What is a partial solar eclipse definition

Answer: SBb

On 1930 the astronomer Edwin Hubble classified the galaxies based on their visual appearance into elliptical, spiral and irregular, being the first two classes the most frequent.  

So, according to this classification, the Milky Way is a barred spiral galaxy (SBb in Hubble's notation system) because it has a central bar-shaped structure of bright stars that spans from one side of the galaxy to the other. In addition, its spiral arms seem to emerge from the end of this "bar".

Scientifics considered this, after measuring the the disk and central bulge region of the galaxy, and the conclusion is the Milky Way fulfills these conditions, because is a galaxy that orbits on its same axis and with this rotation its arms are twisted in opposite directions around the mentioned axis.

Therefore the correct answer is option C.

Answer:

The voltage will quadruple

Explanation:

The power dissipated in a circuit is given by

[tex]P=\frac{V^2}{R}[/tex]

where

V is the voltage

R is the resistance

In this problem, the voltage across the circuit is doubled:

V' = 2V

So the new power dissipated is

[tex]P'=\frac{V'^2}{R}=\frac{(2V)^2}{R}=4\frac{V^2}{R}=4 P[/tex]

so, the power dissipated will quadruple.

When the voltage across a circuit of constant resistance is doubled, the current doubles and the power dissipated increases by a factor of four.

To understand what happens when the voltage across a circuit of constant resistance is doubled, we need to refer to Ohm's Law and the formula for electrical power dissipation.

Ohm's Law states that the current  through a resistor is directly proportional to the voltage  across it and inversely proportional to the resistance

I = V / R

Therefore, if the voltage is doubled, the current will also double, assuming the resistance remains constant.

The power dissipated by a resistor can be calculated using the formula:

[tex]P = V^2 / R[/tex]

When the voltage is doubled, the expression for power becomes:

[tex]P = (2V)^2 / R \\= 4V^2 / R[/tex]

This means that doubling the voltage will result in the power being multiplied by a factor of four.

Thus,when the voltage across a circuit of constant resistance is doubled, the current will double, and the power dissipated by the circuit will increase by a factor of four.

A. [tex]4.64\cdot 10^{11}m[/tex]

The orbital speed of the clumps of matter around the black hole is equal to the ratio between the circumference of the orbit and the period of revolution:

[tex]v=\frac{2\pi r}{T}[/tex]

where we have:

[tex]v=30,000 km/s = 3\cdot 10^7 m/s[/tex] is the orbital speed

r is the orbital radius

[tex]T=27 h \cdot 3600 =97,200 s[/tex] is the orbital period

Solving for r, we find the distance of the clumps of matter from the centre of the black hole:

[tex]r=\frac{vT}{2\pi}=\frac{(3\cdot 10^7 m/s)(97200 s)}{2\pi}=4.64\cdot 10^{11}m[/tex]

B. [tex]6.26\cdot 10^{36}kg, 3.13\cdot 10^6 M_s[/tex]

The gravitational force between the black hole and the clumps of matter provides the centripetal force that keeps the matter in circular motion:

[tex]m\frac{v^2}{r}=\frac{GMm}{r^2}[/tex]

where

m is the mass of the clumps of matter

G is the gravitational constant

M is the mass of the black hole

Solving the formula for M, we find the mass of the black hole:

[tex]M=\frac{v^2 r}{G}=\frac{(3\cdot 10^7 m/s)^2(4.64\cdot 10^{11} m)}{6.67\cdot 10^{-11}}=6.26\cdot 10^{36}kg[/tex]

and considering the value of the solar mass

[tex]M_s = 2\cdot 10^{30}kg[/tex]

the mass of the black hole as a multiple of our sun's mass is

[tex]M=\frac{6.26\cdot 10^{36} kg}{2\cdot 10^{30} kg}=3.13\cdot 10^6 M_s[/tex]

C. [tex]9.28\cdot 10^9 m[/tex]

The radius of the event horizon is equal to the Schwarzschild radius of the black hole, which is given by

[tex]R=\frac{2MG}{c^2}[/tex]

where M is the mass of the black hole and c is the speed of light.

