what is the necessary condition for the conservation of angular momentum

Answer:(D.)

Explanation:

Answer:

(a)  v = 0 m/s

(b)  v = 6 m/s

(c)  6 m

(d)  a = 0 m/s²

(e)  a = 0.75 m/s²

Explanation:

A velocity-time graph shows the velocity (speed) and direction an object travels over a specific period of time.

A horizontal line means constant velocity.

When v = 0 m/s, the object is at rest.

Acceleration is the slope of the line. (A positive slope is acceleration, and a negative slope is deceleration).

Displacement (distance traveled) is the area under the graph.

Part (a)

The object's initial velocity is when t = 0 s.

Therefore, from inspection of the graph, the initial velocity is:

Part (b)

The object's final velocity is when t = 8 s.

Therefore, from inspection of the graph, the final velocity is:

Part (c)

To calculate the displacement of the object from t = 0 s to t = 2 s, find the area under the graph between those times.

The area is a triangle with base 2 and height 3.  Therefore, using the area of a triangle formula:

Part (d)

The line between t = 2 s and t = 4 s is horizontal.  Therefore, the velocity between these times is constant and so the acceleration of the object is zero:

Part (e)

To calculate the acceleration of the object from t = 4 s to t = 8 s, find the slope of the line between these two points:

\(\implies \textsf{slope}=\dfrac{\textsf{change in $y$}}{\textsf{change in $x$}}=\sf \dfrac{6-3}{8-4}=\dfrac{3}{4}=0.75\)

Therefore, the acceleration of the object from t = 4 s to t = 8 s is:

Answer:

a chemical reaction where electrons mix.

Explanation:

A nuclear reaction is when atomic nuclei combine, forming a new chemical element

A chemical reaction occurs when electrons from the last layer of atoms mix, forming molecules that have the same chemical elements as the reactants.

According to these definitions

           C + 2 S → CS2

in a chemical reaction where electrons mix.

Answer:

This is a chemical reaction, because only the electrons were rearranged.

Answer:

50 kmph

Explanation:

300 / 6 = 50

Answer:

1/4

Explanation:

If the distance between two charges is doubled, the attraction of repulsion between the two becomes weaker, and decreases to 1/4 of the original value.

Answer:

8

Explanation:

All noble gasses have 8 electrons in their outer shell

From the core concept introduced by Al-Haytham, modern cameras are created.

To find the answer, we have to know about the Camera Obscura.

Thus, we can conclude that, from the core concept introduced by Al-Haytham, modern cameras are created.

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Scrum teams take an incremental, iterative approach to their work in order to create usable prototypes of their products or other desired results as soon as possible.

The scrum team should use the following strategy to create worthwhile improvements: Since the scrum team employs an iterative and gradual method of operation, they must swiftly find solutions to issues and deliver effective product iterations or other desired outcomes. Every Sprint, the entire Scrum Team is in charge of creating a valuable, useful increment. The developers, the product owner, and the scrum master are the three distinct accountabilities set forth by Scrum for the Scrum Team. Whether or whether an increment is shipped to consumers, it must be released at the end of each Sprint. Each increment has to be complete, useable, and adhere to the scrum team's quality criteria.

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Answer:

Según la actitud del hablante las oraciones se clasifican en enunciativas, interrogativas, etc. ... adverbios o expresiones que complementan a toda la oración (COr): ojalá, quizá.

Explanation:

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Answer:

B

Explanation:

selenium is the right answer.

Answer:

A

Explanation:

The process capability index for the precision machining process is 0.50. Based on this value, the process is capable of meeting the requirements.

The process capability index (Cpk) is a statistical measure that evaluates the ability of a process to consistently produce output within the specified limits. It takes into account the variability of the process, as well as the distance between the process, mean, and specification limits.

To calculate the process capability index, we use the following formula:

Cpk = min[(USL - μ) / (3σ), (μ - LSL) / (3σ)]

Where:

USL = Upper Specification Limit (1.01 mm)

LSL = Lower Specification Limit (0.98 mm)

μ = Mean of the process (1 mm)

σ = Standard deviation of the process (0.001 mm)

Plugging in the values:

Cpk = min[(1.01 - 1) / (3 * 0.001), (1 - 0.98) / (3 * 0.001)]

   = min[0.003, 0.006]

   = 0.003

The process capability index is calculated to be 0.003.

Since the Cpk value is less than 1, the process is considered to have low capability. A Cpk value of 0.50 indicates that the process has a wide variation compared to the specification limits. Therefore, the process is not capable of consistently meeting the requirements specified by the upper and lower limits.

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One of the best defensive driving techniques for windy conditions is driving with both hands on the steering wheel.

