which is the correct answer

Compared with the orbits of the short period comets, the orbits of long period comets can come from all directions.

Short period comets come from the kuiper belt. Comets of long period come from the ort cloud which is a cloud debris surrounding the sun at a distance of 1 light year.

Long period comets have orbital period more than 200 years. Their orbits are inclined in the ecliptic plane. They may be perturbed by a passing star. Their orbits are highly inclined because of spherical origin.

They can be seen in night sky with much brilliance. Their brilliance is because thy have not passed from inner solar system.

Short period comets have orbital period less than 200 years. Haily type comets are example of short period comets.

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a)Work performed by 2.4 N force: W = 3.6 J

b)work performed by o.6 N frictional force: W = -0.9 J

c) The normal force's work on the book, W = 0 J

d) Gravitational work on the book, W = 0 J

e) Work completed, W = 2.7 J

A force is an influence that has the power to alter an object's motion. A mass-containing object's velocity can be altered by a force. An obvious way to define force is as a push or a pull. Two surfaces that come into contact and glide against one another produce frictional force. The part of a contact force that is perpendicular to the surface that an item encounters is known as the normal force.Gravity, which means "weight" in Latin, is a basic force that attracts all objects with mass or energy to one another.The explanation is shown in the accompanying picture.

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Time taken by plane  reach a speed  of 33 m/s from rest is  4.125 second.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Force generated by the jet engine: F = 160 kN = 160000 N.

Mass of the Plane: M = 20000 kg.

Acceleration of the plane = force/mass

= 160000 / 20000 m/s²

= 8 m/s².

Hence, Time taken by plane  reach a speed  of 33 m/s from rest =

change in speed/acceleration

= (33 -0)/8 second

= 4.125 second.

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The relationship between wavelength, energy, and frequency is expressed by the formula E = hv = hc/, where E is energy, h is Planck's constant, v is frequency, c is the speed of light, and w is wavelength.

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A certain genetic ailment might be more prevalent in the group if one of these common genes contains a disease-causing variant (also known as a mutation).

A genetically based ailment will affect roughly 6 out of every 10 individuals. From minor to extremely severe genetic disorders are possible. It is believed that a delicate balance between mutation, genetic drift, and natural selection is the main reason why diseases continue to affect human populations.

How many copies of that gene variant (or allele) are present in the population determines how frequent a trait is. Whether a trait is dominant or recessive has little to no bearing on this.

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The safety procedures to follow when refueling includes emptying the vehicle and turning of the engine.

Some certain safety procedures has to be followed while refueling the vehicle.

1. We have to make sure that we turn off the engine while refueling because keeping the engine on while refueling can give price to an unexpected explosion.

2. There are certain vehicles that have the gas cylinders in them as a fuel tank, in these cases we have to make sure that there is no one sitting inside the car while refueling. Doing this is not an economical thing and also it can give rise to certain unexpected accidents.

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The work done by the motor is 196×10⁴Joules, if a motorized cable moves a 2000kg elevator upwards for 10m.

We know that from The work-energy hypothesis, otherwise called the rule of work and dynamic energy, expresses that the all out work done by the amount of the multitude of powers following up on a molecule is equivalent to the adjustment of the motor energy of that molecule. This clarification can be reached out to inflexible bodies by portraying crafted by rotational motor energy and force

In order words, W=F.dx

where F is the force applied on the body, dx is the displacement of the body.

Now, for calculating force we know that gravity is acting on it

So, force applied on the body is =mg where m is the mass and g is acceleration due to gravity.

We have m=2000kg and g=9.8m/sec²

So, value of mg=2000×9.8=19600.0=19600N

Now, we have displacement(dx)=10m

So, work done=196000 × 10=1960000Joules or 196×10⁴Joules.

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Answer:

m= 5.60kg

Explanation:

∑F = m*a

m = ∑F/a; a = Δv/Δt

m = ΣF/(Δv/Δt)

m = (62N)/((5.2m/s)/(0.47s))

m = 5.60kg

The tension in the string increases if the ping-pong ball is replaced by a smaller spherical object of equal weight.

