According to present scientific understanding of the Milky Way's formation, which of the following statements are true? Select al that apply. Halo stars are stars that are born in the disk and ejected into the halo by gravitational encounters. The galaxy formed from the collapse of a single, giant protogalactic cloud. Disk stars formed before halo stars. Halo stars formed before disk stars. The protogalatic cloud(s) contained essentially no elements besides hydrogen and helium

If all the colors (a continuous spectrum) pass through a gas, the resulting spectrum would depend on whether the gas is emitting or absorbing light. In this process, the gas absorbs specific wavelengths of light, leaving dark lines in the otherwise continuous spectrum. These absorbed wavelengths correspond to the energy levels of the electrons in the atoms of the gas.

If the gas is emitting light, it would produce an emission line spectrum, which would appear as bright lines against a dark background. If the gas is absorbing light, it would produce an absorption line spectrum, which would appear as dark lines against a continuous background.

The exact position of the lines would depend on the chemical composition of the gas. Additionally, some of the absorbed or emitted light may fall in the infrared or ultraviolet portions of the spectrum, depending on the energy levels of the atoms and molecules in the gas.

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Energy refers to the ability or capacity to do work. Energy can be of various types as follows:

Kinetic energy is energy possessed by an object because of its motion while potential energy is energy possessed by an object because of its position or its condition.

The law of conservation of energy states that energy cannot be created nor destroyed but can only be transformed i.e. converted from one form to another.

Friction is a force that resists the relative motion or tendency to such motion of two bodies in contact.

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According to the question an electromagnetic wave in a vacuum moves at the speed of light.

An electromagnetic wave is a type of energy that is created by the vibration of an electric field and a magnetic field. Electromagnetic waves are an invisible form of energy that can travel through a vacuum and other types of matter. They can also travel through the air and other materials, such as metal and water. Electromagnetic waves are responsible for many of the phenomena we observe in our everyday lives, such as light, sound, and radio. Electromagnetic waves have a wide range of frequencies, ranging from high-energy gamma rays to low-energy radio waves. Each type of electromagnetic wave has its own unique properties, such as wavelength, frequency, and amplitude. Electromagnetic waves are also responsible for the transmission of information through cell phones, radio waves, television waves, and microwaves.

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Answer:

The Soccer ball would travel the furthest then the bowling ball

Explanation:

The Soccer ball would travel the furthest then the bowling ball because heavier objects require more force. This example can be compared with us pushing a huge rock vs us pushing a small rock, of you thing about it the small rock moves easily then the huge rock and this is due to their difference in their mass.

Answer:

obviously sasuke

Explanation:

everyone is always over estimating borutos powers like lets be real here sasuke is almost as strong as naruto and when they were younger he had better hand to hand combat and in jutsu's he was a prodigy and he is able to calculate precise movements to try and defeat his oponent lets not forget that he has the sharingon over whatever jutsus boruto has (i dont know because ive never seen the anime and i dont plan on doing so) (i hate boruto its trash) which means he could read borutos chakra and he would be more powerful because his sharingan awoken when he was a mear child he would be much more powerful beause hes mastered his sharingan. oh yeah and his fire ball and chidori (which could k!11 boruto if sasuke inflicts enough chakra into his jutsu) (if u want to say otherwise my pronouns are she/her so use them if u want to say something involving pronouns thanks)

Hi There, Buddy!

To solve this problem, let us divide the entire motion into 2 phases

1.) When the elevator is moving with an acceleration

2.) When the elevator has a deceleration

For the first half -

u = 0 , a = 0.6 , t = t1

v = 0.6(t1)  ---------- ( 1 )

s = 1/2 x 0.6 x (t1)^2 = 0.3(t1^2) -------- ( 2 )

For the second half -

u = 0.6(t1) , a = -0.8 , v = 0

0.6 x (t1) = 0.8 (t2) ----> 3(t1) = 4(t2) ---------- ( 3 )

0.36(t1)^2 = 1.6 s2 ---------- ( 4 )

Now, we know that the total time taken is 10 seconds

------- t1 + t2 =10 , 3t1 = 4t2 ---- t1 = 40/7 , t2 = 30/7

Now, substitute values of t1 and t2 in s1 and s2 and add both s1 and s2 to get total distance travelled.

