A charming friend of yours who has been reading a little bit about astronomy accompanies you to the campus observatory and asks to see the kind of star that our sun will ultimately become, long, long after it has turned into a white dwarf. Why is the astronomer on duty going to have a bit of a problem satisfying her request?.

By converting the 400 nm wavelength of violet light into meters we are get 4.0.10^-7.

What is wavelength ?

wavelength can be defined as the distance between two successive crests or throughs of a wave. It is measured in the direction of the wave.

The wavelength of light defined as the distance between the two successive crests or throughs of the light wave.

The wavelength of light is the distance between corresponding point in two adjacent light cycles and the frequency.

Convert the unit for 400nm-

4.0.10^-7

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160000 kgm/s is the impulse of the car. ​

J=mΔv

I= impulse

m= mass= 2000kg

Δv=  change in velocity= 80 km

J=mΔv

I= 2000kg×80 km/s

I=160000 kgm/s

The concept of impulse is used to describe how a net force affects an item (a kind of "moving force"). Impulse is denoted by the letter J.  The average net force acting on an item over time is calculated as an impulse. The force-time integral is J = Ft. The vector quantity of impulse is J = F dt (since force is a vector and time is a scalar).

Theorem of Impulse-Momentum According to the impulse-momentum theorem, an object's change in momentum equals the impulse that was delivered to it. J = ∆p The newton second is the SI unit for impulse. The kilogram meter per second is the SI unit for momentum. These momentum and impulse units are the same.

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Many scientists suspect that Venus has a stronger and thicker lithosphere than Earth. Option A. The high surface temperature "baked out" all the liquid water from Venus's crust and mantle which could explain this.

The crust of Venus appears to be almost entirely volcanic and basaltic. there is not anything there like Earth's continents—no granitic rocks in any respect, high in silicon and oxygen.

Venus's crust appears to be 70 kilometers (43 mi) thick and composed of silicate rocks. Venus's mantle is approximately 2,840 kilometers (1,760 mi) thick, its chemical composition might be similar to that of chondrites. Venus' floor isn't an unmarried, solid “lithosphere”, as as soon thought, however, it is a patchwork of tectonic plates with a similar pastime to – but not the same as – the ones here on this planet

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A horizontal dart launch with just an initial velocity of 2. 3 m/s accelerates upwards at a rate of -9.8 m/s2.

acceleration is the rate of change in both speed and distance of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated.

An object has positive acceleration when it is going faster than it was previously. Positive acceleration was demonstrated by the moving car in the first scenario. The acceleration is in a direction that is consistent with the way that the vehicle is moving forward and speeding up.

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George's weight on the moon is  104 N.

A gravitational field is a version used to give an explanation for the influence that a huge body extends into the gap around itself, producing a force on another huge frame. thus, a gravitational subject is used to provide an explanation for gravitational phenomena and is measured in newtons in step with kilogram.

That is a manner of measuring how a good deal of gravity there is. The method is weight/mass = gravitational discipline strength. on earth, the gravitational area energy is 10 N/kg.

Calculation:-

Given,

George's mass = 65kg

Gravitational field strength on the moon = 1. 6  N/kg

Then, the weight of George on the Moon = Mass x Gravitational field strength

                                                              = 65  x  1.6

                                                              = 104 N

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Initial velocity = 0 m/s

Displacement = 5 m

Acceleration = 10cos25° = 9.06 m/s^2

time = ? (To be calculated)

Using, S = ut + at^2/2, we have

5 = 0(t)+9.06t^2/2

10/9.06 = t^2

t = 1.006 seconds

When Velma’s rocket is moving with 0.75c speed and observing the tip of the laser beam to move away from him at speed c, then Velma should observe this laser beam to move past her at a speed of 0.25C.

A rocket is a vehicle that accelerates without using the air around it by using jet propulsion. A rocket engine's reaction to high-speed exhaust is what gives it power. A rocket can fly in the vacuum of space because its engines are totally powered by fuel carried inside the craft.

A laser is a device that produces light using an optical amplification technique based on the electromagnetic radiation's stimulated emission.

