A wooden box is pushed with 100 N towards North
direction, and from the opposite side another 100 N is
applied towards South direction. What is the net force?

Answer:C car

Explanation:

The body is experiencing negative angular acceleration or angular deceleration.

The temporal rate at which angular velocity changes is known as angular acceleration. The standard unit of measurement is radians per second per second.

The angular acceleration can be determined using the formula:

angular acceleration = (change in angular velocity) / (time taken)

In this case, the change in angular velocity is:

(change in angular velocity) = final angular velocity - initial angular velocity

= (-40 rad/s) - (-20 rad/s)

= -20 rad/s

Assuming that the time taken for this change in angular velocity is not given, we cannot determine the angular acceleration directly using the above formula. However, we can say that the angular acceleration must be negative, as the angular velocity is decreasing (going from -20 rad/s to -40 rad/s). This means that the body is undergoing angular deceleration, or negative angular acceleration.

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Answer:

x = 3.6 10⁷ m

Explanation:

The speed of an electromagnetic wave is constant, in a vacuum its value is    c = 3 10⁸ m / s, this speed decreases when entering a material medium,

         v = c / n

where n is the refractive index, but in this case the refractive index of air is n = 1.00002. The refractive index of a vacuum is n = 1, so we can assume that the change in velocity is negligible.

For the calculation we can use the relations of the uniform motion

        v = x / t

        x = v t

let's calculate

        x = 3 10⁸ 0.12

        x = 3.6 10⁷ m

Explanation:

The relationship among u, v, and f in the context of a lens can be described by the lens formula:

1/v - 1/u = 1/f

where:

- u is the object distance (distance between the object and the optical center of the lens),

- v is the image distance (distance between the image and the optical center of the lens), and

- f is the focal length of the lens.

According to the lens formula, the reciprocal of the image distance subtracted from the reciprocal of the object distance is equal to the reciprocal of the focal length.

The number of electrons that is needed to fill the following sublevels are:

The formula to find this out is:

= 2 x (2 x Level +1)

1s = 0 levels

Number of electrons:

= 2 x (2 x 0 + 1)

= 2 electrons

2s = 0 levels

= 2 x (2 x 0 + 1)

= 2 electrons

2p = 1 level

= 2 x (2 x 1 + 1)

= 6 electrons

3s = 0 levels

= 2 x (2 x 0 + 1)

= 2 electrons

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The completed table using the electron arrangement interactive is attached below. In this table for sublevel 1s, 2s, 2p and 3s electron needed is 2,2,6 and 2 respectively.

The electron arrangement is the way or process to arrange the electrons in an atom. The number of electron  needed per sublevel are expressed in following points.

The image of the table which fill the sublevel is attached below. In this table all the electron is fulfilled with needed electrons.

Thus, the completed table using the electron arrangement interactive is attached below. In this table for sublevel 1s, 2s, 2p and 3s electron needed is 2,2,6 and 2 respectively.

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If an object is moving along a straight line at a constant speed of 20 meters/second, then the object travels 80 meters during the first four seconds.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to find out the distance traveled in the first four seconds when If an object is moving along a straight line at a constant speed of 20 meters/second,

The total distance traveled by the object = speed of the object×time

                                                                    =20 meters/second×4 seconds

                                                                    =80 meters

Thus, the correct answer is option D.

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Answer: is C

Explanation: i hope it helps :)

Answer:b) 30km/h

Explanation: I just had this answer on a test got it right!!thit

There are several types of barrier options, including up-and-out, up-and-in, down-and-out, and down-and-in options. These options add an additional barrier condition that must be met for the option to become active or to be knocked out. The exact number of barrier option types may vary depending on specific variations and combinations. These barrier options provide additional flexibility

Barrier options are a type of exotic option that have a specified barrier level. The barrier level acts as a trigger, determining whether the option is activated or nullified. Barrier options can have different types of barrier conditions, which can be set above or below the underlying asset's price.

The four common types of barrier options are:

Up-and-out option: The option is knocked out if the price of the underlying asset moves above a predetermined barrier level.

Up-and-in option: The option becomes active only if the price of the underlying asset moves above a predetermined barrier level.

Down-and-out option: The option is knocked out if the price of the underlying asset moves below a predetermined barrier level.

Down-and-in option: The option becomes active only if the price of the underlying asset moves below a predetermined barrier level.

These barrier options provide additional flexibility and complexity compared to regular options, as their payoff and activation depend on whether the barrier levels are breached or not.

