According to our theory of solar system formation, which law best explains why the solar nebula spun faster as it shrank in size?.

Answer:

it's D

Explanation:

you divide the miles by the hours

B. Wave 1 has a smaller amplitude than wave 3.

Explanation:

The smaller the amplitude is, the more waves it's gonna  have. And you can tell, wave 1 has more waves than wave 3.

the second capacitor's charge decreases by 1000  µC. The two capacitors will be connected in parallel to the battery if switch S1 is likewise closed after a considerable amount of time.

The two capacitors will be connected in parallel to the battery if switch S1 is likewise closed after a considerable amount of time.

Initially, capacitor C1 had a charge of Q1 = C1V = (10 F)(50 V) = 500 C, while capacitor C2 had no charge at all.

the circuit's overall capacitance is as follows:

C = C1 + C2 equals 10°F + 20°F = 30°F.

The 50 V voltage applied across the capacitors stays constant.

The capacitors' overall charge will be:

Q=CV=(30 F)(50 V)=1500 C

Once switch S1 has been closed for a very long time, the charge on the second capacitor (C2) is as follows:

Q1 = 1500°C - 500°C = 1000°C, where Q2 = Q - Q1

Consequently, the second capacitor's charge decreases by 1000  µC..

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Answer:

C is correct

Explanation:

The statement that best describes how the phase of the Moon changes from a full moon to a new moon is as follows:

Thus, the correct option for this question is C.

The different phases of the moon may significantly include the new Moon, waxing crescent, first quarter, waxing gibbous, full Moon, waning gibbous, third quarter, and waning crescent. This cycle of phase change of the moon repeats once a month.

The Earth completes its one rotation around the sun in 365.25 days. While the moon completes its one rotation around the Earth in 29.5 days.  The rotation of the moon around the earth leads to phase change of it. This is because when the moon rotates around the sun, it directly or indirectly causes its exposure to the sun where its phase changes.

In the diagram above, when there is a full moon, the earth is present between the sun and the moon. But when a new moon arises, the moon is present between the earth and the sun.

Therefore, the correct option for this question is C.

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Answer:

The acceleration is 1 cm/s^2.

Explanation:

The acceleration is defined as the rate of change of velocity.

Here, initial velocity, u = 3/1 = 3 cm/s

final velocity, v = 4/1 = 4 cm/s

time, t = 1 s

Let the acceleration is a.  

Use first equation of motion

v =  u + at

4 = 3 + 1 x a

a = 1 cm/s^2

The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.

Velocity is the rate of change of displacement over time.

As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.

So option A is correct.

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True. Neutron stars are some of the densest objects that we can directly observe in the universe. These stars are formed when a massive star undergoes a supernova explosion, and the core of the star collapses under its own gravity, creating a super-dense object that is composed almost entirely of neutrons.

The Neutron stars have a mass similar to that of the sun but are only about 10 miles in diameter, making them incredibly compact. Because of their extreme density, neutron stars have very strong gravitational fields and can cause the space around them to warp and bend. They also emit intense radiation, including X-rays and gamma rays, which can be detected by telescopes. Studying neutron stars can provide insights into the fundamental properties of matter, as well as the processes that occur in the most extreme environments in the universe.

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Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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Answer:

Speed

Explanation:

The answer is speed. It doesn’t affect potential energy because it’s associated with position. But since kinetic energy is associated with motion speed affects it.

ITS A a AAA A A  a A A  A A A A A

The correct answer to Brewster’s angle is 48.8 degrees.

What is Brewsters's law?

The Brewster's angle is the angle of incidence at which polarised light travels perfectly through a clear dielectric surface without being refracted. The light that is reflected from the surface when unpolarized light is incident at this angle is therefore perfectly polarised.

This equation's name is Brewster's law, and the angle it specifies is Brewster's angle. For a glass medium in air, Brewster's angle for visible light is around 56° (n2 = 1.5), while it is roughly 53° for an air-water interface (n2 = 1.33)

Brewster's Angle is defined as the inverse tan of n 2 over n 1. The inverse tan of 1.52 divided by 1.33 is thus 48.8 degrees.

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The Earth's blackbody temperature would be approximately 303 K (or 30 degrees Celsius) in this scenario, assuming the Earth's albedo remains the same.

