amples of coarse aggregate from a stockpile are brought to the laboratory for the determination of specific gravities. the following weights are found:

Answer:

Explanation:

Given:

Distance between gun and a back =2.1 m

height 1 = 1.6m

height 2 = 0.93m

Final velocity=0 m/sec

RTC=Initial velocity.

SOLUTION

FROM THE THIRD EQUATION OF A UNIFORMLY ACCELERATED MOTION,

0 m/s^2 = U^2 + 2×10m/s^2×2.1m

0 m/s = U^2 + 42s^2

-U^2 = 42 s^2 - 0m/s

∫-U^2= ∫42m/s

-U = 6.48m/s

-1 -1

Below is a list of the wavelengths in order of shortest to longest from left to right. Radiation comes in many different forms, including gamma rays, X-rays, UV, visible, infrared, microwaves, and radio waves.

The electromagnetic spectrum is made up of a wide variety of waves that are created when the electric field and magnetic field interact. It is believed that electromagnetic waves exhibit both wave and particle characteristics.

In essence, the photons—particle-like elements that make up electromagnetic waves and convey their energy, the wavelength and frequency of the waves. The class of electromagnetic waves is referred to as the "electromagnetic spectrum."

Electromagnetic waves are classified according to increasing wavelength: gamma rays, x-rays, ultraviolet, visible, infrared, microwaves, and radio waves.

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A shoe is a piece of footwear designed to protect and provide comfort to the human foot. It typically consists of a sole, an insole, and an upper part made of leather or other materials.

List of things disliked: High-heeled shoes

Ad:

Central Route: High-heeled shoes can cause long-term damage to your feet, leading to issues such as bunions, hammertoes, and plantar fasciitis. According to a study conducted by the American Podiatric Medical Association, 72% of women will suffer from foot problems from wearing high heels.

Peripheral Route:

1. Source: Celebrity testimonials from women who have suffered from foot problems due to wearing high heels, such as Victoria Beckham and Oprah Winfrey.

2. Message: "Don't sacrifice your health for fashion. Your feet deserve better than painful and damaging high heels. Choose comfort and style with our new line of comfortable shoes designed to keep your feet healthy and happy."

3. Channel: Social media platforms, as well as targeted advertisements on websites catering to women's fashion and health.

4. Emotion: We want you to feel empowered and confident in your choice to prioritize your health over fashion. By choosing our comfortable shoes, you are taking control of your well-being and showing that you value yourself and your body.

Therefore, We hope that our message resonates with you and that you choose to take care of your feet by choosing comfort and style with our new line of shoes.

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Answer:

5.5 KG is the mass

53.9 is the Weight

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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Given that the number of hailstones is n = 562

The mass of hailstone is m = 2 g = 0.002 kg

The speed of hailstone is v = 5.8 m/s

The time taken will be t = 92 s

The angle is

We have to calculate the force.

The force can be calculated by the formula

Substituting the values, the force will be

Scurvy and rickets are micronutrient deficiency diseases due to a lack of certain vitamins or minerals in the diet. Scurvy is caused by vitamin C deficiency and rickets by vitamin D.

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The role of the critical theorist in the emancipation process is similar to the role of a (B) freedom fighter.

Critical theorists aim to challenge and critique existing power structures and social norms to promote social justice and liberation. They analyze and question societal systems of oppression and seek to empower marginalized groups by exposing injustices and advocating for change.

Similar to freedom fighters who actively resist and fight against oppressive systems, critical theorists engage in intellectual activism, advocating for the liberation and empowerment of individuals and communities.

While other options like mediator, detective, and psychoanalyst may play important roles in various contexts, they do not capture the active and transformative nature of critical theory in the pursuit of emancipation and social transformation.

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Answer:

Resultant amplitude = 1 unit.

Explanation:

The amplitude of a wave is its maximum displacement during propagation.

Since the two waves are out of phase, the resultant amplitude can be determine by;

Resultant amplitude, \(A_{R}\) = \(\sqrt{A_{1} ^{2} + A_{2} ^{2} + 2A_{1} A_{2}cos \alpha }\)

                                        = \(\sqrt{(A_{1} - A_{2} )^{2} }\)

                                        = \(A_{1}\) -  \(A_{2}\)

where \(\alpha\) is the phase difference.

Given that: \(A_{1}\) = 75 units, \(A_{2}\) = 74 units, so that;

\(A_{R}\) = 75 - 74

     = 1

The resultant amplitude of the two wave when out of phase is 1 unit.

Answer:

Resultant amplitude = 1 unit.

Explanation:

The amplitude of a wave is its maximum displacement during propagation.

