What is total energy formula?

Answer:

4) we take a can of cold soda there is a transfer from hand to can.  a current passes through a light bulb, it becomes incandescent and gives ligh

5) the law of energy conservation states that energy is neither created nor destroyed, therefore what happens is that you use energy and transform it into another type of energy,

Explanation:

4) This exercise is asked to give some examples of thermal and electrical energy transfer

the transfer of thermal energy occurs when we grasp a hot or cold body due to the difference in temperature between the body and us there is an exchange of heat, for example when drinking a cup of hot coffee there is a transfer of energy from the cup to the hand .

If we take a can of cold soda there is a transfer from hand to can.

Electrical transfer occurs, for example, when a current passes through a light bulb, it becomes incandescent and gives light.

In all modern electrical appliances there is transformation of electrical energy

5) the law of energy conservation states that energy is neither created nor destroyed, therefore what happens is that you use energy and transform it into another type of energy,

For example, when you lift a box, the potential energy of the box increases with height, but the energy of the person decreases because it does work that is negative.

In amusement park rides, the energy accumulated in one part of the game generally with height is transformed into energy of movement in another part of the game, but the total energy remains constant.

The statement of equipotential lines passing through a point perpendicular to the direction of the electric field at that point is true.

Equipotential fields are fields where every point in the field has the same electric potential. For an electric charge, the equipotential field is a spherical shell and the electric field lines are radial and always perpendicular to the equipotential field. Any electric charge transferred in the equipotential field requires no work.

In mathematics and physics equipotential refers to a region in space where every point in it has the same potential. In electricity, it can be defined as the position of points that have similar potential values. Equipotentials are often referred to as equipotential surfaces or fields, namely fields that have a set of points that are spread continuously and have similar potentials.

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Two conditions of reactants must be met for a reaction to proceed: reactants must collide, and they must have sufficient energy.

What is a reaction?

A chemical reaction occurs when two or more atoms, molecules, or ions combine or separate to create new compounds or products. The process that transforms one set of chemical substances into another is referred to as a chemical reaction.

What is a reactant?

A reactant is a substance that undergoes a chemical reaction to create a product. A reaction involves the combination or separation of two or more atoms, ions, or molecules to form a new product.

Why is it essential for the reactants to collide?

The collision theory is a widely recognized explanation of how chemical reactions occur. It proposes that a reaction can occur only when the reactant molecules collide with sufficient force to cause the rearrangement of the atoms. For a reaction to occur, two or more reactant molecules must collide with each other. The probability of a reaction occurring is directly proportional to the number of collisions between the reactants. In the absence of collisions, the reaction rate is zero. Therefore, the rate of a reaction is proportional to the frequency and energy of the reactant molecule collisions.

Why is it essential for the reactants to have sufficient energy?

The collision theory also proposes that collisions between reactants must have sufficient energy to cause the reaction to proceed. The energy necessary to break bonds is known as the activation energy. It is the minimum energy required to initiate a reaction by the collision of the reactants. Only reactants with an energy equal to or greater than the activation energy can undergo the reaction. When the energy of the reactant molecules is insufficient to overcome the activation energy, no reaction occurs. Therefore, for a reaction to occur, reactants must collide with sufficient energy to overcome the activation energy barrier.

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Given that the brass bar and the aluminum bar are 2m and 1m respectively, at the temperature  50.7 °C thermal expansion will happen.

The change in length of a material / can be calculated like this

Expansion of aluminum ⇒ \(\triangle L_A = a_{A }\ L_{A} \triangle T\)

Expansion of brass ⇒ \(\triangle L_B = a_{B }\ L_{B} \triangle T\)

The coefficient of thermal expansion for aluminum is (\(a_A\)= 23 × 10⁻⁶ k⁻¹); for brass (\(a_B\) = 19 × 10⁻⁶k⁻¹).

ΔT = \(\triangle T = \frac{\triangle L_{A} + \triangle L_{B}}{a_{A} L_{A} + a_{B} L_{B}}\)

\(\frac{1.87 * 10^{-3}}{23 * 10^{-6} k^{-1} * 1 + 19 * 10^{-6} k^{-1} * 2}\)

= \(\frac{0.00187}{0.000023+ 0.000038}\)

= 30.66°C

T - 20.0°C = 30.7°C

T = 30.7°C + 20.0°C

T = 50.7

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Answer:

amounts

Explanation:

every surface has different amounts of friction

hope this helps :) plz brainliest?

Answer:

Amounts of frictions

Explanation:

take for example a football player it is harder to push a  sled

Answer:

???