This can be calculated using the Stefan-Boltzmann law, which states that the amount of radiation emitted by a blackbody is proportional to its fourth power temperature. Since the Sun's luminosity is 10 times greater, the Earth would receive 10 times more energy and therefore its temperature would increase. Specifically, the temperature would increase by the fourth root of 10 (since the energy received by the Earth is proportional to the square of the distance from the Sun). This calculation results in a temperature increase of about 1.8 times, or approximately 48 degrees Celsius. Therefore, adding this to the Earth's current blackbody temperature of 255 K gives a new temperature of approximately 303 K.

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The blackbody temperature of the Earth would be 255 K x 1.78 = 453.9 K.

According to the Stefan-Boltzmann law, the temperature of a blackbody is directly proportional to the fourth root of its luminosity. Therefore, if the Sun had exactly 10 times its current luminosity, the Earth's blackbody temperature would increase by the fourth root of 10, which is approximately 1.78. So, the new blackbody temperature of the Earth would be 255 K x 1.78 = 453.9 K.

This is significantly higher than the current blackbody temperature of the Earth, and would likely result in a much warmer planet. It is important to note that this calculation assumes that the Earth's albedo remains the same, even though an increase in temperature could potentially lead to changes in the Earth's albedo.

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In the dry and extremely hot conditions of Southern California during summer, at approximately 1 pm, one would expect to see that the stomata of plants are closed. This is because to avoid excessive water loss through transpiration, plants tend to close their stomata, which are tiny openings on the surface of leaves responsible for gas exchange. Closing the stomata helps to conserve water by reducing the loss of water vapor from the plant's leaves.

Stomata play a crucial role in gas exchange during photosynthesis. However, when plants are exposed to hot and dry conditions, the closure of stomata becomes essential to prevent excessive water loss. By closing their stomata, plants can reduce transpiration and conserve water. Transpiration is the process through which water vapor escapes from the plant through the stomata.

Closing the stomata helps in minimizing water loss by reducing the evaporation of water from the plant's leaves into the surrounding dry air. This is particularly important in drought conditions when water availability is limited. By conserving water, plants can better withstand the dry and hot environment.

While the closure of stomata helps in water conservation, it also has an impact on photosynthesis. When the stomata are closed, the exchange of gases, including carbon dioxide (CO2) for photosynthesis, is restricted. As a result, the rate of photosynthesis decreases. However, in extremely hot and dry conditions, the priority for the plant is to conserve water rather than carry out photosynthesis. Therefore, it is expected that the stomata will be closed to limit water loss, even though this reduces the availability of CO2 for photosynthesis.

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I) Tension in the spring = 2N

ii) Angular speed of the bung=5 rads-¹

iii) The time(T) it takes to make one complete revolution=1.256 seconds

Formula used to calculate the time(T) it takes to make one complete revolution = 2π √(l/g)

l = radius= 40cm = 0.4m

g = acceleration due to gravity = 10m/s-²

π =3.14( constant)

T = 2× 3.14 × √0.4/10

T = 6.28 ×√0.04

T = 6.28 × 0.2

T= 1.256 seconds

Formula to calculate angular speed(w)= 2π/T

where T= 1.256 secs

Therefore w = 2×3.14/1.256

w = 6.28/ 1.256

w = 5 rads-¹

Formula to calculate Tension in the spring(F)

= mrw²

where m= 200 g = 0.2kg

r = radius= 40cm = 0.4m

w = angular speed = 5 rads-¹

Therefore F = 0.2 × 0.4 × 5²

= 0.08 ×25

= 2N

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A tuning fork is struck, vibrating the fork and generating sound. When the tuning fork is submerged in water, the sound waves are dampened, and the sound is reduced.

Sound waves are made up of vibrations, and vibrations need a medium to travel through. The density of the medium affects the velocity of sound in it. As a result, sound waves move more slowly in water than they do in air. However, when a tuning fork is submerged in water, the sound waves that it generates travel through the water, which is a more dense medium than air.

As a result, the sound waves are refracted, or bent, and lose their energy faster, causing the sound to fade more quickly.If a tuning fork is struck while submerged in water, it will create sound waves in the water. Sound waves produced in water have less energy and travel slower than sound waves generated in air.

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The reflection appears to flip when you are at a distance R=2f from the spoon because of the specific properties of concave mirrors.