Since the two waves are out of phase, the resultant amplitude can be determine by;

Resultant amplitude,  =

                                       =

                                       =  -  

where  is the phase difference.

Given that:  = 75 units,  = 74 units, so that;

= 75 - 74

    = 1

The resultant amplitude of the two wave when out of phase is 1 unit.

Answer:

friction

air drag

every thing that opposes the motion affects kinetic energy

Explanation:

kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest

potential energy ∝ 1/(kinetic energy)

as kinetic energy increases potential energy decreases

Magnetic field lines visually represent the invisible lines of force in a magnetic field. By convention, these lines trace the direction of the magnetic force that a hypothetical north magnetic pole would experience if placed in the field.

The lines originate from the north pole of a magnet and terminate at its south pole. The density of the lines represents the strength of the magnetic field, with closely spaced lines indicating a stronger field.
Magnetic field lines follow a specific set of rules. Firstly, they form closed loops and never intersect with each other. This means that a magnetic field line cannot start or end in the middle of space; it must always form a continuous loop. Secondly, the lines exert a tangential force on a moving charged particle, causing it to experience a magnetic force perpendicular to both the field lines and the velocity of the particle. This behavior is described by the right-hand rule.
Overall, magnetic field lines provide a visual tool to understand and analyze magnetic fields and their effects on charged particles. They offer insights into the direction, strength, and distribution of magnetic forces within a given region.

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The direction of the magnetic force acting on the charged particles will be downwards.

The direction of the magnetic force acting on a charged particle depends on both the velocity of the particle and the direction of the magnetic field. To determine the direction of the magnetic force, we can use the right-hand rule.

When a positive charge moves in a magnetic field, the magnetic force acts perpendicular to both the velocity of the charge and the direction of the magnetic field. The right-hand rule states that if you point your thumb in the direction of the velocity of the positive charge and your fingers in the direction of the magnetic field, then the direction in which your palm faces will indicate the direction of the magnetic force.

In this case, since the positive charge is given an initial velocity to the right, we can point our thumb to the right. If the magnetic field is directed into the page (perpendicular to the plane of the paper), we can curl our fingers into the page. The palm of our hand will then face downwards, indicating that the magnetic force on the positive charge is directed downwards. Therefore, the direction of the magnetic force acting on the positive charge will be downwards.

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The resulting speed of the 50 kg kid, if was moving with an initial speed of 2 m/s is 0.8 m/s.

Speed is the rate of change of distance.

To calculate the resulting speed of the kid, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solv for v

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Among the options provided, electroweak unification (B) has been directly tested and confirmed through experiments in particle accelerators.

Electroweak unification refers to the combination of the electromagnetic and weak nuclear forces into a single force, known as the electroweak force. This unification was first proposed by Sheldon Glashow, Abdus Salam, and Steven Weinberg, who were later awarded the Nobel Prize in Physics in 1979 for their work.

Experiments at CERN, particularly with the Large Hadron Collider, have provided strong evidence supporting electroweak unification. This includes the discovery of weak bosons (W and Z particles) in the 1980s, which are responsible for mediating the weak nuclear force, and more recently, the discovery of the Higgs boson in 2012, which provides further understanding of how particles acquire mass.

While other unifications like GUT, grand unified force, and superforce are interesting theoretical concepts, they have not been directly tested or confirmed through experiments in particle accelerators to the same extent as electroweak unification.

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Pulsars, strongly magnetised, rotating neutron stars that emit electromagnetic radiation, do not emit visible light. Pulsars emit mostly radio waves, X-rays, and gamma rays. Pulsars don't emit visible light since their electromagnetic radiation beams aren't visible.

Pulsars are strongly magnetised, revolving neutron stars that release electromagnetic radiation in the form of radio waves. Pulsars mostly emit radio waves, but some emit X-rays and gamma rays. The pulsar's revolution generates high magnetic fields that accelerate charged particles and emit radiation.

Visible light has shorter wavelengths than radio waves and falls within a defined band of the electromagnetic spectrum. Pulsars can't generate visible light with their radio wave emission mechanisms. Thus, while pulsars are known for their radio wave pulses, they do not emit visible light pulses. Radio telescopes and other instruments that detect radio waves are used to observe pulsars.

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Complete Question :

None of the pulsars emit pulses of visible light because a. pulsars are to hot to emit visible light, b. pulsars contain black holes that won't let visible light escape, c. the gravitational field of a pulsar is so great that the visible light emitted is red shifted, d. pulsars are too far away for the visible light to be bright enough to be detected at Earth, e. A few pulsars do emit visible light pulses.

The time needed to take off is 0.8s

Acceleration can be defined as the rate of change of velocity. It is a vector quantity.