When two opposing forces pull on a rope, string, wire, the force transmitted through the object is known as tension. The energy is pulled equally on the bodies at the ends by the tension force, which is applied along the entire length of the wire. Each physical object that comes into contact with another applies force to that object.

Weight is the gravitational pull of the large second object, like the moon or the earth on a first object.

The concepts required to solve the given question is the tension in the string.

Let us write an expression for tension in terms of volume, density of the liquid, density of the solid. Then, compare the tension on the basis of density of matter. Finally, compare the tension on the basis of the weight of the spherical ball.

The expression for the tension in terms of volume, density of liquid and density of solid is as follows,

T = V * (Pl - Ps)

where, V is the volume

Pl  is the density of liquid

Ps is the density of solid

The tension in the above equation is directly proportional to volume, density of liquid, density of solid. As the density of liquid increases, the tension increases. Thus, the tension in the string neither decreases nor remains same.

After adding salt to the liquid, the density of the liquid increases.

The tension will decrease as the volume displaced will decrease.

The weight of the spherical balls is same but the volume is decreased.

The density of the solid remains constant but the density of liquid decreases. Therefore, net tension in the string neither increases nor remains same.

Therefore, tension in the string increases in the string if ping-pong ball is replaced by a smaller object of equal weight.

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Scientists utilize the EM300 device to produce exact maps of the a seafloor.The EM300 can operate in water as shallow as 10 meters and as deep as 5000 meters.

Dive and Discover:Sonar is used in oceanographic research.Today, echo sounding is the primary method used by scientists for map the seafloor.

Today, sonar aids in the creation of bottom maps, buoys and water depth samplers are used to track the effects of sea level changes on water quality parameters, coring devices collect samples of sediment, and remotely operated vehicles (ROVs) enable everybody to effectively and safely discover any oceanic region.

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The number of star or object that matches each description are Giant stars, Redshifted and blueshifted spectral lines, Binary stars, Cepheid variable stars, and Nebulae and emission spectra.

Based on this information, you can classify the stars in the table as follows:

Star 5: Binary star (indicated by the presence of two spectra shifting in opposite directions)

Star 6: Cepheid variable star (indicated by the intensity of some spectral lines decreasing in a regular cycle)

Star 7: Giant star (indicated by narrow spectral lines due to low atmospheric pressures)

Star 8: Nebula (indicated by the presence of an emission spectrum with bright lines of color against a dark background)

Star 9: Star with redshifted spectral lines (indicated by the shift toward the red end of the spectrum)

Star 10: Star with blueshifted spectral lines (indicated by the shift toward the blue end of the spectrum)

Unusual features in these spectra could include the presence of two spectra shifting in opposite directions (indicating a binary star), the intensity of some spectral lines decreasing in a regular cycle (indicating a Cepheid variable star), or the presence of an emission spectrum with bright lines of color against a dark background (indicating a nebula).

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The formula V = π r² h is used to find the volume of a cylinder.

The volume of a cylinder refers to the density of the cylinder which indicates the amount of material it can hold or how much amount of any material can be immersed in it. To calculate a cylinder's volume, the formula to be used is v = π r² h. In this formula:

Hence, the required formula for the volume of a cylinder is V = π r² h.

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While loading the passengers on to the boat we should make sure that we position them write above the centre of mass of the boat.

The center of mass is a point in or outside anybody where we consider that the whole mass of the body is concentrated. We know that when are boat is hovering over a fluid it will experience some upward force which is equal to the mass of the fluid displaced by the boat.

When we position the passengers write about the centre of mass of the boat, we reduces the chance of disbalance of the boat by a very significant level.

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The wire segment was parallel to the y-axis E = 0.72 volt ;E = 0 volt are the answer.

