6) what is ararge of speed​

the actions is a 20kg box on a table and gravity

If a  20 kg box sits on a table, then the action - reaction force pairs involved are 1960 Newtons of the weight of the box acting on the table and in reaction 1960 Newton force that is exerted by the table on the box.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

F = ma

where F represents the force applied

m is the mass of the object and a is the acceleration of the object.

The action-reaction force pairs involved in the case of a 20 kg box resting on a table are 1960 Newtons of force from the box's weight acting on the table and 1960 Newtons of force from the table acting on the box.

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Answer:

The reason why the rocks are more younger than Eart itself is because they come from processes like plate tectonics, volcanoes, and erosions that made up Earth's surface.

Answer:

The lack of impact craters and the age of most rocks on Earth in comparison to other bodies in the solar system can be attributed to processes such as volcanism, plate tectonics, and erosion that have reshaped Earth's surface, and this is why most of Earth's rocks are much younger than the Earth itself.

Answer:

A. Capitalist economy

Explanation:

The United States is a capitalist economy. Hope this helps, thank you !!

The total distance traveled by the in-line skater is 33.75 metres.

The total distance will be calculated by the sum of distance due to acceleration and distance due to constant speed. Converting the above mentioned formula in mathematical expression to be used:

d = (v+u/2)×t + v×t

Keep the values in formula to find the total distance.

d = (5+0/2)×4.5 + 5×4.5

Performing addition and multiplication on Right Hand Side of the equation

d = 2.5×4.5 + 22.5

Performing only multiplication on Right Hand Side of the equation

d = 11.25 + 22.5

Performing only addition on Right Hand Side of the equation

d = 33.75 metres

Thus, the skater traveled 33.75 metres.

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The initial height of a pendulum bob can be determined based on the speed of the bob at the bottom of the swing.

At the bottom of the swing, the pendulum bob possesses only kinetic energy. The relationship between kinetic energy (KE) and potential energy (PE) can be used to find the initial height. Since the bob is released from rest, it has no initial kinetic energy, so all its initial energy is potential energy. At the bottom of the swing, all the potential energy is converted to kinetic energy.

Equating the initial potential energy to the final kinetic energy, we can solve for the initial height. Using the equation PE = mgh, where m is the mass of the bob, g is the acceleration due to gravity, and h is the initial height, we can rearrange the equation to find h = KE/(mg). Substituting the given values, the initial height of the bob is approximately 1.99 meters.

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The modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations.

While marching, the natural frequency of the vibrations of marching soldiers matched up with the resonant frequency of the bridge. This resulted in the collapsing of the bridge in seconds.

Because of the disaster of the Tacoma Narrows Bridge, the bridge was strengthened by adding trusses as well as openings below road decks so as to decrease vibrations caused by running vehicles on the bridge.

Thus, the modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations

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The new  time period of the system is 8.77 sec. If she stands up.

calculation

T = 2π√(L/g)

l = g*(8.85/2π)^2

new length = l -0.35= 8.85-0.35

T = 8.77 sec

Term (T) is the amount of time an oscillating body takes to repeat itself, and Frequency (f or ν) is the variety of instances it repeats in one 2d or unit time. in case you degree time in s (seconds) then frequency is measured in Hz (cycles or durations in keeping with second.

center of mass:

The centroid of a mass distribution in space is the unique point where the weighted relative positions of the distribution masses sum to zero. This is the point where force can be applied to produce linear acceleration without angular acceleration.

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Answer:

Y -- THROUGH THE FOCAL POINT

The volume of the sprinkler for the given water supply is V1 = 0.32m/s, by using Bernoulli's equation.

According to Bernoulli's principle of fluid dynamics, a fluid's speed increases at the same time as its static pressure or potential energy decreases. The Bernoulli equation is regarded as the definition of energy conservation for flowing fluids. This is thought to be the qualitative behaviour that reduces pressure in high-velocity zones. Also, referred to as the Bernoulli effect.

Calculations:

Using continuity equation, Bernoulli's equation.

