How can the difference in the brightness of spectral lines be explained?

I Honestly Think Its A, If Its Wrong Im Sorry. But Im Sure Its A

Mass of the disc is equal to 500 g (m=500 g)

Radius of the disc if equal to 10 cm (r=10 cm)

1.    The diameter of the disc:

D = 1/4 (m) (r)^2

= 1/4 (500) x 10^2 g cm^2

= 12500 g cm^2

2.    The axis tangent to the disc and parallel to its diameter:

= 1/4 (m) (r )^2 + m (r )^2

= 5/4 x 500 x 10^2 g cm^2

= 62500 g cm^2

3.    The axis through the center or the disc and perpendicular to its plane:

= 1/2 (m) (r )^2 – ½ x 500 x 10^2 g cm^2

= 25000 g cm^2

The moment of inertia for the disc about its diameter is 0.0025 kg.m², the moment of inertia about an axis tangent to the disc parallel to its diameter is 0.0075 kg.m², and the moment of inertia about an axis through the center and perpendicular to the disc's plane is 0.005 kg.m².

The moment of inertia (I), a measure of an object's resistance to rotational motion about an axis, varies depending upon the axis of rotation. Various formulae apply for different axes:

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Power is a measure of how quickly work is done or how quickly energy is transferred. The relationship between work and power is (P) = W ÷ t

The following equation describes how work and power are related:

Power (P) = W ÷ t

The power production is larger when the same amount of work is completed in less time. On the other hand, if the work is spread out over more time, the power production is lower.

For instance, if two people work equally hard but one does the task faster than the other, that person is exerting more power than the person who takes longer.

This relationship demonstrates how power is influenced by both the quantity and duration of work.

Therefore, The relationship between work and power is (P) = W ÷ t

To know more about the power:

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Answer: D). The greenhouse effect makes it possible for organisms to live on Earth.

Explanation:

Greenhouse effect is a phenomena which depicts the fact that the heat energy from the earth does not reflect back to the space which has been obtain from the sun. This is caused by the greenhouse gases which traps the heat energy from sun making the atmosphere hot.

This results in fluctuations in climatic conditions. Responsible for melting of glaciers hence, the organisms which are adapted to survive in glaciers will not be able to survive in hot climatic conditions. Also the organisms living in the terrestrial regions cannot tolerate excess heat and will die.

Answer: The correct answer is torque.

Explanation:

When a loop of current carrying wire turns continuously in a magnetic field then torque will act on the loop. The loop tends to rotate such that its normal becomes aligned with magnetic field. Torque is a force which rotate the object about an axis.

Torque depends on the orientation of normal to the coil to the direction of the magnetic field.

Therefore, when a loop of current-carrying wire turns continuously in a magnetic field, torque is created.  

The correct answer is

D. Groups and Families

I did the quiz nd this was the right answer

Hopes this helps :)

Answer:

Explanation:

Optimism could be defined as a spiritual and mental disposal for positive outcomes, refers to the best future coming, the opposite of pessimism.

A optimistic person is who have a positive view of situation, even if it isn't seem like that, even these kind of people see positiveness in others, like Lydia.

Final answer:

The pressure of a 59.6-l gas sample containing 3.01 mol of gas at 44.9°C is approximately 1.31 atm or 995.6 torr, calculated using the ideal gas law equation.

Explanation:

To find the pressure of a gas sample, which contains 3.01 mol of a gas at a volume of 59.6 L and a temperature of 44.9°C, we can use the ideal gas law: PV = nRT. First, we need to convert the temperature to Kelvin by adding 273.15 to the Celsius temperature, giving us a temperature of 318.05 K. Using the given constant R = 0.0821 L • atm/(K • mol), we can rearrange the ideal gas law to solve for P (pressure).

The calculation is as follows:

P = (nRT) / V

P = (3.01 mol × 0.0821 L • atm/(K • mol) × 318.05 K) / 59.6 L

P ≈ 1.31 atm

Converting this to torr using the conversion 1 atm = 760 torr, we have:

P ≈ 1.31 atm × 760 torr/atm

P ≈ 995.6 torr

Final answer:

Velocity of a wave is obtained by multiplying its frequency by its wavelength. In this case, the velocity of the wave with a frequency of 760 Hz and a wavelength of 0.45 m is 342 m/s.

Explanation:

Velocity of a wave is calculated by multiplying the frequency of the wave by its wavelength. In this case, with a frequency of 760 Hz and a wavelength of 0.45 m, the velocity of the wave can be found by multiplying the frequency and the wavelength: 760 Hz x 0.45 m = 342 m/s.

To compute for the distance of a star given the parallax, we simply have to take the reciprocal of the magnitude of parallax. In this case, distance is:

distance = 1 / parallax

distance = 1 / 0.125

distance = 8 parsecs

Answer:B: longitudinal

Explanation:

Answer:

ultrasound imaging of the liver.

Explanation:

Liver ultrasound is not an application of the Doppler effect. The use of ultrasound is more common in medicine, for example, during pregnancy.

Another application in medicine is with the movement of blood. It is a flowmeter which allows the blood flow to be discovered through the Doppler effect, since a sound wave affects the red blood cells that are in motion inside the vessel and collect the echo signal.

