What is the source of heat for convection currents in the mantle layer of earth

The question is incomplete I answered in general way .

Green's theorem in vector calculus connects a line integral centered on a straightforward closed curve C to a double integral over the plane region D enclosed by C. It is Stokes' theorem's two-dimensional particular instance.

Green's theorem has numerous uses. One involves solving two-dimensional flow integrals, which states that the total amount of fluid emitted from a volume is equal to the sum of the outputs from all surrounding areas. Green's theorem can be applied to plane geometry, and in particular, area surveying, to find the area and centroid of plane figures by simply integrating over the perimeter.

One of calculus's four fundamental theorems, all of which are closely related to one another, is green's theorem.

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The capacitor is the energy storage device in the form of electrical energy and the capacitance is the ratio of charge and potential difference between capacitors.

The capacitance in the parallel plate capacitor is directly proportional to the area of the conductor and inversely proportional to the distance between the capacitors. The unit of capacitance is Farad(F).

1) Capacitance of the parallel plate capacitor is directly proportional to the area of the conductors and hence Area increases, the capacitance also increases.

2) Capacitance is inversely proportional to the distance between the capacitors and hence distance between the capacitors increases, Capacitance decreases.

3)  C = ε₀A/d, where A is the area of the capacitor and d is the distance between the capacitor, and C is the capacitance of the capacitor. The capacitance of the parallel plate capacitor is directly proportional to the area of the parallel plate capacitor and d is the distance of separation of plates.

4) If two identical capacitors are connected in parallel, the potential across the capacitors are same and the charge in the capacitors is different.

5) If the system has two capacitors connected in parallel, the charges remain unchanged and hence the net charge is equal to the individual charges of the capacitors. The net charge of the system is, Q = Q₁+Q₂. Q₁=C₁V and Q₂=C₂V, Q = V(C₁+C₂).

6) The device used to measure the decay of voltage in an RC circuit is the voltmeter. Voltmeter is a device used to measure the potential difference between two points.

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A Scrum Team can be described as an autonomous and a cross-functional team that works on developing product.

It is described as "a framework that enables people to manage complicated adaptive challenges while productively and innovatively producing goods of the greatest quality." Just enough preparation is done upfront by the entire team, then ongoing planning continues throughout the project. Scrum is a project management system that prioritizes collaboration, responsibility, and incremental advancement toward a clear objective. The framework starts with a straightforward directive: Begin with what is visible or understandable. The team begins to have a defined velocity for their work as they get to the performing stage. Small but with sufficient members to produce Product Increment Work together as a team to plan your own workload. Members of the team must be experts. Reports to the Product Owner from Cross Functional.

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Hector is an epic hero in the Iliad due to his nature and best warrior abilities.

Hector is considered the bravest and strongest warrior among all the members of Trojan army. He proved his warrior skills by defeating Archean army when Achilles was absent. He lead the war and came back after winning. The Archeans had to leave.

Hector not only set the Archeans fire to ship but also killed Petroclus. The iliad also suggests that Hector was good in every role, as a son, husband, father and as friend as well. in

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Answer:

3.75 hours

Explanation:

Take 150 divided by 40 = 3.75 hours

Answer:

3.75 hours

Explanation:

The formula for finding time (how long) is t = s/v where s is distance, v is speed and t is time.

We know that the distance that a bus wants to travel is 150 km with an average speed of 40 km/h. Therefore, substitute s = 150 km and v = 40 km/h in the formula:

[tex]\displaystyle{t=\dfrac{150 \, \text {km}}{40 \, \text {km/h}}}\\\\\displaystyle{t=3.75 \, \text{hours}}[/tex]

Therefore, it’ll take about 3.75 hours for a bus to travel 150 km distance.

The u1 =initial speed of the  bullet= 490.86 m/sec is the correct answer.

Linear momentum is a vector quantity that describes an object's motion through space. It is calculated by multiplying the mass of an object by its velocity. Momentum is conserved in closed systems, meaning that it is not changed by any action within the system. This makes it a very useful tool for analyzing the motion of objects and predicting their behavior. Momentum can be transferred between objects, and is often used to describe collisions. It is also used to describe the effects of forces on objects, such as how a force can cause an object to accelerate or decelerate. Momentum is an important concept in physics, and can be used to describe a variety of physical phenomena.

Using conservation of linear momentum, we write

 m1u1 +  m2 u2 = m1 v1  +  m2v2

where u1 ,u2  are the initial velocities of masses m1 and m2

where v1 ,v2  are the final velocities of masses m1 and m2

hence  (.007) (u1)  + 1.5(0) =  1.5(v2)  +  .007(200).........................1

using energy equation for the block alone we get

mgh  = 1/2 m (v2)^2

hence    9.8(.094) =.5 (v2)^2

hence v2=1.357 m/sec

substitute it in 1

we get,            

u1 =initial speed of the  bullet= 490.86 m/sec

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An inclined plane creates a mechanical advantage that reduces the effort required to lift an object to a particular height, but it also lengthens the distance the object must travel.