A1×V1 = A2×V2

Where,

A1 = area of the supply pipe

V1 = volume of supply pipe

A2 = area of sprinkler

V2 = volume of sprinkler

Given,

Diameter of supply pipe = 2.5cm therefore radius = 1.25cm.

Diameter of sprinkler = 0.5cm therefore radius = 0.25cm.

V1 = (A2×V2) /A1

V1 = (π \(r_{2}\)²× V2) / (π \(r_{1}\)²)

V1 = {π (0.25) ² × 8} / { π (1.25) ²}

V1 = 0.32m/s.

Hence, the volume of the sprinkler for the given water supply is V1 = 0.32m/s, by using Bernoulli's equation.

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Urban building energy modeling (UBEM) tools are essential for urban planners, architects, and policymakers to assess energy efficiency and design sustainable buildings. These bottom-up physics-based approaches simulate individual components and systems, providing detailed insights into energy usage and identifying opportunities for improvement. By evaluating design choices, retrofit strategies, and energy conservation measures, UBEM tools promote sustainable urban development and reduce energy consumption and greenhouse gas emissions.

"Urban building energy modeling (UBEM) tools: A state-of-the-art review of bottom-up physics-based approaches" is a comprehensive analysis of the latest techniques used to model and analyze energy consumption in urban buildings. These tools are designed to provide a detailed understanding of how energy is used within buildings and can help identify opportunities for energy efficiency improvements.

UBEM tools adopt a bottom-up approach, which means they consider individual components and systems within a building and simulate their energy consumption. This includes elements such as lighting, heating, cooling, ventilation, and appliances. By analyzing these components, UBEM tools can accurately estimate the total energy consumption of a building.

One example of a bottom-up physics-based approach is the EnergyPlus software. EnergyPlus is a simulation program that models the energy performance of buildings by considering various factors such as building materials, occupancy patterns, and weather conditions. It uses detailed physics-based algorithms to simulate the energy flows within a building, providing valuable insights into energy usage and identifying areas for optimization.

UBEM tools are essential for urban planners, architects, and policymakers to assess the energy efficiency of existing buildings and to design sustainable, energy-efficient buildings. By using these tools, stakeholders can evaluate the impact of different design choices, retrofit strategies, and energy conservation measures. This can ultimately lead to the development of more energy-efficient cities, reducing energy consumption and greenhouse gas emissions.

In summary, UBEM tools are powerful software applications that employ a bottom-up physics-based approach to model and analyze the energy consumption of urban buildings. They provide detailed insights into the energy flows within buildings and help identify opportunities for energy efficiency improvements. These tools play a crucial role in promoting sustainable and energy-efficient urban development.

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answer

the answer is fact.

reason:

definition of 1 newton is the force required to accelerate 1 kilogram of mass at a rate of 1 meter per second squared 1 m/s^2 this means that if a force of 1 N is applied to an object with a mass of 1 kg it will accelerate at a rate of 1 m/s^2 the unit is derived from fundamental units in the SI (system international) system, which is the international standard for measuring physical quantities.

Answer:

True

Explanation:

The average kinetic energy is the measure of how freely the molecules of a substance moves relative to the other molecules within the substance. Gas and liquids are together termed fluids,  but the molecules of a gas naturally has more more average kinetic energy that that of a liquid, if they are kept at the same temperature. This explains why gases are easy to expand, and have to be confined by a container. So the particles of a gas has more kinetic energy that that of a liquid even if they are kept at the same temperature.

Answer:

Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Explanation:

Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.

Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.

This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.

Answer:

first one is for the assignment second is for the quiz

Explanation:

Assignment - C.

Quiz - D.

Answer:

9654.34 m

Explanation:

from conservation of momentum

\($$\begin{aligned}30 \times 250 &=-10 \times 120+20 \times V \\20 V &=30 \times 250+10 * 120 \\V &=\frac{30 \times 250+10 \times 120}{20}=435 \mathrm{~m} / \mathrm{s}\end{aligned}$$\)

And from Conservation of Energy

\(\frac{1}{2} m v^{2}=m g h\\h=\frac{v^{2}}{2 g}\\h=\frac{(435(m/s))^{2}}{2 \times 9.8(m/s^{2} )}\\h=9654.34 (m)\)

Answer:

For the bird moving in a straight line, the kinetic energy is one-half the product of the mass and the square of the speed: Ek=12mu2.