Substituting numbers into the formula, we find

[tex]R=\frac{6.26\cdot 10^{36} kg)(6.67\cdot 10^{-11})}{(3\cdot 10^8 m/s)^2}=9.28\cdot 10^9 m[/tex]

To estimate the distance of matter clumps from the black hole center and the mass of the black hole, one must use Kepler's laws and gravitational physics equations. For calculating the black hole's mass and the radius of its event horizon, principles involving gravitational constant, speed of the matter, the speed of light, and calculated mass of the black hole are applied.

To answer these questions, we can use some fundamental principles of orbital mechanics and gravitational physics. Given the clumps' approximate orbit period of 27 hours and their speed of 30,000 km/s, we leverage Kepler's Third Law of Planetary Motion. However, we should note that direct conversion from the available data to an explicit distance is non-trivial without simplifying assumptions.

To calculate the black hole's mass with this information, the equation GM=(v^2)R is used where G is the gravitational constant, M is the mass of the black hole, v is the speed of the matter, and R is the distance from the center of the black hole. Integer solutions of this equation can offer us an educated estimate of the mass of the black hole in the middle of Galaxy Markarian 766, expressed in multiples of our Sun's mass.

For estimating the radius of the event horizon, the Schwarzschild radius formula R=2GM/c^2 is applied, where c stands for the speed of light. This computation will again depend on the accurate estimation of the black hole’s mass.

https://brainly.com/question/16118644

#SPJ3

Answer:

b. amplitude

Explanation:

There are two types of intereference:

- Constructive interference: it occurs when two waves of same frequency meet at a point in phase - this means , the crest of one wave meets with the crest of the other wave. When this occurs, the resultant wave has an amplitude which is equal to the sum of the amplitudes of the two waves.

- Destructive interference: it occurs when two waves of same frequency meet at a point in opposite phase - this means , the crest of one wave meets with the trough of the other wave. When this occurs, the resultant wave has an amplitude which is equal to the difference between the amplitudes of the two waves.

When interference occurs, the other factors of the waves (period, frequency and wavelength) do not change.

In constructive interference, the factor that increases is the amplitude of the resulting wave. The amplitudes of the individual waves combine to produce a wave with greater amplitude, while the period, frequency, and wavelength remain unchanged.

When two waves meet and interfere constructively, the factor that increases is the amplitude of the resulting wave. Constructive interference occurs when waves are in phase and their crests (and troughs) align. The amplitudes of the individual waves add together, resulting in a wave with a greater amplitude. This is shown in various figures such as FIGURE 16.33 and FIGURE 27.11 in your provided references, which illustrate pure constructive interference producing a wave with twice the amplitude, but the same wavelength.

It is important to note that the period, frequency, and wavelength of a wave are not directly affected by interference. The period and frequency are inversely related, so when the period of a wave increases, its frequency decreases. However, this question refers to the effects of interference, not changes in the wave's frequency or period.

The relation between amplitude and frequency of a wave is that they are generally independent of each other; an increase in amplitude does not necessarily cause a change in frequency, and vice versa.

1. +72.0 kg m/s

The momentum of an object is given by:

p = mv

where

m is the mass of the object

v is its velocity

Taking "to the right" as positive direction, for Elena we have

m = 60.0 kg is the mass

v = +1.20 m/s is the velocity

So, Elena's momentum is

[tex]p_e=(60.0 kg)(+1.20 m/s)=+72.0 kg m/s[/tex]

2. -162.5 kg m/s

Here Madison is moving in the opposite direction of Elena (to the left), so her velocity is

v = -2.50 m/s

while her mass is

m = 65.0 kg

Therefore, her momentum is

[tex]p_m= (65.0 kg)(-2.50 m/s)=-162.5 kg m/s[/tex]

3. -90.5 kg m/s

The total momentum of Elena and Madison is equal to the algebraic sum of their momenta; taking into account the correct signs, we have:

[tex]p=p_e + p_m = +72.0 kg m/s - 162.5 kg m/s =-90.5 kg m/s[/tex]

4. 0.72 m/s to the left

We can find the final speed of Elena and Madison by using the law of conservation of momentum. In fact, the final momentum must be equal to the initial momentum (before the collision).

