Use the diagram to answer the question

Based on the diagram, which statements about stellar evolution are true? Select the two correct answers.

Massive stars evolve more slowly than average stars.
Massive stars evolve more quickly than average stars.
Average stars evolve more slowly than massive stars.
Massive and average stars evolve at about the same speed.
Average stars evolve more quickly than massive stars.

SOME ONE PLEASE HELP!! Earth Science

According to the first law of thermodynamics, the total energy of a system, including its surrounds, is conserved if heat is acknowledged as a kind of energy.

The study of thermodynamics looks at the connections between heat, work, temperature, and energy. The movement of energy from one place or form to another is the main focus of thermodynamics. The underlying concept is that heat is a form of energy that may be compared to a certain amount of mechanical work.

The heat was not formally recognized as a form of energy until around 1798, when British military engineer Count Rumford (Sir Benjamin Thompson) discovered that endless amounts of heat could be produced while boring cannon barrels and that the amount of heat produced is proportional to the work done while turning a blunt boring tool. Rumford's finding of the relationship between heat produced and work completed served as the theoretical cornerstone for thermodynamics.

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Bromine have two isotopes they are Br-79 and Br-81. these are the two stable isotopes.

So here from the given data, element bromine consists of Br₂ molecules. here they have given three mass spectrum peaks.

Mass spectroscopy detects ions of slightly different masses. the bromine molecules consist of two isotopes that is ⁷⁹Br and ⁸¹Br or maybe more combination of theses.

So from the given masses and and spectra we know that the two isotopes of bromine are ⁷⁹Br and ⁸¹Br. That's why they are given like that in the answer.

Isotopes are those elements which have same number of protons but different number of neutrons.

Because of this in part A the answer is given as  ⁷⁹Br, ⁷⁹Br and in part B it is given as ⁷⁹Br ,⁸¹Br. this is the common way of representing the mass number of an element.

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The uncertainty in the position, Δx, of an electron moving near the nucleus at 6.00×106 m/s is 7.24 x 10⁻¹⁰ m

Relative uncertainty is the measuring uncertainty fraction by the absolute value of the measured quantity value.

By Heisenberg uncertainty principle,

Δx x Δv = h/(4 xpi x m)

Putting the values in the formula

Δv = 8 x 10⁴ m/s

mass, m = 9.11 x 10⁻³¹ Kg

Putting values,

Δx x (8 x 10⁴) = (6.626 x 10⁻³⁴)/(4 x 3.14 x 9.11 x 10⁻³¹)

Δx x (8 x 10⁴) = 5.791 x 10⁻⁵

Δx = 7.239 x 10⁻¹⁰ m

Therefore, the uncertainty in the position is 7.24 x 10⁻¹⁰ m

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D. only the surface material reacts, so having the entire material be made of the catalyst is not necessary.

Increasing the surface area of a catalyst increases the frequency of collisions and increases the reaction rate.

Several smaller particles have more surface area than one large particle. The more surface area that is available for particles to collide, the faster the reaction will occur.

Thus, it is important way of utilizing the catalyst because only the surface material reacts, so having the entire material be made of the catalyst is not necessary.

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In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about -100 millivolts. So, the statement is false.

The fundamental units of all living things are cells. There are many billions of cells in a human body.

They give the body structure, consume nutrients from meals, transform those nutrients into energy, and perform certain tasks.

All bodily cells are polarised because they all have a resting membrane potential when they are at rest.

All body cells, depending on the kind of cell, have a resting membrane potential that normally ranges from -50 to -100 millivolts. All cells are considered to be polarised as a result.

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The peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser, the expected charges at pH 1, 7, and 13 is +3, +2, -1.

Peptides can be defined as a single linear chain of many amino acids, held together by an amide bonds. It can also be defined as a naturally occurring short chain of  amino acid monomer connected by an amide bonds.

The amino acid and other molecular are connected to one another in a sequence by a bond is called peptide bonds.

Peptides make bond and make certain proteins which are very essential for growth and development of human body.

In peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser ionizing groups are present.

There are four ionizing groups are present

Thus, the peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser, the expected charges at pH 1, 7, and 13 is +3, +2, -1.

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Answer:

B. Upbeat, Fast, Staccato

Explanation:

As with any chase between predator and prey, it's going to be fast-paced as both are literally running for their lives.

Answer:

31 N

Explanation:

The number of moles in 58.32 grams of CF₂Cl₂ is 0.48 mole

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

With the above formula, we can determine the mole in 58.32 grams of CF₂Cl₂ as illustrated below:

Mole = mass / molar mass

Mole of CF₂Cl₂ = 58.32 / 121

Mole of CF₂Cl₂ = 0.48 mole

Thus, we can conclude that 0.48 mole is present in 58.32 grams of CF₂Cl₂

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The interstitial alloy would be more dense than the pure metal.

