which type of star has surface temperature of 4000k and a luminosity 1000 times greater than the sun

The gravitational force between the Earth and moon predominate over electric forces due to the distance between the Earth and the moon which is very large and the fact that both the Earth and the moon are electrically neutral.So option 3 is correct.

Gravity is the force that attracts two bodies towards each other. This attraction depends on the mass of the objects and the distance between them. When two masses are placed near each other, they will attract each other, which results in a gravitational force. The strength of this force is dependent on the masses of the two objects and the distance between them.On the other hand, electric forces are attractive or repulsive forces that exist between two electrically charged objects. These forces are dependent on the amount of charge on the objects and the distance between them.In the case of the Earth and the moon, the gravitational force between the two is dominant over electric forces due to the distance between them and the fact that they are electrically neutral. The distance between the Earth and the moon is very large, so the electric force between them is much smaller than the gravitational force. Additionally, both the Earth and the moon are electrically neutral, which means that there are no charged particles to produce electric forces. Therefore, the gravitational force between the Earth and the moon is the predominant force.Therefore option 3 is correct.

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The third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

Given: The typical college freshman spends an average of =150 minutes per day, with a standard deviation of =50 minutes, on social media and the third quartile is 0.75.

Therefore, we can determine the answer as follows:

We know that the third quartile, denoted by Q3, is the value such that 75% of the data lies below it. So, z-score corresponding to the third quartile is given by:

z = invNorm(0.75)

Where, invNorm is the inverse Normal distribution function.

By definition, the inverse Normal distribution gives the z-score given the area under the Normal distribution curve. Here, we need to find the area corresponding to the upper tail of 0.25 (since 75% of the data lies below the third quartile). This can be calculated as follows:

Area to the left of Q3 = 1 - Area to the right of Q3= 1 - 0.25 = 0.75

Therefore, the z-score corresponding to this area is given by:

z = invNorm(0.75) = 0.6745

Now, the value of the third quartile can be obtained by using the z-score formula as follows:

z = (X - μ) / σ

where, X = value of the third quartile, μ = population mean = 150 (given), σ = population standard deviation = 50 (given)

Substituting the values, we get:

0.6745 = (X - 150) / 50

Solving for X, we get: X = 150 + 0.6745 * 50X = 183.72

Therefore, the third quartile is 183.72 minutes. So, the answer is 183.72 minutes.

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Answer:

Ep = 0.6095 [J]

Explanation:

As defined in the problem statement, potential energy is defined as the product of mass by gravity by height. But first we must convert all the values given to measures of the international system (SI)

g = gravity = 10 [m/s^2]

h = elevation = 40 [ft] = 12.19 [m]

m = mass = 5 [g] = 0.005 [kg]

Ep = potential energy [J]

Ep = 0.005*10*12.19 = 0.6095 [J]

Answer:

Deposition

Explanation:

The deposition phenomenon happens when sediment created by weathering and moved by erosion settles in a different location due to gravity

Deposition occurs when sediment, a combination of soil and rock produced by weathering, is eroded and transported to a new area.

Deposition is the act of depositing silt that has been transported by the wind, water, sea, or ice.

Earthen materials are worn away during erosion, a geological process in which they are moved by wind or water.

The removal of soil, rock, or dissolved material from one area on the Earth's crust and subsequent transport to another region for deposition are known as erosional processes. Erosion differs from weathering, which is a static process.

Given data ,

Let the sediment be deposited in an another location due to gravity

Now , As sediment, a mixture of soil and rock created by weathering, is eroded and moved to a new region, deposition takes place.

During three interrelated processes, lithification converts loose sediment grains that are produced by weathering and transported by erosion into clastic sedimentary rock. Deposition occurs when gravity and friction work against the forces that move sediment, enabling it to build up.

Hence , when sediment created by weathering and moved by erosion settles in a different location due to gravity , deposition takes place

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I expect that they will add, and their effect at every location will be the sum of their individual effects at that location.

For example:

If they're acting at the same point and in opposite directions, the effect will be the same as a single force at that point, with strength equal to their difference, and in the direction corresponding to whichever one is stronger.

Answer:

Motion under gravity refers to the movement of an object whose vertical motion is affected by the presence of gravity. The force that attracts objects downwards is GRAVITY. In fact, gravity works towards the centre of the Earth.

hope it helps you

make me brainliest plz

Answer: B, Ice has a lower density than liquid water.

The percentage of body weight that is made up of fat when compared to your other tissue, bone and muscles is called body composition.

Body composition refers to the proportion of fat, muscle, bone, and other types of tissue in the body. It is often expressed as a percentage of body weight that is made up of fat. Body composition can be measured using various methods such as skinfold thickness measurements, bioelectrical impedance, and dual-energy x-ray absorptiometry (DXA).