Given that a plane accelerates from rest at a constant rate of 5.0 m/s² along a runway that is 1800 mm long. Assume that the plane reaches the required takeoff velocity at the end of the runway.

The takeoff velocity V will be

V² = U² + 2aS

Where

Substitute all the parameters into the formula above

V² = 0 + 2 × 5 × 1.8

V² = 18

V = √18

V = 4.24 m/s

The time t needed to take off will be

V = U + at

4.24 = 0 + 5t

5t = 4.24

t = 4.24 / 5

t = 0.8 s

Therefore, the time needed to take off is 0.8s

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Answer:

The total distance covered is 3 km and the displacement is 2.24 km.

Explanation:

For the total distance covered by Anthony, we just add all of the distances.

1 km (going east) + 1 km (going east again) + 1 km (going south) = 3 km

Hence, the his total distance covered when he went to the pizza place is 3 km.

Solving for the displacement is a different matter. We cannot just add all of the distances. From analysis of the problem, Anthony traveled and formed a right triangle. He traveled 1 km east twice, making it 2 km east in total, then he traveled 1 km south.

When dealing with a right triangle with 2 sides given (for this problem the two sides are the 2 km east and the 1 km south), we use the Pythagorean Theorem.

Solution:

c² = a² + b²  (Pythagorean Theorem)

c will be the longest side of the right triangle

a and b will be the other sides of the right triangle

c = √ (a² + b²)

c = √ (2² km + 1² km)

c = √5 km

c = 2.2361 km ≈ 2.24 km

Therefore, the displacement of Anthony is 2.24 km.

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Answer:

It cannot reach us by conduction or convection as there is no medium such as air in most part of the space between the earth and the sun. From the sun the heat comes to us by another process known as radiation. The transfer of heat by radiation does not require any medium.

Answer:

Heat can't be transferred from sun to earth by conduction, because air is a bad conductor of heat. Convection is the transfer of heat in gases & liquids. Convection occurs when a heated fluid moves away from the source of heat and comes in contact with other substances, transferring some of their energy.

Answer:

Renewable sources are better because they don't damage the environment. As of now, there is a r=lot of damage already done to the environment thanks to non-renewable resources, and soon a lot of this damage will be irreversible. Another good thing about renewable resources is that that it is unlimited, this means that it is a steady source of energy and items.

Non renewable resources are good for the economy. People are so used to using non renewable resources that they might not want to switch over to renewable resources. People will keep buying these product so it is a steady item to invest in and profit off of. Non renewable resources also have a lot  more research on them and people have found multiple different ways to utilize it so people might like it more.

A colored light ray enters the air after passing through water (n = 1.33). The relative change in the ray's speed, frequency, and wavelength once it enters air is accurately described by the fact that both its speed and wavelength increase. Here option C is the correct answer.

When a light ray passes from one medium to another, such as from water to air, its speed, frequency, and wavelength change. The extent of this change depends on the refractive indices of the two media.

In this case, the refractive index of water is 1.33 and that of air is 1.00. When the monochromatic light ray enters air from water, its speed changes because the speed of light in air is greater than its speed in water. Since the speed of light in a medium is inversely proportional to its refractive index, the light ray's speed increases as it enters air. Therefore, option C, which says that its speed and wavelength both increase and its frequency decreases, is the correct answer.

The frequency of the light wave, which is the number of oscillations per second, remains the same because the frequency of the light wave is determined by the source that produced it and is independent of the medium through which it travels.

The wavelength of the light wave changes because the speed of light is different in the two media. Since the frequency of the wave is constant, the wavelength must change to ensure that the speed of the wave matches the speed of the medium through which it is traveling.

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Complete question:

A monochromatic light ray that has been traveling through water (n = 1.33) enters the air. After the ray enters the air, which of the following correctly describes the relative change in the speed and frequency? and wavelength of the ray?

A - its speed and wavelength both decrease; its frequency increases.

B - its speed and wavelength both decrease; its frequency stays the same.

C - its speed and wavelength both increase; its frequency decreases.

D - its speed stays the same, its wavelength increases, and its frequency decreases. its speed and wavelength both increase; its frequency stays the same.

As temperatures rise, the Earth's ice caps and glaciers begin to melt, which increases the volume of water in the ocean and causes sea levels to rise. The correct answer is option: 3.

This melting is caused by the increased heat energy absorbed by the Earth's atmosphere, which is largely the result of human activity and the burning of fossil fuels. Rising ocean temperatures can also contribute to the melting of ice caps, as warmer water can flow beneath them and cause them to melt from the bottom up. Additionally, warmer water can expand in volume, which also contributes to rising sea levels.  Hence option: 3 is correct.

