A seesaw is 3.2 m long, with the pivot at the center. A 580 N girl sits at one end. Where would the 670 N boy need to sit to balance the seesaw?

When two wires are placed in series and current flows in opposite directions inside them, the magnetic fields generated by each wire will interact in the region between the two wires. According to the right-hand rule for determining the direction of a magnetic field, we can determine the directions of the magnetic fields in this scenario.

The right-hand rule states that if you point your thumb in the direction of the current flow, your curled fingers will indicate the direction of the magnetic field created by that current. In this case, since the current flows in opposite directions in the two wires, the magnetic fields will also be in opposite directions.

To be more specific, let's assume that wire A has current flowing from left to right and wire B has current flowing from right to left. If you place your right-hand thumb along wire A pointing towards the right, your curled fingers will wrap around wire A in a clockwise direction, indicating the direction of the magnetic field created by wire A. Conversely, if you place your right-hand thumb along wire B pointing towards the left, your curled fingers will wrap around wire B in a counterclockwise direction, indicating the direction of the magnetic field created by wire B.

Therefore, the magnetic fields in the region between the two wires will be in opposite directions. Wire A will create a clockwise magnetic field, while wire B will create a counterclockwise magnetic field.

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An ideal air-filled parallel plate capacitor with plate a separation of 4.0 cm has a plate area of 0.040 m2. what is the capacitance of this capacitor with air between these plates 8.9 pF.

An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its plates.

The capacitance of a parallel plate capacitor depends on area of each plate, dielectric medium between the plates and distance between the plates.

The amount of energy stored in a plate capacitor is given by

⇒ U = \(\frac{Q^{2}}{2C}\),

where, Q is the stored charge and C is the capacitance,

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Newton's third law of motion states that for every action, there is an equal and opposite reaction. The action-reaction pair is used to describe the interaction between two objects. Therefore, when a car is speeding up as it drives along a level road, an action-reaction pair occurs.

An action-reaction pair is a pair of forces that are equal in strength and opposite in direction. When an object exerts a force on another object, the second object exerts an equal and opposite force on the first object. The action-reaction pair when a car speeds up as it drives along a level road can be explained as follows: Action force: The car exerts a force on the road in the forward direction. This is the action force. Reaction force: The road exerts a force on the car in the backward direction. This is the reaction force.

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E = k * (Q / r²). Where E is the electric field intensity, k is the Coulomb's constant (9 x 10⁹ N ), Q is one of the rings' charges, and r is the distance between their centres. The electric field strength is 3125 N/C.

Thus, the distance between the centres of the two rings is r = 24.0 cm, and both rings have the same charge, Q = 20.0 nC.

Transforming the charge from nano Coulombs to Coulombs first Q = 20.0 nC = 20.0 x 10⁹ C

The strength of the electric field:

E = [(20.0 x 10-⁹ C) / (24.0 x 10-2 m)] * [(9 x 10 ⁹)

E = (9 x 10⁹ ) * (20.0 x 10⁹) / (0.24)

E = (9 x 10⁹) * (20.0 x 10⁹ C) / 0.0576

E ≈ 3125 N/C.

Thus, E = k * (Q / r²). Where E is the electric field intensity, k is the Coulomb's constant (9 x 10⁹ N ), Q is one of the rings' charges, and r is the distance between their centres. The electric field strength is 3125 N/C.

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Answer:

Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.

Explanation:

I hope that this would be helpful

Answer:

-Relative refractive index– It is the ratio of speed of light in one medium to the speed of light in another medium

-Absolute refractive index– It is the ratio of light in vacuum to the speed of light in another medium.

Explanation:

Answer: C. Radio wave

Explanation:

The order of energy of electromagnetic waves from least to greatest is

Radio waves, microwaves, infrared, red, ultraviolet, x ray and gamma waves. Thus, the type of electromagnetic wave has less energy than a microwave is

C. Radio wave

The central sulcus is located in front of the parieto-occipital sulcus, which divides the parietal lobe from the occipital lobe. The somatosensory cortex is contained within it, which is in charge of processing sensory data.

The top layer of your cerebrum is called the cerebral cortex. Your brain's largest region is called your cerebrum. Your brain is split into two parts by your cerebrum, which is known as hemispheres. A group of nerve fibers known as the corpus callosum holds the hemispheres together.

