A Franck-Hertz experiment for hydrogen shows dips in the anode current at voltages of 10.20 V and 12.09 V (absorption). What three wavelengths should be observed in the radiation emitted from this Franck-Hertz tube

Answer:

0m/s

Explanation:

When the ball hits the ground, it then moves with uniform motion and when an object is in uniform motion, the speed is 0m/s

Luke putting his motorcycle up for sale via a post on an online auction site is an invitation to negotiate, not an offer.

In the context of contract law, an offer is a specific proposal made by one party to another, indicating a willingness to enter into a contract on certain terms. However, when Luke posts his motorcycle for sale on an online auction site, he is not making a specific proposal to sell his motorcycle to a particular buyer. Instead, he is inviting potential buyers to make offers or negotiate the terms of the sale. The act of putting the motorcycle up for sale is considered an invitation to negotiate, as it allows interested parties to express their interest and make offers based on their own terms and conditions. The actual offer and acceptance of the sale would occur when a specific buyer makes a bid or offer that Luke accepts, forming a contract between them. Until that point, the posting serves as an invitation for potential buyers to engage in negotiations rather than a binding offer.

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Answer:

true :-)

Explanation:

The correct answer is that the polarity of charge q2 on the rod must be negative and the magnitude of the charge q2 on the rod is 2.24 × 10⁻⁸ C. Mass of the balloon, m = 2 g Charge given to balloon, q1 = -4 × 10⁻⁸ C distance from balloon, d = 6 cm = 0.06 m Coulomb force constant, k = 1/(4πε0​) = 8.99 × 10⁹ Nm²/C² Acceleration due to gravity, g = 9.81 m/s².

We need to find the polarity of charge q2 on the rod and how much charge q2 does the rod have.

In order for this to occur, the electric force on the balloon must be equal in magnitude to the weight of the balloon.

Force on balloon due to electric field,F = k * (q1 * q2) / d² where, q2 is the charge on the rod.

The weight of the balloon,W = mg = 2 × 9.81 = 19.62 mN.

For the balloon to float,

F = W => k * (q1 * q2) / d² = 19.62 × 10⁻³=> q2 = (19.62 × 10⁻³ * d²) / (k * q1)=> q2 = (19.62 × 10⁻³ * 0.06²) / (8.99 × 10⁹ * 4 × 10⁻⁸)=> q2 = 2.24 × 10⁻⁸ C.

The polarity of charge q2 on the rod must be negative and the magnitude of the charge q2 on the rod is 2.24 × 10⁻⁸ C.

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Answer:

16m/s

Explanation:

Mv=mv

5000x8=2500x v

V=5000x8/2500

V=40000/2500

= 16m/s

Just one electrons fill the outer shell of the smallest four elements( H, He, Li, & Be).

A chemical element is a described as chemical substance that cannot be broken down into other substances.

The elements Hydrogen (H), lithium (Li), and sodium (Na), are  group 1 elements and are called  inert gases or noble gases because of their non-reactivity, hence have just one electron in their outermost shells.

Elements has properties and the properties include, but are not limited to, conductivity, magnetism, melting point, boiling point, color, state of matter, and others.

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Answer:

the keys will make it back to John.

Explanation:

In order to find out if the keys will reach John or not, we can use the formula of projectile motion to find the maximum height reached by the keys:

H = V²Sin²θ/2g

where,

V = Launch Speed = 18 m/s

θ = Launch Angle = 40°

g = 9.8 m/s²

Therefore,

H = (18 m/s)²[Sin 40°]²/(2)(9.8 m/s²)

H = 6.83 m

Hence, the maximum height that can be reached by the projectile or the keys is greater than the height of John's Balcony(5.33 m).

Therefore, the keys will make it back to John.

Yes, Key will surely reach back to John.

Given that;

Velocity v = 18 m/s

θ Angle = 40°

g = 9.8 m/s²

Computation:

By using maximum height formula

H = [v²][sin²θ]/2g

H = (18)²[Sin 40°]²/[(2)(9.8)]  

H = 6.83 m

6.83 meter is more then 5.33 meter,

So,

Key will surely reach back to John.

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An electron moving in a circular orbit of radius r at a speed v is likely to have an area A enclosed by the electron's orbit is πr², where r is the radius of the orbit.

The magnetic moment of a loop of current is given by the product of the current flowing through the loop and the area of the loop:

μ = I*A

where μ is the magnetic moment, I is the current flowing through the loop, and A is the area of the loop.

we can consider the electron moving in the circular orbit as a loop of current. The current flowing through the loop is the charge of the electron (e) multiplied by its velocity (v):

I = e*v

The area of the loop is the same as the area,

The area A enclosed by the electron's orbit is given by the formula,

A = π r²

Therefore, the area A enclosed by the electron's orbit is πr².