Concave mirrors have a curved surface that bulges inward. They are capable of focusing light and producing real or virtual images depending on the position of the object relative to the mirror. When you look at your reflection in a concave mirror like a metal spoon, the curvature causes light rays to converge.The reflection appears upside down when you are farther away from the spoon because the light rays from different parts of your face converge to form an inverted image. As you move closer to the spoon, the distance between your eye and the mirror becomes closer to the focal length (f) of the mirror. At the focal point, the reflected rays become parallel, and when your eye is positioned at a distance of R=2f from the spoon (twice the focal length), the rays appear to diverge, resulting in an upright reflection. This phenomenon is known as the "virtual image reversal" and is a characteristic behavior of concave mirrors.

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Answer:

The capacitor helps to store data even after the battery is removed

Explanation:

The cell phone is fitted with different types of capacitors, which come in all shapes and sizes. However they come, their main function is to store charges within them, and dissipate these charges when necessary.

This serves a great purpose in the printed circuit boards of phones as they provide the power needed for data to be stored even when the battery of the phone is removed.

A capacitor is a solid-state device because it has no moving part. It just stores charges within its parallel plates for the phone until the power is needed.

The Sun's outward bloating is driven by nuclear fusion, while its contraction is due to the force of gravity. The balance between these forces maintains the Sun's size and shape, ensuring its stability over billions of years.

The sun is a dynamic and complex celestial body that undergoes constant change and evolution. One of the main processes that affects the sun's size and shape is nuclear fusion. This process involves the merging of atomic nuclei to form heavier elements, releasing a tremendous amount of energy in the process. As the sun undergoes fusion, it tends to bloat outward, expanding in size and becoming less dense. However, this expansion is not infinite, as the gravitational force of the sun's mass ultimately pulls it back together. In fact, the sun also undergoes a process of contraction, as gravity causes it to compress and become more dense. This cycle of expansion and contraction is essential for the sun's stability, as it helps maintain a delicate balance between the forces of nuclear fusion and gravity.

The sun's size and shape are influenced by the opposing forces of nuclear fusion and gravity. While fusion causes the sun to bloat outward, gravity pulls it back together and causes it to contract. This cycle of expansion and contraction is a crucial factor in the sun's overall stability and longevity. The Sun tends to bloat outward due to nuclear fusion and contract due to gravity. In the core of the Sun, nuclear fusion occurs, converting hydrogen into helium. This process releases a tremendous amount of energy in the form of light and heat, which creates an outward pressure that counteracts the force of gravity.

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When you observe a rocket moving away from you, compared with its length when it was at rest on the ground, you will measure its length shorter than its length when it was at rest on the ground.

This is because of a phenomenon known as length contraction, which occurs due to the relative motion of an object to an observer. According to special relativity, when an object moves relative to an observer, its length will appear to be shorter than its rest length in the direction of its motion.

This effect is noticeable only at very high speeds, approaching the speed of light, and is not noticeable at everyday speeds.Therefore, if you observe a rocket moving away from you at high speed, its length will appear to be contracted or shorter than its length when it was at rest on the ground.

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Answer: Many gas fireplaces will work without electricity. You can run both intermittent pilot ignition fireplaces and standing pilot light systems during a power outage. IPI valve systems will normally have a backup battery system in place to ignite the flames

The energy of the least energetic photon that can be absorbed by these atoms when initially in their ground state is numerically equal to energy of the electron at that orbit.

An electron shell, also known as a primary energy level, is the orbit of one or more electrons around the nucleus of an atom in chemistry and atomic physics. The "1 shell" (also known as the "K shell") is the shell that is closest to the nucleus.

The "2 shell" (also known as the "L shell"), "3 shell" (also known as the "M shell"), and so forth are the shells that are further and more away from the nucleus. The shells are either labelled alphabetically with X-ray notation letters or with the primary quantum numbers (n = 1, 2, 3, 4...) (K, L, M, N...).

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Answer:

Movement skills in square dancing transfer to ballroom dancing when they both require you to dance in a rhyme.

Explanation:

The climate change can directly impact the formation of hurricanes because increasing temperature increases intensity of hurricanes.

Evaporation increases as temperatures rise which also causes the transfer of heat from the oceans to the atmosphere. As the storms travel across oceans whose water is warm, they absorb more water vapor and heat which increases rainfall as well as intensity of hurricanes.

