What are two types of “non-contact forces”?

The magnetic field of an electromagnet can be strengthened in the following ways.

Increasing the current through the coil. The magnetic field's strength is inversely proportional to the current through the coil. The magnetic field of electromagnet will get stronger as the current increases.

Increase the number of wire turns in the coil to increase the magnetic field's strength.

By inserting a ferromagnetic core, such as iron, inside the coil, the magnetic field's intensity can be greatly increased.

Reducing the space between the coil and the core. The magnetic field gets stronger as the space between the coil and the core gets smaller.

Expanding the coil's surface.

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The velocity of the sled after one minute is 10.6 m/s.

The velocity of the sled after one minute is calculated by applying Newton's second law of motion and formula instantaneous power as shown below.

P = Fv

where;

P = mav

P = m (v/t)v

P = mv²/t

Pt = mv²

v² = Pt / m

v = √ ( Pt / m )

where;

The velocity of the sled after one minute is calculated as;

v = √ ( 187.5 x 60 / 100 )

v = 10.6 m/s.

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In this situation, both balls will exert electrostatic force on each other in the first example.

Part b)

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Complete question : Two identical metal balls are suspended by insulating threads. Both balls have the same net charge. In this problem, do not assume the balls are point charges. a. Draw a separate free-body diagram for each ball. Label the forces to indicate: - the object exerting the force, - the object on which the force is exerted, - the type of force (gravitational, normal, etc.), and - whether the force is a contact or a noncontact force. b. Suppose the charge on the second ball is reduced slightly, so that it is less than that on the first ball. Predict whether the angle that ball l makes with the vertical will be greater than, less than, or equal to the angle that ball 2 makes with the vertical. Explain. Sketch your answer above. Name Ball I Ball 2 Free-body diagram Free-body diagram for ball I for ball 2 - - Ball I Ball 2 How does the free-body diagram for each ball in this case compare to the corresponding freebody diagram that you drew in part a

The fact that the item is approaching you explains why the waves are closer together.

The Doppler Effect can be used to both sound and light sources. For instance, the sound waves' frequency rises when a sound object approaches you, raising their pitch. The frequency of the sound waves increases as it moves toward you, but the pitch falls as it moves away from you.

The difference in PITCH between a sound's source and listener due to motional interaction. The perceived pitch changes depending on how close or far the listener and sound source are to one another. As they draw closer, it is higher than the source's stationary pitch.

The fact that the item is approaching you explains why the waves are closer together.

Therefore, the correct answer is option 3.The waves are closer together because the object is approaching.

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The waves become closer together because the thing is coming towards you. Hence  option 3 is correct.

The Doppler Effect can be used to both sound and light sources. For instance, the sound waves' frequency rises when a sound object approaches you, raising their pitch. The frequency of the sound waves increases as it moves toward you, but the pitch falls as it moves away from you.

The difference in PITCH between a sound's source and listener due to motional interaction. The perceived pitch changes depending on how close or far the listener and sound source are to one another. As they draw closer, it is higher than the source's stationary pitch.

The fact that the item is approaching you explains why the waves are closer together.

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An ice cube will shortly melt if you grasp it in your hand. Conduction is the direct heat transfer from one matter to another. Hence, it is conduction.

If two objects have various temperatures, heat will flow from the hot object to the colder side. For instance, when you hold an ice cube, heat is moved from your warm hand to the ice and melts it.

Liquids and gases increase as they heat up and fall as they cool, generating circular convection currents.

We touch the ice cube it will begin melting which means that the energy is being moved from our hand to the ice cube. When energy is conveyed from surroundings to the system, this is an endothermic move and so, ΔH>0.

On the opposite, when your hand meets an ice cube or any object with a lower ambient temperature than your hand you start to feel cold, as body heat is moved to the colder object.

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When spheres A and B are separated from one another, each sphere has a charge of -80 nC.

To sphere A, there were 1,010 electrons transported.

The amount of charge that the electrons carry is first divided evenly throughout each sphere when they come into touch with one another. The charge on each sphere is maintained at its initial value even after the spheres are later moved apart from one another.

