Help!!! 23 points label these as Element, compound, mixture of elements, and mixture of compounds

Thermonuclear fusion occurs faster in massive stars so larger stars use up all their fuel in less time.

The more mass a star has the faster it will exhaust its fuel supply and the shorter its lifespan. The most massive stars could burn up and explode in a supernova after just a few million years of nuclear fusion. Massive stars are the largest, hottest, and brightest main-sequence stars and are blue, blue-white, or white in color.

Massive stars run out of hydrogen fuel very quickly and therefore have short lives. This is because the more massive the star the greater the fuel consumption. Even if a high-mass star has more fuel it uses it up very quickly so it does not live as long as a low-mass star. A main-sequence star's mass determines the fundamental properties of its luminosity surface temperature radius and lifetime.

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The common speed in mph of the combined piece right after the collision was 30 mph. The cars move towards the lighter car.

An inelastic collision is a collision in which there is no internet loss in kinetic energy within the gadget because of the collision. each momentum and kinetic electricity are conserved portions in elastic collisions.

Calculation:-

50 mph = (50 × 0.477)

    = 22.35

   Applying the law of conservation of momentum.

we get the:-

m₁u₁ + m₂u₂ = (m₁ + m₂)V

V = m₁u₁ + m₂u₂/(m₁ + m₂)

   = 4000 × 22.35 + 1000 × (-22.35) / 4000 +1000

V = 13.41 m/s

 = 13.41/0.447

= 30 mph

Hence, the common speed of the car is 30mpH.

An inelastic collision is a come between two bodies in which the full kinetic energy of the two bodies remains equal. In an ideal, perfectly elastic collision, there may be no internet conversion of kinetic strength into other kinds which includes heat, noise, or capacity electricity.

Elastic collisions arise whilst both the momentum and kinetic energy are conserved, just like how billiard balls bounce off each different and move at the same speeds as earlier. Inelastic collisions appear whilst simplest the momentum is conserved but not the kinetic power.

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By using components of the centripetal force, it can be calculated as Radius of the curvature of the track is 557.5 m

According to the centripetal force, the force is

[tex]F_{c} = \frac{mv^{2} }{r}[/tex]

where m is the mass of the object , v is the velocity and r is the radius of the curvature.

This Fc will have two components, FccosФ and FcsinФ.

FccosФ = mg

1.1 mgcosФ = mg

cosФ = [tex]\frac{1}{1.1}[/tex]

so, sinФ = 0.416

Now, FcsinФ = [tex]\frac{mv^{2} }{r}[/tex]

1.1mgsinФ = [tex]\frac{mv^{2} }{r}[/tex]

r = 557.478

r = 557.5 m

Hence the radius of the curvature is 557.5 m.

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The energy an object has as a result of motion is known as kinetic energy.A force must be applied to an object in order to accelerate

Given,

m1 = 3 kg

Mass, = 3kg

Speed, = 30 m/s

u2= 0

= 1 kg

Speed after collision = 6 m/s

Kinetic energy lost, K×E = ?

During collision, momentum is conserved.

Before collision, the kinetic energy is

KE =1/2(3)*(3)*(30)+1/2*1*(0)²

KE=1/2*4*25+0

By plugging in the values we get,

K×E = 50 J

Therefore, kinetic energy before collision is 50 J

Kinetic energy after collision:

KE =1/2(4+1)+KE

KE = 40J+KE

Since,

Initial Kinetic energy = Final kinetic energy

50J=40J+K*E

50 J = 40 J + K×E(lost)

K×E(lost) = 50 J - 40 J

K×E(lost) = 10 J

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The period of the  object undergoing simple harmonic motion   is

simple harmonic motion sometime shortened as SHM may be a sort of periodic movement where the restoring drive on the moving object is straightforwardly relative to the magnitude of the displacement of the object and acts towards the object's equilibrium position. It comes about in an oscillation that proceeds inconclusively, on the off chance that uninhibited by friction or any other dissemination of energy.

we are given the time taken to complete the distance covered between two  zero velocity  points apart from the distance of   41.6 cm which is  0.12 so the period  will be  = 2T = 2 * 0.12 = 0.24 s

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The magnitude and direction of the sum of vectors will be 4.15 m aligned in  50° in north west direction.

Both the vectors are making angle in a way that it will add up to 90° , hence a right angles triangle will be formed .

using Pythagoras theorem

[tex]H^{2} = P^{2} + B^{2}[/tex]

sum of vector = [tex]H^{2} = P^{2} + B^{2}[/tex]

H = [tex]\sqrt{P^{2} + B^{2} }[/tex]

   = [tex]\sqrt{3.14^{2} + 2.71^{2} }[/tex]

   = 4.15  m

let theta is the angle along the base vector 2

tan (theta ) = P/B = 3.14 / 2.71 = 1.16 °

theta = [tex]tan^{-1}[/tex] ( 1.16 )

         ≈ 50°

hence , The magnitude and direction of the sum of vectors will be 4.15 m aligned in  50° in north west direction.

