1H (hydrogen-1)

First, let's analyze the conservation of mass and atomic numbers in the nuclear reaction. To do this, we add the mass numbers (the top numbers) and the atomic numbers (the bottom numbers) on each side of the equation.

Mass numbers:
14 (N) + 4 (He) = n (X) + 1 (H)
18 = n + 1

Atomic numbers:
7 (N) + 2 (He) = m (X) + 1 (H)
9 = m + 1

Now, we can solve for n and m:
n = 18 - 1 = 17
m = 9 - 1 = 8

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Answer:

D) one complete wavelength to pass a fixed point.

Explanation:

Multimeter conducts like a big resistor. Since current will be very low due to the very high resistance, the circuit's overall current won't be impacted in the slightest. It will transmit the appropriate voltage

A passive electrical device known as a resistor adds resistance to the flow of electric current. They can be discovered in virtually all electrical networks and electronic circuits. One ampere of current (A) and a one volt (V) drop across a resistor's terminals produce an ohm, which is the resistance that results. The voltage at the terminal ends determines the current in a direct proportion. Ohm's law demonstrates how to calculate this ratio. Multiple applications exist for resistors. Among some examples are voltage division, heat generation, matching and loading circuits, current limiters for electric current, gain control, and time constant setting. With resistance values spanning a range of more than nine orders of magnitude, they are readily available on the market. Units of resister is omhs.In the International System of Units, the ohms serves as the reference unit for electrical resistance.

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Answer:

β 2 = 0.02575 mm

Explanation:

given data

wavelength = 563 nm

separation distance between adjacent bright fringes =  0.0290 mm

wavelength = 500 nm

solution

we get here separation distance between adjacent bright fringes that is express as

β = \(\frac{\lambda D }{d}\)    ..................................1

here D is distance from plane of slit to screen

and d is slit sepation that is constant

so

\(\frac{\beta 1}{\beta 2} = \frac{\lambda 1}{\lambda 2}\)  

β 2 = \(\frac{500}{563} \times 0.0290\)  

β 2 = 0.02575 mm

Answer:

\(\huge\boxed{\sf F = 14.52\ N}\)

Explanation:

Mass = m = 3,630 g = 3.63 kg

Acceleration = a = 4 m/s²

Force = F = ?

F = ma

Put the given data in the above formula.

F = (3.63)(4)

\(\rule[225]{225}{2}\)

The answer cannot be determined because the wavelength of Mars' peak radiation is not provided in the question. Therefore, we cannot calculate the temperature, frequency, or energy content of the photon.

To determine the temperature of Mars based on its peak wavelength of radiation, we can use Wien's law.

(a) Wien's law states that the wavelength of peak radiation is inversely proportional to the temperature of the object. The equation is: λ_max = (b / T), where λ_max is the peak wavelength, b is Wien's constant (2.898 × 10^-3 m·K), and T is the temperature in Kelvin.

Rearranging the equation, we have T = (b / λ_max). By substituting the given peak wavelength, we can calculate the temperature. However, the value of the peak wavelength is not provided in your question, so we cannot determine the temperature.

(b) To find the frequency of a photon at the given wavelength, we can use the equation c = λν, where c is the speed of light (3 × 10^8 m/s), λ is the wavelength, and ν is the frequency.

By rearranging the equation, we have ν = (c / λ). Again, the wavelength is not provided, so we cannot calculate the frequency or energy content of the photon.

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The kinetic energy needed to overcome the coulomb repulsion between the two nuclei is 3.85 x 10⁻¹³ J and  the gas is to be heated to a temperature of 5.57 x 10¹⁰ K initiate the reaction.

The deuterium-tritium fusion reaction is,

D + T → He + n + 17.59 MeV

where D is deuterium, T is tritium, He is helium, n is a neutron, and 17.59 MeV is the energy released in the reaction.

E = (kq₁q₂)/r, Coulomb's constant (8.987 x 10⁹ Nm²/C²) is k, the charges of the two nuclei (which are both positive, since they are protons) are q₁ and q₂, distance between the nuclei is r. Plugging these values into the formula, we get,

E = (8.987 x 10⁹ Nm²/C²)(1C)(1C)/(2.3 x 10⁻¹⁵m)

E = 3.85 x 10⁻¹³ J

The exact temperature needed to achieve this depends on the distribution of kinetic energies in the gas, but we can use the formula,

T = (2*E)/k_B

where T is the temperature in Kelvin, E is the energy needed to initiate the reaction, and k_B is the Boltzmann constant (1.38 x 10⁻²³ J/K). Plugging in the value of E that we calculated, we get,

T = (2*3.85 x 10⁻¹³ J) / (1.38 x 10⁻²³ J/K)

T = 5.57 x 10¹⁰ K

This temperature is extremely high and is not achievable in most laboratory conditions. However, in the core of the sun and other stars, temperatures and pressures are high enough to sustain nuclear fusion reactions.