Answer:If a person has the values for an object’s density and volume, what value can be calculated?

Explanation: The answer is C

6.86 N = (mass) x (9.8 m/s²)

Mass = (6.86 N) / (9.8 m/s²)

Mass = (6.86 kg-m/s²) / (9.8 m/s²)

Mass = (6.86/9.8) kg

Mass = 0.7 kilogram

I would use the 500-gram weight and the 200-gram weight, and hang them both from the end of the thread.  Then the total mass on the end of the thread is 700 grams.  When I take it to Earth, it will weigh 6.86 N .

Answer:

[tex]a_c = 3.92 m/s^2[/tex]

Explanation:

tangential speed of the girl is given as

[tex]v_t = 2.8 m/s[/tex]

diameter of the circle is given as

[tex]d = 4.0 m[/tex]

so here the radius of the circle is given as

[tex]R = 2.0 m[/tex]

now we know that centripetal acceleration of the object moving in circle is given as

[tex]a_c = \frac{v^2}{R}[/tex]

[tex]a_c = \frac{2.8^2}{2}[/tex]

[tex]a_c = 3.92 m/s^2[/tex]

A good experiment should have a control and test a single variable.

A good experiment should have the essential characteristic of using a control to compare the results of the experimental treatment. This ensures that any changes or effects seen in the experimental group can be attributed to the treatment being tested and not to other factors. Additionally, a good experiment should test a single variable to isolate the specific factor being studied.

For example, if a scientist is testing the effect of a new fertilizer on plant growth, they would have two groups of plants - one receiving the new fertilizer (experimental group) and one receiving no fertilizer (control group). By comparing the growth of the two groups, they can determine if the fertilizer had any effect.

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The problem deals with finding the initial horizontal speed of a ball thrown from a building, using kinematic equations and the principles of projectile motion.

The student is asking about the initial speed of a ball that is thrown horizontally from the roof of a building. To solve this problem, we need to use the principles of kinematics, specifically the equations of motion for uniformly accelerated bodies. Since the ball is thrown horizontally, its initial vertical speed is 0 m/s. The only vertical motion is due to gravity. We can calculate the time it takes for the ball to hit the ground using the formula for free fall distance d =  rac{1}{2}gt^2, where d is the distance fallen, g is the acceleration due to gravity (9.8 m/s^2), and t is time. Solving for t, we find that t =  rac{2d}{g}.

Answer:

correct answer is - light year

Explanation:

The ratio of gravitational force of the sun to the earth's gravitational force is about 1 : 1580

[tex]\texttt{ }[/tex]

Newton's gravitational law states that the force of attraction between two objects can be formulated as follows :

[tex]\large {\boxed {F = G \frac{m_1 ~ m_2}{R^2}} }[/tex]

F = Gravitational Force ( Newton )

G = Gravitational Constant ( 6.67 × 10⁻¹¹ Nm² / kg² )

m = Object's Mass ( kg )

R = Distance Between Objects ( m )

Let us now tackle the problem !

[tex]\texttt{ }[/tex]

Given:

radius of Earth = Re = 6.4 × 10⁶ m

mass of the Earth = Me = 6.0 × 10²⁴ kg

distance from Sun to Earth = Rs = 147 × 10⁹ m

mass of the Sun = Ms = 2.0 × 10³⁰ kg

Asked:

ratio of gravitational force of the sun and the earth = ?

Solution:

[tex]F_s : F_e = G \frac{ m M_s }{R_s^2} : G \frac{ m M_e }{R_e^2}[/tex]

[tex]F_s : F_e = \frac{ M_s }{R_s^2} : \frac{ M_e }{R_e^2}[/tex]

[tex]F_s : F_e = \frac{ 2 \times 10^{30} }{(147 \times 10^9)^2} : \frac{ 6.0 \times 10^{24} }{ (6.4 \times 10^6)^2}[/tex]

[tex]F_s : F_e \approx 1 : 1580[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: High School

Subject: Physics

Chapter: Gravitational Fields

The ratio of the Sun's gravitational force on an individual to that of Earth's can be found using Newton's Law of Universal Gravitation, which takes into account the masses of the Earth and Sun and the distances from the individual to the centers of these celestial bodies.

To calculate the ratio of the Sun's gravitational force on you to the Earth's gravitational force on you, we would use Newton's Law of Universal Gravitation, which states that the force of gravity between two masses is proportional to the product of their masses and inversely proportional to the square of the distance between their centers. For an object of mass m on the Earth's surface, the gravitational force it experiences due to the Earth (Fearth) can be calculated using the formula:

Fearth = G × (Mearth × m) / r2

where G is the gravitational constant, Mearth is the mass of the Earth, m is the mass of the object, and r is the radius of the Earth. Similarly, the gravitational force due to the Sun (FSun) is:

FSun = G × (Msun × m) / d2

where Msun is the mass of the Sun and d is the average distance from the Earth to the Sun. Given that both m and G are constants and cancel out when we take the ratio FSun/Fearth, the final ratio depends only on the masses of the Earth and Sun and the distance between the Earth and the Sun relative to the radius of the Earth.

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