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-- impurities in the water

-- air pressure is higher than standard

Hi! Look below

Hence

\(\\ \rm\Rrightarrow KE\propto m\)

\(\\ \rm\Rrightarrow KE\propto v^2\)

Option A

Answer:

A. V²

Explanation:

The kinetic energy of a body is the energy by virtue of its motion.

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

Where V is the velocity

and m is the mass

1/2 is the constant term. So we can write as

K.Eαm and K.E.αv²

Wavelength = 0.16m to 2.dp

Wavelength = wave speed / frequency

= 1,151 ÷ 7,143

= 0.1611367773

Hope this helps!

The speed of the melon as it flies off the performer's head is 0.3 m/s

The law of conservation of momentum states that for a system of colliding bodies, the total momentum before the collision is equal to the total momentum after the collision, provided there is no net external force acting on the bodies.

To find the speed of the melon, we use the formula from the law of conservation of momentum.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The speed of the melon as it flies off the performer's head is 0.3 m/s.

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Answer:

Sound travels quite fast and sound wave must pass through a medium, such as air.

To measure a sound in classroom you will require to measure the time it takes a sound to travel a measured distance using stopwatch and meter stick but it would be difficult because walls of classroom will create echos echos.

Echos are reflections of sounds which causes timing errors and make difficult to meausre the speed of sound.

The correct answer are as follows

(i) 250 m is the maximum height

(ii) Time to reach the height is 5 s

(iii) Time of the flight is 10 s

(iv) Horizontal distance from the foot of the tower to point Q is 433 m

Given,  π°= stand as the angle= 30°

h= height= 100m

u= initial velocity= 100m/s

g= acceleration due to gravity= 10m/s²

(i) maximum height= h(max)= u²sin²π°/g

= 100²(sin30°)²/10

= 10000(0.25)/10

= 1000(0.25)

= 250m

height(max)= 250m

(ii)time it takes to reach the height= using π°/g

= 100sin30°/10

= 10 × 0.5

= 5

t= 5s

(iii)time of flight, T= 2t

T= 2(5)= 10

T= 10s

(iv)horizontal distance=H= u²cosπ°/2g

= 100²(cos 30°)/2(10)

= 10000(0.866)/20

= 500(0.866)

= 433

H ( distance)= 433m.

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Answer:

3.94

Explanation:

divide total mass by the number of blocks since they are identical

Answer:

3.94

Explanation:

You want to find the mass of one block. Since we know there is 8 blocks with the same mass, you can divide the total mass by 8 since the mass is equally distributed within the 8 blocks

Answer:

\(\lambda = 0.24 m\)

Explanation:

The string vibrates in the third harmonics, n = 3

Length of the string, l = 0.36 m

Frequency of the tone produced, f = 500 Hz

The speed of sound in air is 344 m/s

Calculate the speed of sound produced by the string in the third harmonics:

The frequency of sound is given by the formula:

\(f = \frac{nv}{2l} \\500 = \frac{3v}{2*0.36}\\500 * 2 * 0.36 = 3v\\v = 360/3\\v = 120 m/s\\v = \lambda f\\\lambda = v/f\\\lambda = 120/500\\\lambda = 0.24 m\)

Given:

As we know,

→ \(f = \frac{nv}{2l}\)

then,

→ \(500 = \frac{3v}{2\times 0.36}\)

→ \(360 = 3v\)

      \(v = \frac{360}{3}\)

         \(= 120 \ m/s\)

hence,

The wavelength will be:

→ \(v = \lambda f\)

or,

→ \(\lambda = \frac{v}{f}\)

By substituting the values,

     \(= \frac{120}{500}\)

     \(= 0.24 \ m\)

Thus the approach is correct.  

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Explanation:

The periscope is used in the submarines to see what is going on the water surface.

It is also used in some gun turrets and it is used in armed vehicles.

✨Hope it helps.✨

Answer:

d. it will be replaced by a new theory if enough evidence is collected.

Explanation:

i think

Answer:

Explanation: The density of gas differentiates all the varieties of gas present in the atmosphere.

HYDROGEN- it is a lighter gas having a lesser density.

For example, a hydrogen balloon displaces the air around it thus making it rise.

CARBON DIOXIDE: It is a denser gas as it makes the balloon heavier than the air pressure around it thus making it sink.

I hope the explanation was helpful. :)

Answer:

NaOH

Explanation:

oxide of a non-metal element is acidic. Na is metal. so NaOH is basic.

Answer:

d is the answer

Explanation:

Answer:

90%

Explanation:

if you lose 10% of a 100 you get 90

Answer:

The answer is "case law".