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--The complete Question is, How are rising sea levels and rising ocean temperatures connected? (1 point)

The calculations for the given circuit with a coil of inductance 50mH and resistance 5Ω connected to a 110V DC supply are as follows:

(i) The final current is 22A.

(ii) the current after 4ms is approximately 17.55A.

(iii) the voltage across the resistor after 6ms is 87.75V.

(iv) the voltage across the inductance after 6ms is 22.25V.

(v) The current reaches 15A at approximately 6.29ms.

Given:

Inductance (L) = 50 mH = 50 × \(10^{-3\) H

Resistance (R) = 5 Ω

Supply voltage (V) = 110 V

(i) Final value of current:

I_f = V / R

I_f = 110 / 5

I_f = 22 A

(ii) Value of current after 4 ms:

τ = L / R

τ = (50 × \(10^{-3\)) / 5

τ = 10 × \(10^{-3\) = 10 ms

t = 4 ms = 4 × \(10^{-3\) s

I = I_f × (1 - \(e^{(-t/\tau)\))

I = 22 × (1 - \(e^{(-4 * 10^{-3} / 10 * 10^{-3})\))

I ≈ 17.55 A

(iii) Value of voltage across the resistor after 6 ms:

t = 6 ms = 6 × \(10^{-3\) s

V_R = I × R

V_R = 17.55 × 5

V_R = 87.75 V

(iv) Value of voltage across the inductance after 6 ms:

V_L = V - V_R

V_L = 110 - 87.75

V_L = 22.25 V

(v) Time when the current reaches 15 A:

I_target = 15 A

t = -τ × ln((I_f - I_target) / (I_f))

t = -10 × \(10^{-3\) × ln((22 - 15) / 22)

t ≈ 6.29 ms

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Answer:

Hdgdjdiehebhsiducggdgdhduudhd

1) Change in the shape or volume of rocks is Deformation

2) Stress is the deforming force. Strain is the deformation.

Deformation is the term denoting a change in a rock's volume or shape. Geological processes including tectonic forces, compression, tension, and shearing are just a few that can cause it. Rocks may fold, fault, or fracture as a result of deformation, resulting in the production of geological features as mountains, valleys, and fault lines.

Stress is the term used to describe the internal pressure or force that external pressures apply to a material. It is the force acting on the substance per unit area. The distortion that takes place in a material when it is stressed is measured by strain.

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(a) The mechanical advantage of the ramp is determined as 2.5.

(b) The pulley provides additional advantage since it assisted the boy in pulling up the load.

The mechanical advantage of an object is the ratio of output force to input force, hence it is called force ratio.

M.A = Lp/h

where;

M.A = 10/4

M.A = 2.5

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Answer:

(a)A contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball across a room are some of the everyday examples where contact forces are at work.

Polarized light light is unique in that it vibrates mostly in one direction.

Polarized mild waves are light waves in which the vibrations occur in a single plane. The process of reworking unpolarized light into polarized light is called polarization. There are a ramification of methods of polarizing mild.

Polarization is used for differentiating among transverse and longitudinal waves. Infrared spectroscopy makes use of polarization. it is used in seismology to take a look at earthquakes. In Chemistry, the chirality of organic compounds is tested the use of polarization strategies.

Refraction is the change in route of waves that takes place when waves tour from one medium to every other. . Light has a dual nature. as it has waves, sunlight passing via  rainstorm makes a rainbow. however, while mild moves a sun mobile, it can provide strength as a series of very small bursts. particles of count number have names together with the proton, electron and neutron.

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If a 75 kg man walks 0.5 m from one end of a 40 kg, 5.0 m canoe to the other end, he will be 8.58 m m away from the dock.

Thus, the correct answer is 8.58 m.

In the case above, we know that the man is on one side of the canoe. Thus, the final result is when he moves to the other side.

We are given:

The center of mass of the man and the canoe can be found using the formula:

x = (\(m_{1}\)\(d_{1}\) + \(m_{2}L\)/2) / (\(m_{1}\) + \(m_{2}\))

Substituting the values given above, we have:

\(x_{1}\) = (75 kg x 0.5 m + 40 kg x 2.5 m) / (75 kg + 40 kg)

\(x_{1}\) = 1.21 m

This is the distance of the center of mass from the dock when the man is on one side of the canoe. When he moves to the other side, the center of mass will also shift by the same distance, so:

\(x_{2}\) = 2L - x1

\(x_{2}\) = 2(5.0 m) - 1.21 m

\(x_{2}\) = 8.58 m

Therefore, when the man walks to the other side of the canoe, he will be standing 8.58 m away from the dock.

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