The initial momentum is the one calculated at the previous step:

[tex]p_i = -90.5 kg m/s[/tex]

while the final momentum (after the collision) is given by

[tex]p_f = (m_e + m_m) v[/tex]

where

[tex]m_e[/tex] is Elena's mass

[tex]m_m[/tex] is Madison's mass

v is their final velocity

According to the law of conservation of momentum,

[tex]p_i = p_f\\p_i = (m_e + m_m) v[/tex]

So we can find v:

[tex]v=\frac{p_i}{m_e + m_m}=\frac{-90.5 kg m/s}{60.0 kg+65.0 kg}=-0.72 m/s[/tex]

and the direction is to the left, since the sign is negative.

Elena's momentum is 72.0 kg*m/s to the right, Madison's is -162.5 kg*m/s to the left. The total system momentum is -90.5 kg*m/s to the left. After colliding, they move together with a speed of 0.724 m/s to the left.

The subject here is Physics, specifically the conservation of momentum. Momentum is calculated as mass times velocity. The positive and negative signs denote direction (right, left).

Elena's momentum is the product of her mass (60.0 kg) and velocity (1.20 m/s). Hence, momentum = 60.0 kg * 1.20 m/s = 72.0 kg*m/s towards the right (positive).

Madison's momentum is the product of her mass (65.0 kg) and velocity (2.50 m/s). Because she's moving to the left, the velocity is negative. Hence, momentum = 65.0 kg * -2.50 m/s = -162.5 kg*m/s towards the left (negative).

The total momentum of Elena and Madison is the sum of their individual momenta: 72.0 kg*m/s + (-162.5 kg*m/s) = -90.5 kg*m/s to the left.

When they collide and hold onto each other, they move together, so their combined mass is 60.0 kg + 65.0 kg = 125.0 kg. The total system's momentum should still be conserved, so -90.5 kg*m/s = 125.0 kg * velocity. Solving for the speed gives velocity = -90.5 kg*m/s / 125.0 kg = -0.724 m/s. The negative sign indicates they move in the negative direction or to the left.

https://brainly.com/question/30677308

#SPJ11

Answer:

Sirius

Explanation:

Sirius is known s the most brightest star in the sky the second brightest star is Canopus

We have that The speed of the disturbance V is

[tex]V=872.9m/s[/tex]

From the Question we are told that

Density  [tex]\rho=1300 kg/m3[/tex]

Diameter [tex]d=3.0\mu m[/tex]

Tension [tex]T=7.0mn[/tex]

Generally the equation for the  length mass density is mathematically given as

[tex]\pho_{lm}=p \pir^2[/tex]

[tex]\pho_{lm}=1300* \pi (3 *10^{\frac{-6}{2}})^2[/tex]

[tex]\pho_{lm}=9.187*10{-9Kg/m}[/tex]

Therefore

The speed of the disturbance V is

[tex]V=\sqrt{(T/\pho_{lm})}[/tex]

[tex]V= \sqrt{(\frac{7 *10^{-3}}{(9.187 *10^{-9}}))}[/tex]

[tex]V=872.9m/s[/tex]

In conclusion

The speed of the disturbance V is

[tex]V=872.9m/s[/tex]

For more information on this visit

https://brainly.com/question/22610586

The disturbance traveling along the radial thread of the web will reach the spider first, as the speed of sound is significantly slower.

The speed of sound in a material depends on its properties. In the case of a spider's silk thread, sound travels at a much lower speed compared to the disturbance along the thread. Therefore, the disturbance traveling along the radial thread of the web will reach the spider first.

Thus, the disturbance traveling along the radial thread of the web will reach the spider first. The speed at which sound travels is significantly slower than the speed at which disturbances travel along a stretched string or thread. In this case, the radial thread of the web acts like a tensioned string, and the disturbance caused by the impact of the fly will propagate along it faster than the sound of the impact.

The acceleration of the object is defined as the rate of change of velocity divided by change in time. Acceleration is the vector quantity.

Acceleration of the object is obtained by a change in velocity. Velocity defines the how speed the object travels in a particular direction. Velocity is also defined as the rate of change of displacement per unit time.