When driving in windy conditions, it is essential to take some safety precautions to avoid accidents and maintain control over the vehicle. A vehicle's stability and safety depend on the driver's ability to control it, especially in extreme weather conditions. Driving with both hands on the steering wheel is the most recommended defensive driving technique to stay in control of the vehicle during windy conditions. Besides driving with both hands on the steering wheel, it's essential to maintain a slow and steady speed, pay attention to the wind direction, and stay focused on the road. The strong wind can cause vehicles to drift, sway, or even flip, so it's necessary to keep a safe distance from other vehicles, especially large trucks or buses. When driving on a windy day, it's crucial to remain calm and avoid panic. Sudden movements and reactions can cause the driver to lose control of the vehicle, which could result in a severe accident. Therefore, it's best to stay alert, keep both hands on the steering wheel, and maintain a slow and steady speed to stay safe in windy conditions.

In conclusion, the best defensive driving technique for windy conditions is driving with both hands on the steering wheel, maintaining a slow and steady speed, and keeping a safe distance from other vehicles. Stay focused, stay calm, and stay safe. The answer to the question is: driving with both hands on the steering wheel.

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Answer: 554.9 seconds

Explanation:

345.7/0.623=554.9 seconds

Answer:

15 cm

Explanation:

using the thin lens formula for convex lens

                            \(\frac{1}{f} = \frac{1}{p} + \frac{1}{q}\\ \\where f = focal length \\ p = object distance \\ q = image distance\\\)

 so,

         \(\frac{1}{q} = \frac{1}{f} - \frac{1}{p} \\\\\frac{1}{q} = \frac{1}{10} - \frac{1}{30} \\\frac{1}{q} = \frac{2}{30}\\\frac{1}{q} = \frac{1}{15cm}\)

so,

    q = 15 cm

The given statement " Gauss's Law is derived from the fact that the net flux, Phi_net, through any enclosed surface around any charge distribution is constant regardless of the size of the enclosed surface" is false.

Gauss's Law is not derived from the fact that the net flux through any enclosed surface around any charge distribution is constant regardless of the size of the enclosed surface. Gauss's Law is one of the four fundamental laws of electromagnetism, and it relates the electric field to the charge distribution in a closed surface.

The correct statement is: Gauss's Law is derived from the fact that the total electric flux through a closed surface is proportional to the total charge enclosed by that surface.

Gauss's Law states that the total electric flux through a closed surface is equal to (1/ε₀) times the total charge enclosed by that surface, and it provides a powerful tool for calculating electric fields in symmetric charge distributions using closed surfaces known as Gaussian surfaces.

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a. Just Noticeable Difference (JND) refers to the smallest difference in stimuli that can be detected by a person. It is also known as the difference threshold. Weber's Law states that the JND is proportional to the magnitude of the stimulus.

In simpler terms, the JND is relative to the initial stimulus. For example, if you have a 10 kg weight and you add 1 kg, you will notice the difference. However, if you have a 100 kg weight and you add 1 kg, you may not notice the difference. Weber's Law helps us understand how our perception changes as the magnitude of the stimulus changes.

b. To suggest a discount using the principle of JND, we need to consider the income range and the prices of the pressure cooker. Let's assume the JND for families earning Rs. 10,000 per month is Rs. 200 and for families earning Rs. 15,000 per month is Rs. 300. Based on these values, we can calculate the discounts that would make them notice and be motivated to buy the pressure cooker.

For families earning Rs. 10,000 per month, the JND is Rs. 200. So, if we offer a discount of Rs. 200 on the 3 Litre pressure cooker priced at Rs. 1800, the new price would be Rs. 1600. This discount would be noticeable to them and may motivate them to purchase.

For families earning Rs. 15,000 per month, the JND is Rs. 300. So, if we offer a discount of Rs. 300 on the 5 Litre pressure cooker priced at Rs. 2400, the new price would be Rs. 2100. This discount would be noticeable to them and may encourage them to buy.

The justification for these discounts is that they are based on the JND principle, which ensures that the discounts are noticeable to the target audience. By offering discounts within their perception range, we can attract their attention and motivate them to make a purchase.

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The final temperature when 150 g of hot water at 86°C is poured into a 250-g glass cup at 22°C and comes to thermal equilibrium is approximately 63°C.

To calculate the final temperature, we can use the principle of conservation of energy. The heat lost by the hot water is equal to the heat gained by the cold cup of water. We can use the formula:

Q = m * c * ΔT

where Q is the heat energy gained or lost, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

First, let's calculate the heat lost by the hot water:

Q_hot = m_hot * c_hot * ΔT_hot

Q_hot = 150 g * 4.184 J/(g°C) * (86°C - T_final)

Next, let's calculate the heat gained by the cold cup of water:

Q_cold = m_cold * c_cold * ΔT_cold

Q_cold = 250 g * 0.84 J/(g°C) * (T_final - 22°C)

Since the heat lost by the hot water is equal to the heat gained by the cold cup of water, we can set Q_hot equal to Q_cold and solve for T_final:

150 g * 4.184 J/(g°C) * (86°C - T_final) = 250 g * 0.84 J/(g°C) * (T_final - 22°C)

Solving for T_final, we get T_final = 63°C.

Therefore, the final temperature when the two substances come to thermal equilibrium is approximately 63°C.