Segmentation is the process of dividing a large target market into smaller, more distinct groups of people who share similar characteristics. Segmentation is a key practice of modern marketing, as it allows businesses to identify and target their most valuable customer groups more effectively. By segmenting customers, marketers can better tailor their campaigns to their specific customer base and maximize their marketing investment. Segmentation also helps organizations identify and target the right audiences with the right message.

Given that – Length of segment = 0.50m

1.  E = L * (V x R)

E = 0.50k {(18i + 24j +72k) x (0.800j)}

E = 0.50 * 18 * 0.800 + 0

E = 0.72 volt

Thus, the motional emf will be 0.72 volt

2.  If the wire segment is parallel to y-axis

E = 0.50j * {(18 x 0.080) k – (72 x 0.800) i)}

E = 0 volt

Thus, the motional emf in this situation is zero.

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Answer:

Approximately [tex]4.25\; {\rm N}[/tex] as long as the wooden block continues moving.

Explanation:

Since the wooden block is moving, the friction on the block will be kinetic friction. This friction will be proportional to the magnitude of the normal force on the block. Specifically:

[tex]\begin{aligned}& (\text{kinetic friction}) \\ =\; & (\text{normal force})\, (\text{kinetic friction coefficient $\mu_{k}$}) \end{aligned}[/tex].

In this question, since the surface is horizontal, the only vertical forces on this block will be:

These two forces will balance each other. Thus, [tex](\text{normal force}) = (\text{weight})[/tex].

[tex]\begin{aligned}(\text{normal force}) &= (\text{weight}) \\ &= (\text{mass})\, g\end{aligned}[/tex].

Substitute to obtain:

[tex]\begin{aligned}& (\text{kinetic friction}) \\ =\; & (\text{normal force})\, (\text{kinetic friction coefficient $\mu_{k}$}) \\ =\; & (\text{mass})\, (\text{kinetic friction coefficient $\mu_{k}$})\, g\end{aligned}[/tex].

In other words, the kinetic friction on the block is proportional to the mass. As long as the block continues moving, increasing mass from [tex]1200\; {\rm g}[/tex] to [tex](1200 + 500)\; {\rm g} = 1700\; {\rm g}[/tex] will increase friction to [tex](1700 / 1200) = (17/12)[/tex] the initial value, [tex](17/12)\, (3\; {\rm N}) \approx 4.25\; {\rm N}[/tex].

A radioactive isotope's half-life is the length of time it takes for one half of it to decay.

The duration needed for a quantity of a radioisotope to decay by half is known as its radioactive half-life. If an isotope has a half-life of only a few hours or less, the majority of the radioactivity will dissipate within a few days.

A radioactive element's half-life is the amount of time it takes for it to decay to half of its original value. It can be concluded from this that a source's activity has a half-life if it takes some time before it drops to half its starting value.

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Jump, endless, detachable, endpoint, and mixed discontinuities can all be categorised. The existence of the limit is a characteristic of removable discontinuities.

Redefining the function is one way to "repair" removable discontinuities. Endpoint Discontinuities: There is only one one-sided limit. Mixed: None of the one-sided constraints exist, at least in part. Below is a graph of f (x), which demonstrates a function that discontinues when x = a. Mixed: None of the one-sided constraints exist, at least in part. Both one-sided limits are present in 1 Jump Discontinuities, although they have distinct values. Both one-sided limits are infinite, resulting in two infinite discontinuities. Three endpoint discontinuities: There is only one one-sided limit. 4 Mixed: None of the one-sided constraints exist, at least in part.

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The act of waves spreading out after passing through a tight opening happens when they cross the edge of a surface, as they are twisted around an object, and as they pass through the aperture's narrow opening. phenomenon where the amplitudes of two or more waves combine.

When a wave runs into a minor obstruction or an opening, it may bend to get around it or pass through it before spreading out. The term "diffraction" refers to this bending or spreading out.

A wave that runs into a minor obstruction will typically bend around it. Diffraction is the name given to this wavefront bending.

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The best way to know what the safe load is for the boat is to calculate the buoyancy of the boat.