Acceleration depends on the velocity. Acceleration, (a) = Δv/Δt, where Δv changes in velocity and Δt is a change in time. When velocity changes with time gives acceleration. Velocity is the vector quantity and hence, acceleration is also a vector quantity. The SI unit of velocity is m/s².

If the velocity increases with time, it is acceleration and if the velocity decreases with time, it is called deceleration. Hence, the change in velocity divided by the change in time gives, acceleration.

To learn more about acceleration:

https://brainly.com/question/2303856

#SPJ6

Acceleration is defined as the change in velocity divided by the time period over which the change occurs, and it is measured in meters per second squared (m/s²).

Acceleration is defined as the change in velocity divided by the period of time during which the change occurs. In mathematical terms, average acceleration (a) can be expressed as: a = Δv / Δt

where Δv is the change in velocity and Δt is the change in time. The SI units for velocity are meters per second (m/s), and for time, they are seconds (s).

Therefore, the SI unit for acceleration is meters per second squared (m/s²). For example, if a car's velocity changes from 10 m/s to 20 m/s over 5 seconds, the average acceleration is (20 m/s - 10 m/s) / 5 s = 2 m/s².

Complete Question :  Acceleration is defined as the change in velocity divided by:

Final Velocity

Distance

Time

Speed

Answer:

Radio waves

Explanation:

Answer:

radio waves

Explanation:

Answer:

A

Explanation:

The energy of an electromagnetic wave is directly proportional to its frequency, according to the equation:

E = hf

where

h is the Planck constant

f is the frequency

The frequency of a wave is the number of complete cycles per unit of time: in the figures shown, we see that the more we go towards the right, the higher the frequency is (because the wavelength becomes shorter, so the waves makes more complete cycles per second). This means that the more the box is on the right, the higher the frequency: the figure with the box located more on the right is A, so this is also the figure that represents the range of frequencies with most energy.

Answer:

B

Explanation:

The battery voltage in this circuit with a 20-ohm resistor and a current of 2 amps is 40 volts.

In order to find the battery voltage, we can use Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In this case, the resistance is 20 ohms and the current is 2 amps. Using the formula V = IR, we can calculate the battery voltage as follows:

V = 2A * 20Ω = 40V

Answer:

-10.0 cm

Explanation:

OK so in the equation they're having you use the variables are:

[tex]d_o = 5.0 cm\\\\f = 10.0 cm\\\\d_i = ?[/tex]

So we simply plug in the variables:

[tex]d_i = \frac{d_of}{d_o-f} \\\\d_i = \frac{5.0 * 10.0}{5.0 - 10.0}\\\\d_i = \frac{50}{-5}\\\\d_i = -10.0 cm[/tex]

Answer:

a) Wavelength .

Explanation:

Visible light is comprised of all the seven colors Violet , Indigo , Blue , Green , Yellow and Red .

Color depends up on the wave length of the light .

For example a red ball appears red because it absorbs wavelengths of all the other colors and reflects only wavelengths corresponding to red color.

Color in terms of light is determined by both the wavelength and frequency, with different combinations producing all the colors we humanly perceive.

In the context of light, color is dependent on both the wavelength and frequency of light. This is because the visible spectrum which represents the colors that can be seen by the human eye, is defined by varying wavelengths and frequencies. Shorter wavelengths (and correspondingly higher frequencies) are associated with cooler colors like blue and violet, while longer wavelengths (and correspondingly lower frequencies) are associated with warmer colors like red and orange. Therefore, the answer to this is option c) both frequency and wavelength determine the color of light.

https://brainly.com/question/32134468

#SPJ6

The masses of the objects and how much distance there is between them

Answer:

(Saturn ) is the homogeneous mixture

Answer:

The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.

Explanation:

Brightness of the bulb is given as

[tex]P= \frac{V^2}{R}[/tex]

since all bulbs are connected in parallel so here voltage across each bulb will remain same and resistance of each bulb is "R"

So here power across each bulb will remain the same always.

So there will be no effect on the power or brightness of bulb.

Now we also know that equivalent resistance is given as

[tex]\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3}............[/tex]

[tex]R_{eq} = \frac{R}{n}[/tex]

so here equivalent resistance will decrease on adding more resistance in parallel.

so correct answer will be

The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.