Explanation:

This law is not based on law, but on legislatures, statutes, or legislation, on judgments. Its also used as a different term with common law, which is the collection of precedents as well as power on a specific subject established in previous judicial decisions that are a part of Common law, which is also recognized as case law to establish by the court system based on legal case law.

we'll need to understand the relationship between frequency , capacitor, and voltage in a series RC circuit.
In a series RC circuit, the voltage across the capacitor (Vc) and the voltage across the resistor (Vr) are related to the total voltage (Vt) in the circuit.

According to Kirchhoff's voltage law, the sum of the voltages across the resistor and capacitor must equal the total voltage:
Vt = Vr + Vc
At the maximum voltage across the frequency capacitor, the capacitor will behave like an open circuit, and the current flowing through the circuit will be at its minimum. Since the current through the resistor and capacitor is the same in a series circuit, the current through the resistor will also be at its minimum.
As the voltage across the resistor is given by Ohm's Law:
Vr = I × R
where I is the current and R is the resistance, at minimum current, the voltage across the resistor (Vr) will also be at its minimum. In this particular case, when the voltage across the capacitor is at its maximum, the voltage across the resistor will be zero volts (0 V).

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Large planets orbiting close to their stars produce the largest brightness variations when they transit, and so are easiest to detect, the given statement is true because when a larger planet passes in front of its star, it blocks more of the star's light, leading to a greater decrease in the star's apparent brightness.

Consequently, these transits are easier to detect as they create more significant changes in the observed light curve. Smaller planets, on the other hand, block less light, making their transits more challenging to identify. Additionally, planets that orbit close to their stars have shorter orbital periods, meaning they transit more frequently. This makes it easier for astronomers to confirm the existence of these planets through repeated observations.

In contrast, planets with longer orbital periods require more extended observation times, which can be more difficult and time-consuming to obtain. In summary, it is true that large planets orbiting close to their stars produce the largest brightness variations when they transit, making them the easiest to detect in comparison to smaller planets or those with longer orbital periods.

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Answer:

 α= 1.3 10-5 ºC⁻¹

Explanation:

La dilatación termica de los cuerpos esta dada por la relación  

      ΔL = L₀ α ( T -T₀)

en este caso nos piden el coeficiente de dilatación térmica

     α =DL/L₀ DT

calculemos

      α = (  100,13 -100)/[100 (100 – 0)]

       α = 1,3 10-5 ºC⁻¹

Traduction

The thermal expansion of bodies is given by the relationship

       ΔL = L₀ α (T -T₀)

in this case they ask us for the coefficient of thermal expansion

        α = ΔL / L₀ ΔT

    let's calculate

        α = (100,13 -100) / [100 (100 - 0)]

        α= 1.3 10-5 ºC⁻¹

Output power of the solar panel is 170.6 W.

Solar panels are those tools that take the sun's rays and turn them into heat or power.

An array of solar (or photovoltaic) cells make up a solar panel, which can be used to produce power thanks to the photovoltaic effect. On the surface of solar panels, these cells are organized in a grid-like configuration.

Given parameters:

Area of the solar panel: A = 1.25 m²

Efficiency of the solar panel; η = 21.0%

The insolation of it = 650 W/m².

Hence, input power of the solar panel: I =  insolation × area

= 650 × 1.25 W

= 812.5 W.

Output power of the solar panel: O = efficiency × input power

= 21.0% ×821.5 W

= 170.6 W.

Hence, its output power is 170.6 W.

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Answer:

A national park is one such protected area for the special species of flora and fauna of the region. In Nepal, there are numerous national parks to conserve and protect wildlife and their natural habitat.

Answer:

Since heat is carried by electromagnetic waves, it does not need a physical medium to transfer it. Instead it radiates through space - this is how the Earth is heated by the Sun despite space being a vacuum.

Explanation:

The equivalent resistance of the three resistors connected in parallel is approximately 3 Ω.

Step 1: Identify the given resistances.
The three resistors have resistances of 15 Ω, 6 Ω, and 10 Ω, and they are connected in parallel.

Step 2: Understand the formula for calculating the equivalent resistance of resistors in parallel.
The formula for calculating the equivalent resistance (R_eq) of resistors in parallel is:

1 / R_eq = 1 / R_1 + 1 / R_2 + 1 / R_3 + ...

Step 3: Apply the formula using the given resistances.
Let's plug in the values of the resistances into the formula:

1 / R_eq = 1 / 15 Ω + 1 / 6 Ω + 1 / 10 Ω

Step 4: Calculate the equivalent resistance.
Now, perform the calculations:

1 / R_eq = 0.0667 (recurring) + 0.1667 (recurring) + 0.1
1 / R_eq ≈ 0.3333 (recurring)

Step 5: Find the reciprocal to get the equivalent resistance.
To get the equivalent resistance, take the reciprocal of the result:

R_eq ≈ 1 / 0.3333 (recurring)
R_eq ≈ 3 Ω

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