I WILL MAKE U BRAINLIEST ! HELP PLS

Signals are digitized during transmissions over wireless networks. The chart lists possible features of digital communication.




Which features are correct?



1 and 2 only



3 and 4 only


1, 2, and 3


2, 3, and 4

Answer:

sorry im english

Explanation:

Answer:

Particles are squeezed together and pushed apart by P waves. Particles slide past each other in a crosswise direction as S waves pass through them.

TO be completely Honest with this, Based of reading the questions and answers it may be D. just off sheer legibility of logic alone, Hope this is not wrong.

The D. critical path is a series of events and activities with no slack time.

It is a path that defines the longest duration required to complete a project. It is significant in the project management methodology as it helps the project manager establish a timeline for the project while also identifying the activities that are most critical to the project's completion. If an activity on the critical path takes longer than anticipated, the whole project will be delayed, and if an activity is completed earlier than expected, then it might not be worth it to continue the project, and the client might not be willing to pay for it.

The critical path analysis allows managers to identify and control the critical factors that can impact a project's success, enabling them to focus on the most important areas and make informed decisions about the project. So the correct answer is D. critical path, is a series of events and activities with no slack time.

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Answer:

Change in internal energy AU = 40 J

Explanation:

Given:

Amount of heat added = 70 J

Work done = 30 J

Find:

Change in internal energy AU

Computation:

The net thermal conductivity into a process less the net work performed by the system represents the shift in internal energy.

Change in internal energy AU = Q - W

Change in internal energy AU = 70 J - 30J

Change in internal energy AU = 40 J

Answer:

B

Explanation:

By 0.27m, the kitchen is farther than the hallway. Because Kim's home's hallway is 4.63 metres long. The distance of her kitchen is 0.0049 kilometres. The distance is same in any velocity.

Distance is measured numerically or sporadically qualitatively. far apart certain things or points are. Distance in physics or common language can refer to a physical length or an assumption based on other factors. Purposes In disciplines that study human behaviour, such the social sciences, qualitative measurements are frequently used. The rate of change in an object's position relative to a frame of reference is called velocity, and it depends on time.

4.9m is equal to 0.0049 km;

the difference is equal to 4.9 - 4.63;

and the difference is equal to 0.27.

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Answer:

Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy

Explanation:

Coal is formed from the fossil fuel that lie deep beneath the earth crust . These fossil fuels are dead remains of living organism that burried beneath the earth crust million of years ago.

Coal is non renewable because if once it gets depleted it will take a very very long time to replenish.

Answer: Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy

Explanation: just did it

(1) sin 40° = n(sin 200⁰).

1. A ray of light traveling from air into crown glass strikes the surface at an angle of 30°.

We can often use Snell's Law to help us find the index of refraction of a refractive medium.

In this question, we're given the following:

Since we know we're solving for the index of refraction of the second medium, isolate \(n_2\) in Snell's Law:

\(\dfrac{n_1}{n_2}=\dfrac{\sin(\theta_2)}{\sin(\theta_1)}\\\\\\\dfrac{n_2}{n_1}=\dfrac{\sin(\theta_1)}{\sin(\theta_2)}\\\\\\n_2=\dfrac{\sin(\theta_1)}{\sin(\theta_2)}*n_1\)

Plug in all the information we know and find \(n_2\):

\(n_2=\dfrac{\sin(40^\circ)}{\sin(29^\circ)}*1.0003\\\\\\n_2\approx1.3263\)

Therefore, the index of refraction of the refractive medium is approximately 1.3263.

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 primary observable effect of the slow precession of Earth's rotational axis is the gradual shift in the positions of the stars in the night sky over long periods of time.

This is because the precession causes the direction in which the Earth's axis points to change over a period of approximately 26,000 years. As a result, the position of the North Celestial Pole, around which the stars appear to rotate, changes over time, causing the positions of the stars to shift as well.

This effect is known as precession of the equinoxes, and it has been observed and documented by astronomers for thousands of years. In detail, this effect is caused by the gravitational pull of the Moon and the Sun on the Earth's equatorial bulge, which causes a slow wobbling of the planet's axis over time.

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Answer: Distance

Explanation:

When driving, it is important for one to always use safety belt and obey traffic rules.

During a collision, it is vital to always adhere to safety belts and also use occupant protection systems in order to help reduce the impact that an be felt during a collision. As you travel downhill, your vehicle needs less power to reach the bottom and your stopping distance increase.

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In other words, the larger the net force acting on an object, the greater its acceleration, and the larger the object's mass, the smaller its acceleration for a given force.

When a weight is placed over a pulley, the net force acting on it is equal to the weight of the object, and the acceleration of the object depends on its mass. However, if the weight over the pulley is not constant, the net force acting on the object changes, which affects its acceleration.