The uncollided flux density at the outer surface of the tank nearest the source is Ψ• = 3.4 x 10^4 MeV/cm^2.s

In this formula, C represents the source's activity at that precise moment, and 24rCE= is the energy fluence.

We must ascertain what level of activity passes through the shielding since it will diminish when the gamma rays pass through the water and iron.

Using 1.25 MeV as the average 60Co energy will make things simpler. With regard to water and iron, the attenuation coefficients for 1.25 MeV  is the energy fluence are 0.06 cm2/g and 0.058 cm2/g, respectively. first figuring out the intensity, then the iron

I =  1 x 10^-3 x 3.3 x 10^10 x e^(-0.06x1.1) x e^-0.058x7.861

I = 2.6x 10^7 Bq

That is what the cylinder is producing. Using a total radius of 11 cm to calculate the uncollided flux density energy fluence

Ψ• = CE/4πr^2 = 2.6 x 10^7 x 2 x 1.25/4π x 11^2

Ψ• = 3.4 x 10^4 MeV/cm^2.s

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The acceleration of the particle is constant \((a=9.8 m/sec^2)\), and it is vertically downward. Therefore, the correct option is diagram no 4.

In the case of a projectile launched into the air, the acceleration acts vertically and is influenced by gravity.

Let's analyze the three points along the path of the projectile:

1. On its way up: At this point, the projectile is moving upwards, and gravity is acting in the downward direction. Therefore, the acceleration of the projectile at this point is directed downward to oppose the upward motion and eventually bring the projectile to a stop.

2. At the top: The projectile reaches its maximum height and momentarily comes to a stop before starting to fall back down. At this point, the acceleration is solely due to gravity, and it acts vertically downward. The acceleration at the top of the projectile's path is directed downward.

3. On its way down: The projectile is now moving downward, and gravity continues to act in the downward direction. The acceleration at this point is again directed downward, assisting the downward motion of the projectile.

Considering these factors, the drawing that correctly represents the acceleration of the projectile at these three points should show the acceleration vector pointing vertically downward in all three positions.

This represents the consistent influence of gravity on the projectile throughout its motion.

Therefore, the correct option is diagram no 4. The acceleration of the particle is constant \((a=9.8 m/sec^2)\), and it is vertically downward.

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✔ First calculating the speed :

V = d(in m)/t(in s)

✔ You now know the average car's speed, is time it takes to stop it completely, so you can calculate its acceleration :

a = V/t

Among the given options, cultural differences are most likely to be the centrifugal force within the EU in the future. The EU is a political and economic union of 27 member states, and cultural differences among its member states have always been present.

With the increasing number of immigrants from different parts of the world, the cultural differences among EU member states are becoming more prominent. Each member state has its unique language, history, customs, and traditions, which can create misunderstandings and conflicts among the member states.
The EU aims to promote unity and solidarity among its member states, but cultural differences can lead to a lack of understanding and trust between them. The EU's diverse cultural heritage is both a strength and a challenge for the union. The EU needs to find a way to respect the cultural diversity of its member states while maintaining its unity.
However, the cultural differences among the member states can still cause tensions and conflicts in the future. Therefore, it is crucial for the EU to continue to foster cultural awareness and understanding among its member states to maintain the union's cohesion and stability.

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complete question:

Which of these is most likely to be a centrifugal force within the EU in the future?

a. trade barriers

b. closed borders

c. pollution problems

d. cultural differences

To determine the normal force (Nc) that the crate exerts on the wedge when the system is at rest, more specific information about the system is needed. Without additional details about the forces acting on the crate and the wedge, it is not possible to calculate the normal force accurately.