The slope and height of an inclined plane determine its mechanical advantage. Divide the length of the slope by the height of the slope to determine the ideal mechanical advantage of an inclined plane. A mechanical advantage is created by an inclined plane to lessen the effort required to lift an object to a specific height, but it also lengthens the distance the object must travel. To move the distance and the height of an object going up an inclined plane, the object must move the complete length of the slope of the plane. For instance, if your ramp is 20 meters long and rises 5 meters  high, your trade-off is between going 20 meters  instead of lifting 5 meters  straight up, and your ideal mechanical advantage is 4.

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The thrust of the jet engine is 59804 N and the delivered power is 1.388 MW.

Thrust is defined as the amount of effort required to move an airplane through air that is resisting its passage called drag. Newton's Second and Third Laws could be used to quantitatively explain the reaction force of thrust.

Given

Speed = 232 m/s

Air intake =117 kg/s

Fuel burn rate = 4.8 kg/s

Speed of exhaust gas = 723 m/s

Rate of mass change = 117 kg/s + 4.8 kg/s

                                   = 121.8 kg/s

Thrust T = 121.8 x 723 - 121.8 x 232

Thrust T = 88061.4 - 28257.6

Thrust T = 59804 N

Delivery power = 232 x 59804

Delivery power = 1.388 MW

Thus, the thrust of the jet engine is 59804 N and the delivered power is 1.388 MW.

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Wavelength & frequency were related to energy in the same way that they are to light.Greater energy is correlated with shorter wavelengths and higher frequencies.E = hv is the energy equation.

For an electromagnetic wave, the connection between frequency & energy is as follows.The electromagnetic wave's energy (E) is equal to its frequency times Plank's constant (h) (f).

A wavelength's frequency & energy (E) drop as it gets longer.You may conclude from these equations that wavelength gets shorter as the frequency rises.The wavelength lengthens as the frequency drops.

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Answer:

Avg speed = 60 miles per hour

Explanation:

We generally know that,

→ Speed = Distance ÷ Time

Formula we use,

→ s = d/t

Now the average speed will be,

→ s = d/t

→ s = 180/3

→ [ s = 60 ]

Hence, average speed is 60.

Answer:

The acceleration of the student-bicycle system is 3.52 m/s^2 toward the center of the circle.

Explanation:

Answer:

Phase shift {F(x)} = Asin(Bx-C) + D.

For the auto now no longer to strike the deer, the minimal deceleration ought to be eight m / (s ^ 2) with a blended immediately drivers response took at the distance of 15 metres.

The given parameters are;

The distance farfar from the deer the auto turned into while the motive force notices the deer = 25 m

The velocity of the auto = 20m / s

Therefore, for the auto now no longer to strike the deer, the minimal deceleration of the auto ought to be from 20 ^ 2 / (2 * 25) = eight m/s² for a direct motive force response time

For a motive force response time of 0.five seconds, we have

Distance moved with the aid of using car = 0.five * 20 = 10 metersDistance moved with the aid of using car = 0.five * 20 = 10 meters

Minimum deceleration of the auto required = 20 ^ 2 / (2 * 15) =13. overline three m/s^ 2

Distance of the auto from the deer on the begin of deceleration = 25 - 10 = 15 meters.

Therefore, climate the deer is struck with the aid of using the auto relies upon at the drivers response time and deceleration of the auto.

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The speed of the race car is 14.142 ms−1.

The amount of time that passes between an event's beginning and its conclusion is known as the elapsed time. The time that has gone between the start and finish of an event is known as the elapsed time, to put it simply.

Centripetal acceleration ac is given by the expression

ac=Rω

2=v2R

where

v is linear velocity of the object, ω is its angular velocity and R is the radius of the circle in which object moves.

Tangential acceleration at is given to be =0.500 ms−2

Equating the magnitudes of two and inserting value of  R

we get v2400=0.500

⇒v=√0.500×400=√200=14.142 ms−1

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It sounds like Zeke is most likely in Jean Piaget's stage of cognitive development known as the sensorimotor stage.

This stage typically occurs during the first two years of life, and it is characterized by the development of sensory and motor skills. Children in the sensorimotor stage use their senses and physical actions to explore and understand the world around them, and they learn about objects and their properties through direct interaction with them.

During the sensorimotor stage, children often engage in behaviors such as reaching for objects, grasping and manipulating objects, and putting objects in their mouths as a way of exploring and learning about them. These behaviors help children develop their sense of object permanence, which is the understanding that objects continue to exist even when they are not visible.