Answer: C ON EDGE

Explanation:

Answer:

Yes

Explanation:

The momentum of an object is given by:

[tex]p=mv[/tex]

where

m is the mass of the object

v is the velocity of the object

We know that an elephant has a mass much larger than the mass of an ant. However, we see that the momentum of the animal also depends on its velocity.

If the elephant is at rest, its velocity is zero:

v = 0

so its momentum is also zero:

p = 0

And therefore, an ant which is moving (so, non-zero speed) can have more momentum than an elephant, if the elephant is at rest.

5,758.5 miles or thr moon is a quarter of the diameter of the earth

The Earth's diameter is 5,758.5 miles larger than the diameter of the moon.

The diameter of the Earth is approximately 7,917.5 miles, while the diameter of the moon is about 2,159 miles. Therefore, we can determine how much larger the Earth is in diameter than the moon by subtracting the diameter of the moon from the Earth's diameter.

So, 7,917.5 miles (diameter of Earth) - 2,159 miles (moon’s diameter) = 5,758.5 miles.

Therefore, the Earth's diameter is 5,758.5 miles larger than the diameter of the moon.

https://brainly.com/question/32274310

#SPJ12

Answer:

B) 8.0 m

Explanation:

First of all, we can find the frequency of the wave, which is equal to the number of waves that pass a given point per second. Therefore:

[tex]f=\frac{N}{t}=\frac{5.0}{4.0 s}=1.25 Hz[/tex]

which means 1.25 waves/second.

Then we can find the wavelength of the water waves, which is given by:

[tex]\lambda=\frac{v}{f}[/tex]

where

v = 10.0 m/s is the speed of the wave

f = 1.25 Hz is the wave frequency

Substituting, we find

[tex]\lambda=\frac{10.0 m/s}{1.25 Hz}=8.0 m[/tex]

Answer:

During an alpha decay

Explanation:

An alpha particle is a particle consisting of 2 protons and 2 neutrons - basically it is equivalent to a nucleus of helium.

Alpha particles are emitted during alpha decays, which are one of the three types of radioactive decays (the other two being beta decay and gamma decay) in which an unstable nucleus decays emitting an alpha particle:

[tex]X \rightarrow Y + \alpha[/tex]

In the process, the original nucleus X loses 2 protons and 2 neutrons, so:

- its atomic number decreases by 2 units: Z --> Z-2

- its mass number decreases by 4 units: A --> A-4

According to Newton's law of Gravitation, the force [tex]F[/tex] exerted between two bodies or objects of masses [tex]m1[/tex] and [tex]m2[/tex]  and separated by a distance [tex]r[/tex]  is equal to the product of their masses divided by the square of the distance:

[tex]F=G\frac{(m1)(m2)}{r^2}[/tex]

Where [tex]G[/tex]is the gravitational constant.

As we can see, this force is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

This means that the gravity force decreases when the distance between these two bodies increases, and increases when the masses of the bodies increases.

The force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of their separation distance. It is significant with large masses or small separations and is fundamental in celestial mechanics, imparting weight and affecting planetary and satellite motions.

The force of gravity between two objects depends on certain factors. Newton's Universal Law of Gravitation states that this force is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Consequently, as the masses of the two objects increase, the gravitational force between them also increases. Conversely, as the distance between the two objects increases, the gravitational force they exert on each other decreases with the square of that separation distance. This is a fundamental principle in understanding celestial mechanics and the behavior of objects under the influence of gravity.

It is also important to note that gravitational force is a relatively weak force compared to other forces in nature, such as electromagnetic forces, and it becomes significant only when involving objects with large masses or when objects are very close to each other. The force of gravity is what imparts weight to objects with mass and it plays a crucial role in the movements of planets, comets, and satellites within our solar system.

Answer:

True

Explanation:

Energy/power is not gained or lost going through a (ideal) transformer.

So the transformer in this problem really doesn't matter.  If the lamp is using energy at the rate of 60 watts, then the whole contraption is getting 60 watts of power from the wall outlet.

Power = (voltage) x (current)

60 watts = (120 v) x (current)

Current = (60 watts) / (120 v)

Current = 0.5 Ampere

A mechanical wave is a disturbance in matter that transfers energy through the matter.

