light of which of the following kinds is observed by earthbound telescopes? there are two right answers, and you need to give both of them. group of answer choices: a)gamma rays b) radio waves c) visible light d) x-rays

Answer:

sound waves

Explanation:

The kinetic energy of the meatball is transferred into the surroundings through sound waves.

When the meatball hits the wall, the kinetic energy of the meatball causes vibrations in the wall and the surrounding air. These vibrations create sound waves which transfers the kinetic energy to sound energy until it runs out of energy.

When an object / medium vibrates, the particle of the object / medium starts to move. This movement of particles is called as sound waves. It is a type of mechanical wave.

Therefore, the kinetic energy of the meatball is transferred into the surroundings through sound waves.

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The light travelling from sun to Jupiter in 43.33 minute.

Light can be define as, that it is electromagnetic radiation that can be detected by the human eye.

We are given that,

The distance from sun to Jupiter = d = 780 × 10⁵ km = 7.80 ×10¹¹m

The speed of light from the sun to Jupiter = v = 3.0 × 10⁸m/s

Therefore , to get the value of distance from sun to Jupiter by the equation is given as,

v = x/t

t = x/v

Where, t is the time taken by light from sun to Jupiter and x is the distance and v is shown speed of light from sun to Jupiter.

Then by putting the values in above equation we get,

t = (7.80 ×10¹¹m)/(3.0 × 10⁸m/s)

t = 2.6 ×10³ sec

t = (2.6 ×10³)/60 minutes

t = 43.33minutes

Thus, the light travelling from sun to Jupiter in 43.33minutes.

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Answer:

25 m/s

Explanation:

Momentum = mass × velocity

Given that,

velocity  = Momentum ÷ mass

velocity = 1800 ÷ 72

velocity = 25 m/s

The system that is colliding maintains its momentum. As a result, the ball B's speed is 2m/s (option -a) when it has the same mass as the ball A.

A body's capacity to produce the greatest displacement from an applied force is known as momentum. It is the result of adding mass and speed. The two bodies' total initial momentum and total final momentum are equal in a collision.

Consequently, let u be the starting velocity and v be the ending velocity.

m₁ u₁+ m₂ u₂ = m₁ v₁ + m₁ v₂

m₁ =  0.17 kg

u₁ = 4 m/s

m₂ = 0.17 kg

u₂ = 0

Then initial momentum = 0.17 × 4 m/s + 0 = 0.68 kg m/s

v₁ = v₁ cos 30° = 3.5×√3/2

v₂ = v₂cos 60 = v/2

0.68 kg m/s = (0.17 × 3.5×√3/2 ) +  (0.17 × v₂/2)

3.5×√3/2/2 + v₂/2 = 4

3.5√3 + v₂ = 8

then v₂ = 8-3.5(1.732)

v₂ = 1.94m/s. = 2m/s

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The term for a situation in which gas vapors ignite and return to the source of the vapors.This situation is known as a flashback.

Flashbacks occur when flammable gas vapors escape from a source and are ignited by a spark or flame, then travel back to the source and ignite the surrounding area. Flashbacks can cause explosions and fires, and are dangerous. To prevent flashbacks, people must ensure that all flammable gas sources are properly ventilated and that any sparks or flames are kept away from the gas.To avoid a flashback, the source of the fuel must be shut off and the area must be ventilated to reduce the concentration of the flammable gas or vapor.

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The term for a situation in which gas vapors ignite and return to the source of the vapors.This situation is known as a flashback.

Flashbacks occur when flammable gas vapors escape from a source and are ignited by a spark or flame, then travel back to the source and ignite the surrounding area. Flashbacks can cause explosions and fires, and are dangerous. To prevent flashbacks, people must ensure that all flammable gas sources are properly ventilated and that any sparks or flames are kept away from the gas.To avoid a flashback, the source of the fuel must be shut off and the area must be ventilated to reduce the concentration of the flammable gas or vapor.

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Directly proportional is: energy and frequency; Inversely proportional: wavelength and energy and frequency and wavelength.

(a) The wavelength and energy are inversely proportional to each other. This implies that as the wavelength of a wave increases, its energy decreases, and as the wavelength decreases,  energy increases.