Density is the ratio of the mass to the volume of an object. Now we know that the more dense the object is the more the atoms of the object are packed together.

An alloy is a combination of two or more metals. This implies that in an alloy we are certainly going to have more elements packed into a smaller space than in a pure metal. The pure metal contains only one type of atoms but the alloy contains more than one type of metal atoms packed into a small space.

Thus, the interstitial alloy would be more dense than the pure metal.

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Answer: I think its B

Explanation:

please lmk if I'm wrong.

The wavelength that is sufficient to ionize the helium atom is 510 nm.

Let us recall that the ionization energy is the energy that is required to remove an electron from an atom. The first ionization energy is the energy that is required to remove the first electron from an atom. The electron is often removed from the valence shell of the atom.

We have the following information;

Energy of the electron =  2.37×10^3 kJ/mol  * 1 mole/6.02 * 10^23

= 3.9 * 10^-18 J

Now;

E = hc/λ

E = energy of the photon

h = Plank's constant

c = speed of light

λ = wavelength

λ = hc/E

λ = 6.6 * 10^-34 * 3 * 10^8/3.9 * 10^-18 J

λ = 5.1 * 10^-8 m or 510 nm

Hence, the wavelength that is sufficient to ionize the helium atom is 510 nm.

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Answer:

1-

Explanation:

the charge of an atom is determined by the number of protons and electrons present, in this case the number of electrons is more than the protons by 1, hence it is a minus 1 charge

For different order Kinetics the lineer graph is different plots.

For Zero order reaction, the integrated rabe law is

[A] = [A]₀-Kt            K =rate constant

[A] vs t graph is straight line with slope = -k

For first order reaction, the integrated rate law is

In [A] = In [A]o - Kt

In [A] vs t graph is straight line with slope = -K

For second order reaction, the integrated rate law is

1/[A]= 1/  [A]o + Kt

1/[A] vs t graph is straight  line with slope = +k

So, for all cases the slope of straight line is either +k or -K.

k'is rate constant only depends on temperature not on concentration of reactant.

So the slope will not change for Trial II with 0.2m Naoh.

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Answer:

al - al  i think

Explanation:

The correct match is as follows:

Pressure and heat - Metamorphic rock

Cooling magma - The Intrusive igneous rock

Cooling lava - The Extrusive igneous rock

Erosion and Deposition - Sedimentary rock

This is because Metamorphic rocks are formed as a result of past existing rocks changing form. If the igneous and sedimentary rocks are exposed to high temperature and pressure, they then become metamorphic rocks.

Intrusive igneous rocks form when magma cools slowly. This process soon results in the formation of large-crystal like structures. Whereas, when exposed to the atmosphere lava cools rather quickly. This faster cooling process forms extrusive igneous rocks. The fast cooling lava creates smaller crystals and a smoother surface.

The sediments that are formed as a result of weathered rocks are usually deposited on the surface of Earth, or at the bottom of rivers and oceans. Over time, sediments collect and form layers over the most recent layer. This leads to the formation of sedimentary rocks.

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Answer:

I believe this is your answer, or wait I know this is your answer

Explanation:

Kc for the hypothetical reaction is 1.5×10⁻⁵

Kc is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients.

Given reaction is

4M(g) ⇄ 2Z(g)  Kc =6.58×10⁻³

2Z(g) ⇄ 4Q(g)+8X(g) Kc =2.07×10⁻²

So for finding another Kc of that given reaction is Q(g)+2X(g) ⇄ M(g)

To find Kc the formula is [M]m/[Q]q[X]x for Q=8.66

Put the given value 6.58×10⁻³/8.66×2.07×10⁻²

= 1.5×10⁻⁵

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Answer:

1600 microliters

Explanation:

µl =mL ÷ 0.0010000 so 1.60÷0.00010000=1600

The molarity of a 0.600 mol of BaCl₂ in 100.0 mL of solution is 6M.

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

The molarity of a solution can be calculated by dividing the number of moles by the volume as follows:

Molarity = no of moles ÷ volume

According to this question, 0.600 moles of BaCl₂ in 100.0 mL of solution. The Molarity can be calculated as follows:

Molarity = 0.600 mol ÷ 0.100 L

Molarity = 6M

Therefore, the molarity of a 0.600 mol of BaCl₂ in 100.0 mL of solution is 6M.

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Answer:

The frequency is the rate at which current changes direction per second.

The number of  particles of Al³⁺ present in the given compound is  1.76 x 10²¹ ions.

The mass of the aluminum ion in the given compound is calculated as follows;

Al₂(SO₄)₃  ⇄ 2Al³⁺ + 3SO₄²⁻

mass of Al₂(SO₄)₃ = 342.15 g

number of 0.5 g = 0.5/342.15 = 0.00146 mole

from the reaction equation above;

1 mole of Al₂(SO₄)₃  = 2 moles of Al³⁺

0.00146 mole = ?