A single electron has a charge of -1.6 106.

Therefore, 1.0 10 12 is the stated value for the charge carried by the electrons.

Q= (1.0× 10 ^ 12)(-1.6× 10^6)

Q= -1.6 × 10^7

The quantity of charge is equally disrupted on both spheres due to the fact that each sphere's contribution to the total charge is half of it.

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The answer is that the meteorite will strike the Earth at a speed of 2.31 x 10²⁰ N·s/m, depending on its mass.

Assuming the meteorite falls in a vacuum and there are no other forces acting on it, it will accelerate as it falls towards the Earth. This acceleration is caused by the gravitational force of the Earth, which is equal to:

F = GMm/r²

where G is the universal gravitational constant, M is the mass of the Earth, m is the mass of the meteorite, and r is the distance between the two objects.At a height of 3.41 x 10⁷ m, the gravitational force can be calculated as follows:

F = (6.67 x 10⁻¹¹) (5.97 x 10²⁴) (m) / (3.41 x 10⁷)2

F = 6.64 x 10¹⁴ N

This is the force causing the acceleration of the meteorite.

The acceleration can be calculated using Newton's Second Law, which states that the force is equal to the mass times the acceleration.

F = ma

Solving for a, we get:

a = F/m

Plugging in the values we calculated above, we get:

a = (6.64 x 10¹⁴ N)/m

By the time the meteorite reaches the surface of the Earth, it will have accelerated to a velocity equal to the integral of the acceleration over time. This can be expressed as follows:

v = ∫a dt

This integral can be solved using the equation for acceleration we derived above:

v = ∫(6.64 x 10¹⁴ N/m)dt

Solving for v, we get:

v = (6.64 x 10¹⁴ N/m)t

At the surface of the Earth, the time since the meteorite was at a height of 3.41 x 10⁷ m is equal to:

t = (3.41 x 10⁷ m)/(9.8 m/s²)

t = 3.48 x 10⁵ s

Plugging this into our equation for velocity, we get:

v = (6.64 x 10¹⁴ N/m)(3.48 x 10⁵ s)

v = 2.31 x 10²⁰ N·s/m

Finally, we can convert this to speed by dividing by the mass of the meteorite:

v = (2.31 x 10²⁰ N·s/m)/m

So, the answer is that the meteorite will strike the Earth at a speed of 2.31 x 10²⁰ N·s/m, depending on its mass.

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Since the velocity is represented by the slope on a position versus time graph, a car moving at a constant speed must be represented by a line of constant slope.

The following diagram illustrates the differences between an object with constant acceleration and one with constant speed. While the speed of the other object stays constant, the speed of the object with linear acceleration increases linearly with time and distance.

An object moving at a constant speed could be compared to an object in orbit. "Constant speed" refers to a speed that doesn't change over time—rather, it just stays the same. This indicates that both velocity and acceleration are absent or equal to zero.

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Increase the amplitude to 4xo and stand 8 meters from the source. A sound wave with amplitude xo is measured by an observer to have an intensity of I0 when the observer is standing 4. 0 meters from the source.

Source is a term used to describe the origin or starting point of something. It can refer to the origin or beginning of a physical object or concept, like the source of a river or the source of a new idea. It can also refer to the person or thing that supplies or produces something, such as the source of a story or the source of a product.

In science, source is used to describe the origin or cause of something, such as the source of an infection or the source of an environmental pollutant. Source, in its various forms, is a key concept in many fields, from engineering and science to business and economics.

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Answer:

C.

Explanation:

Increase the amplitude to 2xo and stand 2 meters from the source.

"The force that can cause an object to rotate along an axis is measured as torque." Similar to how force accelerates an object in linear kinematics, torque accelerates a body in an angular direction.

Torque is a measure of the turning effect of an applied force about a specific point or axis. It is computed by multiplying the force exerted on a body by the separation between the point of rotation and the application of the force.