A healthy body composition is generally considered to be one with a low percentage of body fat and a high percentage of muscle mass. It is important to note that body composition is not the same as body weight, as two individuals can weigh the same but have very different body compositions. An imbalance in body composition can lead to health issues such as obesity and increased risk of chronic diseases. Regular exercise and a healthy diet can help to maintain a healthy body composition.

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Answer:

6 Newtons to the left.

Explanation:

We can convert  this into a generic algebra equation by giving directions positive and negative values.

The 6 will be positive, and the 10 and 2 will be negative.

Add 10 and 2 to have 12.

6-12 = -6.

Therefore you have 6 newtons to the left (negative).

The maximum voltage on the line is \(V_m_a_x = 101.5 V\) which can be calculated using the voltage reflection coefficient.


To find the maximum voltage on the line, we need to use the voltage reflection coefficient. This is given by:

ρv = \((Z_L - Z_0) / (Z_L + Z_0)\), where \(Z_0\) is the characteristic impedance of the transmission line.

For a 600-ohm transmission line,

\(Z_0\) = 600 ohms.

Substituting the given values, we get:

ρv = \((424.3 exp(j\pi /4) - 600)\) / \((424.3 exp(j\pi /4) + 600)\)ρv

=  \((-175.7 - 348.5j)\)/ \((849.8 exp(j\pi /4))\)ρv = \(-0.2162 exp(-j1.1304)\)

The maximum voltage on the line is given by:

Vmax = Vi / (1 - ρv)

Substituting the given values, we get:

Vmax = \(50 exp(j0) / (1 - (-0.2162 exp(-j1.1304)))\)

Vmax = 101.5 V

Therefore, the maximum voltage on the line is Vmax = 101.5 V.

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Answer:

about 30 km

Explanation:

about 30 km

The event horizon radius of a non- rotating 10 solar mass black hole is about 30 km.

Answer:

look down

Explanation:

Explanation:

Michael should put the vase at the bottom of the shelf to reduce the potential energy because the height of the vase to the floor is nearly zero.

Answer:

23 cm from the mirror

Explanation:

Skills and abilities do not make up our personality.

Personality encompasses an intricate amalgamation of traits that define our individuality, comprising our cognitions, emotions, and actions. It is shaped by a combination of genetic predispositions and environmental factors.

Individuals with diverse personality profiles exhibit distinct patterns of thinking, emoting, and engaging in conduct. By comprehending our individual personality traits, we empower ourselves to make wiser decisions and cultivate lives imbued with greater happiness and well-being.

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An example of the transfer of thermal energy by conduction is water in the entire pot is warmed when it is heated from the bottom. Hence, option B is correct.

When matter or particles physically touch each other, energy is transferred by conduction. Heat or electricity can be transferred as a result of the conduction phenomena.

The kinetic theory states that matter is composed of particles that move randomly and continuously. Thermal energy is produced by the random movement or vibration of the constituent parts of matter. Particles with more kinetic energy generate more heat, which increases the measurement of heat, or temperature. Temperature is an indicator of the typical kinetic energy contained in a group or volume of particles.

Conduction is the process in which direct contact between objects is required. Hence, it is concluded that option B is correct.

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Answer: An ice cube melts in a person's hand

Explanation:

just took the test

ANYTHING that's dropped near the Earth's surface and isn't affected by air resistance falls 9.8 m/s faster at any time than it did 1 second earlier.

0.5 second after it was dropped with zero speed, it's falling at

(0.5) x (9.8 m/s)  =  4.9 m/s .

It makes no difference which building it was dropped from.

When plates commute in the exact direction it collides, and the plates move to other at convergent boundaries.

The lighter, dense, and much more elastic oceanic plate dips underneath the thicker, more stiff continental plate whenever a continental plate encounters a marine plate.

It's known as subduction. Deep ocean trenches, like the one that runs down South America's west coast, are created by subduction.

The continent's undercut rocks start to melt. On occasions, a chain of eruptions forms as the hot magma rises to the surface and travels through the continent.

Nearly 80% of earthquakes happen along convergent borders when plates are being pushed together.

Destruction, when two continental plates crashes, is just another kind of convergent boundary. The plates collapse and are propelled upward since neither is heavier compared to the other.

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a. The force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. The speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

a. To calculate the force acting on the astronaut by the moon, we can use Newton's law of universal gravitation:

F = G * (m1 * m2) / r^2

where:

F is the force,

G is the gravitational constant (approximately 6.67430 × 10^-11 m^3 kg^-1 s^-2),

m1 is the mass of the astronaut (75 kg),

m2 is the mass of the moon (7.35 × 10^22 kg), and

r is the distance between the astronaut and the moon's center (2.5 × 10^6 m).