Explanation:

What specifically are you asking about

Answer:

no

Explanation:

because , not all the time the buyers can understand the scientific meaning

When the fighter plane opens the fire, its momentum will be in backward direction and its speed decreases.When pursued plan opens fire in backward direction.then the momentum of plane will be in forward direction and its speed increases.

The solution for the given capacitance is  0.5 .

If the charge is maintained constant, the capacitance will only decrease as the potential increases.The equation states that when the potential difference is smaller, capacitance is larger.

Uc = \(0.5 * C * V^2,C\) = Capacitance,V = Potential,Then\(,C1 = 2C2,V2 = 2V1\),Then \((Uc)1/(Uc)2 = (0.5 * C1 * V1^2) / (0.5 * C2 * V2^2) = 2/4 = 0.5.\)

What distinguishes capacitance from potential?

Capacitance measures the capacity to store charge, whereas electric potential assesses the capability to do work on a charge.Coulomb / Voltage (C/V), which represents the quantity of charge existing per applied voltage, is the measurement unit for capacitance.

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Answer:

Short answer, because copper wire does not have high resistance.

Explanation:

Answer:

Explanation:

Answer:

3.33 m/s west

Explanation:

East is the positive direction.

400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v

-4000kgm/s=1200kg*v

v=-3.33

400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.

Collision, which is also known as impact, is the abrupt, powerful coming together in close proximity of two bodies, such as two pool cues, a golf club and a ball, a hammer and a nail, two railroad cars when linked, or a falling object and a floor.

Two factors—the force and the amount of time the items are in contact—affect the outcome of impact in addition to the characteristics of the two objects' materials.

A hard steel ball dropped on a steel plate will typically rebound to almost the same location from whence it was dropped, while a putty or lead ball would not.

Therefore, 400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.

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The impulse of the net force on the ball during its collision with the wall is 20Ns.

The term "impulse" in physics refers to or measures the effect of a force acting gradually to change the velocity of an item. The letter J stands for it and it is frequently expressed in terms of Newton seconds or kilograms per second.

It's common to define impulse as the average net force acting on an object during a predetermined period of time. The following is the given equation for impulse:

J = F⋅Δt

Please take note that we consider force to be constant.

Like force, impulse is a vector quantity that also has a direction.

Impulse=m× final velocity-(-m× initial velocity)

Impulse=0.5×(20+20)

Impulse=20Ns

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Given:

The mass of the ball is

The initial height of the ball is

The initial speed of the ball is

To find:

the impact speed of the ball when it strikes the ground

Explanation:

The initial potential energy of the ball is

The initial kinetic energy is

The final energy of the ball is fully kinetic energy. Let the final impact speed of the ball is

We can write, using the energy conservation principle that

Hence, the final impact speed of the ball is 46.1 m/s.

The heating-cooling curve shows the changes that occur when heat is added to or removed from a sample of matter at a constant rate. This curve helps to visualize the temperature changes that take place during the heating or cooling process.

A heating-cooling curve, also known as a temperature-time graph, depicts the changes in temperature that occur when heat is added to or removed from a sample of matter at a constant rate. The curve typically shows the relationship between temperature (usually on the y-axis) and time (usually on the x-axis).

During the heating phase of the curve, the temperature of the sample increases steadily as heat is added. The substance undergoes a phase transition, such as melting or boiling, at specific temperature points. During these transitions, the temperature remains constant even though heat is still being added. Once the phase transition is complete, the temperature continues to rise until the desired final temperature is reached.

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The topic of protecting endangered species has different points of view depending on the perspectives of different people. For conservationists and animal rights activists, protecting endangered species is a crucial issue. They argue that these species are vital to the ecosystem and their extinction will have irreversible effects.

The topic of protecting endangered species has different points of view depending on the perspectives of different people. For conservationists and animal rights activists, protecting endangered species is a crucial issue. They argue that these species are vital to the ecosystem and their extinction will have irreversible effects.

According to them, humans should take measures to protect these species by creating and enforcing laws that prohibit hunting, poaching, and habitat destruction.

Moreover, they argue that conservation efforts should be supported to help species recover and avoid becoming extinct. On the other hand, there are people who hold a different view about protecting endangered species.

Some individuals argue that the protection of these species is not a priority and that humans should not interfere with the natural order of things.

Others think that the focus should be on humans and their needs instead of protecting animal species. In their view, conservation efforts and laws for endangered species take away from people’s rights to use natural resources, such as land and water.