(b) The frequency and wavelength are inversely proportional to each other. This implies that as  frequency of a wave increases, its wavelength decreases, and as frequency decreases, wavelength increases.

(c) Energy and frequency are directly proportional to each other. This implies that as frequency of a wave increases, its energy also increases, and as frequency decreases, energy decreases.

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Answer:

Newton's laws of motion relate an object's motion to the forces acting on it.

Explanation:

In the first law, an object will not change its motion unless a force acts on it. ... In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

The potential energy stored in the spring is 2.5J.

An ideal spring is one that has no mass and no damping. It is an example of a simple harmonic oscillator. The potential energy of a spring can be determined using the equation of potential energy. U = 1/2 kx², where k is the spring constant and x is the displacement of the spring. The formula to calculate the potential energy stored in the spring is given by the equation: U = 1/2 kx²wherek = 125 N/mx = Compression = 50 N/U = 1/2 × 125 N/m × (50 N / 125 N/m)²U = 2.5 J. Therefore, the potential energy stored in the spring is 2.5J.

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After 1 day has passed, approximately 6.25% of Element Z would be remaining.

The half-life of an element is the time it takes for half of the initial amount of the element to decay or transform into another element or isotopes. In this case, Element Z has a half-life of 5 hours.

To determine the percentage of Element Z remaining after 1 day (24 hours), we need to calculate the number of half-lives that have occurred.

Since the half-life of Element Z is 5 hours, there are 24 hours divided by 5 hours, which equals 4.8 half-lives.

Each half-life reduces the amount of Element Z by half. So, after 4.8 half-lives, the remaining amount of Element Z would be (1/2)^(4.8) = approximately 0.0625 or 6.25%.

Therefore, after 1 day has passed, approximately 6.25% of Element Z would be remaining.

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The specific heat capacity of electrons found using quantum models is less than that found using classical models because of the difference in the way electrons are modeled by the two theories.

According to classical models, electrons are treated as tiny, indivisible, and point-like particles that move around in a fixed orbit around the nucleus. This means that the electrons are considered to be in constant motion, and they are not subject to any forces that can change their energy level.

On the other hand, in quantum mechanics, electrons are treated as wave-like entities that can exist in a superposition of states. This means that electrons are subject to the laws of wave mechanics and are subject to quantization. This means that the electrons can only exist in specific energy levels, and they can only gain or lose energy in specific amounts known as quanta.

This means that the specific heat capacity of electrons found using quantum models is less than that found using classical models because the energy levels of the electrons are quantized. This means that the electrons can only absorb or release energy in specific amounts, and this restricts the number of energy states that the electrons can occupy. As a result, the amount of energy required to raise the temperature of the electrons is less than that predicted by classical models.

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Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

The electric field due to the slab at |x|>d can be found using Gauss's law. The magnitude of the electric field due to the slab at |x|>d is (σ / ε0) * πL.

The electric field due to the slab at |x|>d can be found using Gauss's law. Since the slab has a uniform charge density, the electric field at a distance r from the center of the slab is given by:

E = (1/ε0) * σ * A / (2 * r),

where σ is the charge density of the slab, A is the area of the Gaussian surface, ε0 is the permittivity of free space, and r is the distance from the center of the slab.

Since the Gaussian surface is a cylinder with radius r and length L, and |x|>d, the cylinder intersects only with the slab, so the electric field through the cylinder is constant and perpendicular to the faces of the cylinder. Thus, the area of the cylinder is A = 2πrL.

Using Gauss's law, the electric field is then:

E = (1/ε0) * σ * A / (2 * r) = (σ / ε0) * πrL / r = (σ / ε0) * πL.

Therefore, the magnitude of the electric field due to the slab at |x|>d is (σ / ε0) * πL.

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Answer:

Electrical energy

Explanation:

Hope It helps you

26.0898 rad/s is the angular velocity of a rotor in a blender.

Given

Initial velocity (ω₁) = 55.0 rad/s

Deceleration (α) = -40.7 rad/s²

Angle (θ) = 28.8 rad

Final angular velocity (ω₂) =?