Let's plug in the values and calculate the force:

F = (6.67430 × 10^-11 m^3 kg^-1 s^-2) * (75 kg) * (7.35 × 10^22 kg) / (2.5 × 10^6 m)^2

F ≈ 2.54 × 10^3 N

Therefore, the force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. To find the speed of the astronaut, we can use the centripetal force equation:

F = (m * v^2) / r

where:

F is the force (calculated in part a, approximately 2.54 × 10^3 N),

m is the mass of the astronaut (75 kg),

v is the speed of the astronaut (what we need to find), and

r is the distance between the astronaut and the moon's center (2.5 × 10^6 m).

Let's rearrange the equation to solve for v:

v^2 = (F * r) / m

v = √((2.54 × 10^3 N * 2.5 × 10^6 m) / 75 kg)

v ≈ 1.54 × 10^3 m/s

Therefore, the speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

a. The force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. The speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

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Answer:24

Explanation:u just get good sum idek

The total energy of the system is 19.58 J.

T = 2(0.029 m)/(2.2 m/s) ≈ 0.026 s

ω = 2π/T ≈ 241.9 rad/s

v = ωA = (241.9 rad/s)(0.029 m) ≈ 7.01 m/s

K = (1/2)(0.8 kg)(7.01 m/s)^2 ≈ 19.58 J

Amplitude refers to the maximum displacement or distance of a waveform from its resting position, also known as the equilibrium or zero point. It is a fundamental property of waves, including electromagnetic waves such as light and sound waves.

In the context of sound waves, the amplitude is often associated with the volume or loudness of a sound. A sound wave with a higher amplitude will produce a louder sound than a wave with a lower amplitude. However, it is important to note that the relationship between amplitude and volume is not always straightforward and can be influenced by other factors such as frequency.

In physics, the amplitude is often used to describe the strength or intensity of a wave. For example, in the study of light waves, the amplitude can be used to describe the brightness or intensity of the light.

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A) Formulate policies to protect wetlands and ensure that the policies are enforced.

B) Wetlands hold important biodiversity. They are a source of foods, medicines, and raw materials. They help with stabilizing the climate.

As a governor of my state, the two most important steps to protect wetlands include:

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To protect the wetlands, I will ensure a strict enforcement of all existing state laws on the conservation of wetlands.

The wetlands are those areas that consists of marshes and swamps. They are of great important to the ecosystem and biodiversity.

a) The two things that I will do to protect wetlands are;

b) Wetlands are very important because;

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A balanced chemical equation demonstrates the Law of Conservation of Mass because it shows that the same amount of mass is present on both sides of the equation. This means that the total mass of the reactants is equal to the total mass of the products.

At 100m from the road, the estimated level of harmful gas is approximately 1.84 g/m³, and at 500m from the road, it is approximately 0.18 g/m³.

Considering the dispersion of pollutants due to wind speed and stability conditions using the Gaussian plume model.

Calculating the emission rate of harmful gas for all the vehicles on the road.

Each vehicle can emit up to 30 g/s, and there are 1500 vehicles running in 3 hours.

Total emission rate = (30 g/s) × (1500 vehicles) × (1 / (3 hours) × (3600 seconds/hour))

Total emission rate = 600 g/s

Now, we can estimate the level of harmful gas at different distances from the road using the Gaussian plume model. The equation for the ground-level concentration of a pollutant at a downwind distance x from the source is given by:

C = (Q / (2πuσy)) × exp(-(x - ux / H)² / (2σx²))

Where:

C = Ground-level concentration of the pollutant

Q = Emission rate (g/s)

u = Wind speed normal to the road (m/s)

σy = Vertical dispersion parameter (dependent on atmospheric stability conditions)

x = Downwind distance from the source (m)

H = Effective stack height (m)

σx = Horizontal dispersion parameter (dependent on atmospheric stability conditions)

For moderately stable conditions, the following values can be used:

σx = 0.09x

σy = 0.35x^0.8

The level of harmful gas at 100m and 500m from the road.

At 100m:

x = 100m

σx = 0.09x = 0.09 * 100 = 9m

σy = 0.35x^0.8 = 0.35 * (100^0.8) ≈ 24.92m

C = (Q / (2πuσy)) × exp(-(x - ux / H)² / (2σx²))

C = (600 g/s / (2π * 4 m/s * 24.92m)) × exp(-(100m - 0m)² / (2 * (9m)²))

C ≈ 1.84 g/m³ (rounded to two decimal places)

At 500m:

x = 500m

σx = 0.09x = 0.09 * 500 = 45m

σy = 0.35x^0.8 = 0.35 * (500^0.8) ≈ 124.60m

C = (Q / (2πuσy)) × exp(-(x - ux / H)² / (2σx²))

C = (600 g/s / (2π * 4 m/s * 124.60m)) × exp(-(500m - 0m)² / (2 * (45m)²))

C ≈ 0.18 g/m³ (rounded to two decimal places)

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Solar nebula flattening is a natural consequence of collisions between particles in a spinning cloud. therefore, option B is correct.