= (0.00146 x 2)/1

= 0.00292 mole

1 moles of ion = 6.02 x 10²³ particles

0.00292 moles = ?

= 1.76 x 10²¹ ions

Thus, the number of  particles of Al³⁺ present in the given compound is  1.76 x 10²¹ ions.

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3.699×10²⁷  quanta are required to supply 7.06×10⁴ J of energy.

Quanta of energy is calculated by using the Planck's equation which is given as,

E=hυ

where E= energy of radiation

h=Planck's constant

υ=frequency of radiation

Number of quanta can be calculated as.

=energy of radiation/energy required

As per the given data,temperature is not required in solving the problem

required energy =7.06×10⁴

microwave frequency=2.88×10¹⁰s[tex]^-1[/tex]

Energy of radiation is calculated by using Planck's equation,

=6.626×10[tex]^-34[/tex]×2.88×10¹⁰=19.082×10[tex]^-24[/tex] J.

Number of quanta required=7.06×10⁴/19.082×10[tex]^-24[/tex]=3.699×10²⁷

Hence, the number of quanta required is 3.699×10²⁷.

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If a soccer ball's mass is 5 kg and a player who weighs 50 kg kicks the soccer ball forward with a force of 5 N ,  5 N force does the ball exert on the player's foot and in backward direction .

The four forces are gravity, normal force , friction force, and applied force. When the ball is kicked or kicked by player , when a player leaps into the air to avoid a tackle or grab the ball, and when a player leaps into the air to catch the ball , Force of Gravity is continuously at work in football .

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Answer:

Explanation:

1.) A car’s engine provides a forward force of 2000 N while the force of air resistance is 800 N in the opposite direction. With what force will the car move, and in which direction?

ANSWER: 1200 N forward

2.) Two movers are attempting to push a couch up a ramp. One mover applies a force of 80 N to the right, but the force of friction between the couch and the ramp is providing a force of 110 N in the opposite direction, and the couch slides down the ramp. At minimum, how much force will the second mover need to apply to help push the couch up the ramp?

ANSWER: 31 N

3.) A group of students conduct an experiment to study Newton’s second law of motion. They applied a force to a toy car and measure its acceleration. The table shows the results.

Force (N) Acceleration (m/s²)

2.0 5.0

3.0 7.5

6.0 15.0If the students graph the data points, which conclusion will they be able to make?

ANSWER: The data points will fall along a line. This shows that as the force increases, the acceleration increases.

4.) In the experimental setup shown, a car has one end of a string attached to it, and the other end is attached to a fixed number of metal discs. The car moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and velocity of the experiment. When looking at these results, which quantity stays constant during the trials?

ANSWER: mass

5.) Imagine a scenario in which an animal's force is pushing itself forward 5 N, friction is pushing it 4 N backward, gravity is pushing the animal 10 N down, and the animal is pushing itself 10 N up. Describe the movement of the animal.

ANSWER: It only moves forward because there is a net force forward.

6.) Two rockets with the same mass are accelerated. Rocket A accelerates twice as quickly as rocket B. Which statement is correct?

ANSWER: The motor in rocket A is twice as powerful as the motor in rocket B.

7.) A model rocket has a mass of 0.2 kg, with a motor that can provide a force of 100 N. A second model rocket is being built with the same motor, but it is being designed to accelerate half as much as the first rocket. What kind of change can be made in the design to achieve this objective?

ANSWER: The mass of the second rocket should be 0.4 kg.

8.) Five motorboats are being tested to see which reaches the highest velocity in the same amount of time. After graphing the acceleration versus force for each motorboat, the graph is a sloped line with a y-intercept of zero. Which statement is correct about these motorboats?

ANSWER: All five motorboats have the same mass, which can be calculated from the graph.

9.) If a soccer ball’s mass is 5 kg and a player who weighs 50 kg kicks the soccer ball forward with a force of 5 N , how much force does the ball exert on the player’s foot and in what direction?

ANSWER: 5 N backward

10.)

A toy helicopter flies forward with a force of 15 N into an oncoming wind of 10 N. The force of gravity pulls the helicopter down with a force of 5 N, but the propeller is providing an upward force of 10 N. Which of the following accurately describes the helicopter’s force?

ANSWER: The toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N.

11-15 are short answer questions but I hope this helps whoever needs it <3

For the given substance when thermal energy was applied the change of state that occurred was from solid to liquid, to gas state, and when heat was taken away from the substance, the substance moved from gas to liquid, to solid state.

Change of state refers to the process whereby matter changes from one state to another as heat is added or removed from a substance.

When heat is added to a substance, the particle changes from a more ordered state such as solid or liquid, to a less ordered state such as liquid or gas.

On the other hand, heat is removed from a substance, the particle changes from a less ordered state such as gas or liquid, to a more ordered state such as liquid or solid.

A give substance can exists either in the solid, liquid, or gaseous state depending on the temperature.

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