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The speed of the wave on a string is given by Taylor's formula:

where

F = tension force

μ = linear density = mass per unit length

But also we can say the speed of any wave is given by:

where:

λ = wave length

f = frequency

Plug the second equation in the first one. We get:

Now solve for f:

Lets say wave length is the same on the second case. Since it's the same string μ will also be the same.

See that 340 N = 2 x 170, so we can write:

The angular momentum of the ball that has a mass of 5.2 kg and is swung around a rope with a radius of 0.86 meters at a speed of 1.8 m/s is approximately 7.24 kg m²/s.

We know that angular momentum is the product of an object's rotational inertia and rotational speed or angular velocity. The equation for angular momentum is:L = IωWhere L is angular momentum, I is rotational inertia, and ω is angular velocity. Since the ball is moving in a circular path, we need to use the formula for rotational inertia of a point mass: I = mr², where m is the mass of the ball and r is the radius of the circle.The angular velocity ω can be calculated from the linear speed v using the formula v = rω, which gives ω = v/r. Substituting these values into the equation for angular momentum, we get:L = Iω = (mr²)(v/r) L = 5.2 kg x 0.86 m x 1.8 m/s = 7.24 kg m²/sTherefore, the angular momentum of the ball is approximately 7.24 kg m²/s.

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The energy of the photon is inversely proportional to its wavelength.

Since photons are thought of as point particles, they are said to be physically unsized and unstructured. Since they cannot be divided into smaller parts, they are regarded as elementary particles.

The wavelength of the photon and the size of the absorbing object determine how far away from the photon's line of transmission one must be to interact with or absorb it.

In general, the likelihood of contact or absorption increases with proximity to the line of propagation.

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The given statement 'A permanent test instrument is a device that is installed in a process or at a bench to continually measure and display quantities' is true.

A measuring instrument is a device used to measure a physical amount. Measurement, in the physical sciences, quality control, and engineering, is the process of gathering and contrasting the physical amounts of things that actually happen in the real world. As units, pre-defined standard things and occurrences are used, and the measuring procedure yields a number that connects the subject-matter under investigation to the used unit of measurement. These numerical relationships are attained through the employment of measuring devices and formal test methodologies that specify the device's use.

The instrument error and measurement uncertainty that affect all measuring devices varies in severity. From basic tools like stopwatches and rulers to electron microscopes and particle accelerators, these instruments can be used for various purposes.

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The first moment of the total cross-sectional area taken about the neutral axis must be zero.

A member that resists bending has a neutral axis in its cross-section along which there are no longitudinal stresses or strains. The neutral axis lies at the geometric centroid if the section is symmetric, isotropic, and does not curve before a bend. The neutral axis is not under any strain. Therefore, the neutral axis has no bending moment. Because the neutral axis is not affected by the applied stresses, there is no bending stress. At the neutral axis, no stress is created. The line in the cross-section of a beam where there is neither longitudinal compression nor tensile stress is known as the neutral axis for that beam. The neutral axis is typically regarded in the study of wood beams to be at the centroid of the beam.

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The first moment of the total cross sectional area taken about the neutral axis must be zero.

As with non-composite beams, the neutral axis (NA) is the location where the bending stress is zero. The location of the NA depends on the relative stiffness and size of each of the material sections.

Generally, the NA location is determined relative to the bottom surface of the beam. However, this is not mandatory, and the location can be relative to any location. If the bottom is used, then the NA axis is a distance "h"

The distance h can be determined by recalling that the stresses through the cross section must be in equilibrium.

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Explanation:

Both insects transform during pupa stage

Answer:

1 Watt

Explanation:

P=W/t

P=10/10

P=1 Watt

Answer:

meter

Explanation:

please make me brainllist

A. Oatmeal is a great source of soluble fiber. Soluble fiber is a type of fiber that dissolves in water and forms a gel-like substance in the digestive tract. This gel helps slow down digestion, which can help regulate blood sugar levels, lower cholesterol, and promote a feeling of fullness.

