what was the value of the scale factor a when the dark energy density became equal to the matter density? show your work, please.

Answer:

Two nuclei join to form a larger nucleus.

Explanation:

A

Explanation:

speed of wave

v = wavelength x frequency

since frequency is f = 1/Period then

v = wavelength : Period

v = 10 cm/ 0.2 s = 50 cm/s

v = 0.5 m/s

The speed of a wave in a spring if it has a wavelength of 10 cm and a period of 0.2s is 50 meters per second.

A wave is a disturbance which moves along a medium from one end to the other end. If one watches an ocean wave that is moving along the medium that is the ocean water, one can observe that the crest of the wave is moving from one location to another location over a given interval of time.

The crest of the wave is observed to measure distance. The speed of an object is the measure of how fast an object is moving and is usually expressed as the distance traveled per time of travel.

v = λ × f

where, v = speed or velocity of the wave,

λ = wavelength of the wave,

f = frequency of the wave

f = 1/ time period = 1/ 0.2 = 5 s⁻¹

v = λ × f

v = 10 × 5

v = 50 m/s

Therefore, the speed of the wave is 50 meters per second.

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Answer:

m

Explanation:

The kind of nuclear reaction that have been shown by the equation is a nuclear fission reaction.

The splitting of atomic nuclei, specifically heavy nuclei like uranium-235 (U-235) or plutonium-239 (Pu-239), is known as nuclear fission. The process involves splitting an atom's nucleus into two or more smaller nuclei, which releases a considerable quantity of energy.

A heavy nucleus is neutron-bombarded to start the fission process. The nuclear excitation process occurs when the nucleus becomes unstable after absorbing the neutron. The nucleus splits into two or more smaller nuclei as a result of this excitation, releasing more neutrons and a significant quantity of energy.

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Answer:

The methodology employed by Galileo contributed to the development of Physics by find moons of Jupiter. (I think)

sorry if it's wrong

Answer:

yes

Explanation:

Answer:

metre

Explanation:

the metre is the standard unit of measurement for those distances

When very dense material is heated, it produces a continuous spectrum. A continuous spectrum is an electromagnetic radiation that displays a continuous range of wavelengths or colors.

The spectrum has no gaps or breaks and is seen as a smooth, unbroken band of colors that blend into each other.A continuous spectrum is created by solids, liquids, and dense gases when heated. The molecules in these materials begin to move around more quickly when they absorb thermal energy.

As a result of this motion, the electrons in the atoms within the material are excited to higher energy levels.This means that the electrons move from lower energy levels, which are closer to the atomic nucleus, to higher energy levels, which are further away from the nucleus. When the electrons transition back to their lower energy states, they release energy in the form of electromagnetic radiation.

The radiation that is released includes a continuous range of wavelengths, which produce a continuous spectrum.Continuous spectra are important in astronomy because they help scientists learn about the temperatures of the objects producing the radiation. By analyzing the spectrum, they can determine the temperature of the object.

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It is a 2:1 ratio of ey, final, the maximum value of the y-component of the electric field immediately following the last polarizer, to eo, the amplitude of the electric field oscillations in the incident polarized beam.

What is a ratio?

A ratio is the divisional comparison of two numbers.

We may find the ratio by dividing the second output by the first output, which corresponds to the first two outputs, or -1/8 and -1/4:

-1/4-1/8

We multiply by the reciprocal when dividing fractions:

-1/4x-8/1

When multiplying fractions, multiply across the board:

(-1x-8)/(4x1) 8/4=2

A ratio is a comparison of two or more numbers in mathematics that shows how big one is in comparison to the other. A ratio divides two amounts into equal parts, with the dividend or antecedent serving as the unit of comparison and the divisor or unit of comparison serving as the unit of comparison.

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Let's see the chemical equation

\(\\ \sf\longmapsto KI+Pb(NO_3)_2\longrightarrow PbI_2+KNO_3+\Delta H\)

Answer: the person above is wrong

the correct answers are:

E

F

A precipitate forms.

The color changes.

Answer:

we know that

ke=1÷2×mv^2

and when speed become triple of original then new speed become 3v

then,new ke=1÷2×m(3v)^2

=1÷2×9mv^2

9×original ke

hence ke will increase by 9 times

Answer:

none of the above or screwdriver

The moon remains in orbit around earth because of gravitational energy

Data;

Moon and other centripetal bodies maintain a state of constant orbit or centripetal acceleration because of gravitational energy.

The gravitational energy acting on the moon keeps the body rotating. This is further elaborated by Einstein's theory of relativity.