The torque increases as the force or distance from the centre of rotation increases. The unit of torque is typically Newton-meters (N·m) in the International System of Units (SI) or pound-feet (lb·ft) in the imperial system. In several fields, including physics, mechanics, engineering, and robotics, torque is important.

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It will take 43.075 seconds for the shell to reach the distance of 6.00*10^2 m.

Use the equation of motion y(t) = y₀ + v₀t + ½at² -----(1)    for finding the time taken to reach a particular height, Which is 6.00*10^2 = 600 meters. The motion of the shell will be projectile as g(gravitational) pull will be acting against the motion.

So

✦ Plug in the values of the equation.

✦ 600 = 225t - 4.9t² .................... Putting the values in Equation 1

✦ Reorder the equation to form it into the quadratic formula.

✦ 4.9t² - 225t + 600 = 0

✦ Solve for t

✦ t = 43.075

It will take 43 seconds for the shell above the ground.

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The mechanical energy that the object have relative to the ground is 18 J

The energy that is possessed by an object because of its motion or because of its position is referred to as the object's mechanical energy. The term "mechanical energy" refers to the total amount of an object's kinetic and potential energies added together. To find the mechanical energy, we can use this following formula:

Mechanical Energy (M.E.) = Kinetic Energy (K.E.) + Potential Energy (P.E.)

Kinetic Energy (K.E.) = (1/2) m v²

Potential Energy (P.E.) = m × g × h

According to the data, we are given that:

The mass of object (m) = 4 kg

The velocity of object (v) = 3.0 m/s

The acceleration due to gravity (g) = 9.8 m/s

The height of object from ground (h) = 0.75 m

Potential energy in this case is 0 because the object is moving.

Hence, the mechanical energy would be:

Mechanical energy = (1/2) m v² + m x g x h

Mechanical energy = ((1/2) x 4 x 3²) + 0

Mechanical energy = 18 + 0

Mechanical energy = 18 j

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The matter orbiting black holes must be hotter than the matter orbiting stars. Correct answer: letter A.

As matter falls into a black hole, it is subject to extreme gravitational forces which compress the matter and heat it up. This heated matter can then emit X-rays, which are much more energetic than the infrared light emitted by matter orbiting stars.

In addition to the extreme gravitational forces, the matter around black holes is also subject to strong magnetic fields. These fields can accelerate particles to near the speed of light, producing powerful jets of matter and energy. These jets are also much brighter in X-rays than the infrared light emitted from stars. This further explains why the matter orbiting black holes emits X-rays, while the matter orbiting stars emits infrared light.

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2 needs to be added in front of Fe₂O₃ to make it balanced.

Balanced equation: 4Fe + 3O₂ → 2 Fe₂O₃.

A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

You can solve equations on your own by adhering to some basic guidelines: Verify if the equation's formulas are all accurate. Focus on just one element at a time. In balancing, huge numbers are added.

The chemical reaction is a balanced chemical equation because it complies with the law of conservation of mass.

To match up the amount of atoms in the reactants and products, a chemical equation must be balanced. Following the law of conservation of mass requires that a chemical equation be balanced.

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Stars endure their whole existence in a finely defined equilibrium, or balance, between two strong forces: gravitational pull and outward pressure.

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Torque is measured as a vector quantity. The torque vector's direction has been determined by the force upon this axis.

Torque would be a twisting force that refers to the rotating force of an engine as well as determines the percentage of that twisting force accessible when the engine exerts oneself. Torque can be found in everyday activities such as turning a doorknob, breaking a drink bottle, using a tool, and peddling a bicycle.

Example: T = F r sin would be the torque. As a result, the magnitude of such torque = (800N) (0.4m) = 320 Nm. As a result, the magnitude of such torque was 320 Nm.

Torque is defined as the combination of force (unit N) as well as the perpendicular distance (unit m) of the force line from either the axis. As a result, the SI unit of torque becomes Nm.

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It depends on the size and weight of the box, as well as the size of the truck.

Generally speaking, it may take more work to pick up a box straight up into the back of a truck, as it requires more physical strength and effort. However, pushing a box up a ramp into the back of the truck could require more energy, as the person pushing the box must contend with the ramp's incline.