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Answer:

yes

Explanation:

matter can be created out of two photons (brainliest please)

The maximum mass of block A for which block B will remain at rest is approximately 15.18 kg.

To find the maximum mass of block A for which block B will remain at rest, we need to consider the forces acting on both blocks.

1. First, let's consider block B on the wedge platform.

The weight of block B is given by the equation:

Weight of B = mass of B × acceleration due to gravity

Weight of B = 70.0 kg × 9.8 m/s²

                   = 686 N

2. The normal force acting on block B can be calculated using the equation:

Normal force on B = Weight of B × cos(30°)

Normal force on B = 686 N × cos(30°)

                              ≈ 594.55 N

3. The static friction force acts between block B and the wedge surface. The maximum static friction force can be calculated using the equation: Maximum static friction force = Static coefficient of friction × Normal force on B

Maximum static friction force = 0.24 × 594.55 N

                                                ≈ 142.69 N

4. Now, let's consider the forces acting on block A. The weight of block A is given by:

Weight of A = mass of A × acceleration due to gravity

Weight of A = mass of A × 9.8 m/s²

5. To keep block B at rest, the maximum static friction force must be equal to or greater than the horizontal component of the weight of block A.

The horizontal component of the weight of A is given by:

Horizontal component of Weight of A = Weight of A × sin(60°)

Horizontal component of Weight of A = (mass of A × 9.8 m/s²) × sin(60°)

6. Setting the maximum static friction force equal to the horizontal component of the weight of A, we have:

Maximum static friction force = Horizontal component of Weight of A 142.69 N

Maximum static friction force = (mass of A × 9.8 m/s²) × sin(60°)

7. Solving for the mass of A, we get:

mass of A = (142.69 N) / (9.8 m/s² × sin(60°))

mass of A ≈ 15.18 kg

Therefore, the block B will remain at rest until a maximum mass of block A of about 15.18 kg.

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Complete question is,

Two blocks are attached by light wires in the configuration shown in the figure below. The block B of mass 70.0 kg rests on a wedge platform fixed to the floor, and the static coefficient of friction between the block and the wedge surface is 0.24. Find the maximum mass of block A for which the block B will remain at rest. Wall 1 60° B 30° A Wedge fixed to floor

a) the answer is delta waves i think

Answer:

A

Explanation:

The Garden of Cosmic Speculation is a private garden that was designed by Charles Jencks and Maggie Keswick, which makes use of several scientific models in its construction. The garden was created as an artwork, and is located near Dumfries in Scotland.

In order to understand the ways in which science is modeled in the Garden of Cosmic Speculation, it is important to look at the specific design elements that Jencks and Keswick used in its construction. One of the most important scientific models that is used in the garden is that of fractal geometry.

Another scientific model that is used in the Garden of Cosmic Speculation is that of chaos theory. This theory describes the behavior of complex systems, such as the weather or the stock market, which can appear random but are actually governed by underlying patterns. In the garden, chaos theory is represented by the twisting and turning paths that wind through the landscape.

Finally, the garden makes use of several scientific themes, such as the concept of the universe and the origins of life. The garden's features include a black hole and a water cascade that represents the Big Bang, as well as a terrace that is designed to resemble a fossil.

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Answer:

poopgshshsh

Explanation:

cacawusususu

A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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A collision that is fully elastic is one where there is no kinetic energy lost during the contact. In an inelastic collision, a proportion of the energy is converted into another kind of energy during the contact.

In elastic collisions, kinetic energy and momentum are both conserved. Consider two similar trolleys that are moving in the same direction at the same pace. With no loss of speed, they collide and bounce off one another. Since no power has been lost, this collision is fully elastic.

photo of A description of completely elastic collision

When a system's maximal quantity of kinetic energy is equal to zero, a relatively inelastic collision takes place.

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The farthest position the mouse reaches inside the tunnel is 4 meters into the tunnel.

From the graph,

The positions reached after,

5 s = 4 m

10 s = 2 m

20 s = 2 m

35 s = 3 m

40 s = 0 m

So the farthest position here is 4 m into the tunnel.

The rate of change of positions is displacement. So displacement will be change in initial and final positions divided by change in time.

s = Δx / Δt

Therefore, the farthest position the mouse reaches inside the tunnel is 4 meters into the tunnel.