According to the Archimedes' principle, when a body is some merged in a liquid partially or fully, an upward force is applied on the body by the fluid that is equal to the weight of the fluid displaced by the body.

This upward force is called buoyancy.

As long as the weight of the lord on the boat is equal to the buoyancy of the boat it can we considered a safe load limit for the boat.

The buoyancy of the boat can be calculated by using the volume of the boat the density of the liquid in which the boat is going to serve and the acceleration due to gravity.

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(a) The average power of the elevator motor during this period will be 6431.25 W

(b) Power delivered by the motor during Constant speed motion. is greater than power delivered during moving at a Constant acceleration

Mass of elevator. m=700 kg

Initial velocity.u =0 m/ s

Final velocity v=1.75 m/ s

time [tex]\Delta t[/tex] =2.5 sec

(a) Average power of elevator motor the this during Period [tex]P{avg =\frac{w}{\Delta t}[/tex]

We know [tex]W=F\cdot d \cos \theta[/tex]

[tex]W_{motor }=F_{motor } d \cos 0^{\circ}[/tex]

W_{motor}=F_{motor } d

Net force = F_{net}=F_{motor}mg

As per Newton's Second Law ma =F_ {motor }-mg

Now applying the equation of motion: v=u+at

1.75=0+a*2.5 =>a=0.7 m/s^2

[tex]F_ {motor}=Ma+g=700(0.7+9.8) \\\Rightarrow F_ {motor}=7350 ~N\\d=ut+\frac{1}{2} \times a \times t}^2\\\Rightarrow d=0 t+\frac{1}{2} \times 0.7(2.5)^2\\d}=2.1875 m[/tex]

[tex]W_{motor}=F_{motor} \times d=7350 \times 2.1875=16078.125 J\\P_ {avg }=\frac{W_{motor }}\Delta t}=\frac{16078.125}{2.5}=6431.25 W[/tex]

B) if the elevator is Constant with moving up speed

F_{net}=F_{motor }-mg

But a =0

So, F_motor=mg = 700*9.8=6860 N

So, the value of the distance moved will be:

[tex]\triangle \mathrm{x}=\mathrm{vt}=1.75 \times 2.5=4.375 \mathrm{~m}\\\\\mathrm{~W}_{\text {motor }}=\mathrm{F}_{\text {motor }} \Delta \mathrm{x}=7350 \times 4.375=32156.25 \mathrm{~J}\\\\\mathrm{P}_{\text {avg }}=\frac{32156.25}{2.5}=12865.5\mathrm{w}\\\\[/tex]

[tex]\frac{\left(\mathrm{p}_{\text {avg }}\right) \mathrm{a}}{\left(\mathrm{p}a_{\text {avg }}\right) \mathrm{b}}=\frac{6431.25}{12865.5},\left(\mathrm{p}_{\text {avg }}\right) \mathrm{a}=0.499 \times\left(\mathrm{p}_{\mathrm{avg}}\right) \mathrm{b}[/tex]

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It serves as a shorthand for the collection of all natural numbers. Positive, non-zero whole numbers make up the natural numbers.

Natural Numbers (N) are the whole numbers 1, 2, 3, 4, and so on. They are also known as positive integers, counting numbers, or natural numbers (W). The collection of natural numbers is indicated. The letter n is used to begin the word number. This is why the n symbol is used in mathematics.

The parameter n is referred to as the "index of summation." As you go from the first number to the last, replace the index of summation with consecutive integers to create the terms of a series expressed in sigma notation.

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According to newton's third law, what is the equal and opposite force to the downward force of gravity pulling on a man standing on the beach?

[tex]\fbox{The man pulling upward on earth}[/tex]

These sources can be found primarily in three different contexts: industrial processes, natural gas processing, and fuel combustion activities.

CO2, or carbon dioxideThe main source of CO2 is the burning of fossil fuels.Indirect human-induced effects on forestry as well as other land uses, such as deforestation, clearing land for agriculture, and soil deterioration, can indirectly release CO2.