For example, if the weight over the pulley increases, the net force acting on the object also increases, and the object's acceleration increases. Conversely, if the weight over the pulley decreases, the net force acting on the object decreases, and the object's acceleration decreases.

Keeping the weight over the pulley constant ensures that the net force acting on the object remains constant, which allows for accurate and predictable calculations of the object's acceleration. This is especially important in scientific and engineering applications where precise measurements and calculations are necessary.

Therefore, it is important to keep the weight over the pulley constant to ensure that Newton's second law of motion can be applied accurately and consistently.

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South American Leaf Blight (SALB) has not destroyed the rubber plantations in Southeast Asia because: Geographical separation, strict quarantine measures, disease resistant cultivars and early detection.

1. Geographical separation: SALB is a fungal disease that primarily affects rubber trees in South America. Southeast Asia is geographically distant from South America, which helps to prevent the natural spread of the disease to rubber plantations in this region.

2. Strict quarantine measures: Governments and plantations owners in Southeast Asia have implemented strict quarantine measures to prevent the introduction of SALB. These measures include controlling the import of rubber plants and monitoring plant health in the region.

3. Disease-resistant cultivars: Researchers and rubber plantation owners in Southeast Asia have developed and planted disease-resistant rubber tree cultivars, which can better withstand the effects of SALB. This helps to protect the plantations from potential outbreaks of the disease.

4. Monitoring and early detection: Regular monitoring and early detection of any signs of SALB in Southeast Asian rubber plantations allow for quick intervention and management, helping to prevent the disease from spreading and causing widespread damage.

These factors have collectively contributed to the prevention of SALB from destroying rubber plantations in Southeast Asia.

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Answer:

D wind

Explanation:

Heavy winds may cause much  damage to the Earth along with rain and extreme temperature changes.

If a negative charge is moved in the same direction as the electric field lines in some region of space, its potential energy will decrease.

This is because the negative charge is moving towards an area of lower potential energy.

In other words, the negative charge is moving towards an area where there is less electrical potential energy per unit charge.

As the negative charge moves closer to the source of the electric field, its potential energy will continue to decrease.

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Explanation:

1.The parts of the ear include:

External or outer ear, consisting of: Pinna or auricle. This is the outside part of the ear. ...

2.Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.

3.Middle ear (tympanic cavity) , consisting of: Ossicles. ...

4.Inner ear , consisting of: Cochlea.

Explanation:

The major parts of ear are:-

1) Outer ear

2) Middle ear

3) Inner ear

Answer:

D.

Object A will move in the direction of object B's velocity; object B will continue in that direction with a final speed less than its initial speed.

Explanation:

Conservation of Momentum. For every action will have an equal and opposite reaction. Object B will hit Object A transferring it's momentum to Object A and Object A will transfer it's momentum to Object B but since Object B is 5 times larger than Object A, Object A will only push back on Object B with a fraction of the force that Object B is pushing on Object A. Like a Bowling Ball when it hits bowling pins. The bowling ball continues to move in its direction but at a slower speed because it transferred speed to the bowling pins.

The sphere’s rotational kinetic energy is 0.031 J.

The rotational kinetic energy of a solid uniform sphere of mass 3.2 kg and radius 0.056 m rotating with an angular velocity of 7.1 rad/s about an axis through its center can be determined as shown below:

Rotational kinetic energy:

K.E. = 1/2 I ω²

Where I is the moment of inertia of the sphere about its axis of rotation, andω is the angular velocity of the sphereI for a solid uniform sphere is 2/5 m r².

Where m is the mass of the sphere and r is the radius of the sphere.

Substitute the values given in the problem into the equation for I.I = 2/5 m r²I = 2/5 (3.2 kg) (0.056 m)²I = 0.00125 kg·m²

Substitute the values for I and ω into the equation for rotational kinetic energy.

K.E. = 1/2 I ω²K.E. = 1/2 (0.00125 kg·m²) (7.1 rad/s)²K.E. = 0.031 J

Therefore, the sphere’s rotational kinetic energy is 0.031 J.

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Athletes are asked to immediately squat to a depth of their choosing and then jump as high as they can in the Countermovement Jump (CMJ), a vertical jump test.

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The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms. Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

In classical mechanics, atoms are described as miniature solar systems with electrons orbiting around the nucleus.

According to classical electromagnetic theory, an accelerated charged particle emits electromagnetic radiation.

Therefore, in the classical view, orbiting electrons would continuously lose energy and eventually spiral into the nucleus, causing atoms to collapse.

Quantum mechanics, on the other hand, provides a different perspective on the stability of atoms.

It introduces the concept of wave-particle duality, where particles like electrons can exhibit both particle-like and wave-like behavior.