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Neutral atoms must contain equal numbers of option (1) protons and electrons.

Protons carry a positive charge, while electrons carry a negative charge. In an electrically neutral atom, the positive charge of the protons is balanced by the negative charge of the electrons, resulting in a net charge of zero.

The balance between the positive charge of protons and the negative charge of electrons is essential for maintaining the overall neutrality of an atom. If the number of protons and electrons is not equal, the atom becomes charged and is referred to as an ion. Understanding the requirement for an equal number of protons and electrons in neutral atoms is fundamental to the study of atomic structure and the behavior of elements in chemical reactions.

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Answer:

F = 8840.7 N

Explanation:

The parameters given are:

Length L = 3 metres

Extension e = 3 × 3 = 9m

Force constant K = 982.3 Newton per metre​

From Hook's law,

Provided the elastic limit is not extended, the extension is directly proportional to the force applied.

That is,

F = Ke

Substitute all the parameters into the formula

F = 982.3 × 9

F = 8840.7 N

The block will oscillate back and forth along the horizontal surface with a period given by the equation $T = 2\pi\sqrt{\frac{m}{k}}$,

where $m$ is the mass of the block, $k$ is the force constant of the spring, and $T$ is the period of the oscillation. In this case,

the mass of the block is 150 g, which is equivalent to 0.15 kg, and the force constant of the spring is 3.2 N/m.

Plugging these values into the equation, we get

$$T = 2\pi\sqrt{\frac{0.15}{3.2}} \approx 0.3268\text{ s}$$

The amplitude of the oscillation is equal to the maximum displacement of the block from its equilibrium position, which in this case is 3.0 cm. The block will oscillate back and forth with this amplitude and with a period of approximately 0.3268 seconds.

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C. Each ofthe Jovian planets has detectable rings surrounding their

equators - is  true regarding rings surrounding the Jovian planets.

Describe about Jovian planets

The gigantic planets are a variety of planets that are substantially bigger than Earth. Massive solid planets can exist, although often they are made mostly of low-boiling-point substances (volatiles), not of rock or other solid material. They are sometimes referred to as "jovian planets," named after Jupiter.

All other planets in the solar system are smaller than the Jovian planets, which also have a huge number of moons. Jupiter, Saturn, Uranus, and Neptune are the four Jovian planets, and they all have rings. The rock, ice, and dust particles that make up these rings range in size from microscopic to residential-sized.

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Answer:

ω = dΘ / dt

dΘ / dt = d (3 t^2 + 2 t) / dt = 6 t + 2

At 4 sec       ω = 6 * 4 + 2 = 26 / sec

V = ω * R = 26 / sec * 2 m = 52 m/s

Answer:

d. She will be slightly lower than you but moving upward toward you.

Explanation:

Since your swing is slightly shorter than your friend's swing, then you will have more angular speed than your friend. Angular speed increases with a decrease in radius. The closer the body is to the center, the faster the body swings. By the time you would have completed one complete swing back and forth, your friend will just be moving towards you, and she will be slightly lower than you but moving upwards towards you. This principle is the same reason gymnasts pull their limbs closer to their body when they need to swing faster.

Electronic Configuration:

Normally, the electronic configuration will be written through the atomic number of the particular element. The electrons fill in this accruing to the energy level and orbitals like s, p, d, and f

The atomic number for the Beryllium is 4. So, the electronic configuration of beryllium is

In option B, the s block has two electrons and both are having an upward spin orientation. This is incorrect, as one must be in the upward orientation and the other will be in the downward orientation

Answer:

D: The Moon's orbit is tilted compared

to Earth's orbit, so Earth is not in the

Moon's shadow most months.

The magnitude of the force (in n) that the third block applies on the second block is 140N

To determine the magnitude of the force that the third block applies on the second block, we first need to find the acceleration of the blocks.

Using Newton's Second Law (F = ma), we can calculate the acceleration of the smallest block:

35 N = 5 kg * a

a = 7 \(m/s^{2}\)

Since the second and third blocks are connected by a rope, they will have the same acceleration as the smallest block.

Next, we can calculate the force that the third block applies on the second block using the equation F = ma:

F = 20 kg * 7 \(m/s^{2}\)

F = 140 N

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In a binary star system consisting of two stars of equal mass, the gravitational potential is equal to zero at the barycenter.

The barycenter is the center of mass of the two stars and is the point around which they orbit each other. It is the point where the gravitational forces of both stars cancel out, resulting in a net gravitational force of zero.

The barycenter is often located closer to the more massive star, but in a binary system with equal masses, it would be located halfway between the two stars.