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Answer: Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.

-ilovejiminssi ✿︎

Answer:

true

Explanation:

this is true, igneous rocks are formed from molten lava when it cools

Answer: True

Explanation:

A specific number of frames per minute are processed by the projector when a motion picture on film is shown.

Motion is indeed the open borders of a body in relation to time. For instance, the fan, the carpet's dust blowing off of it, the water running from the taps, a ball rolling about, a moving car, etc. Even for the universe is always changing.

Movement, the act of process of changing or shifting locations or positions. ability to move with the force of a physical human. gait is the term for the way a person walks. a gesture; a movement or shift in posture.

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The frequency of the sound waves reaching the observer's ear is 997 Hz.

The Doppler effect is a physical phenomenon that describes the variation in frequency or wavelength of a wave when the source of the wave is in relative motion with the observer. The Doppler effect applies to light, sound, and other types of waves that transmit through a medium. The frequency of the sound waves heard by an observer is dependent on the speed of the observer and the source of the wave.

The equation used to calculate the apparent frequency of sound heard by a moving observer is: fa = fs (v±vo) / (v±vs)where,fa = the apparent frequency heard by the observerfs = the frequency of the source of the wavevo = the speed of the observer relative to the mediumvs = the speed of the source of the wave relative to the mediumv = the speed of the wave in the medium

Here, The frequency of the roof-mounted siren is 975 Hz.The observer is moving away from the source of the wave at a speed of 6.00 m/s.The speed of the sound wave in the medium is 343 m/s (at 20°C).

The speed of the observer relative to the medium is positive because they are moving away from the source of the wave. Therefore, vo = +6.00 m/s.

The speed of the source of the wave relative to the medium is zero because the siren is mounted on the roof and not moving relative to the medium. Therefore, vs = 0 m/s.

Substituting these values into the equation, we get:fa = fs (v±vo) / (v±vs)fa = 975 Hz * (343 m/s + 6.00 m/s) / (343 m/s + 0 m/s)fa = 997 Hz.

Therefore, the frequency of the sound waves reaching the observer's ear is 997 Hz.

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Answer:

1 deg C = 5/9 deg F         (Ex. 212 F - 32) * 5/9 = 100

So deg F = 9/5 deg C = 9/5 * 2.9 = 5.2 deg F

1. The basic source of magnetism is C. Magnetic dipoles.

2. Magnets nowadays are made of D. A and B (Iron and Steel).

3. Magnets were found in place of C. Magnesia.

4. A piece of plastic will not experience a force when placed near a magnet.

5. The false statement is D. Produced by magnetic field and electric field.

6. Light travels fastest in D. Vacuum.

7. The frequency of the light with a wavelength of 600 mm in air is A. 5x10^14 Hz.

8. Gamma rays have the shortest wavelength among the given options.

1. The basic source of magnetism is determined by the alignment and behavior of magnetic dipoles. Magnetic dipoles are responsible for the creation of magnetic fields and the properties of magnets.

2. Magnets nowadays are commonly made of both A. Iron and B. Steel. Iron provides the ferromagnetic properties, while steel adds strength and durability to the magnet.

3. Magnets were originally found in C. Magnesia, which is a region in ancient Greece where lodestone (a naturally occurring magnetic mineral) was discovered.

4. A piece of plastic, being non-magnetic, will not experience a force when placed near a magnet. Only materials with magnetic properties, such as iron, nickel, or cobalt, can be attracted to magnets.

5. The false statement is D. "Produced by magnetic field and electric field." Electromagnetic waves are produced by the oscillation of electric and magnetic fields, not produced by their interaction.

6. Light travels fastest in D. Vacuum. In a vacuum, light travels at its maximum speed of approximately 3x10^8 meters per second. Its speed is slightly slower in other transparent media such as air, glass, and diamond due to interactions with atoms and molecules.

7. To find the frequency of light with a wavelength of 600 mm in air, we use the formula:

speed of light = wavelength * frequency.

Rearranging the formula, we have:

frequency = speed of light / wavelength.

Substituting the values, where the speed of light is approximately 3x10^8 m/s and the wavelength is 600 mm (or 0.6 m), we get:

frequency = (3x10^8 m/s) / (0.6 m) = 5x10^14 Hz.