The normal force is the force exerted by a surface perpendicular to the contact surface. In the case of a crate resting on a wedge, the normal force is the force exerted by the crate on the wedge in a direction perpendicular to their contact surface. The value of the normal force depends on various factors, including the weight of the crate, the angle of the wedge, and the presence of any other external forces.

To calculate the normal force accurately, we need to consider the forces acting on the crate and the wedge, such as gravitational forces and any external forces applied. Without this information, it is not possible to determine the normal force (Nc) accurately. Therefore, more specific details about the system, including the forces involved, are required to calculate the normal force in this particular .

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Mutation provides the raw material for evolution because it can create new alleles, which are alternative forms of the same gene.

A mutation is a variation or change that occurs spontaneously in the sequence of the genes that make up the deoxyribonucleic acid (DNA).

Mutations can occur at three different levels:

In biology, a gene is a unit composed of a chain of deoxyribonucleic acid (DNA) that contains the necessary information to transfer hereditary traits from one generation to the next.

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Answer:

Which of the following is the best example of a good hypothesis?

B. A cheetah can run faster than a tiger This Is A good Hypothesis Because You Can Test this With a Experiment

xXxAnimexXx

Have a great day!

Answer:

B. A cheetah can run faster than a tiger.

The cause of electric current in a wire is that there is electron flow due to electrical attraction and repulsion.

What is Electric current?

The rate of flow of electric charge through a point is known as electric current. The electric current is nothing but the flow of electrons in general.

Consider a space, when electrons of charge (e) is flowing through the space in a given time interval t. Then,

I = e/t

here,

I is the electric current.

Moreover, there is a flow of electrons in a wire due to a potential difference existing at the circuit. Due to that, electrons always flow from high electric potential to low electric potential.

Thus, we can conclude that the cause of electric current in a wire is that there is electron flow due to electrical attraction and repulsion.

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Displacement is equal to ~

See the attachment for solution ~

Answer:

It is 24000meter per second

To determine the size of the magnetic force on the wire, we need to use the formula F = BIL, where F is the magnetic force, B is the magnetic field strength, I is the current in the wire, and L is the length of the wire.

Unfortunately, the current (I) and the length (L) of the wire are not provided in your question.

Please provide these values in order to calculate the magnetic force.

The magnetic force on the wire can be calculated using the formula F = BIL, but the values for current and length of the wire are required to determine the size of the force.

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During the phase transition from liquid to gas, the temperature of the object remains constant despite continuous heating. The energy supplied to the object is used to break the intermolecular forces holding the liquid molecules together rather than increasing the temperature.

During the phase transition from liquid to gas, the temperature of the object remains constant at the boiling point of the substance. This phenomenon is known as the latent heat of vaporization. As heat is supplied to the liquid, the energy is used to break the intermolecular forces between the molecules, allowing them to overcome the attractive forces and transition into the gas phase.

While the energy is being absorbed by the liquid to undergo the phase transition, the temperature does not increase. Instead, it remains constant until the entire substance has transitioned to the gas phase. This is because the energy supplied is utilized in the process of changing the state of the substance rather than increasing the kinetic energy of the individual molecules, which would result in a temperature increase.

Once the phase transition is complete, any additional energy supplied will result in an increase in temperature as the gas molecules gain kinetic energy. Thus, the phase transition from liquid to gas involves a constant temperature and a transfer of energy to break intermolecular forces rather than a change in the object's temperature.

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An object's centre of mass must be surrounded by an equal amount of mass on both sides. It is untrue.

The centre of mass of an item typically, but not always, sits within the thing itself. For instance, a ball's centre of mass is located in its exact centre, while a book's centre of mass is located in its middle.

When two objects of equivalent mass and speed approach one another, they stay together. After staying together, the two surfaces come to rest while retaining motion but losing kinetic energy. several of the energy of motion gets converted to thermal energy, or heat.

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Answer:

Okay I might be wrong and sorry if i am either its 12 or 0.402

Explanation:

* I recommend the second one cause its more logical

Be aware I might be wrong