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The dielectric constant of the wax is 2.

The dielectric constant of wax is the ratio of the capacitance of a capacitor that has wax between its plates to its capacitance when there is no wax between its plates.

This can be calculated by first finding the total capacitance of the capacitor with wax in between it:

C = 2 * pf * (0.5cm)^2

= 1.5 pf

Then, we can calculate the change in capacitance:

C' = C - C

= 2 pf * (0.5cm)^2 - 1.5 pf

= 0.5 pf

Finally, we divide 1/0.5 to find C'/C = 2, so we conclude that the dielectric constant for wax is 2, or twice as large as air's dielectric constant of 1!

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The event horizon of a black hole, the region beyond which there is no return, is the zone from which no light of any sort, including X-rays, can escape. Black hole research telescopes operated by NASA.

Are examining the black holes' surroundings, which contain material that is quite near the event horizon. A black hole is an area of spacetime where gravity is so intense that nothing can escape from it, not even electromagnetic radiation like horizon. A sufficiently compact mass can distort spacetime to generate a black hole, according to general relativity theory.

A black hole is a compact, dense object whose gravitational attraction is so powerful that nothing can escape from it up close, not even light.

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Answer:

a = 6.27 m/s² - acceleration

Explanation:

Given:

F = 9 079 N

m = 1 447 kg

_________

a - ?

Acceleration:

a = F / m

a = 9 079 / 1 447 ≈ 6.27 m/s²

A rock is tossed straight up from a height of 1.20 m above the ground with an initial speed of 7.54 m/s. It will take 0.15 seconds to hit the rock ground

height = displacement = 1.20 m

initial speed = u = 7.54 m/s

final speed = v = 0

time = ?

Using kinematic equation

s = u*t + 1/2 * g * [tex]t^{2}[/tex]

1.20 = 7.54 t + 1/2 * 9.8 *  [tex]t^{2}[/tex]

= 4.9  [tex]t^{2}[/tex] + 7.54 t  - 1.20

t = 0.15 seconds

It will take 0.15 seconds to hit the rock ground

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Answer:

false is the answer . in my point of view

The phase angle between the voltages of the inductor and capacitor in a RLC series circuit is 180 degrees.

RLC circuit contains resistor , capacitor and inductor. Resistor doesn't store energy but capacitor and inductor stores energy and that is the reason resistor is called a passive element and inductor and capacitors are called active element.

Inductor leads the current by a phase angle of 90 degrees and the voltage across the capacitor lags the current by 90 degrees, so the phase difference between the voltages of the inductor and the capacitor is 180 degrees in an LCR circuit.

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Option C, Since there is no refraction and light travels in almost the same direction in both the glass as well as the unknown liquid, their indexes of refraction are identical.

Moving from the atmosphere to the glass causes the light to slow down. A prism's angle is 60 degrees, and its green light refractive index is 1.5.

The many media, or matter particles, through which light passes were used to gauge both its speed and how it appears to the human eye. To discern the different light wavelengths, the speed should slow down when the white light is revealed via the prism.

The following formula is used to get the refractive index:

n₁ sinθ₁  = n₂sinθ₂  

where n₁ and n₂ represent the observed difference and represent the diffraction pattern between two liquids.

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When light passes through the first filter then it will also pass through the second filter. All of the light will pass through both filters.

Polarization:

Polarization is a property applied to transverse waves that specify the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave.

When the axes of the first and second filters are aligned (parallel), then all of the polarized light passed by the first filter is also passed by the second. If the second polarizing filter is rotated, only the component of the light parallel to the second filter's axis is passed.

Therefore all the light will pass through both filters.

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The capacitance and electric potential of the two capacitors are identical.

The charge stored and energy stored are also identical, as are the two capacitors' dielectrics.

The reason for this is that both capacitors have the same area, which is equal to the product of their radii multiplied by the distance between them. The two capacitors also have the same charge per unit area. So when you divide one by the other, you get a ratio of 1:1. This means that regardless of which capacitor you choose, it will store an equal amount of energy.

Additionally, if you choose to measure your capacitance by dividing your electric potential by your charge per unit area, then again, both capacitors will have identical values for this metric as well.

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It is accurate to say that the Mercalli, Richter, and magnitude scales are the three main scales used to measure earthquakes. These three scales were used to gauge the earthquake's seismic waves.