8. Among the given options, gamma rays have the shortest wavelength. Gamma rays have the highest frequency and energy among the electromagnetic spectrum, and they are typically produced during radioactive decay or nuclear reactions.

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The electric force between the droplets, and the horizontal acceleration this force produce on the droplets are: 5.84*10^-7 N and 0.32 m/s² respectively

In physics the electric force is the force that attracts or repels two charges (q) separated at a distance called (r), this is expressed in the international system of units in Newton.

To solve this exercise the electric force formulas and the procedures we will use are:

Where:

Given Info:

Applying the electric force formula we have:

F = (k * q1 * q2)/r²

F = [(9 *10^9 N*m²/C² * (2.9*10^-11 C) * (2.9*10^-11 C)]/ (3.6*10^-3 m)²

F = 7.569*10^-12 N*m² /1.296*10^-5 m²

F = 5.84*10^-7 N

Applying the force formula and clearing the acceleration, we get:

a= F/m

a= 5.84*10^-7 N/ 1.8*10^-6 kg

a= 0.32 m/s²

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Answer:

(a) ω = 1.57 rad/s

(b) ac = 4.92 m/s²

(c) μs = 0.5

Explanation:

(a)

The angular speed of the merry go-round can be found as follows:

ω = 2πf

where,

ω = angular speed = ?

f = frequency = 0.25 rev/s

Therefore,

ω = (2π)(0.25 rev/s)

ω = 1.57 rad/s

(b)

The centripetal acceleration can be found as:

ac = v²/R

but,

v = Rω

Therefore,

ac = (Rω)²/R

ac = Rω²

therefore,

ac = (2 m)(1.57 rad/s)²

ac = 4.92 m/s²

(c)

In order to avoid slipping the centripetal force must not exceed the frictional force between shoes and floor:

Centripetal Force = Frictional Force

m*ac = μs*R = μs*W

m*ac = μs*mg

ac = μs*g

μs = ac/g

μs = (4.92 m/s²)/(9.8 m/s²)

μs = 0.5

Answer:

The type of energy is potential energy

Answer:

0.45  [m/s²].

Explanation:

1) formula of the required acceleration is (V-final velocity, V₀-initial velocity, t-elapsed time):

\(a=\frac{V-V_0}{t};\)

2) according to the formula above:

a=(12-3)/20=0.45 [m/s²].

Answer:

1610 meters

Explanation:

Answer:

1609.344 Meters

Explanation:

There is no explanation

Could someone help me? A cannon is fired with an initial horizontal velocity of 20 m/s and initial vertical velocity of 25 m/s . After 3s in the air, the canon hits its target. How far away was the canon from its target?

A high jumper leaves the ground with an initial velocity of 10 m/s rightward at an angle of 15 degrees . What is the high jumper's initial horizontal velocity?

The drag force acting on the skydiver immediately after she has opened the parachute is 588 N

since we are provided with a coefficient which is 60.0 kg/m, the problem we are dealing with is related to drag force which is The resistance offered by a liquid, like water or air, which is called the drag force, when an object moves through it. It acts in a direction inverse to the object’s movement. It is produced by the relative speed between the strong object and the liquid. Whether the object or liquid is moving, drag happens as long as there's a difference in their speeds. Since it is safe to move, drag tends to moderate the object. A successful way to diminish it is to change the shape of the object and make it streamline.

Here the drag force is equal to  its weight,

F= mg = 60* 9.8 =588 N

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A sound traveling through air at 200 Hz has the same velocity as one traveling at 400 Hz.

The source determines the frequency of the sound wave. However, the density of the medium and the bulk modulus are the only factors that affect the speed of the sound wave. When compared to the speed of sound at 400 Hz, the speed of sound at 200 Hz is therefore constant.

Air and water have different sound propagation rates. The speed of sound in air is around 343 meters per second under normal circumstances, while the speed of sound in water is approximately 1,480 meters per second. Fundamentally, a compression wave moving through a medium is what makes up normal sound.

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Correct Question:

Compared to the velocity of a 400 Hz sound, the velocity of a 200 Hz sound through air is __________.

Answer:

C. Nucleus

Explanation:

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.

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