According to the angular kinematic equation

ω₂² = ω₁² + 2αθ

Put the values of ω₁, α, and θ in the equation

We get,
ω₂² = (55)² + 2(₋40.7)(28.8)

ω₂² = √680.68

ω₂ = 26.0898 rad/s

Hence, 26.0898 rad/s is the angular velocity of a rotor in a blender after turning 28.8 rad.

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The surprising observational fact about quasars is that they appear to produce the energy output of 1000 galaxies in a volume similar to that of our planetary system.So option d is correct.

The surprising feature of quasars is their ability to produce the energy output of 1000 galaxies within a volume comparable to that of our planetary system.Quasars are astronomical objects that emit massive amounts of energy, making them some of the most luminous objects in the universe. Despite their compact size, they produce an energy output comparable to 1000 galaxies. This incredible energy generation occurs within a volume similar to that of our planetary system, which is much smaller than the typical size of a galaxy.Therefore option d is correct.

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The radius of the circular path is 3.7 x 10⁻⁵m.

Centripetal force is the force required by an object to follow a circular motion.

Here,

Current in the lightning strike, I = 18.5 x 10³A

Distance from the location of electrons to the middle of stroke, R = 53 m

Speed of electron in air, v = 450 m/s

The magnetic field,

B = μ₀I/2\(\pi\)R

B = (4\(\pi\) x 10⁻⁷x18.5 x 10³)/(2\(\pi\) x 53)

B = 6.9 x 10⁻⁵T

The centripetal force is provided by the magnetic force. So,

qvB = mv²/r

Therefore, the radius of the circular path,

r = mv/qB

r = (9.1 x 10⁻³¹x 450)/(1.6 x 10⁻¹⁹x 6.9 x 10⁻⁵)

r = 3.7 x 10⁻⁵m

Hence,

The radius of the circular path is 3.7 x 10⁻⁵m.

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The life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

The life expectancy of a star is determined by its mass and luminosity. The more massive and luminous the star is, the shorter its life expectancy is. Hence, using this information, we can estimate the life expectancy of the following stars:a) 0.2-solar mass, 0.01-solar luminosity red dwarfRed dwarfs are known to have the longest life expectancies among all types of stars. They can live for trillions of years.

Hence, a 0.2-solar mass, 0.01-solar luminosity red dwarf is expected to have a much longer life expectancy than the Sun. It could live for up to 10 trillion years or more.b) 3-solar mass, 30-solar luminosity starA 3-solar mass, 30-solar luminosity star is much more massive and luminous than the Sun. As a result, it will have a much shorter life expectancy than the Sun.

Based on its mass and luminosity, it is estimated to have a lifetime of around 10 million years.c) 10-solar mass, 1000-solar luminosity starA 10-solar mass, 1000-solar luminosity star is extremely massive and luminous. It will burn through its fuel much faster than the Sun, resulting in a much shorter life expectancy. Based on its mass and luminosity, it is estimated to have a lifetime of only around 10 million years as well.

Therefore, the life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

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Multiple shadow regions can be observed in the wall behind the keyhole of a door. Option B is correct.

It is a phenomenon that happens when a wave (Light) is passed through a narrow aperture or a sharp edge, the light bends at the edges.

The light bends at the edges because the sharp edges have less diameter than the wavelength of light.

Therefore, multiple shadow regions can be observed in the wall behind the keyhole of a door.

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Answer: B) It spreads out into multiple shadow regions.

Explanation:

I got it right on edge

The goose will take 8.55 hours to travel 550 km at their average speed of 64.3km/h.

The goose average speed is around 40 mph or 64.3 km/h, but in good weather and wind conditions this speed can go up to 70 mph or 112 km/h

Considering the formula:

x = v.t

were x=space, v=speed and t= time. Clearing the equation, to find the hours of flight:

t = x/v = 550km / 64.3km/h = 8.55 hours

Average speed is a useful concept in many fields, including physics, engineering, and transportation. It can be used to calculate travel times, estimate fuel consumption, and analyze the performance of machines and vehicles. However, it is important to note that average speed does not take into account changes in direction or acceleration, which can affect the overall performance of an object.