Mechanical waves require a medium to travel through, such as a solid, liquid, or gas.

Mechanical waves require a medium through which they can travel. The medium can be a solid, liquid, or gas. Examples of mechanical waves include water waves, sound waves, and seismic waves.

https://brainly.com/question/24459019

#SPJ6

Answer:

-7.5 cm

Explanation:

OK so in the equation they're having you use the variables are:

[tex]d_o = 5.0 cm\\\\f = 15.0 cm\\\\d_i = ?[/tex]

So we simply plug in the variables:

[tex]d_i = \frac{d_of}{d_o-f} \\\\d_i = \frac{5.0 * 15.0}{5.0 - 15.0}\\\\d_i = \frac{75}{-10}\\\\d_i = -7.5 cm[/tex]

Answer:

C. -7.5 cm

Explanation:

got it right, trust

Yes they are all correct

You can check your answers at

https://eesc.columbia.edu/courses/ees/climate/lectures/gen_circ/index.html

Answer:

It is directly proportional

Explanation:

For an ideal gas, the average kinetic energy of the particles and the temperature (in Kelvin) are directly proportional, according to the equation:

[tex]E_K = \frac{n}{2}kT[/tex]

where

Ek is the average kinetic energy

k is the Boltzmann constant

T is the absolute temperature

n is the number of degrees of freedom of the molecules in the gas (n=3 for monoatomic gases, n=5 for di-atomic gases, etc..)

Therefore, as the temperature of a gas increases, the average kinetic energy of the molecules increases proportionaly to it.

The temperature of a substance is proportional to the average kinetic energy of its particles, and as temperature increases, particles move faster, resulting in a wider range of kinetic energies, and the entropy of the substance increases.

Understanding Kinetic Energy and Temperature

Kinetic energy is the energy that particles have due to their motion. According to the kinetic-molecular theory, the temperature of a substance is directly proportional to the average kinetic energy of its particles. As the temperature increases, particles move faster, resulting in greater kinetic energy. The Boltzmann distribution illustrates that at higher temperatures, not only is the average kinetic energy higher, but the range of kinetic energies also becomes broader, indicating a larger distribution of speeds among the particles. In other words, there are more particles with energies significantly higher or lower than the average.

At absolute zero, the theoretical temperature where all kinetic motion ceases, particles would have no kinetic energy. However, in reality, substances increase their temperature by absorbing energy, which then increases the motion of their constituent particles. As a result, the energy of the particles in a substance can be simply related to the temperature of the substance using the equation E ≅ kT, where 'E' represents the typical kinetic energy of the particles and 'T' is the temperature in kelvins. The constant 'k' is Boltzmann's constant.

With an increase in temperature, solids will have more extensive vibrations, liquids will have more rapid translations, and gases will have faster-moving particles. This increase in energy transfer among particles results in a greater distribution of kinetic energies and also affects the entropy of the substance, which increases with temperature. A visual representation of the different average kinetic energies for particles at two temperatures can be seen in energy distribution curves where a flatter curve corresponds to a higher temperature.

A change in the speed of a wave as it enters a new medium causes refraction, which alters the wave's direction. This is due to the differing densities of the mediums involved, as demonstrated by Huygens's principle and Snell's law.

A change in the speed of a wave as it enters a new medium produces a change in the wave's direction, a process known as refraction. This phenomenon occurs because different media have different properties, such as density, that affect the wave's speed. For example, when light moves from air into water, it slows down and bends towards the normal due to water's higher density. The same principle applies to water waves going from deep to shallow water; they slow down and their wavelength decreases as they enter the shallower water, bending the path of the wave closer to the perpendicular. This bending of the wave is explained by Huygens's principle of wavefronts and can lead to the derivation of Snell's law for calculating the angle of refraction.

Answer:

The surface gravity is inversely proportional to the square of the radius of the planet

Explanation:

The gravity at the surface of a planet is given by:

[tex]g=\frac{GM}{R^2}[/tex]

where

G is the gravitational constant

M is the mass of the planet

R is the radius of the planet

We see from the formula that the surface gravity is inversely proportional to the square of the radius of the planet, R.

At the Earth's surface, the value of the surface gravity is approximately 9.81 m/s^2.