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The graph D represents a function.

"A function is a relationship between a number of inputs and outputs." Simply described, a function is an association between inputs in which each input has exactly one output. There is range, codomain, and domain for every function.

We use the vertical line test to determine whether or not the graph accurately depicts a function.

If any vertical line crosses the graph at exactly one point, the graph represents the function; otherwise, it does not.

Observing the graphs, we can say that, the vertical line intersects the graph D at one point only.

Hence, graph D represents a function.

The question is incomplete. It does not contain graphs. It is attached in the attachment below.

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In the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. The works due to friction and the frictional force exerted to stop the two carts over 20 meters is 980 Joules.

Generally, To calculate the work due to friction and the frictional force exerted to stop the two carts over 20 meters, we will need to know the coefficient of friction between the carts and the track, the mass of the two carts, and the acceleration due to gravity.

The equation for work due to friction is:

Work = Friction force * Distance

The equation for the friction force is:

Friction force = Coefficient of friction * Normal force

The normal force is equal to the mass of the two carts multiplied by the acceleration due to gravity:

Normal force = Mass * Gravity

We can substitute these equations into the equation for work to get:

Work = (Coefficient of friction * Mass * Gravity) * Distance

To calculate the work, we need to substitute in the values for the coefficient of friction, mass, gravity, and distance. Let's say the coefficient of friction is 0.5, the mass of the two carts is 10 kilograms, and the acceleration due to gravity is 9.8 meters per second squared. The distance the carts travel is 20 meters.

Substituting these values into the equation for work, we get:

Work = (0.5 * 10 * 9.8) * 20

Solving this equation gives us a final value for the work of: 980 Joules.

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Solar electricity is less effective than wind power. In comparison to solar panels, wind turbines produce more energy overall, use less energy, and emit less CO2 into the atmosphere.

Solar energy is less effective than wind energy. The atmosphere receives less CO2 from wind turbines. Solar panels emit 70 grams of CO2 per hour, compared to 4.64 grams per hour from wind turbines.

20% of the energy captured from the sun may be converted by the most effective residential solar panel on the market. In contrast, wind turbines may convert 60% to 90% of the energy they capture from the wind.

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Friction is a force that prevents two solid objects from rolling or sliding over one another. It's possible that frictional forces, like the traction required to walk while slipping, are advantageous.

A body rolling over a rough surface causes friction. Its coefficient of friction, or or Cf, indicates how rough the surface is. By dividing the normal force by the coefficient of friction, the friction force is calculated. Motion is constantly opposed by the frictional force.

When two items move against one another, like in the case of the books on the table, sliding friction occurs. Because the two things are in contact, sliding friction results.

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The final speed of pluck a is [tex]\sqrt{2}[/tex] times the speed of pluck b.

So we know, F= ma ( m is the mass of the particle and a is the acceleration )

Mass of pluck b =2m

Mass of pluck a = m

The tension in the string is the same and also the surface is frictionless. Hence, the only force acting on both the pluck is the force of tension 'T' .

acceleration of pluck b = T/2m

acceleration of pluck a =T/m

Let the distance traveled by both of them be 's'.

The initial velocity of both the plucks is 0.

We know v²-u² = 2as

u=0 for both plucks.

vₐ²-0 = (2)(T/m)(s)

=> Vₐ= [tex]\sqrt{\frac{2Ts}{m} }[/tex]

Similarly, Vb =[tex]\sqrt{\frac{Ts}{m} }[/tex]

Hence we can easily see, the velocity of pluck a is [tex]\sqrt{2}[/tex] times the speed of pluck b.

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For a distance of 5.0 meters, an object moving at an initial speed of 4.0 meters per second accelerates uniformly at 2.0 meters per second2. What is the object's final speed? Vi=4m/s

The object's final speed after uniformly accelerating in the direction of its motion is 6 m/s.

We apply the third equation of motion to calculate the object's final speed. Where u is the starting velocity, an is the acceleration, and s is the distance traveled, v is the end speed or velocity, a.

20 m/s is the final velocity.

Initial speed is equal to 16 m/s.

Equation 1 can be solved for by substituting these numbers above.

20² = 16²+2×a×36\s36a = 400-256

36a = 144\sa = 144/36\sa = 4

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2+ in [tex]Mg^{2+}[/tex] represents that for becoming stable magnesium needs to release 2 electrons.

As, the atomic number of Magnesium = 12

So, the electron distribution will be like 2, 8, 2

As here, we can see, 2 electrons are present in the outermost orbit of Magnesium, due to which magnesium is not stable.

In order to become stable, Magnesium needs to release its 2 electrons.

After releasing 2 of its electrons, there will be 8 electrons in the outermost orbit of magnesium, and due to the octet in the outermost orbit, magnesium becomes stable.