Average speed is a measure of how quickly an object moves over a certain distance. It is defined as the total distance traveled divided by the time it takes to travel that distance. The units of average speed are usually expressed as distance per unit time, such as kilometers per hour, miles per hour, or meters per second.

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Answer:

I do drink bottled water but not to often, I live about 2.8 miles away from its water source and if i did'nt drink bottled water and I had to found out how my drinking water is treated I would go ask the people that are taking care of the water.

Explanation:

hope this helps

Answer:

vaporation

Explanation:

latent heat also called the heat of vaporization is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure.

Answer:

The acceleration is 5 m/s^2

Answer:

5m/s²

Explanation:

Given parameters:

Force applied  = 15N

Mass of the student  = 3kg

Unknown:

Acceleration of the mass  = ?

Solution:

From Newton's second law of motion:

    Force  = mass x acceleration

So;

  Acceleration  = \(\frac{Force }{mass}\)  

  Acceleration  = \(\frac{15}{3}\)   = 5m/s²

Thomson's plum-pudding model of the atom differed from the previous model because it proposed that atoms consisted of a positively charged material with negatively charged electrons scattered throughout, rather than being made up of a solid, indivisible sphere.

This was based on Thomson's observation that cathode rays were made up of negatively charged particles, which he called electrons, and his conclusion that these electrons were a fundamental component of atoms. J.J. Thomson's plum-pudding model proposed that the atom was made up of negatively charged electrons embedded in a positively charged sphere, which was different from the previous model of the atom as a solid, indivisible sphere with no internal structure.

The conclusions was based on his experiments with cathode ray tubes, where he observed that the rays were deflected by electric and magnetic fields, indicating the presence of negatively charged particles (electrons) within the atom. This evidence led him to propose the plum-pudding model to account for these negatively charged particles in the atomic structure.

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Answer:

\(\omega_2=0.891\ rev/s\)

Explanation:

Given that

Radius , r= 3.03 m

Mass of disk , M= 145 kg

Initial angular velocity

ω=0.681 rev/s

Mass of person , m= 65.4 kg

Velocity of person , V= 3.41 m/s

Initial mass moment of inertia

\(I_1= \dfrac{M\times R^2}{2}\)

\(I_1= \dfrac{145\times 3.03^2}{2}=665.61\ kg.m^2\)

Final mass moment of inertia

\(I_2= \dfrac{M\times R^2}{2}+m\times R^2\)

\(I_2= \dfrac{145\times 3.03^2}{2}+65.4\times 3.03^2=1266.04\ kg.m^2\)

\(Final\ angular\ velocity =\omega_2\)

By using angular momentum equation

\(I_1\times \omega+m\times V\times R=I_2\times \omega_2\)

\(665.61\times 0.681+65.4\times 3.41\times 3.03=1266.04\times \omega_2\)

\(1129.01= 1266.04\times \omega_2\)

\(\omega_2=\dfrac{1129.01}{1266.04}\)

\(\omega_2=0.891\ rev/s\)

Thus the angular velocity will be 0.891 rev/s

Explanation:

Earth’s orbit around the Sun represented as :

1 AU = 4 inches

Therefore,

Inner edge of the Oort Cloud represented as :

10,000 AU = 40,000 / 63360 = 0.631 miles

Outer edge of the Oort Cloud represented as:

100,000 AU = 400,000 / 63360 = 6.31 miles

The dog will not catch the car, as the car is traveling at a faster speed than the dog. The dog may continue to chase after the car, but it will not be able to catch it.

To determine if the dog catches the car, we need to compare their relative speeds. The car is traveling at a constant speed of 5 m/s, while the dog's speed is unknown. We can calculate the dog's speed using the distance it covers in 5 seconds, which is 20 meters.

To calculate the dog's speed, we divide the distance traveled by the time taken:

Speed = Distance / Time

Speed = 20 meters / 5 seconds

Speed = 4 m/s

Now we know that the dog's speed is 4 m/s, which is less than the car's speed of 5 m/s. Therefore, the dog will not be able to catch the car. The dog will keep running after the car but will never catch up to it because the car is traveling faster.

It's worth noting that even if the dog's speed was equal to the car's speed, the dog would still not be able to catch the car. This is because the car is moving away from the dog and the distance between them is constantly increasing.

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