When it comes to the amount of work needed to move a box into the back of a truck, it largely depends on the size and weight of the box, as well as the size of the truck. Picking up a box straight up into the back of a truck requires a great deal of physical strength and effort, as the person must be able to lift the box up to the desired height in order to get it into the truck.

On the other hand, pushing a box up a ramp into the back of the truck could require more energy, as the person pushing the box must contend with the ramp's incline. Additionally, if the box is particularly heavy, pushing it up a ramp could require more effort than simply lifting it up and into the truck. Therefore, it is difficult to definitively say which requires more work, as it depends on the specifics of the situation.

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Positive feedback differs from negative feedback because positive feedback tends to enhance the triggering stimulus while negative feedback tends to return the body to a homeostatic balance or "ideal" level.

Positive feedback increases the initial cause of action or the initial stimulus and repeating the course of action that is started because of the stimulus while negative feedback reduces the initial stimulus, thus bring the body back to normal.

Stimulus is an external signal to which the body responses.

Homeostasic balance is the body's tendency to regulate and maintain internal conditions such as temperature, metabolism etc

It is the amplification of an effect by its own influence on the process which gives rise to it.

It is the negative regulation of an effect by its own influence on the process that gives rise to it.

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At an object's lowest point, kinetic energy is zero/maximum while potential energy is zerg/maximum. Potential energy is the energy stored by an item as a result of its location relative to other objects.

internal tensions, electric charge, or other reasons.  The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common forms of potential energy. The joule, denoted by the sign J, is the unit of energy in the International System of Units Although it has connections to Greek philosopher Aristotle's notion of potentiality, the word potential energy was coined by the 19th-century Scottish engineer and physicist William Rankine. Potential energy is related with forces acting on a body in such a way that the total work is increased.

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The Work done by a car that applies a force of 36.8 newtons for a 668-meter loop is 24582 J.

Work done is defined as the amount of energy transferred or transformed by a force acting on an object over a distance. Work done can be positive, negative, or zero.

Positive work is done on an object when the force and distance are in the same direction. Negative work is done on an object when the force and distance are in opposite directions. Zero work is done on an object when the force is perpendicular to the distance. Unit of work done is Joules.

Mathematically, work done is represented by the equation:

Work done = Force x Displacement

Force applied = 36.8 N

Displacement = 668 m

Work done = 36.8 * 668

Work done = 24582 J

It can be rounded up to 24600 J.

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The oscillations of the particles within the water wave shown below provide energy.

A wave involves a disturbance which travels or propagates without the conveyance of materials. Sound/ultrasonic waves, electromagnetic waves, as well as earthquake waves are some examples.

Mechanical waves, including such water or sound waves, travel within or on the surface of an elastic material.

Electromagnetic waves, like as radio and microwave, can travel in a vacuum. Matter waves, which have been observed in elementary particles, can exhibit wavelike behaviour.

The medium particles are just not carried alongside the wave. They move in short circles around an equilibrium position, although the wave itself can go a long distance.

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The angle of incidence is also 90o since the angle of refraction and the angle of incidence are complimentary angles that are measured from the light beam to the normal to the incident/refractory surface.

The angle of incidence is the angle formed by the normal and the light beam. You calculate the angle between the light ray and the normal, which is 0 degrees. Angle of incidence: This is the angle formed between the incident beam and the normal. Angle of reflection is the angle that is created between the incident and reflected rays. At the point of incidence, the normal line is the one drawn perpendicular to the reflecting surface. The angle of incidence is the angle formed by a line drawn perpendicular to the reflecting barrier and the wave's direction of travel.

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The distances of closest approach for b = 1.30 x 10^-12 m, 1.40 x 10^-13 m, and 1.10 x 10^-14 m are approximately:

The distance of the closest approach is determined by the combination of the initial kinetic energy and angular momentum of the alpha particle and the attractive force from the lead nucleus. The larger the value of b (initial angular momentum), the smaller the distance of closest approach as the alpha particle is less likely to collide directly with the center of the lead nucleus.