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This means that potassium hydroxide is a Compound. Option A.

Water is formed from the chemical combination of hydrogen and oxygen. A water molecule is a chemical bond of two hydrogen atoms and one oxygen atom. Hydrogen polyoxides, also called oxidants oxyhydrogen or explosive gases, are composed only of hydrogen and oxygen atoms, joined only by single bonds, are saturated and acyclic, and have a molecular structure containing no rings or loops increase.

Hydrogen is an element consisting of a group of hydrogen atoms, and oxygen is an element consisting of oxygen atoms. But water is a compound of water molecules. Molecules that make up a compound are made up of different types of atoms, but molecules can also be made up of the same type of atoms. Two hydrogen atoms and one oxygen atom combine to form water. two hydrogen atoms and two oxygen atoms combine to form hydrogen peroxide,

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Example of an elastic product: Smartphone

Explanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer.

Example of an inelastic product: Prescription medication

Explanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded.

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Places, where particles of the medium spread farther apart, are called compressions.

Mechanical waves are classified as longitudinal waves and transverse waves. Some examples of longitudinal waves are sound waves, seismic P-waves, and ultrasound waves. Transverse waves examples include electromagnetic waves and ocean waves. In this article, we will learn what is a longitudinal wave and its characteristics. Longitudinal waves are waves where the displacement of the medium is in the same direction as the direction of the traveling wave. The distance between the centers of two consecutive regions of compression or the rarefaction is defined by wavelength, λ. When the compression and rarefaction regions of two waves coincide with each other, it is known as constructive interference and if the regions of compression and rarefaction do not coincide, it is known as destructive interference.

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The rate at which the current through the 0.35 H coil is changing is approximately 0.771 A/s when a voltage of 0.27 V is induced across the coil.

We will use Faraday's Law of Electromagnetic Induction, which states that the induced voltage (V) across a coil is equal to the product of the rate of change of current (di/dt) and the coil's inductance (L). The formula is:
V = L * (di/dt)
Given the induced voltage (V) of 0.27 V and the coil's inductance (L) of 0.35 H, we can rearrange the formula to find the rate of change of current (di/dt):
di/dt = V / L
Now, plug in the given values:
di/dt = 0.27 V / 0.35 H
di/dt ≈ 0.771 A/s
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Answer:

 θ = 73.6º

Explanation:

To solve this exercise, let's use Newton's second law. Let's set a reference system where the x-axis is parallel to the inclined plane

with trigonometry we can find the components of the weight

           sin θ = Wₓ / W

           cos θ= W_y / W

           Wₓ = W sin θ

           W_ = W cos θ

Y axis  

           N - W_y = 0

           N = W_y

X axis

           Wₓ - fr = m a

            mg cos θ - fr = m a

indicate that friction is zero, fr = 0

            cos θ = a / g

            θ = cos⁻¹  \(\frac{a}{g}\)

let's calculate

            θ = cos⁻¹  \(\frac{2.77}{9.8}\)

            θ = 73.6º

1.5 gram per cubic centimeter

Chewing is an example of mechanical digestion.Mechanical digestion refers to the process by which food is physically broken down into smaller pieces to improve digestion and absorption.

The process begins in the mouth and is carried out by a number of organs such as the tongue, teeth, and stomach. Chemical digestion occurs next, in which enzymes break down food molecules to their essential components, allowing them to be absorbed into the bloodstream and delivered to the cells that need them.

What is an example of mechanical digestion?As stated earlier, mechanical digestion involves the physical breakdown of food into smaller particles. Here are some examples of mechanical digestion:Chewing - Your teeth grind food into smaller pieces, making it easier to digest and absorb.

Your saliva, which contains enzymes that start the chemical digestion process, also softens the food and helps to break down starch into simpler sugars.Grinding - After you swallow, your food moves to the stomach, where it is further broken down by contractions of the stomach muscles.

Mixing - The stomach's muscular walls contract to create churning movements that mix food with gastric juices, resulting in a semi-solid substance known as chyme that can be transported to the small intestine for further digestion and absorption.In conclusion, chewing is an example of mechanical digestion.

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The mass at the other end of bar will be 50g .

what is mass

It is the fundamental property of matter , every single property which exist in this world has mass

Mass never can be 0 .

So , the system is in equilibrium

let mass of the body be m

55×5= m×5.5

m= 5 5 × 5 /. 5.5

m= 5 0g



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137.5 kg mass can be placed 2m away from the other end of the bar to keep the bar horizontally.

To keep the bar horizontal, the right and left side torques must be equal:

\(F_{1} d_{1} =F_{2} d_{2}\)

\(F_{2} =F_{1} \frac{d_{1} }{d_{2} }\)

    \(=(55.9.8)\frac{5}{2}\)

    =1347.5 N.

Convert this force of gravity into mass:

\(F_{2} =m_{2} g,\)

\(m_{2} =\frac{F_{2} }{g}\)

     \(=\frac{1347.5}{9.8}\)

     =137.5 kg.

The answer is 137.5 kg.

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