According to the predictions of Einstein's relativity  time dilates in a gravitational field which results in the above outcome.

Hence, when Velma’s rocket is moving with 0.75c speed and observing the tip of the laser beam to move away from him at speed c, then Velma should observe this laser beam to move past her at a speed of 0.25C

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Among the incorrect assertions are B. Sound waves can travel by themselves. C. Energy of all kinds can move without a medium. D. Mechanical energy is not dependent on a medium to move (B,C and D).

Energy is transferred via the vibrations of the electric and magnetic fields in electromagnetic waves. When a sound wave travels through air or a solid medium, air or solid particle vibrations are used to transfer energy. The vibration of the water molecules in water waves transfers energy.

A medium is necessary for mechanical waves to transfer their energy from one place to another. An illustration of a mechanical wave is sound.

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The acceleration due to gravity is 9.8 m/s^2.

What is gravity?
In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all matter together. It has no impact on determining the internal characteristics of common matter because it is by far the weakest known force in nature. In contrast, it governs the structures as well as evolution of stars, galaxies, as well as the entire cosmos through its extensive and universal action, which affects the trajectories of objects in the solar system and throughout the universe. All objects on Earth have a weight, or a gravitational pull downward, proportional to their mass, which is a result of the mass of the planet. The acceleration that gravity gives to objects falling freely serves as a gauge of its strength. The acceleration of gravity at Earth's surface is approximately 9.8 metres (32 feet) per second for every second.

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The acceleration of the skater is 3.2 m/s^2 while the distance covered is 40 m

The term friction has to do with the force that opposes motion. We know that the net force would be the difference between the thrust force and the frictional force since they act in opposite directions.

Now;

ma = 100 N - 20 N

The m is the mass of the object and the a is the acceleration of the skater.

25a = 100 N - 20 N

a = 100 N - 20 N/25

a = 3.2 m/s^2

Now;

s = ut + 1/2at^2

If u = 0 m/s (started from rest)

s = 1/2at^2

s = 0.5 * 3.2 * (5)^2

s = 40 m

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The shadow is decreasing at the rate 0.9375 m/s if wall 12m away and man 2m and speed 2.5 m/s and shadow is 4m.

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= dx/dt=2.5m/s

ΔABD=ΔECD

therefore, AB/EC=BD/CD

y/2=12/x

xy=24

differentiate w.r.t t

xdx/dt+ydx/dt=0

xdy/dt=-ydx/dt

dy/dt = - y/x dx/dt

dy/dt=-3/8*2.5=-0.9375 m/s

length of shadow is decreasing at the rate of 0.9375 m /s

Therefore,

Speed is a term used to describe an object's magnitude of velocity. Kinematics typically examines speed. Dispatching, expedition, haste, and hurry are some frequent synonyms for speed. In spite of the fact that all of these words refer to "quickness in movement or action," the word "speed" suggests quick efficiency in movement or action. Additionally, some people use various forms of speed to suppress their appetite. Velocity, as opposed to speed, refers to the rate and direction of an object's movement as it moves along a path. Speed is defined as the rate at which a distance changes over time with a Velocity. It has a distance by time dimension. The basic unit of distance plus the basic unit of time are combined to form the SI unit of speed. The metric system uses meters per second as the unit of speed.

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The answer is ball swings towards passenger side. correct option is (B).

Bernoulli's equation = P+1/2ρv^2+ ρgh=Constant,

so

P1+1/2ρv1^2+ ρgh1= P2+1/2ρv2^2+ ρgh2

(v1^2-v2^2)=g(h2-h1)

So from the formula we can see that the change in velocity depends on the height difference, and the wind blows the ping pong ball will move which will make a height difference and hence the ball will swing.

What is Bernoulli's equation-

According to the Bernoulli's principle of fluid dynamics, a fluid's speed increases at the same time as its static pressure or potential energy decreases.

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Using the buildup of electric charges on two neighbouring surfaces that are electrically insulated from one another, a capacitor is a device that stores electrical energy in an electric field. It is an electrical passive component with two terminals. Capacitance is the measurement of a capacitor's effect.