The distance of closest approach is also dependent on the mass of the alpha particle and the charge of the lead nucleus, which is why it is different for each value of b.

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Answer:

Explanation:

blb

Any material of two or more substances that can be physically separated are generally homogenous mixture of more then one or two substances.

Mixtures can be either homogeneous or heterogeneous. Homogeneous mixtures have the same composition and appearance throughout, while heterogeneous mixtures have different compositions and/or appearances in different regions.

Examples of homogeneous mixtures include:

1. Salt water (salt dissolved in water)

2. Air (a mixture of gases such as nitrogen, oxygen, and argon)

3. Alloys (a mixture of metals such as gold and silver)

Examples of heterogeneous mixtures include:

1. Soil (a mixture of minerals, organic matter, water and air)

2. Concrete (a mixture of cement, water, sand and aggregate)

3. Salad (a mixture of vegetables and fruits)

It is important to note that mixtures of several material can be separated into their individual components through physical means such as filtration, distillation, and centrifugation. The properties of the mixture are usually different from the properties of the individual components, and the properties of the mixture are usually an average of the properties of the individual components.

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The position of the cannonball  at 2.5 seconds is 9.375 meter.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.

Acceleration is a vector quantity since it has both a magnitude and a direction.

Hence, the position of the cannonball  at 2.5 seconds is

= 16 m/s × 2.5 s + 1/2 × (-9.8)× (2.5 s)²

= 9.375 meter.

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A horizontal line in a vs t graph shows that the change in acceleration with time is 0.

The acceleration-time graph depicting the acceleration as a function of time for a particle traveling in a straight line is shown below. Acceleration values are plotted on the y-axis of the acceleration-time graph, while time values are plotted on the x-axis.

On the graph of acceleration vs time, the horizontal line indicates that there has been no change in acceleration with respect to the passage of time. The magnitude of the acceleration maintains its original value regardless of the passage of time. This kind of acceleration is referred to as either uniform acceleration or constant acceleration.

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The highest Potential energy on a swing is at the top of its oscillation or the highest point of its arc.

A swing is a type of oscillating system that moves back and forth, and it is driven by the gravitational force acting on its center of mass. The Potential energy of a swinging object is determined by its position relative to a reference point. The highest point of the swing is the point where the potential energy is at its maximum, and the lowest point of the swing is where the potential energy is at its minimum.

As the swing goes up, the gravitational potential energy increases, and as it goes down, the gravitational potential energy decreases. At the highest point of the swing, the speed of the swing is zero and the gravitational potential energy is at its maximum, at this point all of the energy is stored as potential energy. As the swing goes down, the potential energy decreases and the kinetic energy increases and at the lowest point of the swing kinetic energy is at its maximum and potential energy is at its minimum.

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The action-reaction force pairs are the pairs of forces which have an equal and opposite magnitude and direction on the object.

Action-reaction force pairs are the forces of equal magnitude and opposite directions which can act on different objects. They never act on the same object present in the space. Newton's third law states that forces are the result of interactions. An object cannot exert a force on another object without feeling any reaction force itself.

A. A skier uses her ski poles to start moving downhill, in this case the skier is applying a force on the ski poles to move forward however, there is resistance force against it.

B. A boat propeller spins rapidly in the water. A propeller applies force to move in the water however, if it is in the direction of motion of water, then it moves faster otherwise it will face resistance.

C. A baseball player hits a pitched ball with a bat, in this case while pitching the ball, the baseball player will experience a force against the direction of throw

D. A party balloon contains rapidly moving helium atoms, in this case the rapidly moving atoms exert force on the balloon which is balanced by the force applied by the balloon material on it. If the force of helium atoms increase, then the balloon may blast.

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The longest wavelength are gamma rays.

Radio waves 20 cm

Infrared waves

0.3 mm - 20 cm

Infrared waves

800 nm - 0.3 mm

400 to 800 nm of visible light

X-rays 3 pm–300 pm, ultraviolet radiation 300 pm–400 nm

Gamma rays 3 pm.

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