They argue that the conservation laws restrict human activities such as hunting and fishing and that they should not be enforced as they take away individual freedoms. My personal view is that protecting endangered species should be a priority for everyone.

The extinction of species is a critical issue that needs to be addressed as soon as possible. Extinction occurs naturally, but human actions have accelerated it over the years.

Many species have gone extinct due to habitat destruction, poaching, and hunting. Protecting these species not only helps to maintain the balance of the ecosystem, but it also has an economic impact. Some of these species have medicinal properties and are also important sources of food.

Therefore, preserving them is beneficial to humans, and not just the animals. I believe that conservation efforts should be supported and laws that protect endangered species should be enforced. However, people's needs should also be taken into account. Conservation should be balanced with the needs of humans.

There should be a compromise between conservation efforts and the use of natural resources by humans. Protecting endangered species is a collective responsibility, and it is essential to address it before it is too late.

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The ball's moment of inertia around the circle's centre is 1.14 kg/m². 0.0195 Nm of torque is required to maintain the ball's rotational angular velocity.

How come the SI unit of work is While both appear to have the same formula, the difference between the Joule and the SI unit of Moment of force (torque) is that the former includes a perpendicular distance while the latter just includes a distance. The joule is the SI unit for measuring work or energy.

I = mr²

where m is the mass of the ball and r is the radius of the circle. Substituting the given values, we get:

I = (0.65 kg) × (1.3 m)² = 1.14 kg·m²

τ = Fr

where F is the force exerted on the ball by air resistance and r is the radius of the circle. Substituting the given values, we get:

τ = (0.015 N) × (1.3 m) = 0.0195 N·m

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When two waves with different amplitudes and the same frequency are in phase, they undergo constructive interference, resulting in a wave with an increased amplitude.

When two waves of the same frequency are in phase, it means that their crests and troughs align perfectly, creating a combined wave. The amplitude of a wave represents its maximum displacement from the equilibrium position.

In constructive interference, the crests of the two waves align, leading to an increase in amplitude. The wave with the larger amplitude adds to the wave with the smaller amplitude, resulting in a new wave with a larger overall amplitude.

Constructive interference occurs because the peaks of the two waves reinforce each other, leading to an additive effect. The individual displacements of the particles in the medium are added together, resulting in an increased displacement.

This phenomenon is commonly observed in various situations, such as when two loudspeakers emit sound waves with the same frequency and are perfectly synchronized. The waves combine, resulting in a louder sound due to the constructive interference of their amplitudes.

In conclusion, when two waves with different amplitudes and the same frequency are in phase, they undergo constructive interference, resulting in a wave with an increased amplitude.

This phenomenon can be observed in various contexts and is a fundamental principle in understanding wave behavior.

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Answer:

iron

Explanation:

According to the given statement, the coefficient of friction between the block and the surface is approximately 0.000772.

The coefficient of friction is a measure of the interaction between two surfaces in contact. It represents the amount of resistance or friction between the surfaces. In the given problem, we need to find the coefficient of friction between the block and the surface.

To find the coefficient of friction, we can use the equation:

μ = (k * x) / (m * g)

where:
- μ is the coefficient of friction
- k is the stiffness constant of the spring
- x is the distance the spring is compressed
- m is the mass of the block
- g is the acceleration due to gravity (approximately 9.8 m/s²)

Given values:
- k = 500.0 N/m
- x = 5.0 cm = 0.05 m
- m = 3.3 kg

First, let's convert the distance x to meters by dividing it by 100:
x = 0.05 m

Now, we can substitute the given values into the equation:

μ = (500.0 N/m * 0.05 m) / (3.3 kg * 9.8 m/s²)

Calculating this expression:

μ = 0.025 / 32.34

μ ≈ 0.000772

Therefore, the coefficient of friction between the block and the surface is approximately 0.000772.

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Explanation:

yup, it's D following Newton's third law of motion

Three-dimensional shape the presence of suggests that an object has weight and gravity, while the absence of it suggests lightness or airiness.

A solid figure, object, or shape with three dimensions—length, breadth, and height—is known as a three-dimensional shape in geometry. Three-dimensional shapes have height, which is equivalent to thickness or depth, unlike two-dimensional shapes. These objects are sometimes referred to as 3-D forms because three dimensions can also be written as 3-D. Every 3-D shape takes up space, which is quantified by volume. For instance, The fundamental 3-dimensional shapes we encounter every day include a cube, rectangular prism, sphere, cone, and cylinder. We can see 3-D shapes all around us. A square prism can be seen in a book and a box, a cube in a Rubik's Cube and a die, etc.