C = ∈oA / d = (8.85 * 10⁻¹² * 0.0178) / (0.35 * 10⁻³)

                  = 4.5 * 10⁻¹⁰ F

Q = C*V = (4.5 * 10⁻¹⁰ * 27)

            = 1.215 * 10⁻⁸ C

E = V / d = 27 / (0.35 * 10⁻³)

              = 7.71 * 10⁴ N/C

An electrical energy storage device called a capacitor is made up of two conductors that are situated close to and insulated from one another. A parallel-plate capacitor serves as an easy-to-understand illustration of one such storage device.

In contrast to a battery, a capacitor is a part of a circuit that uses a potential difference created by charged particles distributed between (typically two) plates to temporarily store electrical energy. A capacitor may charge more quickly than a battery and can quickly release all of its stored energy.

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The magnetic area is parallel to the direction of the contemporary within the twine. electric costs produce electric-powered fields and magnets produce magnetic fields.

A magnetic discipline is a vector discipline that describes the magnetic impact on moving electric expenses, electric-powered currents, and magnetic materials. A moving fee in a magnetic subject reviews a force perpendicular to its own velocity and to the magnetic field.

The magnetic area is the area round a magnet that has magnetic pressure. All magnets have north and south poles. contrary poles are attracted to every different, even as the identical poles repel each different. when you rub a bit of iron along a magnet, the north-looking for poles of the atoms inside the iron line up in the equal path.

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Disclaimer:- your question is incomplete, please see below for the complete question.

Each of the four drawings shows the same three concentric loops of wire. the currents in the loops have the same magnitude i and have the directions shown. rank the magnitude of the net magnetic field produced at the center of each of the four drawings, largest to smallest.

The transformer is step-up because output voltage has higher value.

We need to know about the transformer to solve this problem. Transformer is a device that can increase or reduce the voltage. The changed voltage depends on the current and number of coil turns. It can be written as

Vi / Vs = Ni / Ns = Is / Ii

where Vi is input voltage, Vs is output voltage, Ni is primary turn, Ns is secondary turn, Is i output current and Ii is input current.

From the question above, we know that

P = 78 W

Vs = 14 V

Ii = 34 A

Find the input voltage by using the power of transformer

P = Ii . Vi

78 = 34 . Vi

Vi = 2.29 V

As we know the input voltage is lower than the output voltage. It means that the transformer is included to step up transformer.

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The relative ability of a bonded atom to attract shared electron pairs is called its electronegativity. This ability increases as the size of the atom decreases because for a smaller atom the shared electrons will be closer to the nucleus.

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei.

Electronegativity is defined as the ability of an atom in a molecule to attract electrons to itself. The concept of an electronegativity scale for the elements was proposed by Pauling.

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Skateboarders move more quickly and more slowly depending on the gravitational field around them.

Skateboarders go more slowly and more quickly depending on the amount of friction they encounter. The skater initially has no kinetic energy, only potential energy. The skater had used all of the energy that she will ever have. Since the track is frictionless, no energy is converted to thermal energy throughout the route from point A to point B. The skater has greater potential energy the higher he is. His kinetic energy increases and his potential energy falls as his height decreases. Ice skating is a good illustration of sliding friction.

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50 metres away from the observer, a balloon begins to rise at a rate of 4 metres per second. When the balloon is 50 metres above the ground, determining how quickly the angle of elevation between the observer and the balloon changes.

Let h be the height of the balloon above the ground and represent the angle of elevation.

tanθ= h/50
provided that a balloon's height is 50 metres
tanθ =50/50
tanθ=1
θ=45o
tanθ= h/50
differentiating in light of time t
(1/50)dh/dt sec2 d/dt
Given that the balloon rises at a rate of 4 metres per second, we obtain 45o, therefore dh/dt = 4 m/s.
sec245o d=1/50*4 dt
2*dθ/dt= (1/50)*4
dθ/dt= (1/50)*4/2
dθ/dt= 1/25
0.04 rad/sec for d/dt.

When the balloon is 50 metres above the ground, the angle of elevation of the balloon is changing at a rate of 0.04 rad/sec from the observer.