So we can conclude that the climate change impacted the formation of hurricanes due to increasing temperature that increases intensity of hurricanes.

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Answer:

the second one

Explanation:

cus 6-8= -2

An atom of helium is neutrally charged because it has an equal number of protons and electrons.

An atom of helium is neutrally charged because it has an equal number of protons and electrons.

Helium is the second lightest element in the periodic table and has an atomic number of 2, which means it has two protons in its nucleus. The protons have a positive charge. Surrounding the nucleus are two electrons, which have a negative charge. The number of protons determines the atomic number and the element's identity, while the number of electrons determines the atom's charge.

In the case of helium, it has two protons and two electrons. Since the positive charge of the protons cancels out the negative charge of the electrons, the atom as a whole has no net charge and is considered neutrally charged.

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An atom of helium is neutrally charged because it has an equal number of protons and electrons.

The charge of an atom is determined by the balance between its positively charged protons and negatively charged electrons. In the case of helium (He), the atomic number is 2, indicating that it has 2 protons in its nucleus. Since atoms are electrically neutral overall, helium must also have 2 electrons surrounding the nucleus.

The positive charge of the protons is exactly balanced by the negative charge of the electrons, resulting in a net charge of zero for the atom. This balance of charges ensures that the attractive forces between the protons and electrons cancel out, resulting in a neutral helium atom.

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The length of the string wrapped around a circular cylindrical post is 20ft.

We have a circular cylinder and a string wrapped around it.

If we unwrap one complete revolution of string around the post. We have a rectangle. Having a width of 4ft (that is the circumference of the post.)

height of the post is 12 feet

Then height of the rectangle is. 12/4 = 3ft

The string evenly loops around the post exactly four full times, starting at the bottom edge and finishing at the top edge.

So the length of this is the hypotenuse of right triangle sides 3 and 4

then length determined using Pythagoras theorem

L² = 3²+4² = 25

L =√25 =5ft

Here we have three more similar triangles in  more 3 revolution.

1 revolution×5+ 3revolution×5

4×5 =20ft

The length of the string  wrapped around a circular cylindrical post is 20ft.

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Answer:

Explanation:

Average speed = Total distance / Total time.

100 km/hr

r = 100 km / hr

t = 6 hours

d = 6 * 100 = 600 km

120 km / hr

r = 120 km / hr

t = 5 hour

d = 120 * 5

d = 600 km

Total distance = 600 + 600 = 1200 km

Total time = 5 hour + 6 hours = 11 hours.

Average speed = 1200 km / 11 hours = 109.1

Answer:

Explanation:

First off, you'd wanna get the distance for the

Distance = Speed * time; Speed = Distance / time

Avg. Speed = Total Distance / total time

First case: 100 * 6 = 600 km

Second case: 120 * 5 = 600km

Next, you add the distances - 600 + 600 = 1200km

Then divide by the total time which is 6 + 5 = 11 hours

1200 / 11 = 109.1 km/hr

OR

You can simply add both speeds and divide by 2 which would only give an estimate. (100+120)/2 = 110 km/hr

The distance the car would travel when it hit the barrier before coming to a stop is 14.6 m.

The distance travelled by the car before stopping is calculated by applying third kinematic equation as shown.

v² = u² - 2as

where;

when the car stops,  the final velocity will zero, v =  0

0 = u² - 2as

2as = u²

s = u²/2a

The given parameter;

initial velocity of the car, u = 110 km/h = 30.56 m/s

a = 32 m/s²

s = (30.56²) / (2 x 32)

s = 14.6 m

Thus, when the car hits the soft barrier, it will slow down and travel a distance of 14.6 m before coming to rest.

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The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be 1 + 2 + 10 = 13 Ohms. So the answer is A) 13 Ohms.

the total resistance in a series circuit consisting of three resistances: 1 Ohm, 2 Ohms, and 10 Ohms.

To find the total resistance in a series circuit, you simply add the individual resistances together.
Add the resistances
1 Ohm + 2 Ohms + 10 Ohms = 13 Ohms

So, the total resistance in this series circuit is 13 Ohms.

The total resistance in a series circuit is equal to the sum of the individual resistances. Therefore, the total resistance in this circuit would be  13 Ohms.

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