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It is occasionally regarded as a mental illness, but it is also a method for treating such illnesses.

What does psychology mean by behavioural change?

1. a methodical strategy for using operant conditioning to modify behaviour.

2. Any change in behaviour that has an impact on a patient's functioning, whether it results from psychotherapeutic or other interventions or just happens naturally.

What causes a change in behaviour?

After going through a stressful scenario or seeing an unpleasant incident, a person's mood could change. These behavioural alterations could be the result of a mental health issue, such as: Anxiety:

Anxiety is a feeling of nervousness or uneasiness about a situation.

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The way that  observations of nonscientists, like fisherman be of value to scientists is that:

In science, observation is vital. Scientists gather and record data through observation, which allows them to create and subsequently test ideas and hypotheses. Scientists can observe in many different ways, using their own senses or instruments to increase their vision or hearing.

Science actually takes cultural values into account. In turn, values can be objective if they are founded on widely acknowledged concepts. In contrast, scientists prioritize verifiability, testability, accuracy, precision, generality, and simplicity.

Therefore, In terms of receiving financing and being able to communicate their work to their peers in a way that is clear and understandable, being able to discuss their findings with both scientists and nonscientists is essential for their own professional advancement.

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The total momentum of the system is 22500 kg-m/s i + 37500 kg-m/s j.

Momentum is given by the formula,

P = m * v

where, m is mass

v is velocity

Given that,

Mass of the first car m₁ = 1500 kg

Mass of the second car m₂ = 1500 kg

Velocity of the first car v₁ = 25 m/s

Velocity of the second car v₂ = 15 m/s

The momentum of the first car is p₁ = m₁ * v₁ = 1500 * 25  = 37500 kg-m/s j

The momentum of the second car is p₂ = m₂ * v₂ = 1500 * 15  = 22500 kg-m/s i

The total momentum of the system is sum of momentum of both the cars.

⇒ 22500 kg-m/s i + 37500 kg-m/s j

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Answer:

A

Explanation:

Current Job Market, Variable Ratio Schedule, Type A subjects recover to baselines rates much slower than Type B subjects., Specific challenging activities and commitment to goals,True

1) Current Job Market

Numerous studies have demonstrated a favourable correlation between organisational dedication and an employee's age, tenure, and educational attainment.

2) Variable Ratio Schedule

A reinforcement that strengthens behaviour after an erratic number of responses is known as a variable-ratio schedule.

3). Individuals with Type A personality commonly exhibit traits such as competitiveness and assertiveness, high levels of aggression and impatience, always associate themselves with winning than losing (i.e. achievement-oriented), and functioning at a quick pace. Most of them are highly dedicated to work and therefore force themselves into things that may not necessarily be interesting for them.

In the computer game experiment, Type A subjects are likely to show significantly higher stress response rates but beat the game more often than Type B subjects. Although both type A and B subjects are exposed to the same stress levels, Type A subjects experience more physiological stress and are likely to function better at those stress levels. Moreover, Type A subjects recover to baselines rates much slower than Type B subjects.  

4) Specific challenging activities and commitment to goals

According to Locke's theory of goal setting, situations that are challenging and conscious objectives drive human behaviour.

5) True

According to numerous research done to ascertain the connection between age and absenteeism.

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The evolution of an elliptical galaxy involves a gradual decrease in star formation and a steady increase in its size.

Over time, gas and dust are depleted, leaving behind an aging stellar population and a low level of star formation. As star formation declines, the galaxy's mass slowly increases, forming a larger and more elliptical shape.

The evolution of a spiral galaxy is different in that the spiral structure is maintained over time. Gas and dust are continually replenished, providing the necessary materials needed for ongoing star formation. As a result, the stellar population remains young and active, and the galaxy maintains its distinct spiral shape.

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Answer:

ofc it is D because the distance is far and the plane is the fastest.

Explanation:

Answer:

The answer is A

Explanation:

Most postal company hany ships with large amounts of mail because it is the cheapest way to send mail.

The greater efficiency achieved with the curved blades of a Pelton wheel is due to the fact that the curved blades are able to extract more kinetic energy from the moving water.

This is because the curved blades are able to direct the water onto a smaller area of the wheel, which results in a higher impact force and a greater transfer of energy from the water to the wheel.

In contrast, flat blades are not as effective at extracting kinetic energy from the water because they do not focus the water onto a smaller area of the wheel. As a result, the impact force is lower and less energy is transferred from the water to the wheel.

The Pelton wheel is a type of impulse turbine that is used to harness the energy of falling water in hydropower plants. It consists of a wheel with curved blades mounted on a shaft, which is turned by the impact of water jets that are directed onto the blades. The efficiency of the Pelton wheel can be improved by using a greater number of blades, which can increase the impact force and the transfer of energy from the water to the wheel.

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