In quantum mechanics, electrons are described by wave functions, which represent the probability distribution of finding the electron in different regions around the nucleus.

The key idea in quantum mechanics is that electrons can only occupy specific energy levels, or quantized states, within the atom. These energy levels are distinct and separated by energy gaps.

Electrons can transition between these energy levels by absorbing or emitting discrete amounts of energy, corresponding to the emission or absorption of photons.

The stability of atoms in quantum mechanics arises from the concept of the ground state.

The ground state is the lowest energy level that an electron can occupy, and it represents the most stable configuration for the atom. In this state, the electron does not emit any radiation and does not spiral into the nucleus.

The quantization of energy levels and the restrictions on electron transitions in quantum mechanics ensure the stability of atoms.

Electrons occupy specific energy levels and are confined to certain orbits around the nucleus, maintaining a balance between the attractive force of the nucleus and the centrifugal force of their motion.

Overall, quantum mechanics resolves the classical problem of instability in atoms by introducing the concept of quantized energy levels, which govern the behavior of electrons and prevent their collapse into the nucleus.

This understanding of atomic stability forms the basis for our modern understanding of the structure of matter and the functioning of atoms in chemical reactions.

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The magnitude of the acceleration of the descending block is (5/33) times the acceleration due to gravity.

The force of gravity acts on both blocks, but since the pulley is frictionless and the cord has negligible mass, the tension in the cord must be the same on both sides of the pulley. Let's assume that the descending block of mass 33m has an acceleration of a and the ascending block of mass 3m has an acceleration of a'.

The net force acting on the descending block is the difference between the force of gravity and the tension in the cord. Therefore, we can write:

(33m)g - T = (33m)a

where g is the acceleration due to gravity and T is the tension in the cord. Similarly, the net force acting on the ascending block is:

T - (3m)g = (3m)a'

Since the tension in the cord is the same on both sides of the pulley, we can equate T in the two equations above to get:

(33m)g - (3m)g = (33m)a + (3m)a'

Simplifying, we get:

a' - a = (10/33)g

But we know that the blocks are connected by a cord that cannot stretch or compress, so the acceleration of the two blocks must be the same in magnitude. Therefore, a' = a, and we can solve for a:

2a = (10/33)g

a = (5/33)g

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Answer:

The answer is 30 min

Explanation:

t = s/v

v = 70 m/min, s = 2100 m

t = 2100/70 = 30 min.

Hope it helps you! ＼(^ᴥ^)／

Answer:

If it is a True or False question then the answer would be TRUE

Explanation:

Answer:

23.6

Explanation:

The net force applied on the truck is 267.8 N.

The acceleration of the truck is 3.15 m/s².

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Given parameters:

Force applied on the truck: F = 295 N.

Mass of the trick: m = 85 kg.

Weight of the truck: W = mg = 85 kg × 10 m/s² = 850 N.

The coefficient of friction between the rock and the ground is μ = 0.32.

Frictional resistance force applied on the truck: f = μ N =  μW

= 0.32×85 N

= 27.2 N.

Hence, net force applied on the truck = F - f = 295 N - 27.2 N = 267.8 N.

Hence, acceleration of the truck is = 267.8 N/85 kg = 3.15 m/s².

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Process is a constant pressure process Heat transferred during the process Let's find out the heat transferred using the First law of thermodynamics.

= ΔU + W

where Q = heat transferred,

ΔU = change in internal energy,

W = work done

We know that the process is a constant pressure process, so the formula to calculate the work done by the system is:

W = PΔV

Where P is the constant pressure, and

ΔV is the change in volume. Substituting the given values in the above formula,

we get W = P2 - P1

= 200 kPa

ΔV = V2 - V1

= 650 - 350

= 300 km3

W = (200 × 10^3 Pa) × (300 × 10^-3 m³)

W = 60 J

Now, let's calculate the change in internal energy using the equation:ΔU = U2 - U1

Where U1 and U2 are the initial and final internal energies of the system respectively. For a constant pressure process, the change in internal energy is given by:ΔU = mCpΔT

where Cp is the specific heat capacity at constant pressure and

ΔT is the change in temperature. Substituting the given values,

ΔT = T2 - T1

= 650 - 350

= 300 K

We know that, Cp = 1.005 kJ/kg

KΔU = mCpΔT

= (2 kg) × (1.005 kJ/kgK) × (300 K)

ΔU = 601.5 J Now,

let's calculate the heat transferred during the process using the equation: Q = ΔU + WQ

= 601.5 J + 60

JQ = 661.5 J

Therefore, the heat transferred during the process is 661.5 J.

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Answer:

it is being accountable basically like some one can relive and trust that you'll do what you say your going to do

I believe they should fall at the same pace.