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Suppose a car travels at a constant 10 m/s.

using d = vt

v = 10m/s.

t                                    d

1 hr= 3600s                3.6x [tex]10^{4}[/tex]m

1 min = 60s                  6.0x [tex]10^{2}[/tex]m

1s                                  10m

1ms = [tex]10^{-3}[/tex] s                 10 x[tex]10^{-3}[/tex]m = 10mm

1μs = [tex]10^{-6}[/tex]s                  10x [tex]10^{-6}[/tex]m =  10μm

1ns = [tex]10^{-9}[/tex]s                   10x [tex]10^{-9}[/tex]m = 10 nm

something immutable or unchangeable: eg; a number having a definite value in a particular situation or universally, or a characteristic of some substance or instrument. : a number that is expected not to change value in a given mathematical discussion a term with fixed notation in logic.

A constant can be defined as a fixed value used in algebraic expressions and equations. A constant does not change over time and has a fixed value. For example, the size of a shoe, fabric or any accessory does not change at any time.

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The immune system is a complex network of organs, cells, and proteins that protect the body's own cells while defending it against infection.

The immune system keeps a record of every germ (microbe) it has ever defeated in order to quickly recognize and destroy the microbe if it re-enters the body.

The immune system, unlike the heart or the brain, does not have a centralized location in the body. Instead, immune system cells are produced in organs throughout the body, including the tonsils, lymph nodes, spleen, bone marrow, and adenoids.

Our immune system also weakens with age, as immune system tissues shrink and our white blood cell count and activity decrease.

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The formula for the relationship between the electric and magnetic fields is:

E = cB

As the amplitude of the electric field is precisely proportional to the magnetic field, the magnetic field will also double in size when the amplitude of the electric field doubles.

Radio waves typically operate at frequencies between 300 gigahertz and below, where the longest wavelengths of the electromagnetic spectrum are found. At 300 GHz, the corresponding wavelength is 1 mm; nevertheless, at 30 Hz, it is 10,000 kilometers.

A magnetic field, a vector field that affects an electric charge, an electric current, and magnetic materials magnetically. In a magnetic field, a moving charge experiences an external force that is perpendicular to the magnetic field and has its own velocity.

The maximum electric and magnetic field strength is known as the amplitude in electromagnetic waves. The wave amplitude determines the energy of the wave. Similar to how waves themselves move, the energy density also follows the electric and magnetic fields.

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The GPE that the barbells have at max height is ,

3680.h j=11,000 units

where h= maximum height the barbells were lifted

work done by the championship lifter ,W = 11,000 units

weight of the barbells, N = 3680 N

The gravitational potential energy, P.E., the barbells had at their maximum height of lift is given as follows;

P.E. = m × g × h

Where;

m = The mass of the barbells;

g = The acceleration due to gravity = 9.8 m/s^2

h = The maximum height to which the barbells are lifted

m × g = The weight of the barbells = 3680 N

∴ P.E. = 3680 N × h = 3680·h J

we know the law of conservation of energy, according to this the work done by the weight lifter is equals to the maximum gravitational potential energy gained by the barbell is equal to energy at maximium height i.e P.E

therefore, GPE = 3680.h j = W = 11,000j is your answer.

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The weight of box 2 and box 3 is 33.72N and 15.32N

According to Lami's Theorem, if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two forces. The magnitudes of concurrent, coplanar, and non-collinear forces that keep an object in static equilibrium are all related to Lami's Theorem. This theorem also aids in the analysis of most mechanical and structural systems. For all three forces used in Lami's Theorem, the proportionality constant is the same.

Given box1 weighs 31N

Given two angles 63 and 24

So the third angle will be

180 – 87

= 93

By using Lamis theorem

T_2/(SIN 93)=T_3/(SIN (90+63))=T_1/(SIN (90+24))

Here T1 = 31N

Weight of box 2 = w2 = 31/cos24 x sin 93

= 33.72

Weight of box 3 = w3 = 31/cos24 x cos 63

= 15.32

Therefore the weight of box 2 and box 3 is 33.72N and 15.32N

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The wavelength of the radiation is 2.93×10⁻⁷ m

Given,

The energy of photon E=6.78×10⁻¹⁹

now, E=hc/λ

λ=hc/E

=6.626×10⁻³⁴×3×10⁸/6.78×10⁻¹⁹

=2.93×10⁻⁷ m

Radiation is the emission or transmission of energy through a material medium or across space in the form of waves or particles.