Other good sources of soluble fiber include beans, lentils, peas, barley, fruits such as apples and oranges, and vegetables such as carrots and Brussels sprouts. It is recommended to consume at least 25 grams of fiber per day, with at least 10-15 grams coming from soluble fiber.
A good source of soluble fiber is a type of fiber that dissolves in water and forms a gel-like substance in the digestive tract. This gel helps slow down digestion, which can help regulate blood sugar levels, lower cholesterol, and promote a feeling of fullness. According to the American Heart Association, soluble fiber is beneficial for heart health as it binds to cholesterol in the digestive tract and removes it from the body. It is recommended to consume at least 25 grams of fiber per day, with at least 10-15 grams coming from soluble fiber. Some other good sources of soluble fiber include beans, lentils, peas, barley, fruits such as apples and oranges, and vegetables such as carrots and Brussels sprouts. Consuming foods high in soluble fiber can help improve digestion, promote feelings of fullness, and help maintain a healthy weight. Therefore, including soluble fiber in the diet is crucial.
Source: American Heart Association (https://www.heart.org/en/healthy-living/healthy-eating/eat-smart/nutrition-basics/fiber)

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Answer:

Before coming into any conclusion, first we have to understand radiation and conduction.

Radiation is the type of mode of transmission of thermal energy in which the radiations travels through space or vacuum without heating the intervening medium.

On the other hand, conduction is the mode of transmission of heat from one body to another body which are in contact with each other or hotter part to the colder parts of a body without any transport of material particle.

Heat always flows from a body at higher temperature to a body at a lower temperature in absence of external work done. The reverse is not possible in normal case.

Heat is flowing  from hot body to cold body, and there is no direct contact between the body. It explains correctly the mode of transmission of thermal energy through the process of radiations.

When a particle with kinetic energy enters a region with a potential well, its behavior is influenced by the potential energy in that region.

In this case, the particle has a kinetic energy of 50 eV and encounters a potential well with a depth of 40 eV.

If the particle's kinetic energy is less than the potential well depth, it will experience a change in its wavelength inside the well. As the particle enters the potential well, its kinetic energy decreases and gets converted into potential energy. This leads to a decrease in the particle's momentum and an increase in its wavelength.

Since the potential well depth is greater than the particle's initial kinetic energy, the particle will experience an increase in its wavelength as it enters the well. The exact change in wavelength would depend on the specific details of the potential well and the particle's properties, but in general, the wavelength will increase.

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Answer:

\(workdone = force \times distance \\ = 65000 \times 75 \\ = 4,875,000 \: J\)

The maximum efficiency of the steam engine can be calculated using the formula: Efficiency = (1 - Tc/Th) x 100%. Therefore, the maximum efficiency of this steam engine is 50%, which means that half of the thermal energy received by the engine is used for work, and the other half is exhausted to the condenser.

Where Tc is the temperature of the condenser (250 K) and Th is the temperature of the steam (500 K).
So, Efficiency = (1 - 250/500) x 100% = 50%
To calculate the maximum efficiency of a steam engine, we will use the Carnot efficiency formula, which considers the input and output temperatures.
Step 1: Convert the input and output temperatures to Kelvin, if not already provided.
In this case, the input temperature (hot reservoir) is already given as 500 K, and the output temperature (cold reservoir) is given as 250 K.
Step 2: Apply the Carnot efficiency formula:
Carnot efficiency = 1 - (Tc/Th)
where Tc is the temperature of the cold reservoir, and Th is the temperature of the hot reservoir.
Step 3: Substitute the given values into the formula:
Carnot efficiency = 1 - (250 K / 500 K)
Step 4: Calculate the efficiency:
Carnot efficiency = 1 - (0.5) = 0.5
Step 5: Convert the efficiency to a percentage:
Maximum efficiency = 0.5 * 100% = 50%
So, the maximum efficiency of this steam engine is 50%.

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If the air bags are not in proper operating condition, the warning light will stay on.

It is important to have the air bags checked and repaired by a qualified mechanic to ensure they are functioning properly in the event of an accident. Driving with malfunctioning air bags can be dangerous and increase the risk of injury in a collision.

Some of the common causes of the airbag warning light are:

Faulty sensors: The sensors are devices that monitor various parameters of your car and tell the computer when to inflate the airbags. If the sensors are damaged, malfunctioning, or tripped accidentally, they can trigger the warning light.

Wet airbag module: The airbag module is an electronic device that controls the airbag system. It is usually located under the seat or behind the dashboard. If the module gets wet due to flooding, spills, or moisture, it can cause corrosion or short circuits that can activate the warning light.

Worn out airbag clock springs: The airbag clock springs are spiral wires that connect the driver’s airbag on the steering wheel to the electrical system. They allow the steering wheel to rotate while maintaining contact with the airbag. Over time, these wires can wear out or break and cause a loss of communication between the airbag and the computer.