Processing of sensory data is carried out by the posterior horn. To the skeletal muscles, the anterior horn transmits motor signals. The primary structure of the sympathetic division of the autonomic nervous system is the lateral horn, which is only present in the thoracic, upper lumbar, and sacral regions.

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Answer:

it would be 25.44 lbs

Explanation:

Answer:

a and d

Explanation:

From Coulomb's law, the sets of charges of +2 C and -2 C, and +2 C and +2 C are experiencing the strongest forces, both with a magnitude of 36 N.

The strength of the electrostatic force between two charges depends on the magnitudes of the charges and the distance between them, as given by Coulomb's law. The larger the magnitude of the charges and the smaller the distance between them, the stronger the force.

A fundamental characteristic of matter called charge describes how it interacts with magnetic and electric fields. It is commonly measured in coulombs (C), can be positive or negative, and can also be zero.

Protons and electrons are examples of subatomic particles that have electric charge.

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Answer:

4 amp

Explanation:

From ohm's law,

V=IR

so,

I=V/R

I=120/30

I=4amp ans..

Answer:

is the process of spreading

A centrifuge is a device that can spin things at very high speeds. An artificial gravity that acts in the direction of the center of rotation and a significant centripetal acceleration are the results of this. The centripetal force and acceleration act in the direction of the center of rotation.

Since the centrifuge has a radius of 0.104 m, the claim is true.

Let's first change the angular speed to rad/s.

The property of an object moving around a circle is known as centripetal acceleration. Centripetal acceleration can be applied to any object that is moving in a circle and has an acceleration vector pointing toward the center of the circle.

Centripetal accelerations are caused by centripetal forces. The gravitational attraction between the Earth and the Sun, as well as any satellite's circular motion around any celestial body, is the unique cause of the centripetal force that causes the motion.

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Answer: becuase----Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.

Explanation: hope i helped c:

Answer:

-5

Explanation:

-15/3

Answer:

Temperature: measure of the average kinetic energy of a substance

Internal energy: total potential and kinetic energies of the particles in a substance

Heat: thermal energy that flows from one substance to another

Thermal energy: part of internal energy that can be transferred

Explanation:

Proof for correct answers on edge :)

Answer:

50m/s

Explanation:

v = f*w

Answer:

50 ans..

Explanation:

Data :

v = ?

wavelength= 2.5 m

f = 20 Hz

Formula:

speed = (frequency )(wavelength)

Solution:

v = ( 20 )( 2.5 )

v = 50 metre per second Ans ...........

a. The total kinetic energy of two moving objects can be zero. This is true because the kinetic energy depends on the mass and speed of the objects. If two objects with equal mass move in opposite directions with the same speed, their kinetic energies will cancel out, resulting in a total kinetic energy of zero.

b. The total momentum of two moving objects can be zero. This is also true because momentum is the product of an object's mass and velocity. If two objects with equal mass move in opposite directions with the same velocity, their momenta will cancel out, resulting in a total momentum of zero.

c. The kinetic energy of an object doubles if the speed of an object doubles. This statement is not true. The kinetic energy of an object is proportional to the square of its speed, which means that if the speed of an object doubles, its kinetic energy increases by a factor of four.

d. If the kinetic energy of a system increases, the momentum of the system also must increase. This statement is not necessarily true. The momentum of a system depends on the mass and velocity of the objects in the system, while the kinetic energy depends only on the speed of the objects. It is possible for the kinetic energy of a system to increase without a corresponding increase in momentum, or vice versa.
Hello! Here's an analysis of the given statements:

a. The total kinetic energy of two moving objects can be zero: False. Kinetic energy is always positive, so the sum of two positive values cannot be zero.

b. The total momentum of two moving objects can be zero: True. If the magnitudes of their momenta are equal and opposite, they can cancel each other out, resulting in a total momentum of zero.

c. The kinetic energy of an object doubles if the speed of an object doubles: False. Kinetic energy is proportional to the square of the speed (KE = 0.5 * m * v^2), so if the speed doubles, the kinetic energy will increase by a factor of 4, not 2.

d. If the kinetic energy of a system increases, the momentum of the system also must increase: False. It is possible for the kinetic energy to increase without a change in the total momentum (e.g., in a collision where the final velocities are equal and opposite).

So, the true statement among the options is: (b) The total momentum of two moving objects can be zero.