When a solar nebula collapses under its own gravity, it begins to spin due to the conservation of angular momentum. As the cloud spins, particles within it collide and interact. These collisions cause the cloud to flatten into a disk shape rather than remaining spherical.

Angular momentum plays a crucial role in this process. The initial slight asymmetry or irregularity in the nebula's shape leads to variations in the speeds and directions of the particles' motions. As particles collide and transfer momentum, their motion tends to align along the rotational axis of the cloud, promoting the formation of a flattened disk structure.

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Answer:

A) T1 = 566 k = 293°C

B) T2 = 1132 k = 859°C

Explanation:

A)

The average kinetic energy of the molecules of an ideal gas is givwn by the formula:

K.E = (3/2)KT

where,

K.E = Average Kinetic Energy

K = Boltzman Constant

T = Absolute Temperature

At 10°C:

K.E = K10

T = 10°C + 273 = 283 K

Therefore,

K10 = (3/2)(K)(283)

FOR TWICE VALUE OF K10:

T = T1

Therefore,

2 K10 = (3/2)(K)(T1)

using the value of K10:

2(3/2)(K)(283) = (3/2)(K)(T1)

T1 = 566 k = 293°C

B)

The average kinetic energy of the molecules of an ideal gas is given by the formula:

K.E = (3/2)KT

but K.E is also given by:

K.E = (1/2)(m)(vrms)²

Therefore,

(3/2)KT = (1/2)(m)(vrms)²

vrms = √(3KT/m)

where,

vrms = Root Mean Square Velocity of Molecule

K = Boltzman Constant

T = Absolute Temperature

m = mass

At

T = 10°C + 273 = 283 K

vrms = √[3K(283)/m]

FOR TWICE VALUE OF vrms:

T = T2

Therefore,

2 vrms = √(3KT2/m)

using the value of vrms:

2√[3K(283)/m] = √(3KT2/m)

2√283 = √T2

Squaring on both sides:

(4)(283) = T2

T2 = 1132 k = 859°C

A) The temperature at which the average kinetic energy will have a value of 2K10 is; T1 = 293 °C

B) The temperature at which the molecules have twice the rms speed, 2vrms is; T2 = 859 °C

A) We are given;

Initial temperature; T = 10°C = 283 K

Initial kinetic energy; KE = K10

Final kinetic energy; KE1 = 2K10

Now,formula for average kinetic energy of the molecules of an ideal gas is given as;

KE = (3/2)kT

Where;

k is Boltzmann constant

T is temperature

We are told that in the second case, KE = 2K10. Thus;

2K10 = (3/2)kT1

K10 = ¾kT1 - - - (eq 2)

In the first instance, we have;

K10 = (3/2)kT - - - (eq 1)

Put (3/2)kT for K10 in eq 2 to get;

(3/2)kT = ¾kT1

k will cancel out to get;

(3/2)T = ¾T1

Make T1 the subject to get;

T1 = 2T

Thus;

T1 = 2 × 283

T1 = 566 K

Converting to °C gives;

T1 = 293 °C

B) We want to find the temperature T2 (in degrees Celsius) at which the molecules will have twice the rms speed, 2v_rms.

Formula for kinetic energy is also;

KE = ½mv²

Thus;

½m(v_rms)² = (3/2)kT

v_rms = √(3kT/m) - - - (eq 1)

When rms speed is 2v_rms, we have;

½m(2v_rms)² = (3/2)kT2

v_rms = √(¾kT2/m) - - - (eq 2)

Thus;

√(3kT/m) = √(¾kT2/m)

Square both sides to get;

(3kT/m) = (¾kT2/m)

4T = T2

T2 = 283 × 4

T2 = 1132 K

Converting to °C gives;

T2 = 859 °C

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Answer:

Moment of Inertia, I = 0.016 kgm²

Explanation:

Mass of the ball, m = 0.20 kg

Length of the pitcher's arm, l = 0.28

Radius of the circular arc, r = 0.28 m

Moment of Inertia is given by the formula:

I = mr²

I = 0.20 * 0.28²

I = 0.20 * 0.0784

I = 0.01568

I = 0.016 kgm²

Answer:

the answer is B

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