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Not charged - balloon A

Positively charged - balloon C

Negatively charged - balloon B and D.

Charge is the property of an object which attracts or repels unlike and like charges respectively.

For balloon A, positive charges are equal to the negative charges. So, it is neutral or having no charge.

For balloon B and D, negative charges are greater than the positive charges. So, balloons are negatively charged.

For balloon C, positive charges are greater than the negative charges. So, balloons are positively charged.

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The speed of the water at the lower level is 2.5 m/s. As we can see, the decrease in speed is due to the increase in cross-sectional area of the pipe, which allows the water to flow more slowly.

To solve this problem, we can use the principle of conservation of mass, which states that the mass of a fluid flowing through a pipe must remain constant. This means that the product of the cross-sectional area and the speed of the water must be constant throughout the pipe.
Let's denote the speed of the water at the lower level as v2. We can use the formula for the conservation of mass to find v2:
A1v1 = A2v2
Where A1 and v1 are the cross-sectional area and speed of the water at the higher level, and A2 is the cross-sectional area at the lower level.
Substituting the given values, we get:
(4.0 cm^2)(5.0 m/s) = (8.0 cm^2)(v2)
Simplifying, we get:
v2 = (4.0 cm^2)(5.0 m/s) / (8.0 cm^2) = 2.5 m/s
Therefore, the speed of the water at the lower level is 2.5 m/s. As we can see, the decrease in speed is due to the increase in cross-sectional area of the pipe, which allows the water to flow more slowly.

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Answer:

coins

Explanation:

A Coin sliding On an table experiences a friction force, if you give it some speed and let go it will stop.

Option B is the correct answer. Bipolar outflows are often observed in various astronomical phenomena, such as young stellar objects, planetary nebulae, and active galactic nuclei.

These outflows are characterized by the ejection of material in two opposite directions along a common axis. They typically originate from a central source, such as a protostar or an active galactic nucleus, and exhibit a symmetric structure with lobes extending in opposite directions.

Bipolar outflows play a crucial role in the process of star formation and the evolution of galaxies. They are thought to be driven by energetic processes, such as accretion disks, jets, or the interaction between stellar winds and the surrounding medium. These outflows help transport angular momentum, remove excess mass, and influence the surrounding environment, shaping the structure and dynamics of the systems in which they occur.

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15 HP at 240 V is the maximum size of a three-phase, 240-volt motor that can be controlled using a size 2 NEMA contactor

This is further explained below.

Generally, Size 2 NEMA contactors can only handle three-phase, 240-volt motors up to 15 horsepower at 240 volts.

In conclusion, Contactors and motor starters produced by NEMA (National Electrical Manufacturers Association) are graded according to their sizes. These sizes are categorized according to the current and power ratings that they carry.

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Answer:

False.

Explanation:

Behavior modification is a therapeutic process that is focused on changing any undesirable negative behavior in an individual through the use of positive or negative consequence and biofeedback.

This simply means that, behavior modification typically involves the process in which a desired behavior is reinforced while withholding reinforcement for any undesired behaviors.

Behavior modification is typically based on operant conditioning principles, through negative or positive reinforcement, undesirable behaviors developed by an individual are mainly replaced with more desirable ones.

Hence, behavior modification can be used to correct human behaviors or disorders such as enuresis (bed-wetting), Obsessive-Compulsive Disorder (OCD), generalized anxiety disorder, Attention-Deficit/Hyperactivity Disorder (ADHD), phobias, etc.

However, behaviors can still come back or be exhibited by an individual even if they have been extinguished through operant conditioning.

Operant conditioning can be defined as an associative learning process which involves reinforcing the strength of a behavior.

Answer:

Flase

Explanation:

edge2021

Explanation:

kinematics is just the focus on motion of an object rather than other factors such as what caused it. Seeing and studying how a apple moves without studying what force pushed the aple in the first place.

The substitution method is a quick and easy way to algebraically solve a set of linear equations and determine the variables' solutions.

Thus, According to what the name implies, this method entails determining the value of the x-variable in terms of the y-variable from the first equation and then substituting or replacing the value of the x-variable in the second equation.

One of the algebraic techniques for solving simultaneous linear equations is the substitution approach. It entails changing any variable's value from one equation to the other by substituting it in.

The cross multiplication method and the elimination method are the other two algebraic strategies for resolving linear equations and variables.

Thus, The substitution method is a quick and easy way to algebraically solve a set of linear equations and determine the variables' solutions.

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