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A wheel undergoing rolling motion means that the wheel is moving forward while rotating on its axis. The motion of the wheel can be analyzed using the concept of rotational motion and translational motion.

One of the fundamental truths about a wheel undergoing rolling motion is that the point of contact between the wheel and the surface is stationary. This means that the wheel's velocity at the point of contact is zero, and this is true for any point on the wheel's circumference that is in contact with the surface.
Another truth about a wheel undergoing rolling motion is that it has less friction than a sliding object. This is because the rolling motion allows the wheel to distribute its weight over a larger area, reducing the pressure on any particular point of contact between the wheel and the surface. Additionally, the shape of the wheel allows it to change direction easily, making it an excellent tool for transportation and movement.
In summary, a wheel undergoing rolling motion has a stationary point of contact with the surface, less friction than a sliding object, and is an excellent tool for transportation and movement.

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Answer:

1. Government Agencies

2. Television Stations

Explanation:

Weather reports are needed by members of the public to be alert on daily and future weather trends as this would affect how they arrange their affairs. The weather can affect daily movement. For example, when it rains heavily, movement might become limited. Government agencies such as the National Weather Service (NWS), state the weather report.

Television channels like the Cable News Network have programs dedicated to weather reporting. The reporter states what the weather would be like in different cities and the public take note of that.

The angular velocity of a planet can be calculated by dividing 2π radians by the time it takes for the planet to complete one orbit around the Sun. The linear velocity of a planet can be calculated by multiplying the planet's angular velocity by its average distance from the Sun.

Angular velocity refers to the rate at which an object moves around a central point. In the case of a planet orbiting the Sun, the central point is the Sun itself. To calculate the angular velocity of a planet, we divide the angle traveled by the planet in one orbit by the time it takes to complete that orbit. Since a full circle is 2π radians, the angular velocity can be calculated by dividing 2π by the orbital period of the planet.

On the other hand, linear velocity refers to the speed at which an object moves in a straight line. In the context of a planet's orbit, the linear velocity can be derived from the angular velocity. By multiplying the angular velocity of the planet by its average distance from the Sun, we can determine the linear velocity of the planet in its orbit.

By calculating both the angular and linear velocities of a planet, we can gain insights into its motion and speed within the solar system. These calculations allow us to better understand the dynamics of planetary orbits and the forces that govern them.

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Answer:

metal conducts heat faster than wood. which means the metal conducted heat away from your hand (or whatever it is) faster than wood.

Explanation:

just because they feel warm/cold doesn't always mean that it is warm/cold. if they both were sitting at room temp for a long time, then both will eventually reach the temp of the room. even though they are the same temp the metal will feel colder than the wood because of the thermal conductivity of the metal compared to the wood.

The different thermal conductivities of metal and plastic are important in the design of the bowl is metal conducts heat faster than Plastic. which means the metal conducted heat away from your hand (or whatever it is) faster than Plastic.

Thermal conductivity can be defined as the degree to which heat is transmitted through the cross-section of the unit of an object, where the temperature exits directly across the surface.

Electrical conductivity is a measure of how much energy (moving charge) can pass through objects under the influence of a used electric field. Thermal conductivity measures how heat (heat moving energy) can pass through objects below temperature differences.

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Answer:

you are going 1 mile per hour depending on how fast

Explanation:

Compared with the sister's clock, she will notice that your clock runs slower. The conclusion can be derived from the Theory of Special Relativity.

The Theory of Special Relativity explains how the speed affects mass, time, and space.

The time slows down for observers moving relatively to each other approaching the speed of light. This is called time dilation.

The first observer will find the second observer's clock runs slower than the first observer's. At the same time, the second observer will find the first observer's clock runs slower than the second observer's.

The time dilation can be expressed as

\(\frac{t_{o} }{t} = \sqrt{(1 - \frac{v^{2} }{c^{2}} )}\)

Where

You and your sister travel at different speeds in space and you note that her clock runs slower. At the same time, compared with her clock, your sister will note that your clock runs slower by the same factor of

\(\sqrt{(1 - \frac{v^{2} }{c^{2}} )}\)

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Answer:

applied force since she is pushing the box

maybe, I'm not 100% sure

The apparent magnitude of the stars cannot be determined without knowing their absolute magnitudes.

If a star were 1000 pc (parsecs) away, its distance modulus would be 10. The distance modulus is a measure of the difference between the star's apparent magnitude (m) and its absolute magnitude (M), and it can be calculated using the formula:

Distance Modulus = m - M

In this case, we know that the distance modulus is 10, so we can write the equation as:

10 = m - M

To find the apparent magnitude (m) of each of the following stars, we need to know their absolute magnitudes (M). The absolute magnitude is a measure of the star's intrinsic brightness, and it is typically given for reference stars. Without knowing the absolute magnitudes of the stars, we cannot determine their apparent magnitudes.

Therefore, we need additional information, such as the absolute magnitudes of the stars, to calculate their apparent magnitudes. Without this information, we cannot provide a specific answer to the question.