There are two main sources of atmospheric carbon dioxide: natural processes and human activity.The majority of animals, who exhale in the form of a waste product, are natural sources of dioxide.

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The net force on 20 kilogram ball rolling down the ramp is 240 N.

Newton's law relates the acceleration of the ball and mass of ball. The relationship or formula between the two is as follows -

F = ma, where F is force, m is mass of ball and a is the acceleration of ball. Keep the values in formula to find the net force acting on the ball.

Force acting on the ball = 20 × 12

Performing multiplication on Right Hand Side of the equation

Force acting on the ball = 240 N

Thus, the force ont the ball is 240 N.

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At the top of a roller coaster there is a cabin whose mass is 100 kg at a height of 40 m and with a speed of 5 m/s, its mechanical energy becomes: 40450 J

Mechanical energy, also known as kinetic energy or potential energy, is the energy that an item possesses when it is in motion or the energy that an object stores due to its location. Renewable energy is also fueled by mechanical energy.

In order to efficiently create electricity or convert energy, many sources of renewable energy depend on mechanical energy.

A compressed spring, for instance, has mechanical energy in the form of potential energy, whereas a moving vehicle has mechanical energy in the form of kinetic energy.

Given that,

mass (m) = 100 kg

speed (v) = 5 m/s

height (h) = 40 m

Total mechanical energy of the roller coaster at point A

= Potential energy at point A + Kinetic energy at point A

= mgh + (1/2)mv²

= (100×9.8×40)+ [0.5×100×(5)²]

= 39200 + 1250

= 40450 J (Answer)

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The transmission will be seen as an electromagnetic wave. Radio antennas, like flashlights, emit lower energy photons that our eyes cannot see.

A cyclically alternating voltage causes electrons in the antenna's cables to jiggle back and forth. By the way, radio frequency photons have significantly less energy than visual photons. Yes, radio antennas can emit visible light, but most likely not in the way you expect. Through the process of thermal radiation, you can heat up a radio antenna until it glows and emits visible light if you apply enough energy to it.  Radio antennas, like flashlights, emit lower energy photons that our eyes cannot see.

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During the height of the development of that form, realism's emphasis on objectivity, detachment, and accurate observation, as well as its clear but restrained criticism of social norms and environments, and the humane understanding that underlay its moral judgments, all played a significant role in the development of the modern novel.

Realistic thinking centered on portraying everyday reality in its truest form. Realistic thinking is concerned with the present moment, with actual events and their verifiable results. Realism aims for a one-to-one correspondence between the topic and the depiction. It also goes by the name mimesis.

Three schools of realist thought exist: human nature realism, state-centric realism, and system-centric realism.

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The resistance R divided by the potential difference V yields the current I. We simply need to determine the potential difference and resistance of the circuit in order to determine the current in this ammeter, which measures the current of the circuit.

The ammeter is linked to the circuit in series. Therefore, its reading will reflect the amount of current flowing through the circuit. Consequently, the ammeter's reading is 1A.

We can easily calculate current by dividing the total charge by the measurement period. I = Q t, where I stands for current, Q for charge, and t for time, is a formula for calculating current.

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The most common example of inverse variation is distance and speed. As the speed increases the distance decreases.

Unemployment and inflation have a well-known inverse relationship. When the value of one parameter rises while the value of the other decreases, the parameters, such as time and distance, are inversely connected. When x is not equal to zero and k is a nonzero real number constant, the nonlinear function known as inverse variation is described by the equation x y = k. If there is a nonzero constant k such that y = k x, then the variable y fluctuates directly as x. A link between two variables that can be mathematically described by an equation in which the product of the two variables equals a constant. The inverse of a trigonometric function, the inverse of a rational function, the inverse of a hyperbolic function, and the inverse of a spherical function.

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Answer:

What are your answer choices?

Explanation:

Work is like if you are a police officer you take down enemies. Force is like if you use a negatively charged balloon next to an uncharged piece of paper, they balloon would attract each other.

Hope this helps :D