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The energy that occur during the process of photosynthesis that changes to convert light energy into chemical energy stored in carbohydrates.

Photosynthesis occurs in plants that have chlorophyll and converts the solar energy absorbed into the chemical fuel required for energy generation.

Photosynthesis is primarily responsible for producing and sustaining the oxygen content of the Earth's atmosphere, as well as providing the majority of the energy required for life on Earth.

Plant leaves absorb sunlight and convert it into glucose and oxygen with the help of water and carbon dioxide.

Carbohydrates are broken down and undergo chemical changes in the presence of sun radiation, resulting in sustenance.

As a result, light energy is converted into chemical power during photosynthesis.

The plants convert the sunlight into glucose and oxygen with the help of water and carbon dioxide.

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The carbon atoms in this image are shown as white circles. It has 55 carbon atoms coupled to 72 hydrogen atoms, 5 oxygen atoms, 1 magnesium atom, and differently substituted porphyrin rings with magnesium.

The phytol chain, a long carbon-hydrogen side chain, connects the ring to the porphyrin ring, a nitrogen-containing structure that surrounds the central magnesium atom in the chlorophyll molecule. Chlorophyll is the primary pigment used by plants to absorb light energy. A chlorophyll molecule has a porphyrin head and a long hydrocarbon tail.

Chlorophyll comes in four different varieties: chlorophyll a, which is present in all higher plants, algae, and cyanobacteria; chlorophyll b, which is present in higher plants and green algae; chlorophyll c, which is present in diatoms, dinoflagellates, and brown algae; and chlorophyll d, which is only present in red algae.

Thus, we might conclude that the white circles in this figure represent the carbon atoms.

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Answer:

An electric battery provides a current.. answer is continuous

No resistors are connected in series.

A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance.

A resistor is an electrical component that controls or restricts how much electrical current can pass across a circuit in an electronic device. Additionally, resistors can be used to supply a particular voltage to an active device like a transistor.

A passive electrical component called a resistor prevents the flow of electric current by introducing resistance. They are present in practically all electrical networks and electronic circuits. Ohms are used to measuring resistance.

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Net force on the image is 0 Newton.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Net upward force is balanced by net downward force so net force is zero.

Net force on the image is 0 Newton.

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Answer:Since heat flows from the cold water to the hot pot, the total energy of the cold water will decrease

Explanation:

Answer:Since heat flows from the hot pot to the cold water, the total energy of the cold water will increase. 

Explanation:

We don't notice the earth acceleration upwarde because of its massive size, the earth is at rest

State Newton's third law of motion?

The stone also pulls on the Earth in an equal measure, but the acceleration caused by that force on the Earth is minimal. Given that the mass of the Earth is 6.4 × 10^24 kg, the accelerations brought about by the stone's force acting on the Earth will be of the order of 10^–24, or essentially nothing.

Hence, because of its massive size, the earth is at rest.

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Answer:

BELOW

Explanation:

Basically it adds AIR FRICTION.

A steel cable supports an actor as he swings onto the stage, the weight of the actor stretches the steel cable, to describe the relationship between stress and strain for the steel cable, you would use Young's modulus. Correct answer: letter B.

Young's modulus is used in this statement because it is a measure of the stiffness of a material. The steel cable is stretched by the actor's weight, and the amount of stretch is related to the tension in the cable and the Young's modulus of the steel.

Is a measure of the stiffness of a material. It is defined as the ratio of the stress to the strain, and it is a measure of the ability of a material to resist deformation under load.

Therefore, when an actor's weight stretches a steel cable, the cable experiences tension. The amount of stress experienced by the steel cable is directly proportional to the amount of strain experienced by the steel cable. This relationship is described by Young's modulus.

A steel cable supports an actor as he swings onto the stage. The weight of the actor stretches the steel cable. To describe the relationship between stress and strain for the steel cable, you would use?

Group of answer choices:

a) both shear modulus and bulk modulus.

b) Young's modulus

c) bulk modulus.

d) shear modulus

e) both Young's modulus and bulk modulus.

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Answer:

When the system reaches equilibrium, the total kinetic energy of the molecules will be zero.