The apparent magnitude of the stars cannot be determined without knowing their absolute magnitudes.

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However, it is around 93 million miles on average between Earth and the sun (150 million kilometers). This distance is also known as one astronomical unit by scientists (AU)

What does the term "astronomical" mean?

Astronomical: Extremely or unbelievable huge; of or connected to astronomy. The price was exorbitant. astronomically

What does astronomy mean exactly?

Like the other disciplines, astronomy too began as a -ology, although it was termed astrology. Astro-, which naturally meaning "star," is a prefix that both astrological and astronomy share. "Knowledge" or "science" are denoted by the prefix -ology.

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The pendulum's new time period is 2.99541 seconds. It takes at least 4 digits after the decimal to detect changes because the period is proportional to the square root of the acceleration due to gravity.

Simple pendulums have a period that is inversely proportional to the square root of the acceleration brought on by gravity at that particular location. As a result, the simple pendulum's time period will shorten if the acceleration caused by gravity increases, whereas it will lengthen if it decreases.

T = 2Lg is the time period used in the simple pendulum derivation. where T = 2 L g  ‘L’ = the length of the string T = Time period in seconds ‘g’ = the acceleration owing to gravity (9.8 m/s² on Earth).

Assuming the motion of a simple pendulum, the time period is given by

⇒ T = 2π√(L/g)

⇒ T₁/T₂ = √(g₂/g₁)

The values we have

T₁ = 3 s

g₁ = 9.79 m/s²

g₂ = 9.82 m/s²

Solving

T₂ = T₁/√(g₂/g₁)

T₂ = 3/√(9.82/9.79)

T₂ = 2.99541 seconds

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To find the value of 2x - 2y, we substitute the given values of x and y into the expression.

x = 10.0 ± 0.1

y = 10.0 ± 0.1

Substituting these values into 2x - 2y:

2x - 2y = 2(10.0 ± 0.1) - 2(10.0 ± 0.1)

= 20.0 ± 0.2 - 20.0 ± 0.2

= 20.0 - 0.2 ± 0.2 - 20.0 - 0.2 ± 0.2

= 0.0 ± 0.2

Therefore, 2x - 2y is equal to (0.0 ± 0.2), which corresponds to option (1) (0.0 ± 0.1).

Answer:

no idea need help too I kinda understand it

Answer:

4-The brain's ability to for new brain cells and make new connections throughout life

EXPLANATION:

neuroplasticity, capacity of neurons and neural networks in the brain to change their connections and behaviour in response to new information, sensory stimulation, development, damage, or dysfunction.

OR

Neural plasticity, also known as neuroplasticity or brain plasticity, can be defined as the ability of the nervous system to change its activity in response to intrinsic or extrinsic stimuli by reorganizing its structure, functions, or connections.

The given statement, lightning protection is achieved by providing an elevated well-grounded conductor that will more likely launch the upward-going discharge that connects with the downward moving leader, thereby providing a path to ground for the lightning current that does not go through the object to be protected, is true.

Lightning protection is a system designed to protect a structure or facility from damage caused by a lightning strike. This is typically achieved by providing a path for the lightning current to safely pass through the structure and into the ground, rather than allowing it to damage or destroy the building or its contents. One common method for achieving lightning protection is by installing an elevated, well-grounded conductor, such as a lightning rod, that will more likely launch the upward-going discharge that connects with the downward moving leader, providing a path to ground for the lightning current. This prevents the current from passing through the protected structure and reduces the risk of damage. Other methods such as lightning arrestors, surge protection devices and earthing are also used as a part of lightning protection system.

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Answer:

Explanation:

Power (p)= 40 watt

time (t)= 3 minutes = 180 seconds

Energy (E)= ?

we know

P = E/t

40 = E / 180

E = 7200 Joules

Therefore it does 7200 joules of work.

hope it helps :)

Answer:

the acceleration of the car is 1.167 m/s²

Explanation:

Given;

initial velocity of the race car, u = 5 m/s

final velocity of the race car, v = 12 m/s

time to finish the race, t = 6 s

The acceleration of the car is calculated as;

a = (v - u) / t

a = (12 - 5) / (6)

a = 1.167 m/s²

Therefore, the acceleration of the car is 1.167 m/s²

Answer:

1.167 m/s^2

Explanation:

Given that a race car is accelerating at 5m/s and then speeds up to a final velocity of 12 m/s if the race car driver finished this let of the race in 6 seconds what was the car's acceleration ?

From the question, the following parameters are given

Initial velocity U = 5 m/s

Final velocity V = 12 m/s

Time t = 6 s

According to the definition of acceleration:

Acceleration = change in velocity per time taken.

I.e

Acceleration =( V - U)/ t

Acceleration =( 12 - 5 )/6

Acceleration = 7/6

Acceleration = 1.167 m/s^2

Therefore, acceleration is 1.167 m/s^2