Deactivated airbag: The airbag can be deactivated due to a fault in the airbag itself or in any of its components, such as the inflator, wiring, or connector. This can happen due to age, wear and tear, impact, or tampering.

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The drag force is the force that opposes the movement of a body through a fluid.

The drag force is the force that opposes the movement of a body through a fluid. This occurs in cases such as when a car is moving through air.

Owing to the fact that drag force tends to slow down vehicles when they move at higher speed, vehicles that are meant for racing are streamlined to reduce the drag force.

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Answer:

Electric potential energy, or Electrostatic potential energy, is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.

Explanation:

Answer:

it is chemical energy

Explanation:

that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy

Answer:

Oh god

i have nooooo idea

the third one is the brightest, the second one is the second brightest, the first one is the second dimmest, and last but not least, the last one is the dimmest.

Explanation:

hope this helps

Answer:

0.72 atm

Explanation:

Given that the atmospheric pressure on a mountain is 550 mmHg.

Where 1 atm is equal to 760 mmHg.

To Convert millimetre mercury (mmHg) into atmospheric pressure units (atm) , divide the magnitude of pressure by 760. That is,

Pressure = 550/760

Pressure = 0.724 atm

Therefore, pressure in atm is 0.72 atm in two significant figures

Porter's Five Forces is a framework used to analyze the competitive intensity and attractiveness of an industry. The five forces are: Threat of New Entrants, Bargaining Power of Suppliers, Bargaining Power of Buyers, Threat of Substitute Products or Services and Intensity of Competitive Rivalry.

Threat of New Entrants: This force considers the ease or difficulty for new competitors to enter an industry. It includes barriers to entry such as high capital requirements, economies of scale, brand loyalty, and government regulations.

Example: The airline industry is known for its high barriers to entry due to the significant capital required to purchase aircraft, establish routes, and secure necessary licenses and permits. Additionally, established airlines often have loyal customer bases and strong brand recognition, making it challenging for new entrants to compete effectively.

Bargaining Power of Suppliers: This force assesses the power suppliers have over the industry in terms of pricing, quality, and availability of inputs. It considers factors such as the concentration of suppliers, uniqueness of their products, and their ability to forward integrate.

Example: In the smartphone industry, major suppliers of components like microchips and display screens hold significant bargaining power. These suppliers provide essential inputs, and their products may have limited alternatives or require specialized manufacturing processes. As a result, smartphone manufacturers must negotiate favorable terms with these suppliers to ensure a reliable supply chain and competitive pricing.

Bargaining Power of Buyers: This force examines the power customers have in influencing prices, demanding better quality or service, and potentially switching to alternative products or suppliers. It considers factors such as buyer concentration, product differentiation, and switching costs.

Example: The retail industry experiences strong buyer power, particularly in highly competitive markets. Customers have access to various options, and their ability to compare prices and products easily through online platforms empowers them to demand competitive pricing, promotions, and high-quality products and services.

Threat of Substitute Products or Services: This force looks at the availability of alternative products or services that can satisfy customer needs. It considers factors such as price-performance trade-offs, switching costs, and customer loyalty.

Example: The rise of streaming services such as Netflix, Amazon Prime Video, and Hulu posed a significant threat to traditional cable and satellite TV providers. These streaming platforms offer a wide range of content at competitive prices, allowing customers to switch from traditional TV services to streaming options, resulting in a decline in subscriber numbers for traditional providers.

Intensity of Competitive Rivalry: This force evaluates the level of competition among existing firms in the industry. It considers factors such as the number and size of competitors, industry growth rate, product differentiation, and exit barriers.

Example: The soft drink industry, dominated by major players like Coca-Cola and PepsiCo, experiences intense competitive rivalry. These companies fiercely compete for market share through advertising campaigns, new product launches, pricing strategies, and distribution channels. The rivalry is further intensified by the high market saturation and the limited scope for differentiation among similar products.

The interconnection of these forces lies in their collective influence on the competitive dynamics and profitability of an industry. Changes in one force can trigger a chain reaction that impacts the others. For instance, a high threat of new entrants may lead to increased competitive rivalry as existing firms strive to defend their market share. Similarly, a strong bargaining power of buyers can limit the pricing power of suppliers and impact their profitability. Understanding these interconnections helps businesses assess the overall attractiveness and competitive landscape of an industry and develop appropriate strategies to thrive within it.

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