This point is important for understanding the dynamics of the binary system, as it determines the path of each star's orbit around the other. The barycenter is also used to study exoplanets and their orbits around their host stars.

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The rise in temperature of the iron part of the machine is approximately 9.6°C.

Heat transfer is the movement of thermal energy from one object or system to another due to a temperature difference. Thermal energy, which is the energy associated with the motion of particles within a substance, always moves from higher temperature regions to lower temperature regions until thermal equilibrium is achieved.

To calculate the rise in temperature of the iron part of the machine, we can use the following formula:

Q = m × c × ΔT

where Q is the heat absorbed by the iron part of the machine, m is the mass of the iron part, c is the specific heat capacity of iron, and ΔT is the rise in temperature.

First, we need to calculate the heat generated by the machine in 2 minutes, using its input power and efficiency:

P = 2 kW

Efficiency = 80% = 0.8

t = 2 minutes = 120 seconds

Energy generated by the machine = P × t × efficiency

Energy generated by the machine = 2 kW × 120 s × 0.8

Energy generated by the machine = 192 kJ

Next, we can calculate the mass of the iron part of the machine using its density:

Density of iron = 7.87 g/cm³ = 7870 kg/m³

Mass of iron part = 40 kg

Now, we can substitute the values into the formula and solve for ΔT:

Q = m × c × ΔT

ΔT = Q / (m × c)

ΔT = 192000 J / (40 kg × 500 J/kgK)

ΔT = 9.6°C

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The given options to the question must also include 9.6°C.

Answer:

A manometer is a device similar to a barometer that can be used to measure the pressure of a gas in a vessel. An enclosed pressure gauge is a U-shaped tube with one arm closed, another arm that connects to the electricity to be measured, and a permanent liquid (usually mercury) in between.

The volume of a sphere with radius r is V = (4/3)πr³, and the surface area of the sphere is S = 4πr². T

Given a sphere with radius r, the  answer is: The volume of the sphere is V = (4/3)πr³.

The surface area of the sphere is S = 4πr².

The volume of a sphere is the amount of space inside a sphere. To determine the volume of a sphere, we use the formula:V = (4/3)πr³Where "r" is the radius of the sphere.

So, the volume of the sphere is V = (4/3)πr³.

The surface area of a sphere is the sum of all of its surface areas. To determine the surface area of a sphere, we use the formula:S = 4πr²Where "r" is the radius of the sphere.

So, the surface area of the sphere is S = 4πr².\

In conclusion, the volume of a sphere with radius r is V = (4/3)πr³, and the surface area of the sphere is S = 4πr². The given sphere is a 3-dimensional object that has a circular boundary. To find the volume and surface area, we have used the above formulas, which involves only the radius "r" of the sphere.

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Answer:

No

Explanation:

Your answer will be no because Mars has less gravity then Earth does but you would still have the same amount of mass therefor If someone goes to Mars and goes back to Earth they would not weigh the same as they did on earth.Hope it helps you!

Answer:

Im gonna say it is answer A:) Hope this helps!

Explanation:

The maximum current in the inductor is approximately 1.21 amperes when a 5.05 μF capacitor initially charged to 15.2 V is connected in series with a 3.75 mH inductor.

To determine the maximum current in the inductor when a 5.05 μF capacitor initially charged to a potential of 15.2 V is connected in series with a 3.75 mH inductor, we can use the formula for the resonant frequency of an LC circuit.

The resonant frequency (fr) of an LC circuit is given by:

fr = 1 / (2π√(LC))

Given:

C = 5.05 μF = 5.05 × \(10^{-6}\)F

L = 3.75 mH = 3.75 × \(10^{-3}\) H

Plugging the values into the formula:

fr = 1 / (2π√(5.05 × \(10^{-6}\) × 3.75 × \(10^{-3}\)))

  = 1 / (2π√(1.89125 ×\(10^{-8}\)))

  ≈ 530,012 Hz

The maximum current (Imax) in the inductor can be calculated using the formula:

Imax = V / Xl

Where:

V is the initial potential (voltage) across the capacitor (15.2 V), and

Xl is the inductive reactance.

The inductive reactance (Xl) is given by:

Xl = 2πfL

Plugging the values into the formula:

Xl = 2π(530,012)(3.75 × \(10^{-3}\))

  ≈ 12.556 Ω

Plugging the values into the formula for Imax:

Imax = 15.2 V / 12.556 Ω  ≈ 1.21 A

Therefore, the maximum current in the inductor is approximately 1.21 amperes.

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Answer:

-4500 N

Source: Brainly

The police officer must be angry 0_0