According to the energy of the radiated particles, radiation is frequently classified as either ionizing or non-ionizing. Ionizing radiation has an energy level of more than 10 eV, which is sufficient to ionize atoms and molecules as well as rupture chemical bonds. Due to the significant difference in how destructive it is to living things, this is a crucial distinction. Ionizing radiation is frequently produced by radioactive substances that release radiation in the form of helium nuclei, electrons or positrons, or photons, respectively.

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The two intertwined autos are sliding on the ice at a 3.46 m/s post-collision speed.

The principle of momentum conservation argues that within a given problem domain, momentum is never created nor destroyed but only modified by the action of forces as they are represented by Newton's laws of motion.

According to the rule of conservation of momentum, absent an external force, the combined momentum of two or more bodies operating upon one another in an isolated system remains constant. As a result, momentum cannot be gained or lost.

The speed of the Mazda before the accident multiplied by the mass of the Mazda must match the speed after the collision multiplied by the mass of both cars, according to the property of conservation of momentum:

m1v1 = m1 + m2 *v2

940*12.5 = 940 +2460 *v2

v2 = 3.46 m/s

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double the luminous flux of the light source is a way to exactly double the illuminance on an object.

The electromagnetic radiation that the human eye perceives as light, or visible light, is found in the region of the electromagnetic spectrum. Typically, visible light is characterized as having wavelengths between 400 and 700 nanometers (nm), or frequencies between 750 and 420 terahertz, which are intermediate between the infrared and ultraviolet (with longer wavelengths) (with shorter wavelengths).

The term "light" can be used more generally in physics to refer to electromagnetic radiation of any wavelength, whether or not it is visible.

This makes gamma rays, X-rays, microwaves, and radio waves also constitute light. Intensity, the direction of propagation, frequency or wavelength spectrum, and polarization make up the fundamental characteristics of light. One of the basic constants of nature is its speed in a vacuum, 299 792 458 meters per second (m/s).

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The object's kinetic energy is proportional to its mass.

By doubling the mass kinetic energy the roller coaster car's kinetic energy is also doubled.

In physics, an object's kinetic energy is the energy it has as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a given velocity. Unless the body's speed changes, it retains its kinetic energy after gaining it during acceleration. The body does the same amount of work when slowing down from its current speed to rest. Formally, kinetic energy is any term in a system's Lagrangian that includes a time derivative.

Gottfried Leibniz and Johann Bernoulli established the principle in classical mechanics that by describing kinetic energy as the living force, vis viva. The Netherlands' Willem's Gravesande provided experimental evidence of this relationship.

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Answer: an upward-sloping line drawn on a graph with acceleration shown on the y-axis and force shown on the X-axis

just took the test

an upward-sloping line drawn on a graph with acceleration shown on the y-axis and force shown on the X-axis best describes a graph that would represent the relationship shown in the table

A graph is represented as pictorial form  the of data or numeric values in an organized manner which enables user to represent large amount of data in visual form.

There are 2 types of questions and the features of graphs are interpretation of given graphs or selecting a graph based on a verbal description.

The bar graphs are the most common type of graph, other graphs are dot plots, histograms, line graphs and scatterplots.

A Bar Graph is represented as the graphical display of data using rectangular bars of different parameters like heights, The structure can be represented  in the y axis contains values, and the x axis contains categories or time periods.  

A dot plot is a simple graphical representation  which shows the frequency with which items appears in a data set and present data on the x axis.

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The speed of the sled after it has travelled a distance 3.58 meter is 2.96m/s.

Mass of sled = 2.49kg

Initial speed across the horizontal surface = 4.53m/s

Coefficient of kinetic friction between the slate and surface = 0.168

Distance = 3.58m

Now to calculate the acceleration of sled we use :

F = ma

a = F/m

where

a = acceleration

m = mass

F = frictional force

a = μmg / m

a = μg

a = 0.168 x 9.8

a = 1.64m/s²

To calculate the speed of sled we use:

v² = u² - 2as

v² = (4.53)² - 2x 1.64 x 3.58

v² =  8.7785

v = 2.96m/s

The speed of the sled after it has travelled a distance 3.58 meter is 2.96m/s.

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The cylinder will reach the bottom first.

In this case, the body acceleration should be applied to the incline.

Therefore, the equation listed below should be utilized.

gsin / (1 + k2 / r2) = a

Here

K is the gyrating radius.

r is the radius, and

Now

in hoop

k = r

gsin / (1 + r2 / r2) equals a.

= g / 2 x sinθ

0.5 gsinθ

as cylinder

k² = r² /2

A is equal to gsin / (1 + r2 /2 r2).

= 2 / 3 g sinθ

= .67 g sinθ

We can observe that the cylinder is more responsible for the acceleration.

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