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Solar energy and terrestrial reradiation are usually measured in units of length called micrometers.

Radiometers are sensors that can be used to measure solar and terrestrial radiation. These sensors detect electromagnetic radiation and convert it into a measurable electrical signal. The energy that the sensor detects can be measured in units of length called micrometers (µm).

One common type of radiometer is a pyranometer, which measures the total amount of incoming solar radiation. Another type of radiometer is a pyrgeometer, which measures the amount of outgoing longwave radiation from the Earth's surface. Both of these sensors measure radiation in units of micrometers.

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The rotational kinetic energy of the armadillo has increased by 25 joules.

This is because the armadillo is rolling down the hill, which means that it is rotating around its center of mass. As it rolls, it is converting its gravitational potential energy into translational and rotational kinetic energy.

Since the gravitational potential energy has decreased by 40 joules and the translational kinetic energy has increased by 15 joules, the remaining 25 joules must have been converted into rotational kinetic energy. This means that the armadillo's rotational kinetic energy has increased by 25 joules.

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Answer:

When choosing a location for a new optical observatory on Earth, there are several factors to consider. Some of the key factors include:

Taking into account these factors, some of the best locations for optical observatories on Earth are high-altitude sites in remote, dry, and mountainous areas, like Mauna Kea in Hawaii, Cerro Paranal in Chile, or Roque de los Muchachos Observatory in Spain!

Parallel information system is when an old information system in shut down and a new system starts up right after the shut down.

An information system is a system in which information are passed or transmitted from one end to another especially from senders to receivers to achieve a particular goal.

Therefore, Parallel information system is when an old information system in shut down and a new system starts up right after the shut down.

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If the electric field between the plates of a given air-filled capacitor is weakened by removing charge from the plates, the capacitance of that capacitor does not change.

Capacitance is the amount of charge that can be stored at a given voltage by an electrical component called a capacitor.

C=Q/V

The unit of capacitance is the Farad (F)

C = εA/d,

C is capacitance; ε is permittivity, a term for how well dielectric material stores an electric field; A is the parallel plate area; and d is the distance between the two conductive plates.

electric field between two parallel conducting plates depends on the electric potential or voltage of the two plates and the distance between the two plates. So, the electric field E=Vd E = V d where d is the distance between the two charged plates.

The force on the charge is the same no matter where the charge is located between the plates. This is because the electric field is uniform between the plates.

If the electric field between the plates of a given air-filled capacitor is weakened by removing charge from the plates, the capacitance of that capacitor does not change.

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Answer:

"a prank and an Internet meme involving an unexpected appearance of the music video for the 1987 Rick Astley song "Never Gonna Give You Up". The meme is a type of bait and switch using a disguised hyperlink that leads to the music video."

Explanation: G O O G L E

Answer:

here:Rick Astley - Never Gonna Give You Up (Official Music Video)

Explanation:

Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen.  The correct option is A , B and C.

A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.

Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.

They survive in space and for long time for about 10 days. They can live without water for decades.

Thus, the correct option is A , B and C.

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Around 3 p.m., when the sun is sufficiently low in the sky, more heat is lost than is received.

Even though the sun's beams are most direct around noon, the afternoon is the warmest part of the day because air temperatures close to the earth's surface will continue to rise as long as incoming solar radiation outweighs outgoing longwave earth radiation.

Around 3 p.m., it gets the warmest. When the sun is at its zenith in the sky, or after midday, heat continues to accumulate as long as more heat is entering the earth than is leaving. When the sun is low enough in the sky, around 3 p.m., more heat is lost than is gained.

Many people believe that noon is when it gets the warmest. We receive the maximum energy from the sun at noon, which may make it feel hotter. But during the day, Earth is accumulating heat or energy from incoming sources. The air becomes warmer as the day goes on.

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Answer:

The reaction rate decreases with a decrease in temperature.

Explanation:

The average speed of blood is less than 0.90 m/s.

The blood flows in the body of a person at the speed of less than 0.90 m/s. In miles per hour, the value is 2 which means the blood flows at the rate of 2 miles per hour. We know that blood is very important for the survival of all humans. This blood is a source of transportation of oxygen and waste material in the body like carbondioxide gas. This speed of of less than 0.90 m/s is optimum for the exchange of gases between blood and cell.

So we can conclude that the average speed of blood is less than 0.90 m/s.

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